2-1/2 HP 10 Gallon
125 PSI aIr comPreSSor
model 67708
Set uP and oPeratInG InStructIonS
read this material before using this product.
Failure to do so can result in serious injury.
SaVe tHIS manual.
©
®
Copyright 2010 by Harbor Freight Tools . All rights reserved. No portion of this manual or any artwork
contained herein may be reproduced in any shape or form without the express written consent of
Harbor Freight Tools. Diagrams within this manual may not be drawn proportionally. Due to continuing
improvements, actual product may differ slightly from the product described herein. Tools required for
assembly and service may not be included.
For technical questions or replacement parts, please call 1-800-444-3353.
Manual Revised 10e
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notIce is used to
address practices not
SaVe tHIS manual
Keep this manual for the safety warnings
and precautions, assembly, operating,
inspection, maintenance and cleaning
procedures. Write the product’s serial number
in the back of the manual near the assembly
diagram (or month and year of purchase if
product has no number). Keep this manual
and the receipt in a safe and dry place for
future reference.
related to personal injury.
cautIon, without the
safety alert symbol, is
used to address practices not
related to personal injury.
General compressor Safety
Warnings
WarnInG read all safety warnings
and instructions. Failure to follow
the warnings and instructions may
result in electric shock, fire and/or
serious injury.
ImPortant SaFetY
InFormatIon
In this manual, on the labeling, and
all other information provided with
this product:
Save all warnings and instructions
for future reference.
1. Work area safety
this is the safety alert
symbol. It is used to alert
you to potential personal
injury hazards. obey all
safety messages that follow
this symbol to avoid possible
injury or death.
a. keep work area clean and well lit.
Cluttered or dark areas invite accidents.
b. do not operate the compressor in
explosive atmospheres, such as in
the presence of flammable liquids,
gases or dust. Compressor motors
produce sparks which may ignite the
dust or fumes.
danGer indicates a
hazardous situation
which, if not avoided, will result
in death or serious injury.
c. keep children and bystanders away
from an operating compressor.
2. electrical safety
WarnInG indicates a
hazardous situation
which, if not avoided, could
result in death or serious injury.
a. compressor plugs must match the
outlet. never modify the plug in
any way. do not use any adapter
plugs with grounded compressors.
Standard plugs and matching outlets
will reduce risk of electric shock.
cautIon, used with
the safety alert
symbol, indicates a hazardous
situation which, if not avoided,
could result in minor or moderate
injury.
b. do not expose compressor to rain
or wet conditions. Water entering
a compressor will increase the risk of
electric shock.
c. do not abuse the cord. never
use the cord for unplugging the
SKU 67708
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compressor. keep cord away from
heat, oil, sharp edges or moving
parts. Damaged or entangled cords
increase the risk of electric shock.
instructions for lubricating and
changing accessories. keep dry,
clean and free from oil and grease.
check for misalignment or binding
of moving parts, breakage of parts
and any other condition that may
affect the compressor’s operation.
If damaged, have the compressor
repaired before use. Many accidents
are caused by a poorly maintained
compressor.
3. Personal safety
a. Stay alert, watch what you are
doing and use common sense when
operating this compressor. do
not use this compressor while you
are tired or under the influence of
drugs, alcohol or medication. A
moment of inattention while operating
a compressor may result in serious
personal injury.
e. use the compressor in accordance
with these instructions, taking into
account the working conditions and
the work to be performed. Use of
the compressor for operations different
from those intended could result in a
hazardous situation.
b. use personal protective equipment.
always wear anSI-approved eye
protection during setup and use.
c. Prevent unintentional starting.
ensure the switch is in the off-
position before connecting to power
source or moving the compressor.
5. Service
a. Have your compressor serviced by
a qualified repair person using only
identical replacement parts. This will
ensure that the safety of the compressor
is maintained.
4. compressor use and care
a. do not use the compressor if the
switch does not turn it on and
off. Any compressor that cannot be
controlled with the switch is dangerous
and must be repaired.
air compressor Safety Warnings
1. Risk of fire or explosion - do not
spray flammable liquid in a confined
area or towards a hot surface. Spray
area must be well-ventilated. do not
smoke while spraying or spray where
spark or flame is present. Arcing
parts - keep compressor at least 20
feet away from explosive vapors,
such as when spraying with a spray
gun.
b. disconnect the plug from the
power source before making any
adjustments, changing accessories,
or storing the compressor. Such
preventive safety measures reduce
the risk of starting the compressor
accidentally.
c. Store an idle compressor out of
the reach of children and do not
allow persons unfamiliar with the
compressor or these instructions to
operate it. A compressor is dangerous
in the hands of untrained users.
