Graco Inc Paint Sprayer 230975 User Manual

Instructions – Parts List  
GH 733 Hydra–Sprayr  
Sprayer  
307616Z1  
3500 psi (240 bar, 24 MPa) Maximum Working Pressure  
Model 231733, Series E  
Sprayer only. Has Severe-Duty* Displacement Pump  
Model 230975  
Includes Sprayer 231733, Hose, Swivel, Gun,  
RACr X, DripLesst Tip Guard and SwitchTipt  
*Severe-duty displacement pumps have an abrasion and corrosion-resistant displacement rod and  
sleeve. Refer to the Technical Data in manual 311762.  
Important Safety Instructions  
Read all warnings and instructions in this manual.  
Save these instructions.  
9089c  
GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440–1441  
Copyright 2002, Graco Inc. is registered to I.S. EN ISO 9001  
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WARNING  
SKIN INJECTION HAZARD  
Spray from the gun, leaks or ruptured components can inject fluid into your body and cause extremely  
serious injury, including the need for amputation. Fluid splashed in the eyes or on the skin can also  
cause serious injury.  
D Fluid injected into the skin may look like just a cut, but it is a serious injury. Get immediate surgi-  
cal treatment.  
D Do not point the gun at anyone or at any part of the body.  
D Do not put your hand or fingers over the spray tip.  
D Do not stop or deflect leaks with your hand, body, glove or rag.  
D Do not “blow back” fluid; this is not an air spray system.  
D Always have the tip guard and the trigger guard on the gun when spraying.  
D Check the gun diffuser operation weekly. Refer to the gun manual.  
D Be sure the gun trigger safety operates before spraying.  
D Lock the gun trigger safety when you stop spraying.  
D Follow the Pressure Relief Procedure on page 10 if the spray tip clogs and before cleaning,  
checking or servicing the equipment.  
D Tighten all fluid connections before operating the equipment.  
D Check the hoses, tubes, and couplings daily. Replace worn or damaged parts immediately. Do not  
repair high pressure couplings; you must replace the entire hose.  
D Fluid hoses must have spring guards on both ends, to help protect them from rupture caused by  
kinks or bends near the couplings.  
TOXIC FLUID HAZARD  
Hazardous fluid or toxic fumes can cause serious injury or death if splashed in the eyes or on the skin,  
inhaled, or swallowed.  
D Know the specific hazards of the fluid you are using.  
D Store hazardous fluid in an approved container. Dispose of hazardous fluid according to all local,  
state and national guidelines.  
D Always wear protective eyewear, gloves, clothing and respirator as recommended by the fluid and  
solvent manufacturer.  
FUEL HAZARD  
The fuel used in this unit is combustible and when spilled on a hot surface can ignite and cause a fire.  
D Do not fill the fuel tank while the engine is running or hot.  
EXHAUST HAZARD  
The exhaust contains poisonous carbon dioxide which is colorless and odorless.  
D Do not operate this equipment in a closed building.  
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WARNING  
FIRE AND EXPLOSION HAZARD  
Improper grounding, poor ventilation, open flames or sparks can cause a hazardous condition and  
result in a fire or explosion and serious injury.  
D If there is any static sparking or you feel an electric shock while using this equipment, stop spray-  
ing immediately. Do not use the equipment until you identify and correct the problem.  
D Provide fresh air ventilation to avoid the buildup of flammable fumes from solvents or the fluid  
being sprayed.  
D Keep the spray area free of debris, including solvent, rags, and gasoline.  
D Disconnect all electrical equipment in the spray area.  
D Extinguish all open flames or pilot lights in the spray area.  
D Do not smoke in the spray area.  
D Do not turn on or off any light switch in the spray area while operating or if fumes are present.  
D Do not operate a gasoline engine in the spray area.  
D Ground the sprayer to a true earth ground with the ground wire and clamp (supplied).  
D Use only electrically conductive hoses.  
MOVING PARTS HAZARD  
Moving parts can pinch or amputate your fingers.  
D Keep clear of all moving parts when starting or operating the sprayer.  
D Before servicing the equipment, follow the Pressure Relief Procedure on page 10 to prevent the  
equipment from starting unexpectedly.  
NOTE: This is an example of the DANGER label on your sprayer. This label is available in other languages, free of  
charge. See page 23 to order.  
FIRE AND  
EXPLOSION HAZARD  
SKIN INJECTION  
HAZARD  
Spray painting, flushing or cleaning equipment with flammable  
liquids in confined areas can result in fire or explosion.  
Liquids can be injected into the body by high pressure airless  
spray or leaks – especially hose leaks.  
Use outdoors or in extremely well ventilated areas. Ground  
equipment, hoses, containers and objects being sprayed.  
Avoid all ignition sources such as static electricity from plastic  
drop cloths, open flames such as pilot lights, hot objects such as  
cigarettes, arcs from connecting or disconnecting power cords  
or turning light switches on and off.  
Keep body clear of the nozzle. Never stop leaks with any part of the  
body. Drain all pressure before removing parts.Avoid accidental  
triggering of gun by always setting safety latch when not spraying.  
Never spray without a tip guard.  
In case of accidental skin injection, seek immediate  
“Surgical Treatment”.  
Failure to follow this warning can result in death or serious injury.  
Failure to follow this warning can result in amputation or serious  
injury.  
READ AND UNDERSTAND ALL LABELS AND INSTRUCTION MANUALS BEFORE USE  
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Component Identification  
HYDRAULIC RETURN LINE TO MOTOR  
HYDRAULIC SUPPLY LINE TO MOTOR  
MOTOR RESET BUTTON  
HYDRAULIC MOTOR  
HYDRAULIC  
RESERVOIR  
GASOLINE  
FILL CAP  
SUCTION TUBE  
OUTLET  
FITTING  
PRESSURE  
HYDRAULIC  
PUMP  
DRAIN VALVE  
DISPLACEMENT PUMP  
9089d  
PRESSURE  
CONTROL KNOB  
SUCTION HOSE  
Fig 1  
Setup  
1. Connect the Hose and Gun  
c. Don’t use thread sealant on the swiveling nut  
of the hose couplings, and don’t install the  
spray tip yet.  
a. Remove the plastic cap plug from the outlet  
tee and screw an accessory, conductive or  
grounded spray hose onto the 1/4 npsm(f) out-  
let fitting. See Fig 1.  
