Stow Nighthawk Dedicated Light Tower Lt 12d User Manual

OPERATION MANUAL  
NIGHTHAWK SERIES  
MODELS LT-12D, LT-12P  
DEDICATED LIGHT TOWER  
(DEUTZ/LOMBARDINI DIESEL ENGINE)  
(PERKINS DIESEL ENGINE)  
Revision #1 (08/15/08)  
To find the latest revision of this  
publication, visit our website at:  
THIS MANUAL MUST ACCOMPANYTHE EQUIPMENT AT ALLTIMES.  
P/N: 49103  
TABLE OF CONTENTS  
STOW NIGHTHAWK  
LT-12 SERIES LIGHT TOWER  
Proposition 65 ................................................................. 2  
Reporting Safety Defects ................................................ 3  
Table of Contents............................................................. 3  
Safety Message Alert Symbols ................................... 4-5  
Rules For Safe Operation ............................................. 6-7  
Operation and Safety Decals........................................ 8-9  
Specifications (Light Tower) ........................................... 10  
Specifications (Engines)................................................ 11  
Dimensions.................................................................... 12  
General Information ....................................................... 13  
Components ..............................................................14-15  
Control Panel .............................................................16-17  
Floodlight Footcandle Plots ........................................... 18  
Towing Guidelines ......................................................19-20  
Trailer Safety Guidelines............................................21-22  
TrailerWiring Diagram .................................................... 23  
Inspection ..................................................................24-27  
Startup Procedure ......................................................... 28  
Shutdown Procedure ..................................................... 29  
Mast Operation .............................................................. 30  
Operation ....................................................................... 31  
Maintenance ..............................................................32-36  
Troubleshooting (Generator) ........................................... 37  
Troubleshooting (Engine) ...........................................38-39  
Troubleshooting (Lamps)............................................40-42  
Schematic Diagram ....................................................... 43  
Deutz Engine Wiring ...................................................... 44  
Perkins EngineWiring .................................................... 45  
For Deutz/Lombardini Parts  
information, please see our LT-12  
Deutz F3M1008F Diesel Engine  
Parts Manual.  
LT-12 SERIES LIGHT TOWER — OPERATION MANUAL — REV. #1 (08/15/08) — PAGE 3  
LT-12 SERIES LIGHTTOWER — SAFETY MESSAGE ALERT SYMBOLS  
Potential hazards associated with the LT-12 Series Light  
Tower operation will be referenced with Hazard Symbols  
which appear throughout this manual, and will be referenced  
in conjunction with Safety Message Alert Symbols.  
FORYOUR SAFETY ANDTHE SAFETY OF OTHERS!  
Safety precautions should be followed  
at all times when operating this  
equipment. Failure to read and  
understand the Safety Messages and  
Operating Instructions could result in  
injury to yourself and others.  
HAZARD SYMBOLS  
WARNING - Lethan Exhaust Gasses  
Engine exhaust gases contain  
poisonous carbon monoxide. This gas  
is colorless and odorless, and can  
cause death if inhaled. NEVER operate  
this equipment in a confined area or  
enclosed structure that does not provide  
ample free flow air.  
This Owner's Manual has been  
developed to provide complete  
instructions for the safe and  
efficient operation of the  
LT-12 Series LightTower.  
Before using this Light Tower, ensure that the operating  
individual has read and understands all instructions in this  
manual.  
WARNING - Explosive Fuel  
Diesel fuel is extremely flammable, and  
its vapors can cause an explosion if ignited.  
DO NOT start the engine near spilled fuel  
or combustible fluids.  
SAFETY MESSAGE ALERT SYMBOLS  
The three (3) Safety Messages shown below will inform you  
about potential hazards that could injure you or others. The  
Safety Messages specifically address the level of exposure  
to the operator, and are preceded by one of three words:  
DANGER, WARNING, or CAUTION.  
DO NOT fill the fuel tank while the engine is running or  
hot. DO NOT overfill tank, since spilled fuel could ignite if  
it comes into contact with hot engine parts or sparks from  
the ignition system. Store fuel in approved containers, in  
well-ventilated areas and away from sparks and flames.  
DANGER  
You WILL be KILLED or SERIOUSLY injured if you DO  
NOT follow directions.  
WARNING - Burn Hazards  
Engine components can generate extreme  
heat. To prevent burns, DO NOT touch  
these areas while the engine is running or  
immediately after operations. Never  
operate the engine with heat shields or heat  
guards removed.  
WARNING  
You CAN be KILLED or SERIOUSLY injured if you DO  
NOT follow directions.  
CAUTION  
CAUTION - Respiratory Hazard  
You CAN be INJURED if you DO NOT follow directions.  
ALWAYS wear approved respiratory  
protection when required.  
PAGE 4 — LT-12 SERIES LIGHT TOWER — OPERATION MANUAL — REV. #1 (08/15/08)  
LT-12 SERIES LIGHTTOWER — SAFETY MESSAGE ALERT SYMBOLS  
CAUTION - Rotating Parts  
CAUTION - Equipment Damage Messages  
NEVER operate equipment with covers,  
or guards removed. Keep fingers, hands,  
hair and clothing away from all moving  
parts to prevent injury.  
Other important messages are provided throughout this  
manual to help prevent damage to your light tower, other  
property, or the surrounding environment.  
This light tower, other  
property, or the surrounding  
environment could be  
damaged if you do not follow  
CAUTION - Accidental Starting  
ALWAYS place the power source, circuit  
breakers or ON/OFF switch in the OFF  
position, when the generator is not in use,  
unless connected to transfer switch.  
instructions.  
CAUTION - Sight and Hearing Hazards  
ALWAYS wear approved eye and  
hearing protection.  
CAUTION - Over-Speed Conditions  
NEVER tamper with the factory settings of  
the engine governor settings.Personal injury  
and damage to the engine or equipment can  
result if operating speed ranges above  
maximum allowable.  
LT-12 SERIES LIGHT TOWER — OPERATION MANUAL — REV. #1 (08/15/08) — PAGE 5  
LT-12 SERIES LIGHTTOWER — RULES FOR SAFE OPERATION  
The engine of this light tower/generator requires an adequate  
free flow of cooling air. NEVER operate the generator in any  
enclosed or narrow area where free  
WARNING - READTHIS MANUAL  
Failure to follow instructions in this manual may lead to  
Serious Injury or even Death. This equipment is to be  
operated by trained and qualified personnel only! This  
equipment is for industrial use only.  
flow of the air is restricted. If the air  
flow is restricted it will cause serious  
damage to the generator engine  
and may cause injury to people.  
Remember the engine of the light  
tower/generator gives off DEADLY  
The following safety guidelines should always be used  
when operating the LT-12 Lighttower.  
carbon monoxide gas.  
Safety  
DO NOT operate or service this equipment  
before reading this entire manual.  
ALWAYS refuel in a well-ventilated area, away from sparks  
and open flames.  
This equipment should not be operated  
by persons under 18 years of age.  
ALWAYS use extreme caution when  
working with flammable liquids. When  
refueling, stop the engine and allow it to  
cool. DO NOT smoke around or near the  
machine. Fire or explosion could result from  
fuel vapors, or if fuel is spilled on a hot engine.  
NEVER operate this equipment without  
proper protective clothing, shatterproof glasses,  
steel-toed boots and other protective devices  
required by the job.  
NEVER operate the light tower/generator in an explosive  
atmosphere or near combustible materials. An explosion or  
fire could result causing severe bodily harm or even death.  
Topping-off to filler port is dangerous, as it tends to spill fuel.  
NEVER operate this equipment when not  
feeling well due to fatigue, illness or taking  
medicine.  
ALWAYS make sure that the light tower/generator is secure  
on level ground so that it cannot slide or shift around,  
endangering workers. Also keep the immediate area free of  
bystanders.  
NEVER operate the saw under the  
influence or drugs or alcohol.  
ALWAYS use a trained technician to install and remove a  
floodlight, or replace any damaged fixture wiring.  
NEVER use accessories or attachments, which are not  
recommended by Stow for this equipment. Damage to the  
equipment and/or injury to user may result.  
NEVER leave any grease or oil residue on glass surface  
when replacing or removing bulbs. This can create hot spots,  
reducing the service life of the bulb or causing outer jacket  
to burst.  
Manufacturer does not assume responsibility for any accident  
due to equipment modifications. Unauthorized equipment  
modification will void all warranties.  
ALWAYS make sure trailer is leveled with all outriggers  
extended before raising tower. Outriggers must remain  
extended while tower is up.  
Whenever necessary, replace nameplate, operation and  
safety decals when they become difficult read.  
ALWAYS check all the bolts on the light tower for tightness.  
ALWAYS keep area behind trailer clear of people while  
raising and lowering mast.  
NEVER touch the hot exhaust manifold,  
muffler or cylinder. Allow these parts to  
cool before servicing engine or  
generator.  
NEVER remove safety pin or pull mast locking pin while  
tower is in an raised position!  
CHECK the mast and winch cables for wear.If any problem  
occurs when lower or raising the tower STOP immediately!  
Contact a trained technician for assistance.  
HighTemperatures – Allow the engine  
to cool before adding fuel or performing service and  
maintenance functions. Contact with hot components can  
cause serious burns.  
NEVER pivot or retract mast while unit is operating.  
PAGE 6 — LT-12 SERIES LIGHT TOWER — OPERATION MANUAL — REV. #1 (08/15/08)  
LT-12 SERIES LIGHTTOWER — RULES FOR SAFE OPERATION  
DANGER - High Danger Areas  
DANGER - Overhead Obstruction Danger  
The 5 DANGER items listed below are considered  
High DANGER areas and should be adhered to. Failing to  
understand these areas could result in Bodily Harm,  
Electrical Shock, Electrocution, and even Death! Please  
pay close attention when operating the light tower.  
ALWAYS make sure the area  
above Light tower is open  
and clear of overhead power  
lines and other obstructions.  
The tower extends in excess  
of 30 ft. (9 meters). Contact  
with overhead powerlines or  
other obstructions could result  
in equipment damage,  
DANGER - Grounding the LT-12 for Operation  
The LT-12 Light tower is equipped with  
a ground terminal for your protection.  
ALWAYS complete the grounding  
path from the light tower to an external  
grounding source.  
Serious Injury or Death!  
NEVER touch bulbs while in use. Bulbs become extremely  
hot when in use! Allow bulbs and fixture to cool at least 10-  
15 minutes before handling.  
ALWAYS make certain the light tower is well grounded and  
securely fastened to a good earth ground (ground rod).The  
possibility exists of Electrical Shock, Electrocution, and  
even Death if the light tower is not grounded.  