2. risk of bursting - do not adjust
regulator higher than marked
maximum pressure of attachment.
3. risk of injury - do not direct air
stream at people or animals.
d. maintain the compressor. keep
the compressor clean for better
and safer performance. Follow
4. do not use to supply breathing air.
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5. do not leave compressor unattended
for an extended period while plugged
in. unplug compressor after working.
15. USE OF AN EXTENSION CORD IS NOT
RECOMMENDED. If you choose to
use an extension cord, use the following
guidelines:
6. keep compressor well-ventilated. do
not cover compressor during use.
recommended mInImum WIre
GauGe For eXtenSIon cordS
7. Drain Tank daily and after use. Internal
rust causes tank failure and explosion.
(120 Volt)
eXtenSIon cord
namePlate
amPereS
(at full load)
lenGtH
8. Add correct amount of compressor
oil before first use and every use.
25’
50’ 100’ 150’
0 – 6
18
18
16
14
16
16
16
12
16
14
Operating with low or no oil causes
permanent damage and voids warranty.
6.1 – 10
do not use.
do not use.
do not use.
10.1 – 12
12.1 – 16
table a
9. Do not remove the valve cover or adjust
internal components.
10. Compressor head gets hot during
operation. Do not touch it or allow
children nearby during or immediately
following operation.
a. Make sure your extension cord is in
good condition.
b. Be sure to use an extension cord
which is heavy enough to carry the
current your product will draw. An
undersized cord will cause a drop in line
voltage resulting in loss of power and
overheating. Table A shows the correct
size to use depending on cord length
and nameplate ampere rating. If in
doubt, use the next heavier gauge. The
smaller the gauge number, the heavier
the cord.
11. Do not use the air hose to move the
compressor.
12. Release the pressure in the storage tank
before moving.
13. The use of accessories or attachments
not recommended by the manufacturer
may result in a risk of injury to persons.
14. All air line components, including hoses,
pipe, connectors, filters, etc., must be
rated for a minimum working pressure
of 150 PSI, or 150% of the maximum
system pressure, whichever is greater.
16. Industrial applications must follow OSHA
guidelines.
17. Maintain labels and nameplates on the
compressor. These carry important
safety information. If unreadable or
missing, contact Harbor Freight Tools for
a replacement.
18. This product is not a toy. Keep it out of
reach of children.
19. Operate unit on level surface. Check
oil level daily and fill to marked level if
needed.
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20. People with pacemakers should
consult their physician(s) before use.
Electromagnetic fields in close proximity
to heart pacemaker could cause
pacemaker interference or pacemaker
failure.
proper outlet installed by a
qualified electrician.
110-120 V~ Grounded compressors:
compressors with
three Prong Plugs
21. WARNING: The brass components of
this product contain lead, a chemical
known to the State of California to cause
birth defects (or other reproductive
harm). (California Health & Safety code
§ 25249.5, et seq.)
1. In the event of a malfunction or
breakdown, grounding provides a path
of least resistance for electric current to
reduce the risk of electric shock. This
compressor is equipped with an electric
cord having an equipment-grounding
conductor and a grounding plug. The
plug must be plugged into a matching
outlet that is properly installed and
grounded in accordance with all local
codes and ordinances.
22. The warnings, precautions, and
instructions discussed in this instruction
manual cannot cover all possible
conditions and situations that may occur.
It must be understood by the operator
that common sense and caution are
factors which cannot be built into this
product, but must be supplied by the
operator.
2. Do not modify the plug provided – if it will
not fit the outlet, have the proper outlet
installed by a qualified electrician.
3. Improper connection of the equipment-
grounding conductor can result in a risk
of electric shock. The conductor with
insulation having an outer surface that
is green with or without yellow stripes is
the equipment-grounding conductor. If
repair or replacement of the electric cord
or plug is necessary, do not connect the
equipment-grounding conductor to a live
terminal.
SaVe tHeSe
InStructIonS.