NOTE: Use thread sealant on all male threads except at  
swivel unions. Swivel unions are made to self–  
seal, and using thread sealant prevents the  
swivel from turning freely.  
b. Connect a small diameter, 3 ft (0.9 m) whip  
hose between the main hose and a spray gun,  
if desired, for more flexible gun movement.  
2. Fill the Packing Nut/Wet Cup 1/3 full with Graco  
Throat Seal Liquid (TSL), supplied. See Fig. 2.  
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Setup  
3. Check the Hydraulic Oil Level  
GASOLINE  
FILL CAP  
a. Unscrew the hydraulic oil fill cap. See Fig 2.  
The dipstick is attached to the cap. The oil  
should be up to the full line on the dipstick.  
OIL DIPSTICK  
CAUTION  
To prevent damage to the cooling system and  
hydraulic pump, use only Graco Hydraulic Oil,  
169236 (5 gal./20 liter) or 207428 (1 gal/3.8 liter).  
Other types of hydraulic oil may damage the hydrau-  
lic components.  
b. Add oil as needed to the proper level. A  
completely full hydraulic system contains  
about 5 gallons (20 liters) of oil.  
ENGINE OIL  
FILL PLUG  
7872b  
Fig 3  
HYDRAULIC OIL  
PACKING  
FILL CAP  
4. Check the Engine Oil Level  
NUT/ WET  
CUP  
a. Remove the dipstick. See Fig 3.  
b. Check to be sure the oil is up to the full mark  
on the dipstick.  
c. If oil is needed, see the chart below for the  
recommended oil type and weight.  
d. Crank case capacity with filter: 2.1 quarts (2.0  
liters)  
RECOMMENDED LUBRICATION OIL: Use a high  
quality detergent oil of American Petroleum Institute  
(API) service class SG or SH for regular use and for  
breaking in a new engine.  
GRADE OF OIL CHART  
SEASON OR TEMPERATURE  
Spring, Summer, Autumn  
30_F to 0_, Winter  
GRADE OF OIL  
SAE 10W–30  
7871b  
Fig 2  
SAE 5W–20 or 5W–30  
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Setup  
5. Fill the Fuel Tank  
6. Grounding  
WARNING  
FIRE AND EXPLOSION HAZARD  
To reduce the risk of static sparking, fire  
or explosion which can result in serious  
bodily injury and property damage,  
WARNING  
FIRE AND EXPLOSION HAZARD  
Fuel spilled on a hot surface can cause  
a fire or explosion and serious bodily  
injury and property damage. Shut off  
engine and let it cool before filling the  
tank. Carefully follow steps 5.a. to 5.c.,  
below, being sure not to spill any fuel.  
ground the sprayer, all system components, and  
the object being sprayed as instructed under FIRE  
OR EXPLOSION HAZARD on page 3.  
Connect the ground wire and clamp (provided) to a  
true earth ground. See Fig 4.  
a. Close the fuel shutoff valve. See Fig 3.  
b. Use only clean, fresh, well-known brands of  
unleaded regular grade gasoline. The  
minimum octane requirements are 87 octane  
in the U.S.A. and 96 octane elsewhere.  
c. Remove the gasoline fill cap and fill the tank.  
Be sure the air vent in the fill cap is not  
plugged so gasoline can flow to the carburetor,  
then replace the cap. See Fig 3.  
d. External fuel tank capacity: 6.0 gallons (22.7  
liters)  
CLAMP  
e. Gasoline consumption at the maximum oper-  
ating speed of 2900 RPM is about 1.3 gallons/  
hour (4.9 liters/hour).  
7873B  
Fig 4  
7. Flush the sprayer to remove the oil which was left  
in the pump after factory testing to protect the  
pump from corrosion. See Flushing.  
8. Battery Maintenance  
Always charge a new battery or a battery that has not  
been in use for a long period.  
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Flushing  
When to Flush  
4. Changing from oil–base to water–base paint.  
Flush with mineral spirits, followed by soapy water,  
then a clean water flush.  
1. New sprayer. Your new sprayer was factory tested  
with lightweight oil which was left in to protect  
pump parts from corrosion.  
5. Storage.  
Water–base paint: flush with water, then mineral  
spirits and leave the pump, hose and gun filled  
with mineral spirits. Follow the Pressure Relief  
Procedure Warning, page 10.  
Oil–base paint: flush with mineral spirits. Follow  
the Pressure Relief Procedure Warning, page  
10.  
Before using oil–base paint, flush with mineral  
spirits only.  
Before using water–base paint, flush with  
mineral spirits, followed by soapy water, then a  
clean water rinse.  
2. Changing colors. Flush with a compatible solvent  
6. Startup after storage.  
such as mineral spirits.  
Before using water–base paint, flush out mineral  
spirits with soapy water and then clean water.  
When using oil–base paint, flush out mineral  
spirits with fluid to be sprayed.  
3. Changing from water–base to oil–base paint.  
Flush with soapy water, then mineral spirits.  
How to Flush  
8. Turn and hold the ignition key to START until you  
hear the engine “catch”, then release the key to RUN.  
See Fig 5. If the engine does not start, open the  
choke a little (move lever). If the engine floods, open  
the choke all the way and try again.  
WARNING  
SKIN INJECTION HAZARD  
Follow the Pressure Relief Procedure  
Warning on page 10. Remove the spray  
tip before flushing.  
CHOKE  
1. Engage the gun safety latch. Remove the spray tip  
from the gun.  
ON/OFF  
SWITCH  
2. Pour enough clean, compatible solvent to fill the  
pump and hoses into a large, grounded metal pail.  
AIR FILTER  
3. Place the suction tube into the pail or tilt the  
sprayer back (it will support itself) and place the  
pail under the pump. Then tilt the sprayer forward  
to lower the pump into the pail.  
PRESSURE  
CONTROL  
KNOB  
4. Turn the pressure control knob counterclockwise  
until all spring tension is relieved. You will be able  
to feel it. The sprayer is now set at the lowest  
pressure setting. Turning the knob further will  
remove it. Tighten the knob locknut to set. See Fig  
5.  