ALWAYS retract the mast before lowering the tower to  
transport position.  
Maintenance Safety  
DANGER - Electric Shock Hazards  
NEVER lubricate components or attempt service on a running  
NEVER operate the LT-12 Light tower  
or handle any electrical equipment  
while standing in water, while bare  
foot, while hands are wet, or in the  
rain. A dangerous electrical shock  
light tower/generator.  
ALWAYS allow the light tower/generator a proper amount of  
time to cool before servicing.  
Keep the light tower/generator in proper running condition.  
could occur causing Severe Bodily Harm or even Death.  
Fix damage to the light tower/generator immediately and  
always replace broken parts.  
ALWAYS keep electrical cords in good condition.Worn,  
bare or frayed wiring can cause electrical shock, thus  
causing Bodily Harm or even Death.  
Emergencies  
WET  
HANDS  
ALWAYS know the location of the  
nearest fire extinguisher.  
NEVER grab or touch a live power  
cord with wet hands, the possibility  
exists of Electrical Shock,  
ALWAYS know the location of the nearest  
first aid kit.  
Electrocution, and even Death!  
POWER  
CORD  
(POWER ON)  
In emergencies always know the location of the nearest phone  
or keep a phone on the job site. Also know the phone  
numbers of the nearest ambulance, doctor and fire  
department. This information will be invaluable in the case  
of an emergency.  
NEVER use the light tower mast as a crane. DO NOT lift  
anything with the mast.  
NEVER attach anything to the light tower mast.  
ALWAYS keep the immediate area surrounding the light  
tower clean, neat, and free of debris.  
ALWAYS lower the tower when not in use, or if high winds or  
electrical storms are expected in the area.  
NEVER pivot or retract mast while unit is operating.  
LT-12 SERIES LIGHT TOWER — OPERATION MANUAL — REV. #1 (08/15/08) — PAGE 7  
LT-12 SERIES LIGHTTOWER — OPERATION AND SAFETY DECALS  
Machine Safety Decals  
This dedicated light tower is equipped with a number of safety decals. These decals are provided for operator safety and maintenance  
information.The illustration below and on the next page shows these decals as they appear on the machine.Should any of these  
decals become unreadable, replacements can be obtained from your dealer.  
Figure 1. Operation and Safety Decals  
PAGE 8 — LT-12 SERIES LIGHT TOWER — OPERATION MANUAL — REV. #1 (08/15/08)  
LT-12 SERIES LIGHTTOWER — OPERATION AND SAFETY DECALS  
Figure 1. Operation and Safety Decals (Continued)  
LT-12 SERIES LIGHT TOWER — OPERATION MANUAL — REV. #1 (08/15/08) — PAGE 9  
LT-12 SERIES LIGHTTOWER — SPECIFICATIONS (LIGHTTOWER)  
TABLE 1. SPECIFICATIONS  
LT-12D  
LT-12P  
Light Tower Model  
Deutz F3m1008F/  
Lombardini LDW 1003  
Diesel Engine  
Perkins 103-10  
Diesel Engine  
Engine Model  
Weight (Dry)  
1,550 lbs. (700 kg.)  
Dimensions  
See Table 3  
5
Support Points  
Wind Stability with Genset.  
Floodlights  
65 mph (80.46 kph)  
4-1,000 Watt Metal Halide  
440,000  
Lumens  
Light Coverage  
5 to 7 acres  
Light Termination  
4 x 3-pin QD plug  
Generator Specifications  
GFCI Receptacle Output  
Twist-Lock Receptacle Output  
GFCI Circuit Breaker (Amps)  
Twist-Lock Circuit Breaker (Amps)  
Continuous Output (Watts)  
Noise Level @ 23 ft. (7 m)  
Trailer Specification  
Jackstand Capacity  
Hitch Type  
120 VAC @ 15 A (US only)  
240 VAC @ 25 A (US only)  
15 A  
25 A  
6,000 W  
73 db.  
2,000 lbs. (907 kg.)  
2 in. Ball (Optional Pintle Kit availible)  
13 in. (330 mm.)  
13 x 4.5 in. (330 x 114 mm)  
2,000 lbs. (907 kg.)  
5-Lug  
Tire Size  
Tire Rim Size  
Axle Capacity  
Hub Type  
Suspension Type  
3-Leaf  
Electrical Tail-light Connector  
Winch Capacity  
4-Wire  
1,500 lbs. (680 kg.)  
3/16 in.  
Winch Rope Wire  
PAGE 10 — LT-12 SERIES LIGHT TOWER — OPERATION MANUAL — REV. #1 (08/15/08)  
LT-12 SERIES LIGHTTOWER — SPECIFICATIONS (ENGINES)  
Table 2. Engine Specifications  
Engine Type  
Aspirated 4-stroke, 3-cylinder, 1 liter Diesel Engine  
2.95 in. X 2.83 in. (75 mm x 72 mm)  
58.21 cu. in. (954 cc)  
12 H.P. at 1,800 R.P.M.  
10.5 H.P. at 1,800 R.P.M.  
Approx. 30 U.S. Gallons (113 Liters)  
64 Hours  
Bore X Stroke  
Displacement  
Max Output Standby  
Max Output Prime  
Fuel Tank Capacity  
Run Time With 4 Lights  
Standard Idle Speed  
Fuel Type  
Perkins Model  
103-10 Diesel  
Engine  
1,800 R.P.M.  
N0. 2 Diesel Fuel  
Lube Oil Capacity  
Cooling System  
Coolant Capacity  
Starting Method  
Battery Type  
7.4 U.S. Pints (3.5 Liters)  
Water-cooled  
8.0 U.S. Pints (3.8 Liters)  
Electric Start  
Group 12  
Total Weight (Dry)  
Total Weight (Wet)  
Engine Type  
280 lbs. (127 Kg.)  
287 lbs. (130 Kg.)  
3-cylinder, Diesel Engine  
62.73 cu. in. (1028 cc)  
12 H.P. at 1,800 R.P.M.  
Approx. 30 U.S. Gallons (113 Liters)  
64 Hours  
Displacement  
Max Output Standby  
Fuel Tank Capacity  
Run Time With 4 Lights  
Standard Idle Speed  
Fuel Type  
Lombardini  
Model LDW  
1003/Diesel  
Engine  
1,800 R.P.M.  
or  
N0. 2 Diesel Fuel  
Deutz Model  
F3M008F  
Diesel Engine  
Oil Sump Capacity  
Cooling System  
Starting Method  
Battery Type  
2.5 U.S. Quarts (2.36 Liters)  
Liquid-cooled  
Electric Start  
Group 24  
Total Weight (Dry)  
187.3 lbs. (85 Kg.)  
LT-12 SERIES LIGHT TOWER — OPERATION MANUAL — REV. #1 (08/15/08) — PAGE 11  
LT-12 SERIES LIGHTTOWER — DIMENSIONS  
Figure 2. Dimensions  
TABLE 3. DIMENSIONS  
Reference Letter  
Description  
Dimension in. (mm.)  
A
B
C
D
E
F
Length (Mast Stowed Position)  
Length (Mast Deployed Position)  
Max. Height (Mast Deployed Position)  
Height (Mast Stowed Position)  
Ground Clearance (From Axle)  
Width (Tow Ready)  
170 in. (431 cm.)  
101 in. (256 cm.)  
31.5 ft. (9.6 m)  
74 in. (187 cm.)  
8 in. (20 cm.)  
51 in. (129 cm.)  
109 in. (276 cm.)  
G
Width (Outriggers Deployed)  
PAGE 12 — LT-12 SERIES LIGHT TOWER — OPERATION MANUAL — REV. #1 (08/15/08)  
LT-12 SERIES LIGHTTOWER — GENERAL INFORMATION  
The Stow LT-12 Series Light Tower is a dedicated general For ease of service or transport, each floodlight is equipped  
purpose floodlight tower intended for emergency and remote with a quick-disconnect connector that allows the lamp fixture to  
lighting conditions.  
be removed quickly. This feature is extremely useful during  
transport of the light tower over rough terrain.It is always best to  
remove the floodlights and pack them safely so they will not get  
damaged.  
The light tower can be raised vertically in excess of 31.5 feet  
(9.6 meters) by means of a manual winch.The tower tensioning  
system is designed to provide the necessary tension to safely  
control the pivot of the tower.Outriggers and rear support stand As an added feature, the LT-12 is available with two auxiliary  
must be deployed prior to raising the mast.  
output receptacles. The upper most receptacle(twist-lock),  
located at the front of the light tower, can provide 240VAC at 25  
amps. The bottom receptacle is a GFCI receptacle which can  
supply 120VAC at 15 amps.These receptacles that can be used  
for light power tools or other similar applications.  
DANGER - Overhead Obstruction Danger  
ALWAYS make sure the area  
above Light tower is open and  
clear of overhead power lines  
and other obstructions. The  
tower extends in excess of 30  
ft. (9 meters). Contact with  
overhead powerlines or other  
obstructions could result in  
equipment damage, Serious  
Injury or Death!  
Some LT-12 Light towers are  
equipped with a Lombardini  
Diesel Engine. All procedures &  
references to Deutz engines in  
this manual may be applied to  
Lombardini engines unless  
specifically noted otherwise.  
The lighting system of Stow's LT-12 Series Light Tower is  
comprised of 4 "Metal Halide" 1000 watt lamps. Each lamp has  
an output of 110,000 lumens yielding a total of 440,000 lumens  
for all four floodlights.Typical lighting coverage is between 5 to 7  
acres.  
Each floodlight requires a ballast for starting. Located on the  
control panel of the generator is a weather resistant ballast box  
that the contains the ballast for each floodlight.The control panel  
contains four ON/OFF circuit breakers for each floodlight.  
LT-12 SERIES LIGHT TOWER — OPERATION MANUAL — REV. #1 (08/15/08) — PAGE 13  
LT-12 SERIES LIGHTTOWER — COMPONENTS  
Figure3. MajorComponents(ControlPanelSide)  
Figure 3 and 4 shows the location of the controls and components  
9. Tower Lock/Release Pin – Pull this pin to release tower  
for the LT-12 Series LightTower.The functions of each control is  
described below:  
mastfromcradlesupport.  
10. Jack Stands – There are two trailer jack stands, which are  
located at the front and rear of the trailer. Use these 2 jack  
stands to level and support the light tower.  
1. Mast Rotation Locking Knob – Unscrew this knob to  
releasemastforrotation.  
2. VerticalMastExtensionWinchUsethiswinchtoextend  
the mast to the desire height. Maximum height is approxi-  
mately31.5feet(9.6meters).  
11. ChockBlocksPlacetheseblocks(notincludedaspartof  
thelighttowerpackage)undereachtrailerwheeltoprevent  
rolling.  