GroundInG
to PreVent
electrIc SHock
and deatH From Incorrect
GroundInG WIre
connectIon:
Check with a qualified electrician
if you are in doubt as to whether
the outlet is properly grounded.
do not modify the power cord
plug provided with the
compressor. never remove the
grounding prong from the plug.
do not use the compressor if the
power cord or plug is damaged.
If damaged, have it repaired by a
service facility before use. If the
plug will not fit the outlet, have a
4. Check with a qualified electrician or
service personnel if the grounding
instructions are not completely
understood, or if in doubt as to whether
the compressor is properly grounded.
5. Use only 3-wire extension cords that
have 3-prong grounding plugs and
3-pole receptacles that accept the
compressor’s plug.
6. Repair or replace damaged or worn cord
immediately.
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Symbology
Pounds per square inch of
pressure
PSI
cFm
ScFm
nPt
Cubic Feet per Minute flow
Grounding
Pin
Cubic Feet per Minute flow at
standard conditions
125 V~ 3-Prong Plug and outlet
National pipe thread, tapered
National pipe thread, straight
Double Insulated
(for up to 125 V~ and up to 15 a)
7. This compressor is intended for use on
a circuit that has an outlet that looks
like the one illustrated above in 125
V~ 3-Prong Plug and outlet. The
compressor has a grounding plug that
looks like the plug illustrated above in
125 V~ 3-Prong Plug and outlet.
nPS
Canadian Standards Association
Underwriters Laboratories, Inc.
Volts Alternating Current
Amperes
8. The outlet must be properly installed and
grounded in accordance with all codes
and ordinances.
V~
a
9. Do not use an adapter to connect this
compressor to a different outlet.
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assembling or making any
adjustments to the compressor.
SPecIFIcatIonS
Electrical
Requirements
120 V~ / 60 Hz / 2.5 HP
note: For additional information regarding the
parts listed in the following pages, refer
to the Assembly Diagram near the end of
this manual.
14A (Dedicated circuit
recommended)
Amperage
1
Air Outlet Size
Air Pressure
/ ” -18 NPT
4
Auto Shut-Off @ 125 PSI
Restart @ 95 PSI
Functions
Air Tank Capacity
Air Flow Capacity
Oil Capacity
10 Gallons
Pressure
Regulator
(74)
Output
Pressure
Gauge
(77)
Tank Pressure
Gauge (53)
Oil Sight
Glass
(33)
5.3 SCFM @ 90 PSI
6.2 SCFM @ 40 PSI
5.5 oz.
Air Compressor Oil
(Sold separately)
(SKU 95048)
ON/OFF
Power
Lever
Oil Type
(On
Sound Level
89 dB @ 1m
Pressure
Switch (54))
Coupler
for
attaching
in-line
Safety
Valve (73)
shutoff
valve, air
hose and
tool
Drain Valve (66)
unPackInG
When unpacking, make sure that the
item is intact and undamaged. If any parts
are missing or broken, please call Harbor
Freight Tools at 1-800-444-3353 as soon as
possible.
(Top View)
oFF
ON/OFF
Power
Lever
Pressure
Switch
(54)
on
Output
Pressure
Gauge
(77)
InStructIonS For PuttInG
Into uSe
Tank Pressure
Gauge (53)
Pressure
Regulator
(74)
read the entIre ImPortant
SaFetY InFormatIon
section at the beginning of this
manual including all text under
subheadings therein before set up
or use of this product.
Figure 1
to PreVent
SerIouS InjurY
From accIdental
oPeratIon:
turn the Power Switch “oFF”
and unplug the air compressor
from its electrical outlet before
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female Quick Coupler and fully open all
regulators and valves.
assembly/mounting
b. Plug in the Power Cord.
Bolt (64)
c. Turn the Power Switch ON.
Wheel (63)
Tank (70)
d. Let the unit run for 30 minutes. Air will
expel freely through the Coupler.
Hex
Nuts
(65)
Bolts (71)
e. Turn the Power Switch OFF.
f. Unplug the Power Cord and remove the
male coupler.
5. Connect a regulator valve, an inline shut
off valve and a 1/4” NPT air hose to the
Quick Coupler (all sold separately). The
air hose must be long enough to reach
the work area with enough extra length
to allow free movement while working.
Wheel (63)
Handle (72)
Bolts (71)
Bolt (64)
Figure 2
1. Attach the Wheels to the Tank, using the
Bolts and Hex Nuts.
note: an in-line shutoff ball valve is an
important safety device because it
controls the air supply even if the air
hose is ruptured. the shutoff valve
should be a ball valve because it can
be closed quickly.