BYPASS  
VALVE  
7874b  
Fig 5  
5. Open the bypass valve. The valve lever will be  
parallel to the body of the valve. See Fig 5.  
9. After the engine is warm, gradually open the choke  
lever (move lever) and close the bypass valve.  
See Fig 5.  
6. Attach fuel hose from tank to engine.  
10. Point the gun into the grounded metal pail and hold  
a metal part of the gun firmly against the pail.  
7. Close the choke by moving the choke lever. See  
Fig 5.  
NOTE: To save the fluid in the pump and hose, trigger  
the gun into the paint container or a separate  
clean container. At the same time, slowly turn the  
pressure control knob clockwise just enough to  
start the pump. When solvent appears, release  
the trigger and continue as below.  
CAUTION  
The bypass valve must be opened when starting the  
sprayer to prevent damaging the starter.  
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Flushing  
12. Circulate the solvent until the system is thoroughly  
flushed.  
WARNING  
13. Release the trigger and engage the gun safety  
latch.  
FIRE AND EXPLOSION HAZARD  
To reduce the risk of static sparking and  
splashing when flushing, always remove  
the spray tip from the gun and hold a  
metal part of the gun firmly to the side of a  
grounded metal pail.  
14. If you are going to start spraying, place the  
pump or suction tube into the supply container.  
Follow the Pressure Relief Procedure on page  
10. Engage the gun safety latch until you are ready  
to prime the pump. See Step 3, page 9.  
15. If you are going to store the sprayer, be sure  
your final flush is with an oil–based solvent, such  
as mineral spirits. Remove the suction tube or  
pump from the solvent pail. Follow the Pressure  
Relief Procedure on page 10. Engage the gun  
safety latch, but leave the drain valve open.  
11. Making firm metal-to-metal contact, hold the gun  
firmly to the side of the grounded solvent pail.  
Trigger the gun. At the same time, slowly turn the  
pressure control knob clockwise just enough to  
start the pump.  
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Operation  
Pressure Relief Procedure  
2. Starting the Sprayer  
a. Open the bypass valve to make startup easier.  
In the open position, the valve lever is parallel  
to the body of the valve. See Fig 6. Close the  
filter drain valve.  
WARNING  
SKIN INJECTION HAZARD  
The system pressure must be manually  
relieved to prevent the system from  
b. Turn the pressure control knob counterclock-  
wise until all spring tension is relieved. You will  
be able to feel it. The sprayer is now set at the  
lowest pressure setting. Turning the knob fur-  
ther will cause it to fall off.  
starting or spraying accidentally. Fluid  
under high pressure can be injected through the  
skin and cause serious injury. To reduce the risk of  
an injury from injection, splashing fluid, or moving  
parts, follow the Pressure Relief Procedure  
whenever you:  
c. Attach fuel hose from tank.  
d. If the engine is cold, close the choke by mov-  
ing the choke lever. See Fig 6.  
D are instructed to relieve the pressure,  
D stop spraying,  
3. Turn and hold the ignition key to START until you  
hear the engine “catch”, then release the key to  
RUN. See Fig 6. If the engine does not start,  
open the choke a little (move lever). If the engine  
floods, open the choke all the way and try again.  
D check or service any of the system equipment,  
D install or clean the spray tip.  
e. After the engine is warm, gradually open the  
choke lever (move choke lever) and close the  
bypass valve. See Fig 6.  
1. Engage the gun safety latch.  
2. Open the bypass valve.  
CHOKE  
3. Turn the ignition key to OFF.  
ON/OFF  
SWITCH  
4. Disengage the gun safety latch. Hold a metal part  
of the gun firmly to the side of a grounded metal  
pail, and trigger the gun to relieve pressure.  
AIR FILTER  
5. Engage the gun safety latch.  
PRESSURE  
CONTROL  
KNOB  
6. Open the pressure drain valve, having a container  
ready to catch the drainage. Leave the valve open  
until you are ready to spray again.  
BYPASS  
VALVE  
If you suspect that the spray tip or hose is completely  
clogged, or that pressure has not been fully relieved after  
following the steps above, wrap a rag around the tip  
guard retaining nut or hose end coupling and VERY  
SLOWLY loosen the part to relieve pressure gradually,  
then loosen completely. Now clear the tip or hose.  
7874b  
Fig 6  
NOTE: In cold weather, run the engine for about 15  
minutes with the bypass valve open before  
starting the displacement pump, to help avoid  
hydraulic motor stalling.  
f. Follow the Pressure Relief Procedure  
Warning on page 10, to shut off the sprayer.  
1. Prepare the Fluid  
WARNING  
To stop the engine in an emergency, turn OFF  
the ignition key. Close the bypass valve if possible.  
See Fig 6. Then follow the Pressure Relief Proce-  
dure Warning on page 10.  
a. Prepare the fluid according to the fluid manu-  
facturer’s recommendations.  
b. Place the pump or suction tube into the fluid  
container.  
10  
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Operation  
If the motor stalls during operation, turn OFF the igni-  
tion key. With your hand, firmly press straight down on  
the motor reset button. Now try to restart the sprayer. If  
it will not start, refer to the separate motor manual,  
307158.  
CAUTION  
The engine throttle has been set to a maximum of  
3000 RPM. The sprayer warranty will be voided and  
the hydraulic pump life shortened if this adjustment is  
changed.  
CAUTION  
Never use a hammer to depress the reset button, as  
it could cause serious internal motor damage.  