3. Mast Rotation Handle – Grip this handle to rotate mast to  
desired position.To lock mast tighten mast rotation locking  
knob.  
12. OutriggerJacksUsethese2outriggerjackstoleveland  
support the light tower.  
13. Control Panel/ Ballast Compartment – This panel con-  
tains the ON/OFF circuit breakers for each flood light. In  
addition, located behind the control panel are the ballasts  
and electrical components for each floodlight.  
4. Lifting Bail – When lifting of the light tower by crane is  
required,usethisliftingbail.Note:thisliftingbailisbalanced  
forafullyconfiguredlighttower;removalofanylighttower  
components will un-balance the lifting bail.  
14. Safety Chain – Always attach safety chain to the towing  
vehicle. Never tow the light tower with the safety chain  
unattached.  
5. ForkliftPocketsWhenliftingofthelighttowerisrequired,  
usetheseforkliftpocketstoliftthelighttower.Rememberto  
inserttheforksofthe forkliftaminimumof24inchesintothe  
mastforkliftpockets.  
15. Ball Hitch Coupler – Attach this coupler to the towing  
vehicle.Useonlythespecifiedballdiameterasindicatedon  
your coupler. Use of any other ball diameter will create an  
extremely dangerous condition which can result in separa-  
tion of the coupler and ball or ball failure.  
6. Mast Cradle Support – When towing of the light tower is  
required,placethetowermastintothecradlesupport.Make  
suretowerreleasepinhasbeeninsertedandmastislocked.  
7. T-Bar – Allows the floodlights to be mounted vertically or  
16. Vertical MastWinchUsethiswinchtoraisethemastthe  
totheverticalposition.Oncemastisinthefullverticalposition  
the locking pin engages automatically.  
horizontally.  
8. Flood Light – 1000 watt "Metal Halide" type bulb with a  
110,000 lumens capacity. Light coverage is typically be-  
tween 5 to 7 acres.  
17. MastLocking/ReleasePinPullthispintostartplacingthe  
towermastintheverticalposition. Lockingpinautomatically  
engageswhentowermasthasreachedfullverticalposition.  
PAGE 14 — LT-12 SERIES LIGHT TOWER — OPERATION MANUAL — REV. #1 (08/15/08)  
LT-12 SERIES LIGHTTOWER — COMPONENTS  
Figure 4. Major Components (Front/Rear)  
18. EngineExhaust PipeDirectsengineexhausttotherear  
21. TiresThislighttowerusesaST175-13Csizetire.Replace  
withonlyrecommendedtiresize.NEVERtowlighttowerwith  
bad or worn tires.  
ofthelighttower.NEVERblockthisexhaustpipewithobstruc-  
tions. ALWAYS place the generator in an area free of  
obstructions.  
22. DocumentationBoxContainsinformationregardingthe  
lighttower.  
CAUTION - Burn Hazard  
23. 240 VACTwist-Lock Receptacle – This twist-lock recep-  
The exhaust pipe will become extremely hot  
when the engine is in use. NEVER touch the  
exhaust pipe when the engine is running. The  
possibility exists of severe burns to the skin.  
Allow the exhaust pipe to cool before  
touching.  
tacle provides 240VAC, 25 amps.  
24. 120VACGFCIReceptacleThisGFCIreceptacleprovides  
120VAC, 15 amps.  
19. License Light – This light illuminates the license plate.  
Whenevertowingofthelighttowerisrequired,makesurethis  
light is operational.  
20. BrakeLightsBeforetowingthelighttower,makesurethat  
theselightsareoperationalandareworkingcorrectly.NEVER  
tow the light tower if these lights are inoperative.  
LT-12 SERIES LIGHT TOWER — OPERATION MANUAL — REV. #1 (08/15/08) — PAGE 15  
LT-12 SERIES LIGHTTOWER — CONTROL PANEL  
tors  
PAGE 16 — LT-12 SERIES LIGHT TOWER — OPERATION MANUAL — REV. #1 (08/15/08)  
LT-12 SERIES LIGHTTOWER — CONTROL PANEL  
Figure 5 shows the location of the basic control panel components  
for the LT-12 Light Tower. Listed below is a brief explanation of  
each control or component.  
10. Pre-Heat Indicator Light/Battery Charge Light –  
Indicates when the glow plugs have been heated up for  
starting the engine. If the light is flashing, a low battery  
charge is detected.  
1. Internal Cabinet Light Switch This switch controls the  
internal cabinet light for the light tower control panel. When  
the cabinet door is raised, the light will automatically come  
on. When the cabinet door closes, the switch is depressed  
and the light turns off.  
11. Ignition Key Switch – Insert key into ignition switch and  
turn clockwise to the ON position to warm the glow plugs.  
When glow plug indicator light goes OFF, turn the key to  
the START position.Release key when engine starts.  
2. Internal Cabinet Light – Provides illumination for the LT-  
12 control panel during nighttime operation. The light is  
activated when the cabinet door is raised.  
Items12 -18refer tothe  
Lombardini Engine  
Control Panel only.See  
Figure 5.  
3. Hour Meter – This digital hour meter indicates the number  
of hours machine has been in use.  
4. Main Circuit Breaker – A double-pole 25 amp, ON/OFF  
circuit breaker which protects the 240 VAC twist-lock  
receptacle from overload. In addition it allows voltage to be  
supplied to the GFCI receptacle and 15 amp breakers (4).  
5. GFCI Receptacle Circuit Breaker – A single-pole, 15  
amp, ON/OFF circuit breaker which protects the GFCI  
receptacle from overload.  
12. Normal Operation Indicator Light – This  
OK  
indicator light is illuminated when the engine is  
functioning normally.  
6. Flood Light Circuit Breakers – A single-pole, 15 amp,  
ON/OFF circuit breaker for each floodlight (4).  
13. Low Oil Shutdown Indicator Light – This  
indicator light is illuminated when the engine  
has shut down due to low oil pressure. Service  
as needed.  
14. High Temperature Indicator Light – This  
indicator light is illuminated when the engine has  
shut down due to high water temperature. Service  
as needed.  
Items 7 - 11 refer to the  
Perkins Engine Control  
Panel only. See Figure 5.  
15. Alternator Indicator Light – This indicator light  
is illuminated when the engine has shut down  
due to high water temperature. Service as  
needed.  
16. Glow Plug Indicator Light – This indicator light  
is illuminated when the glow plugs have been  
heated for starting the engine.  
7. Air Filter Indicator Alarm Light This alarm light flashes  
when a problem with the air filter is detected. Service as  
required.  
17. Air Filter Restriction Indicator Light – This  
indicator light is illuminated when the engine  
has shut down due to blockage in the air filter.  
Service as needed.  
8.  
WaterTemperature Alarm Light – This alarm light flashes  
when the water temperature becomes to hot for normal  
engine operation. Service as required.  
18. Ignition Key Switch – Insert key into ignition  
switch and turn clockwise to the ON position to  
warm the glow plugs.When glow plug indicator  
light goes OFF, turn the key to the START position.  
Release key when engine starts.  
9. Oil Pressure Alarm Light – This alarm light flashes when  
the oil pressure has fallen to low for normal engine  
operation. Service as needed.  
LT-12 SERIES LIGHT TOWER — OPERATION MANUAL — REV. #1 (08/15/08) — PAGE 17  
LT-12 SERIES LIGHTTOWER — FLOOD LIGHT FOOTCANDLE PLOT  
Figure 6. Floodlight Footcandle Plot (Area Coverage)  
PAGE 18 — LT-12 SERIES LIGHT TOWER — OPERATION MANUAL — REV. #1 (08/15/08)  
LT-12 SERIES LIGHTTOWER TOWING GUIDELINES  
Inflate tires to correct pressure, inspect tires for cuts, and  
excessive wear.SeeTable 3 (Tire WearTroubleshooting).  
Towing Safety Precautions  
CAUTION - LocalTowing Regulations  
Check wheel mounting lug nuts with a torque wrench.  
Torque wheel lug nuts as described in the "Lug NutTorque  
Requirements", Table 5.  
Check with your county or state safety towing regulations  
department before towing your light tower.  
Check tightness of hanger bolt, shackle bolt, and U-blots  
nuts, torque suspension hardware perTable 4.  
To reduce the possibility of an accident while transporting the  
light tower on public roads, always make sure that the trailer and  
the towing vehicle are in good operating condition and both  
units are mechanically sound.  
Avoid sudden stops and starts.This can cause skidding, or  
jackknifing. Smooth, gradual starts and stops will improve  
gas milage.  
Avoid sharp turns to prevent rolling.  
The following list of suggestions should be used when towing  
the light tower:  
Swivle all jackstands parallel to the ground before  
transporting.  
Remember, when transporting of the  
light tower is required, always  
DO NOT transport light tower with fuel in the generator fuel  
tank.  
remove the floodlights and pack  
them safely so they will not get  
damaged.  
CAUTION - Defective/DamagedTrailer Couplings  
If the trailer coupler is deformed replace entire coupler.NEVER  
tow the light tower with a defective trailer coupler.There exist  
the possibility of the trailer separating from the towing vehicle.  
Make sure that the hitch and coupling of the towing vehicle  
are rated equal to, or greater than the trailer "gross vehicle  
weight rating" (GVWR). SeeTable 1 for light tower weight.  
Light Tower Trailer Vehicle Connection  
ALWAYS inspect the hitch and coupling for wear. NEVER  
tow the light tower's trailer with defective hitches, couplings,  
chains etc.  
1. Check the vehicle hitch ball, and trailer coupler for signs of  
wear or damage. Replace any parts that are worn or  
damaged before towing.  
CHECK the tire air pressure on both the towing vehicle and  
the trailer.Also check the tire tread wear on both vehicles.  
2. Use only the 2-inch ball diameter as indicated on the trailer's  
coupler. Use of any other ball diameter will create an  
extremely dangerous condition which can result in  
separation of the coupler and ball or ball failure.  
ALWAYS make sure the trailer section of the light tower is  
equipped with a "Safety Chain".  
ALWAYS attach trailer's safety chain to frame of towing  
vehicle.  
3. Be sure the coupler is secured to the hitch ball and the lock  
lever is down (locked).  
ALWAYS make sure that the vehicle and trailer directional,  
backup, brake, and trailer lights are connected properly and  
are working properly.  
4. Attach safety chains as shown in Figure 7. Remember to  
cross the safety chains.  
5. After towing for about 50 miles recheck the entire towing  
system for tightness.  
Remember in most cases the maximum speed unless  
otherwise posted for highway towing is 55 MPH, however  
before towing your light tower, check your local state, and  
county vehicle towing requirements. Recommended off-road  
towing is not to exceed 15 MPH or less depending on type of  
terrain.  