2. Slide the Handle into the two slots on the
top of the Tank and secure in place with
four Bolts.
Cylinder Head (7)
coupler
Plug
coupler
Plug
tool
Quick
coupler
air Hose
on reel
Air Filter
(6)
Shut
off
Valve
oiler
Filter
air
compressor
Figure 3
regulator with
Pressure Gauge
3. Thread the Air Filter onto the side of the
Cylinder Head.
Sample air line Setup
4. Break in the new Air Compressor as
follows:
6. Depending on the tool which you will
be using with this compressor, you
may need to incorporate additional
components, such as an in-line oiler,
a filter, or a dryer (all sold separately).
a. Make sure the Power Switch is OFF
and the unit is unplugged. Insert a
male coupler (sold separately) into the
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Consult your air tool’s manual for needed
accessories.
c. Replace the Oil Plug.
cold Weather operation
checking the oil
Premium quality SAE 30-weight, non-
detergent, air compressor oil (sold
1. Check the oil level before operation.
Fill the Pump Crankcase with premium
quality SAE 30-weight, non-detergent, air
compressor oil (sold separately).
separately) is recommended for use
with this compressor. Start compressor
in heated area if outdoor temperatures
drop below 32° F. If this is not practical,
drain out the old pump oil and use SAE
10W Non-detergent Air Compressor Oil
in the pump crankcase instead whenever
the compressor’s temperature will fall
below 40°. Do not use multi-viscosity
oil (such as 10W-30), they leave carbon
deposits on pump components and lead
to accelerated failure. Heavy operation
may require heavier viscosity oil.
ImPortant: running the air compressor
with the incorrect amount of oil will
cause damage to the equipment
and void the warranty. to prevent
damage, do not use with overfilled
or low oil. Slowly fill to full line, wait
2 minutes and fill back up to full line.
compressor has small passages that
will fill slowly.
Crankcase Cover (31)
Oil Sight Glass (33)
4. If uncertain which oil to use for this
compressor, please call Harbor Freight
Tools customer service at 1-800-444-
3353 for assistance.
OIL LEVEL
5. change the compressor oil after the
oVerFIll
Full
first hour of use to remove any debris.
loW
WarnInG! To prevent serious injury from
burns: Do not add or change the oil while
the compressor is in operation. Allow the
compressor to cool before replacing oil.
Tank (70)
Figure 5
2. The oil level should be at the center of
the “full” level on the oil level sight glass,
as shown in Figure 2. Add oil as needed
to maintain this level. Do not let the
oil level go below the center dot (LOW
as shown above) and do not overfill
the oil so that it is above the center dot
(OVERFILL as shown above) on the
sight glass.
3. To add oil:
a. Remove the Oil Plug.
b. Using a funnel to avoid spills, pour
enough oil into the Pump Crankcase
to reach the “full” level in the Oil Sight
Glass.
reV 10e
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9. Turn the Power Switch ON.
General oPeratInG
InStructIonS
10. Allow the Air Compressor to build up
pressure until it cycles off.
read the entIre ImPortant
SaFetY InFormatIon
section at the beginning of this
manual including all text under
subheadings therein before set up
or use of this product.
note: At the beginning of the day’s first use of
the Air Compressor, check for air leaks
by applying soapy water to connections
while the Air Compressor is pumping
and after pressure cut-out. Look for air
bubbles. If air bubbles are present at
connections, tighten connections. Do
not use the air compressor unless all
connections are air tight, the extra air
leaking out will cause the compressor to
operate too often, increasing wear on the
compressor.
compressor area Set up
1. Designate a work area that is clean and
well-lit. The work area must not allow
access by children or pets to prevent
injury.
2. Locate the Compressor on a flat
level surface to ensure proper pump
lubrication and to prevent damage to the
unit. Keep at least 12” of space around
the unit to allow air circulation.
note: As long as the Power Switch is ON,
the operation of the Air Compressor
is automatic, controlled by an internal
pressure switch. The Compressor
will turn on automatically when the air
pressure drops to 95 PSI as indicated
on the Tank Pressure Gauge (53), and
will turn off automatically when the air
pressure reaches 125 PSI as indicated.