6. Cleaning a Clogged Tip  
WARNING  
4. Prime the Pump  
SKIN INJECTION HAZARD  
To reduce the risk of a fluid injection  
a. Be sure the gun safety latch is engaged.  
b. Don’t install the spray tip yet!  
injury, NEVER hold your hand, body or a  
rag in front of the spray tip when  
c. If the engine has not been started, follow the  
procedure in Step 2., page 10.  
cleaning or checking for a cleared tip. To reduce  
the risk of a fire or explosion, always hold the gun  
firmly against the side of a grounded metal waste  
container when checking to see if the tip was  
cleared or when using a self–clearing tip.  
d. Disengage the gun safety latch.  
e. Point the gun into a grounded metal pail and  
hold a metal part of the gun firmly against the  
pail. See the WARNING below.  
f. Squeeze the trigger and slowly turn the pres-  
sure control knob clockwise just enough to  
start the pump. See Fig 6.  
g. Operate the pump until all air is purged from  
the pump and hoses and the fluid is flowing  
freely from the gun.  
h. Release the trigger and engage the safety  
latch.  
i. Turn the pressure control knob counterclock-  
wise until all spring tension is relieved. You will  
be able to feel it. The sprayer is now at the  
lowest pressure setting. Turning the knob  
further will remove it.  
a. Follow the Pressure Relief Procedure  
Warning on page 10.  
b. Clean the front of the tip frequently during the  
day to keep the fluid from building up and clog-  
ging the tip. To clean, and to clear a tip if it  
clogs, refer to your separate gun instruction  
manual. If you are using the RAC IV tip guard  
and SwitchTip, refer to manual 308644.  
7. Shutting Off the Sprayer  
j. Follow the Pressure Relief Procedure on  
page 10. Then install the spray tip in the gun  
as instructed in the separate gun or tip instruc-  
tion manual. If you are using the RAC IV  
a. Whenever you stop spraying, even for a short  
break, follow the Pressure Relief Procedure  
Warning on page 10.  
supplied with this sprayer, see manual 308644.  
b. Clean the tip and gun as recommended in your  
separate gun or tip manual.  
5. Adjusting the Pressure  
a. Turn the pressure control knob clockwise to  
increase and counterclockwise to decrease the  
pressure. Tighten the knob locknut to set.  
c. Flush the sprayer at the end of each work day  
if using water–based fluid or if it could harden  
in the sprayer over night. See FLUSHING,  
page 8. Use a compatible solvent to flush,  
then fill the pump and hoses with solvent such  
as mineral spirits to help prevent pump corro-  
sion. Relieve pressure!  
b. Always use the lowest pressure that is neces-  
sary to completely atomize the fluid.  
CAUTION  
Operating the sprayer at a higher pressure than  
necessary wastes fluid, causes early tip wear, and  
shortens the sprayer life.  
d. For long term shutdown or storage, always fill  
the sprayer with mineral spirits to prevent  
pump corrosion. Relieve pressure!  
8. Adjusting the Intake Valve Ball Travel.  
a. The pump is set to handle medium volume,  
low viscosity fluid. To adjust the pump for  
higher flow or heavier viscosity fluid, disas-  
semble the intake valve as instructed in  
manual 311762 and move the ball stop pin to a  
higher set of holes. This increases the ball  
travel.  
c. If more coverage is needed, use a larger tip  
rather than increasing the pressure.  
d. Check the spray pattern. The tip size and  
angle determines the pattern width and flow  
rate. See the separate manual received with  
your gun.  
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Maintenance  
1. Always stop the pump at the bottom of its  
9. To change the hydraulic oil:  
stroke when you take a break and at the end of  
the day. This helps keep fluid from drying on the  
rod and damaging the packings.  
a. Follow the Pressure Relief Procedure  
Warning on page 10.  
2. Keep the displacement pump packing nut/wet  
cup 1/3 full of TSL at all times. The TSL helps  
protect the packings and rod.  
b. Place a waste container under the drain plug  
of the hydraulic reservoir. See Fig 7. Unscrew  
the plug and drain the reservoir. Reinstall the  
plug before proceeding.  
3. Check the tightness of the packing nut daily. It  
should be tight enough to stop leakage but no  
tighter.  
c. Remove the nuts and reservoir cover.  
d. Remove the return line filter and install a new  
filter assembly.  
CAUTION  
Proper engine and hydraulic oil level is important to  
prevent costly damage to the sprayer. Check it as  
often as recommended in Steps 4 and 5., below.  
e. Inspect the inlet filter and replace it if needed.  
f. Install the reservoir cover and nuts. Then pour  
in five gallons (19 liters) of Graco Hydraulic Oil  
through the intake filter. See Fig 7. Install the  
fill cap.  
4. Check the hydraulic oil level weekly. The oil  
must be up to the top mark on the dipstick. Use  
only Graco Hydraulic Oil.  
NUTS  
HYDRAULIC  
OIL FILL CAP  
5. Check the engine oil level at least weekly. The  
oil must be up to the FULL mark on the dipstick.  
The engine should not use more than one ounce  
of oil per hour of operation. Consult the engine  
manual, supplied, for additional recommended  
maintenance.  
COVER  
ENGINE  
OIL  
FILL PLUG  
INLET  
FILTER  
6. Inspect the return line filter frequently for clog-  
ging. Replace it after every 500 hours of operation  
or every 6 months, whichever comes first. A  
clogged or worn out filter reduces filter capability  
and will damage the hydraulic pump.  
7. Change the hydraulic oil after every 2000  
hours of operation or every 12 months, whichever  
comes first. For continuous operation in tempera-  
tures above 85_F (30_C), change the oil after  
every 1000 hours or 6 months of use. See Step 9.  
for the procedure.  
CAUTION  
Cleanliness is essential when servicing the hydraulic  
system. Use special care to avoid getting dust or dirt  
into the hydraulic system to prevent damage to the  
hydraulic components.  
RETURN  
LINE  
FILTER  
HYDRAULIC OIL  
DRAIN  
PLUG LOCATED  
UNDER RESERVOIR  
8. Change engine oil and filter every 100 hour of  
use. Use 30W detergent oil.  
Fig 7  
12  
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Troubleshooting  
WARNING  
SKIN INJECTION HAZARD  
To reduce the risk of serious injury,  
whenever you are instructed to relieve  
pressure, follow the Pressure Relief  
Procedure on page 10.  
Check everything in the troubleshooting chart before disassembling the sprayer.  
PROBLEM  
CAUSE  
SOLUTION  
Gas engine doesn’t work properly.  
Gas engine will not start.  
Consult engine manual, supplied.  
Check battery.  
Gas engine operates, but  
displacement pump doesn’t  
operate.  
Hydraulic motor stalled.  
Pressure setting too low.  
Turn the ignition key to OFF. Firmly press  
straight down on motor reset button. Restart  
sprayer, see page 10. If it doesn’t start, see  
manual 307158.  
Increase pressure. See page 11.  
Clean the filter.  
Displacement pump outlet filter (if  
used) is dirty or clogged.  