Recommended Maintenance  
1. Smear ball socket and clamp face with chassis grease.  
Periodically oil pivot points and wear surfaces of the coupler  
with SAE 30W motor oil.  
2. When parking or storing the light tower, keep the coupler off  
the ground so dirt and other debris will not build up in the  
ball socket.  
Place chocked blocks underneath wheel to prevent rolling,  
while parked.  
Depending on soil conditions and location it may be  
necessary to place support blocks underneath the trailer's  
bumper to prevent tipping, while parked.  
LT-12 SERIES LIGHT TOWER — OPERATION MANUAL — REV. #1 (08/15/08) — PAGE 19  
LT-12 SERIES LIGHTTOWER TOWING GUIDELINES  
Figure 7. Safety Chains/Trailer Coupler Hook-up  
PAGE 20 — LT-12 SERIES LIGHT TOWER — OPERATION MANUAL — REV. #1 (08/15/08)  
LT-12 SERIES LIGHTTOWER TRAILER SAFETY GUIDELINES  
Tires/Wheels/Lug Nuts  
Tires and wheels are a very important and critical components  
of the trailer. When specifying or replacing the trailer wheels it is  
important the wheels, tires, and axle are properly matched.  
WARNING -Wheel Repair/Modification  
DO NOT attempt to repair or modify a  
wheel. DO NOT install an inter-tube to  
correct a leak through the rim. If the rim  
is cracked, the air pressure in the inter-  
tube may cause pieces of the rim to  
explode (break-off) with great force and  
can cause serious eye or bodily injury.  
TiresWear/Inflation  
Suspension  
Tire inflation pressure is the most important factor in tire life.  
Pressure should be checked cold before operation. DO NOT  
bleed air from tires when they are hot. Check inflation pressure  
weekly during use to insure the maximum tire life and tread  
wear.  
The leaf suspension springs and associated components  
(Figure 8) should be visually inspected every 6,000 miles for  
signs of excessive wear, elongation of bolt holes, and loosening  
of fasteners. Replace all damaged parts (suspension) immedi-  
ately.Torqued suspension components as detailed inTable 4.  
Table 3 (TireWearTroubleshooting) will help pinpoint the causes  
and solutions of tire wear problems.  
WARNING - Safety Glasses Required  
ALWAYS wear safety glasses when  
removing or installing force fitted parts.  
Failure to comply may result in serious  
injury.  
Figure 8. Major Suspension Components  
LT-12 SERIES LIGHT TOWER — OPERATION MANUAL — REV. #1 (08/15/08) — PAGE 21  
LT-12 SERIES LIGHTTOWER TRAILER SAFETY GUIDELINES  
TABLE 4. SUSPENSION TORQUE REQUIREMENTS  
Item  
Torque (Ft.-Lbs.)  
MIN-30 MAX-35  
MIN-45 MAX-60  
MIN-45 MAX-50  
3/8" U-BOLT  
7/16" U-BOLT  
1/2" U-BOLT  
SNUG FIT ONLY. PARTS MUST ROTATE FREELY.  
LOCKING NUTS OR COTTER PINS ARE PROVIDED TO  
RETAIN NUT-BOLT ASSEMBLY.  
SHACKLE BOLT  
SPRING EYE BOLT  
SHOULDER TYPE  
SHACKLE BOLT  
MIN-30 MAX-50  
Lug Nut Torque Requirements  
It is extremely important to apply and maintain proper wheel  
mounting torque on the trailer. Be sure to use only the fasteners  
matched to the cone angle of the wheel. Proper procedure for  
attachment of the wheels is as follows:  
1. Start all wheel lug nuts by hand.  
2. Torque all lug nuts in sequence. See Figure 9. DO NOT  
torquethewheellugnutsallthewaydown.Tighteneachlug  
nut in 3 separate passes as defined byTable 5.  
TABLE 5. TIRE TORQUE REQUIREMENTS  
First Pass  
FT-LBS  
Second Pass  
FT-LBS  
Third Pass  
FT-LBS  
Wheel Size  
12"  
13"  
14"  
15"  
16"  
20-25  
20-25  
20-25  
20-25  
20-25  
35-40  
35-40  
50-60  
50-60  
50-60  
50-65  
50-65  
90-120  
90-120  
90-120  
3. Afterfirstroaduse,retorquealllugnutsinsequence.Check  
all wheel lug nuts periodically.  
Figure 9. Wheel Lug Nuts Tightening Sequence  
NEVER! use an pneumatic air gun  
to tighten wheel lug nuts.  
PAGE 22 — LT-12 SERIES LIGHT TOWER — OPERATION MANUAL — REV. #1 (08/15/08)  
LT-12 SERIES LIGHTTOWER TRAILERWIRING DIAGRAM  
Figure 10. Typical TrailerWiring Diagram  
LT-12 SERIES LIGHT TOWER — OPERATION MANUAL — REV. #1 (08/15/08) — PAGE 23  
LT-12 SERIES LIGHTTOWER — INSPECTION  
Before Starting  
1. Read all safety instructions at the  
beginning of manual.  
2. Cleanthelighttower,removingdirtanddust,  
particularly the engine cooling air inlet and  
aircleaner.  
Figure 11. Dipstick  
3. Check theair filter for dirtanddust. Ifairfilterisdirty,replace  
air filter with a new one as required.  
5. When checking the engine oil, be sure to check if the oil is  
clean. If the oil is not clean, drain the oil by removing the oil  
drain plug, and refill with the specified amount of oil as  
outlined in the Perkins or Lombardini-Deutz Engine  
Owner's Manuals. Oil should be warm before draining.  
4. Check all fastening nuts and bolts for tightness.  
WARNING -Ventillation Requirements  
Ensure adequate ventilation when operating  
the lighttower in enclosed areas. The engine  
exhaust contains noxious elements.  
Indoor Installation  
Exhaust gases from diesel engines are extremely poisonous.  
Whenever an engine is installed indoors the exhaust fumes must  
be vented to the outside.The engine should be installed at least  
two feet from any outside wall. Using an exhaust pipe which is  
too long or too small can cause excessive back pressure which  
will cause the engine to heat excessively and possibly burn the  
valves.  
Eliminate the danger of deadly carbon monoxide gas. Remember  
that exhaust fumes from any gasoline or diesel engine are very  
poisonous if discharged in a closed area. If the light tower is  
installed indoors, you must make provisions for venting the  
engine exhaust to the outside of the building.  
Engine Oil Check  
1. To check the engine oil level, place the make sure the light  
tower is placed on secure level ground with the engine  
stopped.  
2. Remove the filler cap/dipstick from its holder and wipe it  
clean.  
Other types of motor oils may be substituted if they meet the  
following requirements:  
3. Insertandremovethedipstickfromitsholder.Checktheoil  
level shown on the dipstick.  
z
z
z
z
z
API Service Classification CH-4  
API Service Classification CG-4  
API Service Classification CF-4  
ACEA Specification E3  
4. Iftheoillevelislow, addoilthroughtheoilfillerhole,DONOT  
overfill. Fill to the normal operating level as shown on the  
dipstick (Figure 28). Verify that the oil level is maintained  
betweenthetwonotchesasshowninFigure11. Alwaysfill  
with recommended type oil as listed in Table 6. Reference  
Table 2 for engine oil capacity.  
ACEA Specification E2  
PAGE 24 — LT-12 SERIES LIGHT TOWER — OPERATION MANUAL — REV. #1 (08/15/08)  
LT-12 SERIES LIGHTTOWER — INSPECTION  
Battery Check  
Fuel Check  
CAUTION - Diesel Fuel Safety  
WARNING - Battery Safety  
Diesel fuel and its vapors are dangerous  
to your health and the surrounding  
environment. Avoid skin contact and/or  
inhaling fumes. DO NOT smoke while  
refueling.DO NOT attempt to refuel the light  
tower if the engine is hot! or running.  
The operator MUST wear the appropriate  
protective equipment and clothing while  
handling the battery.  
Failure to wear protective equipment or clothing  
could result in SERIOUS INJURY.  
1. To check the engine fuel level, make sure the light tower is  
placed on secure level ground with the engine stopped.  
Battery - The 12-volt DC battery  
(Figure 13) is shipped dry, and will require  
a proper electrolyte level for operation.  
2. Lift the light tower access door (Figure 12) opposite the  
controlpanel.Setthedoorsupportlatchinplacetokeepthe  
door open (up).  
Figure 13. Battery  
When servicing of the battery is required perform the following:  
z
z
z
A face shield and rubber gloves should be worn while  
handling and servicing battery's electrolyte.  
Disconnect battery terminal clamps, and remove the battery  
from the generator cabinet when servicing is required.  
DO NOT overfill the battery.  
WARNING - Battery Service Safety  
Electrolyte is an acid and must be handled with  
caution. Servicing instructions from the electrolyte  
manufacturer must ALWAYS be followed to ensure  
safety. Serious injury can result from careless  
handling and noncompliance to safety handling  
instructions.  
Figure 12. Adding Fuel  
3. RemovethefuelcapfromthefueltankasshowninFigure12.  
CAUTION - Diesel Fuel Safety  
Overfilling the battery may cause the electrolyte to overflow  
resulting in corrosion to nearby components. Immediately wash  
off any spilled electrolyte (battery acid).  
ALWAYS fill the fuel tank with clean, fresh #2 diesel fuel. DO  
NOT fill the fuel tank beyond its capacity. DO NOT  
TOP-OFF.  
Additionally, when connecting the positive (+)  
cable to the battery's positive (+) terminal post,  
DO NOT allow contact of the wrench or any  
metallicparttocomeincontactwiththebattery's  
negative (-) terminal post.This may result in an  
electrical short circuit or an explosion.  
4. Payattentiontothefueltankcapacitywhenreplenishingfuel.  
The fuel tank cap must be closed tightly after filling. Handle  
fuel in a safety container. If the container does not have a  
spout, use a funnel.Wipe up any spilled fuel immediately.  
5. Wipe up any spilled fuel immediately!  
Use only distilled water in the  
battery.Tap water can reduce the  
NOTE  
operating life of the battery.  
LT-12 SERIES LIGHT TOWER — OPERATION MANUAL — REV. #1 (08/15/08) — PAGE 25  
LT-12 SERIES LIGHTTOWER — INSPECTION  
Coolant (Ethylane Glycol [Green] /Water — 50/50 mix)  
Use only drinkable tap water. If hard water or water with many  
impurities is used, the inside of the engine and radiator may  
become coated with deposits and cooling efficiency will be  
reduced.  