ImPortant: The internal pressure
switch is not user adjustable, do not
make changes to the air pressure
settings of the internal pressure
switch. Any change to the automatic
pressure levels may cause excess
pressure to accumulate, causing a
hazardous situation.
3. Route the power cord from the
compressor to the grounded wall outlet,
along a safe path without creating a
tripping hazard or exposing the power
cord to possible damage.
General operation
1. Close the Drain Valve (66).
2. Make sure all nuts and bolts are tight.
3. Check for oil leaks and check the oil
level (See Checking the Oil).
11. Adjust the Air Compressor’s Pressure
Regulator (74) so that the air output is
enough to properly power the tool, but
the output will not exceed the tool’s
maximum air pressure at any time.
Turn the knob clockwise to increase
the pressure and counter-clockwise to
decrease pressure. Adjust the pressure
gradually, while checking the air output
gauge to set the pressure.
4. Close the in-line Shutoff Valve between
the compressor and the air hose.
5. Make sure the air tool’s throttle or switch
in the off position.
6. Connect the air tool to the air hose.
7. Plug the Air Compressor Power Cord
into a grounded 120 V electrical outlet.
12. Use the air tool as needed.
8. Open the in-line Shutoff Valve.
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13. After the job is complete, turn the Power
Switch OFF.
b. Wait until the Compressor cools down
(about 10 minutes);
c. If the unit does not start up again on it’s
own, press the Reset Button to start the
compressor;
14. Unplug the Air Compressor.
15. Close the in-line Shutoff Valve.
d. Resume operation.
16. Bleed air from the tool then disconnect
the tool.
2. Possible causes of repeated automatic
shut off of the compressor are:
17. Turn the Drain Valve (66), at the bottom
of the Tank, two turns clockwise to
release any built-up moisture and the
internal tank pressure. Close the valve
after moisture has drained out. Do not
remove the Drain Valve.
a. Using an extension cord that is too long
or narrow;
b. An air leak or open hose causing the
compressor to cycle too often and build
up heat.
18. Clean, then store the Air Compressor
indoors.
3. Correct any issues before further use to
avoid damage to the compressor.
emergency depressurization
If it is necessary to quickly depressurize
the Compressor, turn the Power Switch
OFF. Then, pull on the ring on the Safety
Valve (73) to quickly release stored air
pressure.
automatic Shut off System
Reset Button
Figure 4
1. If the Compressor automatically shuts
off:
a. Shut off all tools.
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maintenance Schedule
maIntenance and
SerVIcInG
Following are general guidelines
for maintenance checks of the Air
Compressor.
Procedures not specifically
explained in this manual must
be performed only by a qualified
technician.
note: The environment in which the
compressor is used, and the frequency
of use can affect how often you will need
to check the Air Compressor components
and perform maintenance procedures.
to PreVent
SerIouS InjurY
From accIdental
oPeratIon:
daily:
turn the Power Switch “oFF”
and unplug the compressor from
its electrical outlet before
performing any inspection,
maintenance, or cleaning
procedures.
a. Check oil level.
b. Check for oil leaks.
c. Make sure all nuts and bolts are tight.
d. Drain moisture from air tank.
e. Check for abnormal noise or vibration.
to PreVent SerIouS InjurY
From comPreSSor FaIlure:
do not use damaged equipment.
If abnormal noise or vibration
occurs, have the problem
*
f. Check for air leaks.
g. Wipe off any oil or dirt from the
**
compressor.
corrected before further use.
Weekly:
a. Inspect Air Filter (6).
b. Inspect Oil Breather Plug (37).
cleaning, maintenance, and
lubrication
monthly:
1. beFore eacH uSe, inspect the
general condition of the Air Compressor.
Check for loose hardware, misalignment
or binding of moving parts, damaged
belts, cracked or broken parts, damaged
electrical wiring, and any other condition
that may affect its safe operation.
Inspect Safety Valve (73).
every 6 months or 100 operation Hours:
***
Replace Pump oil.
2. aFter uSe, wipe external surfaces of
the compressor with a clean cloth.
* To check for air leaks, apply soapy water to
joints while the Air Compressor is pressurized.
Look for air bubbles.
3.
WarnInG! If the supply cord
of this compressor is damaged, it
must be replaced only by a qualified
service technician.
** To clean the compressor surface, wipe with
a damp cloth, using a mild detergent or mild
solvent.