Tip or tip filter (if used) is clogged.  
Hydraulic fluid too low.  
Remove tip and/or filter and clean.  
Shut off sprayer and add fluid immediately*. See  
page 5.  
Hydraulic pump worn or damaged.  
Hydraulic motor worn or damaged.  
Return sprayer for repair.  
Return sprayer for repair.  
Displacement pump rod seized by  
dried paint.  
Service pump. See manual 311762.  
Displacement pump operates, but Piston ball check not seating properly. Service piston ball check. See manual 311762.  
output is low on upstroke.  
Piston packings worn or damaged.  
Piston packings worn or damaged.  
Replace packings. See manual 311762.  
Replace packings. See manual 311762.  
Displacement pump operates but  
output is low on downstroke and/  
or on both strokes.  
Intake valve ball check not seating  
properly.  
Service intake valve ball check. See manual  
311762.  
Paint leaks into wetcup  
Loose wet–cup  
Tighten just enough to stop leakage.  
Replace packings. See manual 311762.  
Throat packings worn or damaged.  
Excessive leakage around  
Piston rod seal worn or damaged.  
Replace these parts. See manual 307158.  
hydraulic motor piston rod wiper.  
Fluid delivery is low.  
Pressure setting too low.  
Increase pressure. See page 11.  
Clean filter  
Displacement pump outlet filter (if  
used) is dirty or clogged.  
Hydraulic pump is worn or damaged.  
Hydraulic motor is worn or damaged.  
Large pressure drop in fluid hose.  
Return sprayer for repair.  
Return sprayer for repair.  
Use larger diameter hose.  
The sprayer overheats.  
Spitting from gun.  
Cooler or blower is worn or damaged. Replace. See page 15.  
Air in fluid pump or hose.  
Check for loose connections on siphon  
assembly, tighten, then reprime pump.  
Fluid supply is low or empty.  
Refill supply container.  
*Check hydraulic fluid level often. Do not allow it to become too low. Use only Graco approved hydraulic fluid. See pages 5 and 20.  
307616  
13  
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Replacing the Hydraulic Pump  
8. Pull the pump straight off the pump support.  
1. Follow the Pressure Relief Procedure Warning  
on page 10. Let the hydraulic system cool before  
beginning the service procedure.  
9. Loosen the setscrews (108) on the pump half of  
the coupler (109). See Fig 9.  
10. Remove all fittings from the old pump and install  
them on the new pump in the same order.  
2. Unscrew the reservoir drain plug (51), having a  
container ready to catch the draining fluid.  
11. Check Dimension A as shown in Fig 9. When the  
dimension is correct, tighten the setscrews (108),  
slide the new pump assembly onto the pump  
support (117) and recheck the dimension.  
3. Disconnect the hose (7) from the bypass valve (9)  
by loosening the hose clamp (8). See Fig 8.  
4. Loosen the hose clamp (8) and pull the hose (85)  
off the hose insert (5) near the elbow (3). See Fig  
8.  
CAUTION  
The correct coupling dimension is critical to avoid  
improper coupler engagement to the coupler spider  
which will damage the coupler and make the sprayer  
inoperable.  
5. Loosen the hose clamp (54) on the hose (53) just  
above the hydraulic pump (107). See Fig 8.  
6. Loosen the tube fitting nut (18) of hose (22). See  
Fig 8.  
7. Remove the two capscrews (150), lockwashers  
(66) and washers (64) holding the pump (107) to  
the support (117). See Fig 8.  
12. Reconnect the hoses. Reinstall the reservoir plug  
(51), and refill the reservoir with clean, Graco  
approved hydraulic oil.  
113  
85  
112  
117  
8
53  
5
54  
3
52  
152  
4
7
8
7876c  
9
108  
109  
114  
22  
115  
49,66  
107  
150,66,64  
18  
Fig 8  
14  
307616  
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Replacing the Cooler and Blower  
c. Pull the pump support and blower off far  
enough for the blower to fall out of the bottom  
of the housing.  
1. Follow the Pressure Relief Procedure Warning  
on page 10. Let the hydraulic system cool before  
beginning the service procedure.  
d. Install a new blower. Secure the pump support  
(117) to the engine. See Fig 8.  
2. Remove the hydraulic pump as instructed in the  
previous section.  
e. Check Dimension A as shown in Fig 9 and  
tighten the coupler setscrews (108). Butt the  
blower hub up to the coupler half, keeping the  
blower in full contact with the coupler, and  
tighten the blower setscrews (B).  
3. Disconnect the cooler to reservoir return hose (7.)  
by loosening the hose clamp (8). See Fig 8.  
4. Remove the cooler capscrews (49) and lock-  
washers (66). See Fig 8.  
5. Remove the fan guard (23). See Fig 8.  
6. Pull the cooler (115) straight out.  
CAUTION  
The correct coupling dimension is critical to avoid  
improper coupler engagement to the coupler spider  
which will damage the coupler and make the sprayer  
inoperable.  
7. Inspect the rubber pad (116) for wear and replace  
if necessary. See Fig 9.  
8. Inspect the blower wheel (114) for wear. See Fig 8.  
If it needs to be replaced, follow Steps 8a–8e.  
9. Install the cooler.  
a. Unscrew the setscrews (108) from the engine  
half of the coupler (109). Unscrew the blower  
setscrews (B). See Fig 9.  
10. Fold the flaps of the pad (116) toward the cooler  
fins and install the fan guard (23), capscrews (49)  
and lockwashers (66). See Fig 8.  
b. Remove the capscrews (112) and lockwashers  
(113) holding the pump support (117) to the  
engine and pull the support off. See Fig 8.  
11. Reinstall the hydraulic pump and reconnect all  
hoses.  
ENGINE  
108  
115  
23  
117  
A
DIMENSION A  
0.05 in. ± 0.010  
(1.27 mm ± –0.254)  
107  
109  
108  
116  
TOP VIEW  
Fig 9  
307616  
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Displacement Pump Service  
Disconnect the Displacement Pump  
Reconnecting the Displacement Pump  
1. Flush the pump if possible. Stop the pump on the  
down stroke.  
1. Screw the connecting rod (91) into the displace-  
ment rod (A) and replace the lower cotter pin (89).  