When the antifreeze is mixed with  
water, the antifreeze mixing ratio  
must be less than 50%.  
NOTE  
An anticorrosion additive added to the water will help prevent  
deposits and corrosion in the cooling system. See the engine  
manual for further details.  
Cleaning the Radiator  
The engine may overheat if the radiator fins become overloaded  
with dust or debris. Periodically clean the radiator fins with  
compressed air. Cleaning inside the machine is dangerous, so  
clean only with the engine turned off and the negative battery  
terminal disconnected.  
WARNING - Radiator Burn Hazard  
If adding coolant/antifreeze mix to the  
radiator, DO NOT remove the radiator cap  
until the unit has completely cooled. The  
possibility of hot! coolant exists which can  
cause severe burns.  
Air Cleaner  
Periodic cleaning/replacement is necessary. Inspect it in  
accordance with the Perkins, Lombardini or Deutz Engine  
Owner's Manuals.  
Fan Belt Tension  
Day-to-day addition of coolant is done from the recovery tank.  
When adding coolant to the radiator, DO NOT remove the radiator  
cap until the unit has completely cooled.SeeTable 7 for engine  
and radiator, coolant capacities. Make sure the coolant level in  
the recovery tank is always between the "H" and the "L" markings.  
A slack fan belt may contribute to overheating, or to insufficient  
charging of the battery. Inspect the fan belt for damage and wear  
and adjust it in accordance with the Perkins, Lombardini or  
Deutz Engine Owner's Manuals.  
The fan belt tension is proper if the fan belt bends 10 to 15 mm  
(Figure 14) when depressed with the thumb as shown below.  
TABLE 7. COOLANT CAPACITY  
Engine Type  
Perkins 103-10  
Coolant Capacity  
5 qt. (4.7 Liters)  
Lombardini LDW 1003  
DEUTZ F3M1008F  
5.18 qt. (4.9 Liters)  
5.18 qt. (4.9 Liters)  
Figure 14. Fan Belt Tension  
Operation Freezing Weather  
When operating in freezing weather, be certain the proper amount  
of antifreeze (Table 8) has been added.  
WARNING - Rotating Parts Hazard  
NEVER place hands near the belts or fan while the engine is  
running.  
TABLE 8. ANTI-FREEZE  
OPERATING TEMPERATURES  
Freezing Point  
Boiling Point  
Vol %  
Anti-Freeze  
°C  
-24  
-37  
°F  
°C  
°F  
40  
50  
-12  
-34  
106  
108  
222  
226  
PAGE 26 — LT-12 SERIES LIGHT TOWER — OPERATION MANUAL — REV. #1 (08/15/08)  
LT-12 SERIES LIGHTTOWER — INSPECTION  
6. Bottom tower mast is locked in place.  
WARNING - Respiratory Hazard  
7. Light tower trailer support stands have been positioned  
properly and the trailer is level.  
The engine's exhaust contains harmful  
emissions. ALWAYS ventilate the exhaust  
when operating inside tunnels, excavations  
or buildings. Direct exhaust away from  
nearby personnel.  
8. Flood lights have been adjusted to desired position.  
9. Chocked blocks have been positioned under each wheel to  
prevent trailer from rolling.  
10. Flood lights DO NOT interfere with any overhead  
obstructions.  
Before starting the engine perform the following:  
11. Flood light power cables have been plugged into the  
appropriate receptacles (J1-J4) on theT-Bar assembly.  
1. Be sure to disconnect the electrical load and switch the  
main circuit breaker and all lamp (4) circuit breakers to the  
OFF position prior to starting the engine.  
12. Light tower trailer frame has been grounded correctly.  
2. NEVER start the engine with any circuit breakers in the ON  
position.  
DO NOT attempt to start the engine  
3. Make sure light tower is placed on secure level ground  
with chock blocks underneath each wheel to prevent the  
light tower from rolling.  
NOTE  
until all the conditions referenced  
in steps 1 through 12 have been  
met.  
4. Outriggers have been fully extended to prevent the trailer  
from tipping.  
5. All tower mast sections have been raised to the desired  
height.  
DANGER - Overhead Obstruction Danger  
ALWAYS make sure the area  
above Light tower is open and  
clear of overhead power lines  
and other obstructions. The  
tower extends in excess of 30  
ft. (9 meters). Contact with  
overhead powerlines or other  
obstructions could result in  
equipment damage, Serious  
Injury or Death!  
LT-12 SERIES LIGHT TOWER — OPERATION MANUAL — REV. #1 (08/15/08) — PAGE 27  
LT-12 SERIES LIGHTTOWER — STARTUP PROCEDURES  
Starting the Engine  
Starting the Engine (Lombardini/Deutz Engines)  
1. Open the access panel door on the right-side of the light  
tower (opposite the fuel tank). Set the door latch in place to  
hold the door open (up)  
The Night-Hawk LT-12 Series Light Tower is available with two  
types of engines (Perkins or Lombardini/Deutz).The engine start-  
ing procedure contained within this manual will address both  
engines..  
2. Insert the ignition key into the ignition switch (Figure 16).  
Turn the ignition key clockwise one click to the ON position.  
The pre-heat indicator lamp will be lit, wait for this indicator  
lamp to go OFF. When the lamp goes OFF this indicates  
that the glow plugs have been pre-heated and the engine  
can now be started.  
Starting the Engine (Perkins Engines)  
1. Open the access panel door on the right-side of the light  
tower (opposite the fuel tank). Set the door latch in place to  
hold the door open (up)  
2. Insert the ignition key into the ignition switch (Figure 15).  
Turn the ignition key clockwise to the ON position.The pre-  
heat indicator lamp will be lit, wait for this indicator lamp to  
go OFF. When the lamp goes OFF this indicates that the  
glow plugs have been pre-heated and the engine can now  
be started.  
Figure 16. Lombardini/Deutz Ignition Switch  
3. Continue turning the ignition key all the way clockwise, when  
the engine has started, release the key.  
4. Before placing the light tower into actual operation, let the  
engine run for 3-5 minutes. Listen of any abnormal sounds  
or smells that would be associated with a defective light  
tower.If any abnormal conditions occur, shut-down the light  
tower and correct the problem.  
Figure 15. Perkins Ignition Switch  
3. Continue turning the ignition key in a clockwise direction to  
the START position, when the engine has started, release  
the key.  
4. Before placing the light tower into actual operation, let it run  
for 3-5 minutes. Listen of any abnormal sounds or smells  
that would be associated with a defective light tower.If any  
abnormal conditions occur, shut-down the light tower and  
correct the problem.  
PAGE 28 — LT-12 SERIES LIGHT TOWER — OPERATION MANUAL — REV. #1 (08/15/08)  
LT-12 SERIES LIGHTTOWER — SHUTDOWN PROCEDURES  
Normal Shut-down  
Emergency Shut-down  
1. If a load is attached to the generating set of the light tower, 1. Turn the ignition key to the OFF position.  
remove the load.  
2. Set CB-1 thru CB-4 on the control panel to the OFF position.  
3. Place the MAIN circuit breaker (Figure 5, Item 4) on the  
control panel to the OFF position.  
4. Wait a few seconds and observe that flood all floodlights  
are OFF.  
5. Let the engine idle for a few minutes with no load.  
6. Turn the ignition key to the OFF position.Store key in a safe  
location.  
7. Lower light tower mast and place in stow position as outlined  
in the Pre-Setup section of this manual.  
8. Place outriggers in tow position, and remove chock blocks.  
9. Store light tower in a clean, dry location out of the reach of  
children and bystanders.  
Allow flood lights to cool (15  
minutes) if service or removal of  
bulb is required.  
LT-12 SERIES LIGHT TOWER — OPERATION MANUAL — REV. #1 (08/15/08) — PAGE 29  
LT-12 SERIES LIGHTTOWER — MAST OPERATION  
Raising Mast (Top and CenterTower Sections)  
DANGER - Overhead Obstruction Danger  
Once the tower mast has been locked into its vertical position,  
the top and center tower sections can now be raised.These two  
tower sections allow the flood lights to be extended upwards in  
excess of 30 ft.Perform the following steps when extending the  
floodlights:  
ALWAYS make sure the area above Light tower is open and  
clear of overhead power lines and other obstructions. The  
mast extends in excess of 30 ft. (9 meters). Contact with overhead  
powerlines or other obstructions could result in equipment  
damage, Serious Injury or Death!  
1. Locate the "vertical mast extension hand winch", see Figure  
3, Item 2.  
DO NOT stand behind the trailer while the mast is being raised  
or lowered. Serious Injury could result if the mast falls down.  
2. Turn the vertical mast extension hand winch lever clockwise,  
and observe that the flood lights begin to climb upward.  
3. Continue turning the hand winch lever in the clockwise  
direction until the desired height has been reached.  
4. Release the hand winch lever, this winch is of the self-locking  
type.The tension on the cable will keep the mast sections in  
place.  
Outriggers and Support Stands  
Lowering Mast (Top and Center Tower Sections)  
1. Make sure both outriggers are extended. To extend the 1. Turn the vertical mast extension hand winch lever counter-  
outriggers, pull the locking pin on the outrigger and hold  
while sliding out the outrigger assembly.  
clockwise, and observe that the flood lights begin to drop  
downward.  
2. As soon as the pin clears the travel position hole, release it 2. Continue turning the hand winch lever counter-clockwise  
and continue sliding out the outrigger. The pin must snap  
into the outrigger locking hole in the extended position.  
until the top and center mast sections have been fully  
retracted (slack in the cable).  
3. After extending all outriggers, rotate all trailer jack stands Lowering Mast (Lower Lower Section)  
into the foot down position, then turn the crank handle on the  
jack stands clockwise to lower it and level the light tower.  
1. Remove the quick release locking pin to allow the mast  
section to be lowered to the horizontal section. Hold the  
locking pin open until the swivel base tab clears the lock.  
4. Check behind the light tower and make sure all personnel  
and objects are clear of the mast.  
2. Turn the vertical mast hand winch lever counter-clockwise,  
and observe that bottom tower mast begins to approach the  
horizontal position.  
Raising Mast (Lower Mast Section)  
Follow the steps below to raise the lower mast:  
3. Continue turning the vertical hand winch lever in the counter-  
clockwise direction. As the lower tower mast approaches  
the locking cradle, pull the tower release pin to allow the  
tower mast to rest in the cradle.  
1. To release the mast from the support stand locking cradle,  
PULL the large cradle locking pin (see Figure 3, item 9).  
This will unlock the mast from the horizontal position.  
2. Remove the bottom mast quick release locking pin (see  
Figure 3, Item 17) before raising tower to the vertical position.  
4. Once the lower mast is resting in the cradle of the tower  
support stand, align the hole on the mast with the hole on  
the cradle and insert locking pin.  