*** Use Air Compressor Oil only (sold
separately - SKU 95048).
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a. Make sure the Power switch of the
compressor is off.
oil maintenance
Check the oil periodically for clarity.
Replace oil if it appears milky or if debris
is present, or every 6 months, or 100
hours of runtime, whichever comes first.
In harsh environments such as high heat
or high humidity, you will need to replace
the oil more frequently.
b. Place a collection pan under the Drain
Valve.
c. Unthread the Drain Valve clockwise two
or three turns ONLY.
d. When all the pressure and moisture is
released, close the Drain Valve.
WarnInG: Risk of personal injury hazard.
Allow Air Compressor to cool before
changing the oil.
air Filter maintenance
Check the Air Filter weekly to see if it
needs replacement. If working in dirty
environments, you may need to replace
the filter more often. To replace the Air
Filter:
to drain the oil from the Pump crankcase
(39):
a. Place a container under the Drain Plug
(35).
a. Unthread the Air Filter counterclockwise.
b. Replace with a new Air Filter.
b. Remove the Oil Breather Plug (37) to
allow air flow into the Pump.
c. Remove the Drain Plug, allowing the oil
to drain into the container.
d. When the oil is completely drained from
the Pump, replace the Drain Plug.
e. Fill the Pump with new compressor oil
to the FULL level on the Oil Sight Glass.
f. Replace and tighten the Oil Breather
Plug.
g. Discard the old oil according to local,
state and federal regulations.
draining moisture from the tank
The Drain Valve (66) is located under
the Tank (70). It must be accessed daily
to release all trapped air and moisture
from the Tank. This will eliminate
condensation which can cause tank
corrosion.
note: Do not open the Drain Valve so that
more than four threads are showing.
To empty the air and condensation:
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troubleshooting
Problem
Compressor does
not start or restart
Possible causes
1. Incorrect power supply.
likely Solutions
1. Check that circuit matches compressor requirements.
2. No power at outlet.
2. Reset circuit breaker, or have outlet serviced by a qualified
technician.
3. Power cord not plugged in
properly.
3. Check that cord is plugged in securely.
4. Thermal overload switch
tripped.
4. Turn off Tool. Turn off Compressor and wait for it to cool down.
Press reset button. Resume operation.
5. Building power supply circuit
tripped or blown fuse.
5. Reset circuit or replace fuse. Check for low voltage conditions.
It may be necessary to disconnect other electrical appliances
from the circuit or move the compressor to its own circuit.
6. Tank(s) already pressurized.
6. No problem. Compressor will start when needed.
7. Cord wire size is too small or
cord is too long to properly
power compressor.
7. Use larger diameter or shorter extension cord or eliminate
extension cord. See Recommended Wire Gauge for Extension
Cords in Safety section.
8. Compressor needs service.
1. Incorrect power supply.
8. Have unit inspected by a qualified technician.
1. Check that circuit matches compressor requirements.
Compressor builds
pressure too slowly
2. Crankcase overfilled with oil or 2. Drain oil and refill to proper level with recommended oil.
oil too thick.
3. Working environment too cold. 3. Move unit to a warmer location. Check that recommended oil
is in crankcase.
4. Safety valve needs service.
4. Listen for air leaking from valve. If leaking replace with
identical valve with same rating.
5. Loose fittings.
5. Reduce air pressure, then check all fittings with a soap solution
for air leaks and tighten as needed. Do not overtighten.
Compressor not
building enough air
pressure
1. Filters need cleaning/replacing. 1. Check inlet and outlet filters. Clean and/or replace as needed.
2. Crankcase oil too thick.
2. Drain oil and refill to proper level with recommended oil.
3. Check Valve needs service.
3. Have technician clean or replace, as needed.
4. Compressor not large enough 4. Check if accessory SCFM is met by Compressor. If
for job.
Compressor cannot supply enough air flow (SCFM), you need
a larger Compressor.
5. Loose fittings.
5. Reduce air pressure, then check all fittings with a soap solution
for air leaks and tighten as needed. Do not overtighten.
6. Hose or hose connections not 6. Replace with larger hose and/or hose connections.
adequate.
7. High altitude reducing air
output.
7. You may need a larger compressor if you are situated in a high
altitude location.