Screw the jam nut (90) all the way down. See  
GH733 Sprayer Parts Drawing.  
2. Follow the Pressure Relief Procedure Warning  
on page 10.  
2. Mount the displacement pump (46) onto the tie  
rods (47).  
3. Remove the suction tube and fluid hose from the  
displacement pump.  
3. Screw the shouldered nut (35) onto the hydraulic  
motor (29). Screw the tie rod locknuts (48) onto  
the tie rods (47) and torque to 35–50 ft-lb (47–68  
N.m).  
4. Unscrew the three tie rod locknuts (48). See  
GH733 Sprayer Parts Drawing.  
5. Unscrew the shouldered nut (35). Pull the  
displacement pump (46) off the tie rods (47).  
4. Reattach the hoses to the displacement pump.  
6. Screw the jam nut (90) up onto the connecting rod  
(91).  
5. If the grounding wire was disconnected before  
service, be sure to reconnect it before operating  
the sprayer.  
7. Remove the lower cotter pin (89) and unscrew the  
connecting rod (91) from the displacement rod (A).  
6. Start the pump and operate it slowly to check the  
tie rods for binding. Adjust the tie rod locknuts, if  
necessary to eliminate binding.  
8. Refer to separate manual 311762 for displacement  
pump repair instructions.  
16  
307616  
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Complete Sprayer Parts Drawing  
506 156849  
507 155665  
508 164672  
509 H52503  
.NIPPLE, 3/8 ntp(m)  
3
Model 230975, GH 733 Sprayer  
.ADAPTER, 3/8 npt(m) x 3/8 npsm swivel 1  
Includes items 501 to 510  
.ADAPTER, 1/4 npsm x 3/8 npt(m)  
.HOSE, fluid, nylon, 1/4 in. ID,  
1/4–18 npsm(fbe), 3 ft (0.9 m) long  
.AIRLESS SPRAY GUN  
see manual 309740 for parts  
BUSHING, pipe, 3/4 x 3/8 in.  
1
1
REF  
NO. PART NO.  
DESCRIPTION  
QTY  
501 231733  
GH 733 SPRAYER  
(See parts list on page 19)  
HOSE & GUN KIT,  
includes items 504 to 509  
.HOSE, fluid, nylon, 3/8 in. ID,  
3/8 npsm(fbe); 50 ft (15m) long  
1
510 246240  
511 100505  
1
1
504 218659  
505 H53850  
1
3
*Install this adapter in place of the fluid outlet nipple in the fluid  
filter.  
505  
509  
510  
507  
506  
511  
REF  
39  
508  
505  
505  
506  
REF 38  
See page 18 for  
continuation  
506  
506  
ti10624A  
307616  
17  
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GH733 Sprayer Parts Drawing  
Model 231733, Series D  
82  
30  
29  
79  
77  
76  
E
31  
22  
33  
34  
A
91  
36  
49  
47  
178  
32  
35  
89  
177  
103  
143  
48  
37  
46  
38  
31  
39  
150  
See page 17 for  
continuation  
144  
43  
9086B  
18  
307616  
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GH733 Sprayer Parts Drawing  
187  
182  
183  
88  
124  
LABEL  
LABEL  
83  
1
184  
72  
68  
LABEL  
LABEL  
71  
87  
172  
181  
170  
LABEL  
173  
171  
73  
LABEL  
72  
LABEL  
75  
64  
LABEL  
28  
27  
31  
66  
31  
26  
60  
67  
58  
188  
63  
41  
To Starter  
Switch  
Ref 58  
61  
To Engine  
14  
122  
13  
119  
185  
121  
186  
56  
21  
12  
118  
55  
74  
28  
123  
64  
28  
57  
20  
19  
7877c  
74  
120  
40  
145  
59  
11  
119  
307616  
19  
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GH733 Sprayer Parts Drawing  
Ref 111  
Ref 77  
78  
93  
94  
7879b  
24  
7879A  
Ref 22  
20  
307616  
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GH733 Parts List  
REF  
76  
77  
78  
79  
82  
83  
85  
87  
88  
89  
91  
93  
94  
95  
96  
97  
98  
106053  
513574  
107127  
620188  
105430  
15C712  
178795  
177808  
178935  
244820  
197341  
107125  
105429  
178750  
178794  
500054  
107067  
ELBOW, 90_, 1–1/16 in. thread  
HOSE, hyd rtn, 1 in. x 20.75 in.  
ADAPTER, male, 1–5/16 in. x 3/4 in.  
ADAPTER, 1 in. (m) x 3/4 x 1/2 x 3/8 (f)  
NUT, seal, 1 in. npt  
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
NO. PART NO.  
DESCRIPTION  
QTY  
1
107074  
106114  
107053  
107128  
107050  
178859  
102473  
210658  
165472  
106039  
106123  
100018  
100321  
158979  
188344  
103475  
158491  
107052  
115753  
107069  
101354  
513575  
BREATHER, fill cap  
STRAINER, inlet  
1
1
1
1
3
1
6
1
1
2
4
4
4
1
1
1
1
1
1
1
2
2
3
ELBOW, pipe, 90_, 1/2 x 3/8 npt  
INSERT, hose, 1/2 npt(f)  
HOSE, rubber, 5 in. (125 mm)  
CLAMP, hose  
VALVE, ball 3/8 npt(m)  
ELBOW, pipe, 90_, 3/8 npt(f)  
WHEEL  
CAPSCREW, hex hd, 1/2 x 4 in.  
LOCKWASHER, spring, 1/2 in.  