3. To place the mast in the vertical position, TURN the vertical  
winch hand lever (Figure 3, item 16) clockwise until the  
mast is pointing upwards at 90 degrees.  
4. Once the mast in the vertical position and the mast lock  
captures the swivel base tab, insert the quick release locking  
pin to prevent the mast from falling.  
PAGE 30 — LT-12 SERIES LIGHT TOWER — OPERATION MANUAL — REV. #1 (08/15/08)  
LT-12 SERIES LIGHTTOWER — OPERATION  
Turning On the Flood Lights  
Applying an External Load  
The Night-Hawk LT-12 Series Light Tower is available with two  
auxiliary output receptacles (Figure 18). The upper most  
receptacle (twist-lock) located at the front of the light tower can  
provide 240 VAC at 25 amps.The bottom receptacle is a GFCI  
receptacle which can supply 120VAC at 15 amps.  
The Main Circuit Breaker (25 amps), and 4 floodlight circuit  
breakers (10 amps each) are located on the upper control panel  
(Figure 20). Please note that there is one 10 amp circuit breaker  
for each floodlight.  
1. Place the Main circuit breaker (Figure 17) on the control  
panel to the ON position.  
2. Set CB-1 on the control panel to the ON position.  
3. Wait a few minutes for the ballast to activate. Observe that  
flood light #1 is ON.  
5. Repeat steps 2 and 3 for flood lights 2 through 4 (CB-2  
through 4).  
6. If all the flood light circuit breakers are in the ON position  
(up), then all of the lights should be on.  
7. If any of the flood lights are not ON refer to the troubleshooting  
section of this manual.  
8. CLOSE all cabinet doors.  
Figure 18. 120/240VAC Output Receptacles  
DANGER - Electric Shock Hazards  
WET  
HANDS  
NEVER grab or touch a live power  
cord with wet hands, the possibility  
exists of electrical shock,  
electrocution, and even death!  
POWER  
CORD  
(POWER ON)  
Testing the 120VAC GFCI Receptacle  
Pressing the reset button resets the GFCI receptacle after being  
tripped.Pressing the "Test Button" (See Figure 19) in the center  
of the receptacle will check the GFCI function. Both receptacles  
should be tested at least once  
a month.  
Figure 17. Control Panel Circuit Breakers  
NEVER operate the light tower with  
the engine compartment doors  
Figure19. GFCI TestButton  
open. Operation with the doors  
open may cause insufficient cool-  
ing to the unit, and damage may  
result.  
LT-12 SERIES LIGHT TOWER — OPERATION MANUAL — REV. #1 (08/15/08) — PAGE 31  
LT-12 SERIES LIGHTTOWER — MAINTENANCE  
UseTable 9 shown below as a general checklist to be performed  
on a daily basis. For more detailed maintenance refer to the  
Perkins or Lombardini/Deutz engine service manuals.  
10 Hrs  
DAILY  
200 Hrs  
500 Hrs  
1000 Hrs  
TABLE 9. INSPECTION / MAINTENANCE  
Check Engine Fluid Levels  
Check Fuel Filter  
X
X
X
X
X
Check Air Cleaner Dust Indicator (if equipped)  
Check for Leaks/Visual Walk Around  
Check for Loosening of Parts  
Replace Engine Oil and Filter *1  
Service Battery  
X
X
X
ENGINE  
Clean Unit, Inside and Outside  
Change Fuel Filter *2  
X
X
Clean Radiator and Check Coolant Protection  
Level  
Replace Air Filter Element  
Test Thermostats  
X
X
X
X
Check all Hoses and Clamps/Flush Radiator  
Clean Inside of Fuel Tank  
X
Measure Insulation Resistance Over 3M ohms  
GENERATOR  
1
*
*
Replace engine oil anf filter at 100 hours, first time only.  
Replace fuel filter at 250 Hours, first time only.  
2
PAGE 32 — LT-12 SERIES LIGHT TOWER — OPERATION MANUAL — REV. #1 (08/15/08)  
LT-12 SERIES LIGHTTOWER — MAINTENANCE  
Check CableWear  
Servicing the Mast Extension Cable System:  
The wire rope (cable) that raises and extends the mast is a very To replace the cable in the mast extension cable system, use the  
important part of the light tower.There is one cable/hand winch following steps (Reference Figure 21):  
system, located on the tounge of the trailer, that raises and  
1. Lower the mast to the horizontal resting position.  
extends the light tower mast.There is a second cable/hand winch  
2. Inspect the cable clamps, pulleys, and other components for  
system located on the mast that serves to raise and lower the two  
worn or damaged parts. If either of the cables on the mast  
extendable sections of the mast.  
needs to be replaced, they should both be replaced at the  
same time.  
DANGER - LightTower Cable System Safety  
3. Disassemble the mast by disconnecting the cables form the  
mast and sliding the sections apart.The lower cable can be  
disconnected from the winch.  
Wire rope (cable) will fail if it is worn, frayed, misused, crushed,  
kinked or damaged in any way.ALWAYS check the cables and  
pulleys for any abnormalities before use.  
DO NOT use it if there is even the slightest cause for  
concern and replace any damaged cables or pulleys  
immediately.  
WARNING - Mast Service Safety  
The mast sections are heavy and awkward to handle. Use  
proper lifting devices and procedures when servicing the mast  
and its components.  
Servicing the Mast Raise/Lower Cable System:  
To replace any components in the mast raise/lower cable  
system, use the following steps (Reference Figure 20):  
4. There are two pulleys in the mast raise/lower cable system.  
They should be removed, and replaced if worn or damaged,  
as they can cause premature cable failure if they are in poor  
condition.  
1. Lower the mast to the horizontal resting position.  
2. Inspect the cable clamps, pulleys, and other components for  
worn or damaged parts.  
5. Reassemble the mast extension cable system by connecting  
the cable to the bottom of the upper mast and sliding the  
upper mast into the opening of the center mast. Connect the  
second cable to the bottom of the center mast and slide the  
center mast into the opening of the lower mast, observing  
proper lifting techniques.  
3. Disconnect the cable from the ball socket pin and remove  
from the mast pulley and cable sheave. Detatch the cable  
from the hand winch as necessary.  
4. Replace the pulley and the cable as needed.  
5. Re-thread the cable through the pulley and reattach the cable  
to the ball socket pin.  
6. Route the upper mast cable through the center mast pulley  
and connect the free end of the cable to the lower mast ankle  
shackle. Route the center mast cable through the lower mast  
pulley and connect the free end of the cable to the hand  
winch at the bottom of the lower mast.  
6. Raise and lower the mast several times to verify correct  
operation.  
7. Raise, extend, retract and lower the mast several times to  
verify correct operation.  
LOWER  
MAST  
PULLEY  
LOWER  
MAST  
SHACKLE  
CENTER  
MAST  
PULLEY  
ROUTE TO  
HAND WINCH  
LOWER  
MAST  
CENTER  
MAST  
UPPER  
MAST  
Figure 21 Mast Extension Cable System  
Figure 20. Mast Raise/Lower Cable System  
LT-12 SERIES LIGHT TOWER — OPERATION MANUAL — REV. #1 (08/15/08) — PAGE 33  
LT-12 SERIES LIGHTTOWER — MAINTENANCE  
General Inspection  
Fuel Addition  
Add diesel fuel (the grade may vary according to season and  
locations). Always pour through the mesh filter.  
Prior to each use, the generating set should be cleaned and  
inspected for deficiencies. Check for loose, missing or damaged  
nuts, bolts or other fasteners. Also check for fuel or oil leaks.  
Removing Water from the Tank  
After prolonged use, water and other impurities accumulate in  
the bottom of the tank. Occasionally remove the drain cock and  
drain the contents. During cold weather, the greater the empty  
volume inside the tank, the easier it is for water to condense.  
This can be reduced by always keeping the tank as full as  
possible.  
Air Cleaner  
Every 50 hours: Check dust indicators on control panel. If light is  
ON, clean the air cleaner element.  
1. Un-latch the holding clips and take out the air cleaner  
element.  
2. Clean the inside of the body and cover using a damp cloth.  
Air Removal  
3. Blow dry with compressed air (0.69Mpa {7kgf.cm2,  
99.4 PSI} maximum) against the side of the element along  
the pleats.Then blow dry against outside along the pleats,  
then against inside again.  
If air enters the fuel injection system of a diesel engine, starting  
becomes impossible. After running out of fuel, or after  
disassembling the fuel system, bleed the system according to  
the following procedure.  
To restart after running out of fuel, squeeze the fuel primer bulb  
to pump fuel into the engine. This unit is equipped with an  
automatic air bleeding system.  
4. Remove one seal each time the element is cleaned.  
5. Replace the outer element after cleaning it 6 times or after  
one year. Replace the outer element if indicator is red even  
after cleaning it.  
Service Daily  
If engine is operating in very dusty and dry grass conditions, a  
clogged air cleaner will result in high fuel consumption, loss of  
power and excessive carbon buildup in the combustion chamber.  
6. If seal washer is damaged or the threads of wing nut are  
damaged, replace.  
7. Remove evacuator valve and clean it with compressed air.  
Reinstall.  
Cleaning the Fuel Strainer  
Clean the fuel strainer if it contains dust or water.Remove dust or  
water in the strainer cap and wash it in diesel. Securely fasten  
the fuel strainer cap so that fuel will not leak. Check the fuel  
strainer every 200 hours of operation or once a month.  
Check Oil Level  
Check the crankcase oil level prior to each use, or when the fuel  
tank is filled. Insufficient oil may cause severe damage to the  
engine. Make sure the generator is level. The oil level must be  
between the two notches on the dipstick as shown in Figure 14.  
PAGE 34 — LT-12 SERIES LIGHT TOWER — OPERATION MANUAL — REV. #1 (08/15/08)  
LT-12 SERIES LIGHTTOWER — MAINTENANCE  
14. Drain the water inside reserve tank, clean the inside of the  
reserve tank, then fill with coolant/water mixture to between  
the full and low lines.  
WARNING - Radiator Burn Hazard  
Allow engine to cool when flushing out  
radiator. Flushing the radiator while hot!  
will damage radiator. In addition the  
possibility of hot! coolant exists which can  
cause severe burns.  
15. Stop the engine, wait for 3 minutes, add tap water until the  
water level reaches near the water filer port, then tighten the  
radiator cap.  
Changing Oil  
1. Make sure the oil is cool before changing.  
Flushing Out Radiator and Changing Coolant  
2. Set a container directly under the drain plug of the oil pan.  
Loosen the drain plug slowly.  