High Oil
1. Crankcase oil too thin.
1. Drain oil and refill to proper level with recommended oil.
Consumption
2. Unit not on level surface.
3. Crankcase vent clogged.
2. Reposition unit on a level surface.
3. Clean Crankcase vent.
Follow all safety precautions whenever diagnosing or servicing the
compressor. disconnect power supply before service.
SKU 67708
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Page 15
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Problem
Overheating
Possible causes
likely Solutions
1. Filters need cleaning/replacing. 1. Check inlet and outlet filters. Clean and/or replace as needed.
2. Crankcase oil too thin or
incorrect type.
2. Drain oil and refill to proper level with recommended oil.
3. Crankcase oil level too low.
3. Add oil to proper level, check for leaks.
4. Unusually dusty environment. 4. Clean and/or replace filters more often or move unit to cleaner
environment.
5. Cord is too small of a gauge or 5. Increase cord size or use shorter length extension cord, or
too long to handle compressor.
eliminate extension cord. See Recommended Wire Gauge for
Extension Cords in Safety section.
6. Unit not on level surface.
6. Reposition unit on a level surface.
Compressor
starts and stops
excessively
1. Compressor not large enough 1. Check if accessory SCFM is met by Compressor. If
for job.
Compressor doesn’t reach accessory SCFM, you need a larger
Compressor.
2. Loose fittings.
2. Reduce air pressure, then check all fittings with a soap solution
for air leaks and tighten as needed. Do not overtighten.
Excessive noise
1. Crankcase overfilled with oil
or oil is incorrect thickness or
type.
1. Drain oil and refill to proper level with recommended oil.
2. Crankcase oil level too low.
2. Add oil to proper level, check for leaks.
3. Loose or damaged belt guard. 3. Replace belt guard.
4. Loose fittings.
4. Reduce air pressure, then check all fittings with a soap solution
for air leaks and tighten as needed. Do not overtighten.
5. Unit not on level surface.
Too much moisture in air.
5. Reposition unit on a level surface.
Install inline air filter/dryer, and/or relocate to less humid
environment.
Moisture in
discharge air
Oil in discharge air
1. Crankcase oil too thin or
1. Drain oil and refill to proper level with recommended oil.
crankcase overfilled with oil.
2. Crankcase vents clogged.
2. Clean Crankcase vents.
Safety Valve “pops” Safety valve needs service.
Air leaks from pump Loose fittings.
or fittings
Pull on test ring of safety valve. If it still pops, replace.
Reduce air pressure, then check all fittings with a soap solution for
air leaks and tighten as needed. Do not overtighten.
Have tank replaced by a qualified technician.
Air leaks from tank
Defective or rusted tank.
Follow all safety precautions whenever diagnosing or servicing the
compressor. disconnect power supply before service.
Page 16
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SKU 67708
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PleaSe read tHe FolloWInG careFullY
THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDED THE PARTS LIST AND ASSEMBLY
DIAGRAM IN THIS MANUAL AS A REFERENCE TOOL ONLY. NEITHER THE MANUFACTURER OR
DISTRIBUTOR MAKES ANY REPRESENTATION OR WARRANTY OF ANY KIND TO THE BUYER THAT HE
OR SHE IS QUALIFIED TO MAKE ANY REPAIRS TO THE PRODUCT, OR THAT HE OR SHE IS QUALIFIED
TO REPLACE ANY PARTS OF THE PRODUCT. IN FACT, THE MANUFACTURER AND/OR DISTRIBUTOR
EXPRESSLY STATES THAT ALL REPAIRS AND PARTS REPLACEMENTS SHOULD BE UNDERTAKEN BY
CERTIFIED AND LICENSED TECHNICIANS, AND NOT BY THE BUYER. THE BUYER ASSUMES ALL RISK
AND LIABILITY ARISING OUT OF HIS OR HER REPAIRS TO THE ORIGINAL PRODUCT OR REPLACEMENT
PARTS THERETO, OR ARISING OUT OF HIS OR HER INSTALLATION OF REPLACEMENT PARTS THERETO.
record Product’s Serial number Here:
note: If product has no serial number, record month and year of purchase instead.
note: Some parts are listed and shown for illustration purposes only, and are not available
individually as replacement parts.