NUT, hex, 1/2 in. thread  
NIPPLE, pipe, reducing, 3/8 x 1/2 npt  
NIPPLE, pipe, reducing, 3/8 x 1/2 npt  
TEE, pipe, 1/2 npt(f)  
SHIELD, heat  
HOSE, cooler, 0.625 in., 10.5 in. lg  
LABEL, identification  
LABEL, caution  
CLIP, hairpin, with lanyard  
ROD, adapter  
4
TEE, service  
5
7
8
9
10  
11  
12  
13  
14  
15  
15  
16  
17  
18  
19  
20  
21  
22  
ELBOW, 90_ street, 3/4 npt(m)  
NUT, seal, 3/4 npt  
FITTING, return, 1 in. npt(m) x 3/4 npt(f)  
FILTER, fluid  
BUSHING, hex hd  
O–RING, buna–n  
SCREW, mach, hex washer hd, 8 x 3/8 in.1  
KNOB, pump  
103 112798  
105 219099  
106 100187  
107 178872  
108 100421  
109 106063  
110 605358  
111 113287  
112 107143  
113 100052  
114 178792  
115 178788  
116 178861  
117 178786  
118 102169  
119 100016  
120 100011  
122 100015  
123 178787  
130 106229  
131 206994  
132 185016  
137 100004  
138 107032  
139 158683  
140 108426  
141 183574  
142 183575  
143 237686  
144 244683  
145 158233  
150 100505  
167 110838  
168 191958  
169 191959  
170 112179  
171 113819  
172 100022  
173 100016  
174 290320  
176 070401  
177 100101  
1
1
1
2
2
1
1
4
4
1
1
2
1
4
4
2
2
1
1
1
1
NIPPLE, short, 1/2 npt  
FITTING, tube, flared  
BATTERY, 12 volt, “L” style terminals  
CLAMP, battery  
NUT, hex, 5/16 in.  
PUMP, vane, hydraulic  
SETSCREW, 5/16 in. x 3/8 in.  
COUPLER  
PIN, straight, spring  
KEY, 1/4 in.  
HOSE, hydraulic supply, nylon, 3/4 in. ID,  
cpld 1–1/16 in. fbe, 30 in. (762 mm)  
GUARD, fan  
ENGINE, 18 HP, OHC  
CAPSCREW, sch, 7/16 x 1.25 in.  
LOCKWASHER, spring, 7/16 in.  
BLOWER  
1
1
1
1
1
4
23  
24  
25  
26  
27  
28  
29  
178751  
179714  
100213  
217469  
101578  
100214  
217022  
SPACER  
NIPPLE, pipe, 3/8 npt x 3 in.  
FRAME, pump  
COOLER  
PAD  
CAPSCREW, hex head, 8–32 x 0.38 in.  
SUPPORT, pump  
CAPSCREW, hex hd, 5/16 x 1.5  
LOCKWASHER, spring, 1/4 in.  
WING NUT, 1/2 in.  
NUT, hex, 1/4–10 unc  
SHELF, battery  
NIPPLE  
TSL, 8 oz. not shown  
LABEL, Caution  
LOCKWASHER, spring, 5/16 in.  
MOTOR, hydraulic  
see manual 307158 for parts  
LABEL, identification  
18  
1
1
6
2
2
1
1
1
2
1
1
1
1
1
30  
31  
32  
33  
34  
35  
36  
37  
38  
39  
41  
43  
46  
177755  
110838  
106212  
177765  
177652  
244819  
197340  
158586  
111337  
157785  
113952  
245468  
L250C1  
NUT, lock, 5/16–16  
CAPSCREW, 3/8–16 x 2.75 in.  
PLUG  
HANDLE  
COUPLING, assy  
CAPSCREW, hex hd, 3/8–16 in. x 1.25 in. 2  
COUPLING, cover  
ELBOW, 90_ street, 3/8 npt (mxf)  
ELBOW, 90_, 3/8 npt(mxf)  
O–RING, buna–n  
HOSE, rubber tube, 4.5 in.  
NIPPLE, barbed hose, 3/8–18 npt(f)  
GROUND WIRE & CLAMP  
VALVE, pressure drain  
WASHER, flat  
BUSHING, 3/4 x 3/8 in.  
LOCKNUT, 5/16 in.  
BRACKET, switch  
GUARD, muffler  
SCREW, thread forming, (M5 x .8 mm)  
NUT, 1/4 in.  
SCREW, cap, 1/4 in.  
WASHER, lock  
LABEL, identification  
TUBING, electrical, 13 in.  
SCREW, cap, hex hd, 1 x 3/8–16 in.  
unc-2a  
BRACKET, motor, hydraulic  
SPACER  
GUARD, hose  
COUPLING, fuel line  
BRACKET, gas line  
CLAMP, hose  
1
1
1
1
1
1
1
2
1
4
1
1
3
2
4
2
1
1
4
BUSHING, 1 x 3/4 in.  
TEE, 3/4 in. npt(f)  
SWIVEL, 3/4 in. m x f  
CABLE, battery, positive, 23 in., 6 awg  
TUBE, suction, inlet  
PUMP, displacement  
see manual 311762 for parts  
ROD, tie, 14.59 in. (371 mm)  
NUT, lock, type “E” 5/8 in.– 11  
CAPSCREW, hex head, 3/8–16 x 1 in.  
O–RING, fluoroelastomer  
PLUG, box, 3/4 in.  
47  
48  
49  
50  
51  
52  
53  
54  
55  
56  
57  
58  
59  
60  
61  
63  
64  
67  
68  
71  
72  
73  
74  
75  
198592  
101712  
100101  
104444  
104126  
107049  
178791  
101818  
178773  
177641  
177570  
113951  
107068  
15C713  
216141  
246015  
100023  
100678  
3
3
5
1
1
INSERT, hose, 3/4 npt(f)  
HOSE, suction, 1 in. ID, 3 ft (9.9 m)  
CLAMP, hose, 13/16 in. to 1–1/2 in. OD  
LEG, frame  
1
1
2
1
WASHER, flat  
AXLE  
2
1
CABLE, battery, negative, 18 in. , 6 awg  
HOOK, bolt, 1/4 in. thread  
PLATE, engine  
1
1
178 625057  
180 195516  
181 191863  
182 113372  
183 192228  
184 801971  
185 801959  
186 801958  
187 118423  
188 238681  
1
4
1
1
1
2
1
1
1
1
1
SUPPORT, engine  
MOUNT, motor  
WASHER, 3/8 in.  
1
1
14  
4
CAPSCREW, hex hd, 5/16 x 1.75 in.  
290386* LABEL, WARNING  
218125 RESERVOIR KIT  
185951* LABEL, DANGER  
185285* LABEL, DANGER  
100188  
177807  
1
PROTECTOR, terminal black  
PROTECTOR, terminal red  
COVER, debris  
1
1
1
FUEL TANK ASSY, 6 gallon  
NUT, heavy hex, 5/16–18 unc–2a  
LABEL, identification  
10  
1
*DANGER and WARNING labels are available at no charge.  