1. Stop the engine and allow to cool. Tighten valve of the  
corrosion resistor (if equipped).  
3. Check the drained oil for excessive metal particles or foreign  
material. Contact the distributor if there is metal particles or  
foreign material.  
2. Turn water filer cap slowly and remove it.  
3. Prepare a container to catch the coolant, then open drain  
plug of the radiator or heat exchanger and drain plug of the  
engine, and drain the coolant.  
4. Using a filter wrench, turn filter cartridge to the left to remove  
it. If the filter cartridge is filled with a large amount of oil, wait  
10 minutes or so before removing. Make sure there is no old  
gasket stuck on the filter holder.  
4. After draining the coolant, close drain plugs and fill with tap  
water.  
5. Tighten drain plug. Clean the filter holder, fill the new filter  
cartridge with clean engine oil, coat the packing and thread  
of the new filter cartridge with engine oil, then install it to the  
filter holder. Tighten until the gasket surface contacts the  
seal surface of the filter holder, then tighten it a further 3/4 to  
1 turn.  
5. When the water level is near the mouth of the water filler,  
open drain plugs and start the engine, and run at low idling.  
Keep the engine running at low idling and flush the radiator  
for about 10 minutes.  
6. Adjust the flow of the water flowing in and draining out to  
ensure that the radiator is always full during the flushing  
operation. While flushing water through the system, watch  
carefully the water inlet hose does not come out of the radiator  
filler port.  
6. Add engine oil through oil filler until the oil level is between  
the H and L marks on the dipstick.  
7. Run the engine at idling for a short time, then stop the engine.  
Recheck the oil level and fill as necessary.  
7. After flushing, stop the engine, open drain plug and drain  
the water, then close drain plugs.  
8. After draining the water, flush the system with a flushing  
agent. See instructions on flushing agent label.  
9. After flushing, open drain plugs and drain out all the water,  
then close drain plugs and add tap water so the water level  
is near the mouth of the water filler.  
10. When the water level is near the mouth of the water filler,  
open drain plugs and start the engine, run at low idling and  
continue to flush the system until clean water comes out.  
Adjust the flow of the water flowing in and draining out to  
ensure the radiator is always full during the flushing  
operation.  
11. When clean water comes out, stop the engine, drain all the  
water, then close drain plugs.  
12. Remove the corrosion resistor (if equipped) and open valve.  
13. Supply water until it flows over the water filler.  
LT-12 SERIES LIGHT TOWER — OPERATION MANUAL — REV. #1 (08/15/08) — PAGE 35  
LT-12 SERIES LIGHTTOWER — MAINTENANCE  
Replacing Fuel Filter  
Light Tower Storage:  
1. Set the container under the filter cartridge to catch fuel.  
For storage of the generator for over 30 days, the following is  
required:  
2. Using a filter wrench, turn the filter cartridge to the left to  
remove it.  
z
Fill the fuel tank completely. Treat with fuel stabilizer if  
necessary.  
3. Clean the filter holder, fill the new filter cartridge with fuel,  
coat the packing surface of the filter cartridge with engine  
oil, then install the cartridge to the filter holder.  
z
Completely drain oil from the crankcase and refill if necessary  
with fresh oil.  
4. When installing, tighten until the packing surface contacts  
the seal surface of the filter holder then tighten a further 2/3  
of a turn. If the filter cartridge is tighten too much, the packing  
will be damaged and will cause fuel leakage. Fuel leakage  
will occur if the filter cartridge is not tightened enough. Always  
tighten to the correct angle.  
z
z
Clean the entire light tower, internal and external.  
Disconnect the negative terminals of the battery and cover  
it, or remove it from the generator and store it separately.  
If the ambient temperature is expected to drop below 0oC,  
add antifreeze to the radiator.  
z
z
Cover the light tower and store in a clean, dry place away  
from children and non-qualified personnel.  
5. Squeeze the fuel primer bulb to pump fuel back into the  
engine.  
Removal From Long Term Storage:  
6. Replace Corrosion resistor cartridge (if equipped)  
7. Screw in valves at the top of the corrosion resistor.  
z
Apply oil to the engine valve and rocker arms, and examine  
the operating condition of the valves.  
8. Using a filter wrench, turn the cartridge to the left to  
remove it.  
z
z
z
z
Change the oil in engine oil pan.  
Replace all the filters.  
9. Coat the seal surface of the new cartridge with engine oil  
and install it to the filter holder.  
Flush the inside of the cooling system.  
Drain the water from the fuel tank and bleed the air from the  
fuel system.  
10. Tighten until he packing surface contacts the seal surface of  
the filter holder, then tighten a further 2/3 of a turn.  
z
If the engine has not been started for more than one year,  
contact your Perkins or Lombardini/Deutz distributor to have  
engine overhauled.  
11. Open valves.  
PAGE 36 — LT-12 SERIES LIGHT TOWER — OPERATION MANUAL — REV. #1 (08/15/08)  
LT-12 SERIES LIGHTTOWER TROUBLESHOOTING (GENERATOR)  
Practically all breakdowns can be prevented by proper handling and maintenance inspections, but in the event of a  
breakdown, please take a remedial action following the diagnosis based on the Generator Troubleshooting (Table 10)  
information shown below and on the following page. If the problem cannot be remedied, please leave the unit just as it is  
and consult our company's business office or service plant.  
TABLE 10. GENERATOR TROUBLESHOOTING  
SYMPTOM  
POSSIBLE PROBLEM  
Is wiring connection loose?  
Is voltage regulator defective?  
Defective rectifier?  
SOLUTION  
Check wiring and repair.  
No Voltage Output  
Replace if necessary.  
Check and replace.  
Is engine speed correct?  
Is wiring connections loose?  
Is voltage regulator defective?  
Is wiring connections loose?  
Is voltage regulator defective?  
Short Circuit in load?  
Over current?  
Turn engine throttle lever to "High".  
Check wiring and repair.  
Replace if necessary.  
Check wiring and repair.  
Replace if necessary.  
Check load and repair.  
Confirm load requirements and reduce.  
Check and replace.  
Low Voltage Output  
High Voltage Output  
Circuit Breaker Tripped  
Defective circuit breaker?  
Dead battery?  
Engine fails to start and starter  
does not rotate  
Replace battery.  
Defective ignition switch  
Defective starter?  
Replace ignition switch.  
Replace starter.  
Burned fuse?  
Replace fuse.  
Engine fails to start and starter  
does rotates  
Broken pre-heat circuit?  
No fuel?  
Check pre-heat circuit  
Add fuel (No. 2 diesel fuel)  
Check wiring?  
Defective wiring?  
LT-12 SERIES LIGHT TOWER — OPERATION MANUAL — REV. #1 (08/15/08) — PAGE 37  
LT-12 SERIES LIGHTTOWER TROUBLESHOOTING (ENGINE)  
Practically all breakdowns can be prevented by proper handling and maintenance inspections, but in the event of a  
breakdown, please take a remedial action following the diagnosis based on the EngineTroubleshooting (Table 11) information  
shown below and on the following page. If the problem cannot be remedied, please leave the unit just as it is and consult  
our company's business office or service plant.  
TABLE 11. ENGINE TROUBLESHOOTING  
SYMPTOM  
POSSIBLE PROBLEM  
No fuel?  
SOLUTION  
Replenish fuel.  
Bleed system.  
Air in the fuel system?  
Water in the fuel system?  
Fuel pipe clogged?  
Remove water from fuel tank.  
Clean fuel pipe.  
Fuel filter clogged?  
Clean or change fuel filter.  
Excessively high viscosity of  
fuel or engine oil at low  
temperature?  
Use the specified fuel or engine oil.  
Fuel with low cetane number?  
Use the specified fuel.  
Tighten nut.  
Fuel leak due to loose injection  
pipe retaining nut?  
Engine does not start  
.
Incorrect injection timing?  
Fuel cam shaft worn?  
Adjust.  
Replace.  
Injection nozzle clogged?  
Injection pump malfunctioning?  
Clean injection nozzle.  
Repair or replace.  
Seizure of crankshaft, camshaft,  
piston, cylinder liner or bearing?  
Repair or replace.  
Compression leak from  
cylinder?  
Replace head gasket, tighten cylinder head bolt, glow plug and  
nozzle holder.  
Improper valve timing?  
Piston ring and liner worn?  
Excessive valve clearance?  
Battery discharged?  
Correct or replace timing gear.  
Replace.  
Adjust.  
Charge battery.  
Repair or replace.  
Repair or replace.  
Connect wiring.  
Starter malfunctioning?  
Key switch malfunctioning?  
Wiring disconnected?  
Starter does not run.  
PAGE 38 — LT-12 SERIES LIGHT TOWER — OPERATION MANUAL — REV. #1 (08/15/08)  
LT-12 SERIES LIGHTTOWER TROUBLESHOOTING (ENGINE)  
TABLE 11. ENGINE TROUBLESHOOTING (CONTINUED)  
SYMPTOM  
POSSIBLE PROBLEM  
Fuel filter clogged or dirty?  
Air cleaner clogged?  
SOLUTION  
Clean or change.  
Clean or change.  
Fuel leak due to loose injection  
pipe retaining nut?  
Tighten nut.  
Repair or replace.  
Adjust.  
Injection pump malfunctioning?  
Engine revolution is not  
smooth.  
Incorrect nozzle opening  
pressure?  
Injection nozzle stuck or  
clogged?  
Repair or replace.  
Fuel over flow pipe clogged?  
Governor malfunctioning?  
Excessive engine oil?  
Clean.  
Repair.  
Reduce to the specified level.  
Repair or replace.  
Piston ring and liner worn or  
stuck?  
Either white or blue exhaust gas  
is observed.  
Incorrect injection timing?  
Deficient compression?  
Overload?  
Adjust.  
Adjust top clearance.  
Lessen the load.  
Use the specified fuel.  
Clean or change.  
Clean or change.  
Repair or replace the nozzle.  
Adjust.  
Low grade fuel used?  
Fuel filter clogged?  
Either black or dark gray  
exhaust gas is observed.  
Air cleaner clogged?  
Deficient nozzle injection?  
Incorrect injection timing?  
Engine's moving parts seem to  
be seizing?  
Repair or replace.  
Uneven fuel injection?  
Repair or replace the injection pump.  
Repair or replace the nozzle.  
Deficient output.  
Deficient nozzle injection?  
Replace head gasket, tighten cylinder head bolt, glow plug and  
nozzle holder.  
Compression leak?  
LT-12 SERIES LIGHT TOWER — OPERATION MANUAL — REV. #1 (08/15/08) — PAGE 39  
LT-12 SERIES LIGHTTOWER TROUBLESHOOTING (LAMPS)  
Practically all breakdowns can be prevented by proper handling and maintenance inspections, but in the event of a  
breakdown, useTable 12 shown below and theTroubleshooting Guide as a basic guideline for troubleshooting lamp malfunctions.  