SKU 67708
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Page 17
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PartS lISt
Part
description
Qty
1
1
1
8
4
1
1
1
2
1
2
1
1
2
3
1
1
2
1
2
1
1
5
3
Part
description
Qty
1
1
1
1
1
1
1
1
1
1
4
4
4
1
1
1
1
1
1
1
2
2
1
1
2
2
1
2
3
4
5
6
7
8
9
Cover
Elbow
Start Valve
42 Manual Overload Protector
43 Oil Seal
44 Bearing
45 Rotator
46 Bearing
47 Stator
48 Automatic Thermal Protector
49 End Cover
50 Fan
Spring Washer M6
Screw M6 x 50
Air Filter
Cylinder Head
Head Gasket
Valve Plate
10 Metal Gasket
11 Valve
51 Circlip
51a Plain Washer 5
51b Spring Washer 5
51c Bolt
52 Connector
53 Tank Pressure Gauge
54 Pressure Switch
55 Unloader Tube
56 Nut
12 Valve Plate Gasket
13 Cylinder
14 Bolt M8 x 30
15 Spring Washer M8
16 Cylinder Gasket
17 Pin
18 Compression Ring
19 Oil Ring
20 Wrist Pin Retainer
21 Piston
22 Connecting Rod
23 Screw M6 x 20
24 Hex Nut M6
25 Crank Shaft
26 O-Ring
57 Ferrule
58 Check Valve
59 Ferrule
60 Nut
61 Exhaust Tube
62 Cooling Fin
63 Wheel
64 Bolt M12 x 55 (washer/bushing
assembly)
1
2
1
26a Zip Tie
27 Capacitor
1
1
1
1
1
1
1
1
1
1
1
1
1
10
10
65 Hex Nut M12
66 Drain Valve
67 Foot Pad
68 Washer
69 Screw M6 x 25
70 Tank
2
1
2
2
2
1
4
1
1
1
1
1
1
1
28 Screw M8 x 20
29 Capacitor Bracket
30 Hex Nut M8
31 Crank Case Cover
32 O-Ring
33 Oil Sight Glass
34 O-Ring
35 Drain Plug M5 x 10
36 O-Ring
37 Oil Breather Plug
38 Crankcase Cover Gasket
39 Pump Crankcase
40 Washer M5
41 Screw M5 x 16
71 Bolt M6 x 10
72 Handle
73 Safety Valve
74 Pressure Regulator
75 Motor Cord
76 Quick Coupler
77 Output Pressure Gauge
78 Plug
Page 18
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SKU 67708
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aSSemblY dIaGram
SKU 67708
For technical questions, please call 1-800-444-3353.
Page 19
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To take advantage of this warranty,
the product or part must be returned to us
with transportation charges prepaid. Proof
of purchase date and an explanation of the
complaint must accompany the merchandise.
If our inspection verifies the defect, we
will either repair or replace the product at
our election or we may elect to refund the
purchase price if we cannot readily and
quickly provide you with a replacement. We
will return repaired products at our expense,
but if we determine there is no defect, or that
the defect resulted from causes not within the
scope of our warranty, then you must bear the
cost of returning the product.
lImIted 1 Year / 90 daY
WarrantY
Harbor Freight Tools Co. makes every
effort to assure that its products meet
high quality and durability standards, and
warrants to the original purchaser that for
a period of one year from date of purchase
that the tank is free of defects in materials
and workmanship (90 days if used by a
professional contractor or if used as rental
equipment). Harbor Freight Tools also
warrants to the original purchaser, for a
period of ninety days from date of purchase,
that all other parts and components of the
product are free from defects in materials and
workmanship. This warranty does not apply
to damage due directly or indirectly to misuse,
abuse, negligence or accidents, repairs or
alterations outside our facilities, normal wear
and tear, or to lack of maintenance. We
shall in no event be liable for death, injuries
to persons or property, or for incidental,
contingent, special or consequential damages
arising from the use of our product. Some
states do not allow the exclusion or limitation
of incidental or consequential damages,
so the above limitation of exclusion may
not apply to you. THIS WARRANTY IS
EXPRESSLY IN LIEU OF ALL OTHER
WARRANTIES, EXPRESS OR IMPLIED,
INCLUDING THE WARRANTIES OF
This warranty gives you specific legal
rights and you may also have other rights
which vary from state to state.
3491 Mission Oaks Blvd. • PO Box 6009
Camarillo, CA 93011 • (800) 444-3353
MERCHANTABILITY AND FITNESS.
Page 20
For technical questions, please call 1-800-444-3353.
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