307616  
21  
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Notes  
22  
307616  
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Technical Data  
Accessories  
Must be purchased separately.  
GRACO–APPROVED HYDRAULIC OIL  
Engine . . . . . . . . . . . . . . . KOHLER Model CH18 OHV 4 cycle  
twin cylinder, air cooled, 18 HP, (13.4 kW)  
Gasoline . . . . . . . . . . . . . . . . . . . 6.0 gallon (22.7 liter capacity)  
consumes 1.3 gal/hr (4.9 liter/hr)  
169236  
207428  
5 Gallons (20 liters)  
1 Gallon (3.8 liters)  
Hydraulic Fluid Sump . . . . . . . . . . . . . . . . . . 5 gallon (19 liters)  
Hydraulic Pressure . . . . . . . . . . . . . . . . . . . . 1300 psi (89 bar)  
10.2 gpm (39 l/min)  
DANGER LABELS  
Displacement Pump . . . . . . . . . . 3500 psi (240 bar, 24 MPa)  
Maximum Working Pressure  
The English language DANGER label shown on  
page 4 is also on your sprayer. If you have painters  
who do not read English, order one of the following  
labels to apply to your sprayer. The drawing below  
shows the best placement of these labels for good  
visibility.  
3 gpm (11.4 lpm) output,  
15 cycles/gallon  
Pump Fluid Outlet Size . . . . . . . . . . . . . . . . . . . . . . . 1 in. npt(f)  
Wetted Parts:  
Displacement Pump . . . . . . . . . . . . . . . . . . . Steel, Nitralloy,  
Tungsten Carbide, PTFE, Leather  
Filter . . . . . . . . . . Aluminum, Carbon Steel, Stainless Steel,  
Weight (dry w/o packaging) . . . . . . . . . . . . . . . 480 lb (217 kg)  
Height . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50.5 in. (1.3 m)  
Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48.5 in. (1.2 m)  
Width . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 in. (736 mm)  
Sound Levels*:  
Order the labels directly from Graco, free of  
charge. Toll Free: 1–800–328–0211  
Sound Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91 dB(A)  
Sound Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106 dB(A)  
* Measured at maximum normal load conditions.  
French  
186956  
Spanish 185961  
German 186041  
Greek  
Korean  
English  
186045  
186049  
185593  
Apply other  
language here  
7871b  
307616  
23  
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Graco Warranty  
Graco warrants all equipment listed in this manual which is manufactured by Graco and bearing its name to be free from defects in  
material and workmanship on the date of sale to the original purchaser for use. With the exception of any special extended or limited  
warranty published by Graco, Graco will, for a period of twelve months from the date of sale, repair or replace any part of the equipment  
determined by Graco to be defective. This warranty applies only when the equipment is installed, operated and maintained in  
accordance with Graco’s written recommendations.  
This warranty does not cover, and Graco shall not be liable for general wear and tear, or any malfunction, damage or wear caused by  
faulty installation, misapplication, abrasion, corrosion, inadequate or improper maintenance, negligence, accident, tampering, or  
substitution of non-Graco component parts. Nor shall Graco be liable for malfunction, damage or wear caused by the incompatibility of  
Graco equipment with structures, accessories, equipment or materials not supplied by Graco, or the improper design, manufacture,  
installation, operation or maintenance or structures, accessories, equipment or materials not supplied by Graco.  
This warranty is conditioned upon the prepaid return of the equipment claimed to be defective to an authorized Graco distributor for  
verification of the claimed defect. If the claimed defect is verified, Graco will repair or replace free of charge any defective parts. The  
equipment will be returned to the original purchaser transportation prepaid. If inspection of the equipment does not disclose any defect  
in material or workmanship, repairs will be made at a reasonable charge, which charges may include the costs of parts, labor, and  
transportation.  
Graco’s sole obligation and buyer’s sole remedy for any breach of warranty shall be as set forth above. The buyer agrees that no other  
remedy (including, but not limited to, incidental or consequential damages for lost profits, lost sales, injury to person or property, or any  
other incidental or consequential loss) shall be available. Any action for breach of warranty must be brought within two (2) years of the  
date of sale.  
GRACO MAKES NO WARRANTY, AND DISCLAIMS ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR  
A PARTICULAR PURPOSE IN CONNECTION WITH ACCESSORIES, EQUIPMENT, MATERIALS OR COMPONENTS SOLD BUT  
NOT MANUFACTURED BY GRACO. These items sold, but not manufactured by Graco (such as electric motors, gas engines,  
switches, hose, etc.), are subject to the warranty, if any, of their manufacturer. Graco will provide purchaser with reasonable assistance  
in making any claim for breach of these warranties.  
In no event will Graco be liable for indirect, incidental, special or consequential damages resulting from Graco supplying equipment  
hereunder, or the furnishing, performance, or use of any products or other goods sold hereto, whether due to a breach of contract,  
breach of warranty, the negligence of Graco, or otherwise.  
FOR GRACO CANADA CUSTOMERS  
The parties acknowledge that they have required that the present document, as well as all documents, notices and legal proceedings  
entered into, given or instituted pursuant hereto or relating directly or indirectly hereto, be drawn up in English. Les parties  
reconnaissent avoir convenu que la rédaction du présente document sera en Anglais, ainsi que tous documents, avis et procédures  
judiciaires exécutés, donnés ou intentés à la suite de ou en rapport, directement ou indirectement, avec les procédures concernées.  
ADDITIONAL WARRANTY COVERAGE  
Graco does provide extended warranty and wear warranty for products described in the “Graco Contractor Equipment Warranty  
Program”.  
Graco Phone Number  
TO PLACE AN ORDER, contact your Graco distributor, or call this number to identify the distributor closest to you:  
1–800–690–2894 Toll Free.  
All written and visual data contained in this document reflect the latest product information available at the time of publication.  
Graco reserves the right to make changes at any time without notice.  
This manual contains English. MM 307616  
Graco Headquarters: Minneapolis  
International Offices: Belgium, China, Japan, Korea  
GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440–1441  
9/1983, Rev 7/2007  
24  
307616  
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