If the problem cannot be remedied, consult our company's business office or service plant.  
TABLE 12. TROUBLESHOOTING LAMPS  
SYMPTOM  
POSSIBLE PROBLEM  
Lamp Burned Out?  
SOLUTION  
Test the lamp in a fixture which is operating properly. Replace as  
necessary.  
Lamp Loose in Socket?  
Inspect lamp base to see if there is arcing at center contact  
button. Tighten lamp snugly. Check socket for damage. Replace  
if defective.  
Floodling Plugs Not Tight?  
Defective Ballast?  
Check plug and receptacle. Tighten if loose.  
Interchange ballast plugs in generator enclosure. if lamp starts,  
replace ballast. Check ballast wiring against diagram. Check for  
swollen capacitor, charred wiring, core and coil or other signs of  
excessive heat.  
Low Voltage?  
Check line voltage at ballast input. Voltage should be within 10%  
of name plate rating when operating at normal load. Increase  
supply voltage or remove external load.  
Lamp will not start.  
Improper Ballast?  
Proper HID lamps will perform erratically or fail to start on an  
improper ballast. The ballast name plate data must agree with the  
line voltage and lamp used. Improper ballast causes lamp failure.  
Note: Mercury lamps of the same wattage will operate properly  
on Metal Halide ballasts.  
Improper Lamp Opertating Position  
(Metal Halide only)?  
Operating position should agree with the lamp tech. A BU-HOR  
lamp can be operated base up vertical to and including the  
horizontal and a BD can be operated base down vertical to,  
approaching, but not including the horizontal. A lamp operated  
beyond the specified position may not start.  
Lamp has been Operating: Cool  
Down Time Insufficient?  
HID lamps (High Pressure Sodium, Metal Halide, Mercury Vapor)  
require from 4 to 8 minutes cool-down time before restarting.  
Switch off breaker and allow lamp to cool.  
Improper Ballast?  
New Lamp?  
Improper ballasting can cause flickering or erratic operation. In  
the start-up period the lamp may ignite, start to warm-up and then  
extinguish (cycle).  
Lamp flickers and goes out  
intermittent or cycling.  
Under certain conditions new lamps may "cycle". Usually after 3  
tries to start at 30 to 60 second intervals, lamps will stabilize and  
operate satisfactorily.  
Defective Lamp?  
Replace lamp.  
PAGE 40 — LT-12 SERIES LIGHT TOWER — OPERATION MANUAL — REV. #1 (08/15/08)  
LT-12 SERIES LIGHTTOWER TROUBLESHOOTING (LAMPS)  
TABLE 12. TROUBLESHOOTING LAMPS (CONTINUED)  
SYMPTOM  
POSSIBLE PROBLEM  
SOLUTION  
Lamp starts slowly (ARC does nt strike Defective Lamp?  
when switch is first turned on)  
Lamp may glow for extended period of time. Replace after  
checking voltage and ballast.  
Circuit breaker trips on lamp start-up  
Short Circuit or Ground?  
Check wiring against diagram. Check for shorts or ground.  
Replace Lamp.  
Normal Lamp Depreciation?  
Dirty Lamp or Fixture?  
Defective Ballast?  
Clean lamp and fixture.  
Interchange ballast plugs in generator encolsure. If lamp returns  
to normal light output, replace ballast. Check for swollen  
capacitators, charred wiring, core and coil, or other signs of  
excessive heat.  
Lamp light output low  
Wrong Voltage?  
Check voltage at ballast input. Voltage should be within 10% of  
nameplate rating. Check wiring connections for voltage loss.  
Check socket contact point.  
Improper Ballast?  
Check ballast nameplate against lamp data.  
Normal Lamp Depreciation?  
Lamp output and brightness decreases and color changes slightly  
as lamps age. Spot replacement with new lamps may cause  
noticeable differences in lamp colors. Group relacement minimizes  
color differences.  
Lamp colors different.  
Dirty Fixture?  
Dirty fixtures will cause lamps to appear different in color. Clean  
fixture.  
Wrong Lamp?  
Check data on lamps whick appear different in color. Replace  
with correct color lamp.  
Over Voltage from Power Supply?  
Improper Ballast?  
Lamp Damaged?  
Check boltage at ballast. Check for current or voltage surges.  
Check for shorted capacitors and replace if defective.  
ARC tube discolored or swollen.  
Lamp operated on ballast designed for higher wattage lamp.  
Check ballast nameplate against lamp data.  
Check for outer bulb cracks. If air enters outer bulb, arc tube may  
continue to burn for 100 hours before failure. Check for bulb  
cracks where glass meets the base due to tightening lamp too  
firmly in socket or scoring of glass where socket inadvertently  
touches the lamp bulb. Look for broken arc tube or loose metal  
parts. Replace lamp. (Bulb leads will cause oxidation of metal  
parts.)  
Short lamp life.  
Improper Ballast?  
Ballast nameplate data should agree with lamp line voltage and  
lamp use. If improper ballast is used, the lamp life will be  
shortened. A mismatch may also cause the ballast to fail.  
LT-12 SERIES LIGHT TOWER — OPERATION MANUAL — REV. #1 (08/15/08) — PAGE 41  
LT-12 SERIES LIGHTTOWER TROUBLESHOOTING (LAMPS)  
TROUBLESHOOTING GUIDE  
Use the following procedure and wiring diagram on the opposite page to determine which of the four floodlights is not functioning:  
Connections:  
1. Make sure that floodlight #1 power cable is plugged into the J1 connector on the T-Bar assembly.  
2. Make sure that floodlight #2 power cable is plugged into the J2 connector on the T-Bar assembly.  
3. Make sure that floodlight #3 power cable is plugged into the J3 connector on the T-Bar assembly.  
4. Make sure that floodlight #4 power cable is plugged into the J4 connector on the T-Bar assembly.  
5. With the voltmeter set to the AC position, connect the negative lead of the AC voltmeter to any (neutral) white wire on  
the junction terminal block. This blocks connects all the neutral wires (white) in the system.  
6. Connect the positive lead of the voltmeter to the output side of CB1, and observe that 120 VAC is present. Make sure  
circuit breaker is ON.  
7. Repeat step 1-6 for CB2 thru CB4.  
8. If the correct output voltages are present for CB1 thru CB4 then it can be assumed that the generator is working  
correctly and the correct voltage (120 VAC) are being supplied to the ballast.  
Starting:  
1. Start the generator and verify that there are no abnormal sounds.  
2. Turn CB1 thru CB4 circuit breakers to the ON position.  
3. Wait a few minutes and determine which flood light is not igniting.  
4. If one of the floodlights is OFF, disconnect its power cable and plug it into a receptacle that is known to be working. DO  
NOT unplug a power cable from theT-Bar while power is being supplied by the generator.Always turn the circuit breaker  
OFF before un-plugging a power cable.  
5. If the floodlight still does not ignite after plugging it into a working receptacle (120VAC present), then it can be assumed  
that the ballast for that flood light is defective. Replace ballast.  
Ballast Removal:  
1. Remove the power cable from the generator or welder, and make sure that no voltage is being supplied to the ballast  
compartment.  
2. Remove the four screws securing the ballast cover, and remove cover.  
3. Make sure to discharge the ballast capacitor.  
3. Remove the defective ballast, taking care to guard against electrical shock when coming in contact with the ballast and  
capacitor. The capacitor is known to store an electrical charge, that when discharged could result in a harmful shock.  
Make sure to discharge capacitor.  
PAGE 42 — LT-12 SERIES LIGHT TOWER — OPERATION MANUAL — REV. #1 (08/15/08)  
LT-12 SERIES LIGHTTOWER — SCHEMATIC DIAGRAM  
Capacitors C1 thru C4 are 480VAC,  
24 f. In addition a 47K (1/2 watt)  
the  
ernal  
LIGHT TOWER SCHEMATIC DIAGRAM  
μ
Ω
NOTE  
LT-12 SERIES LIGHT TOWER — OPERATION MANUAL — REV. #1 (08/15/08) — PAGE 43  
LT-12 SERIES LIGHTTOWER — DEUTZ ENGINEWIRING  
PAGE 44 — LT-12 SERIES LIGHT TOWER — OPERATION MANUAL — REV. #1 (08/15/08)  
LT-12 SERIES LIGHTTOWER — PERKINS ENGINEWIRING  
LT-12 SERIES LIGHT TOWER — OPERATION MANUAL — REV. #1 (08/15/08) — PAGE 45  
OPERATION MANUAL  
HERE’S HOW TO GET HELP  
PLEASE HAVE THE MODEL AND SERIAL  
NUMBER ON-HAND WHEN CALLING  
PARTSDEPARTMENT  
800-427-1244  
310-537-3700  
FAX: 800-672-7877  
FAX: 310-637-3284  
SERVICEDEPARTMENT  
800-478-1244  
310-537-3700  
FAX: 310-537-4259  
TECHNICALASSISTANCE  
800-478-1244  
FAX: 310-631-5032  
WARRANTYDEPARTMENT  
800-421-1244, EXT. 279 FAX: 310-537-1173  
310-537-3700, EXT. 279  
SALESDEPARTMENT  
310-661-4242  
FAX: 310-604-9237  
877-289-7869 (877-BUY-STOW)  
© COPYRIGHT 2008, MULTIQUIP INC.  
Multiquip Inc, and the STOW logo are registered trademarks of Multiquip Inc. and may not be used, reproduced, or altered without written permission. All other  
trademarks are the property of their respective owners and used with permission.  
This manual MUST accompany the equipment at all times. This manual is considered a permanent part of the equipment and should remain with the unit if resold.  
The information and specifications included in this publication were in effect at the time of approval for printing. Illustrations, descriptions, references and technical  
data contained in this manual are for guidance only and may not be considered as binding. Multiquip Inc. reserves the right to discontinue or change specifications,  
design or the information published in this publication at any time without notice and without incurring any obligations.  
Your Local Dealer is:  
MQSTOWCONSTRUCTIONEQUIPMENT  
A DIVISION OF MULTIQUIP INC.  
POST OFFICE BOX 6254  
CARSON, CA 90749  
310-537-3700 • 888-252-MQ STOW [888-  
252-7869]  
Atlanta • Boise • Newark • Quebec, Canada  
Manchester, UK • Rio de Janeiro, BR • Puebla, MX  
FAX: 310-537-1986 • FAX: 800-556-1986  
E-MAIL: MQ [email protected] • WWW:  
stowmfg.com  
P/N: 49103  

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