Central Pneumatic Central Pneumatic 30 Gallon, 180 PSI Gas Powered Two-Stage Air... User manual

30 Gallon, 180 PSI
Gas Powered Two-Stage Air Compressor
67853 Air Compressor
Using an engine indoors CAN KILL YOU
IN MINUTES.
Engine exhaust contains carbon monoxide.
This is a poison you cannot see or smell.
NEVER use inside
a home or garage,
EVEN IF doors and
windows are open.
Only use OUTSIDE
and far away from
windows, doors,
and vents.
When unpacking, make sure that the product is intact and undamaged.
If any parts are missing or broken, please call 1-800-444-3353 as soon as possible.
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.
Visit our website at: http://www.harborfreight.com
Email our tech support at: [email protected]
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.
Manual Revised 11e

Page 1
For technical questions, please call 1-800-444 3353.Item 67853
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.
Safety Warnings
In this manual, on the labeling, and all other information
provided with this product:
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.
DANGER indicates a hazardous situation which, if not
avoided, will result in death or serious injury.
WARNING indicates a hazardous situation which, if not
avoided, could result in death or serious injury.
CAUTION, used with the safety alert symbol, indicates
a hazardous situation which, if not avoided, could
result in minor or moderate injury.
NOTICE is used to address practices not related to
personal injury.
CAUTION, without the safety alert symbol, is used to
address practices not related to personal injury.
Symbol Denitions
Symbol Property or Statement
RPM Revolutions Per Minute
HP Horsepower
WARNING marking concerning Risk of Eye
Injury. Wear ANSI-approved safety goggles
with side shields.
Read the manual before set-up and/or use.
WARNING marking concerning Risk of
Hearing Loss. Wear hearing protection.
WARNING marking concerning Risk
of Respiratory Injury. Operate engine
OUTSIDE and far away from windows,
doors, and vents.
WARNING marking concerning Risk of Fire
while handling fuel. Do not smoke while
handling fuel.
WARNING marking concerning Risk of Fire.
Do not refuel while operating.
Keepammableobjectsawayfromengine.
WARNING marking concerning Risk of
Explosion.
WARNING! Read all instructions.
Failure to follow all instructions listed below
may result in re, serious injury and/or DEATH.
The warnings and precautions discussed in this
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.
SAVE THESE INSTRUCTIONS
Set up Precautions
1. Gasolinefuelandfumesareammable,andpotentially
explosive. Use proper fuel storage and handling
procedures.Donotstorefuelorotherammable
materials nearby.
2. HavemultipleABCclassreextinguishersnearby.
3. Operation of this equipment may create sparks that
canstartresarounddryvegetation.Asparkarrestor
may be required. The operator should contact local
reagenciesforlawsorregulationsrelatingtore
prevention requirements.

Page 2 For technical questions, please call 1-800-444 3353. Item 67853
4. Setupanduseonlyonaat,level,
well-ventilated surface.
5. Use only lubricants and fuel recommended in the
enginemanualorintheSpecicationschartof
this manual.
6. Wear ANSI-approved safety goggles, heavy-duty work
gloves, and dust mask/respirator during set up.
Engine Precautions
Follow engine precautions and instructions in the included
engine instruction manual.
Operating Precautions
1. CARBON MONOXIDE HAZARD
Using an engine indoors CAN KILL
YOU IN MINUTES.
Engine exhaust contains carbon
monoxide. This is a poison you cannot
see or smell.
NEVER use inside a home or garage, EVEN IF doors
and windows are open.
Only use OUTSIDE and far away from windows, doors,
and vents.
2. Keep children away from the equipment, especially
while it is operating.
3. FireHazard!DonotllgastankwhileCompressor
engine is running. Do not operate if gasoline has been
spilled. Clean spilled gasoline before starting engine.
Donotoperatenearpilotlightoropename.
4. Do not touch Compressor engine during use. Let
engine cool down after use.
5. Neverstorefuelorotherammablematerialsnear
the Compressor engine.
6. Only use a suitable means of transport and lifting
deviceswithsufcientweightbearingcapacitywhen
transporting the Compressor.
7. Secure the Compressor on transport vehicles to
prevent the tool from rolling, slipping, and tilting.
8. Industrial applications must follow OSHA requirements.
9. Do not leave the equipment unattended when it is
running. Turn off the equipment (and remove safety
keys, if available) before leaving the work area.
10. Wear ANSI-approved safety glasses, hearing
protection, and NIOSH-approved dust mask/respirator
under a full face shield along with steel-toed work boots
during use.
11. People with pacemakers should consult their
physician(s)beforeuse.Electromagneticeldsin
close proximity to a heart pacemaker could cause
pacemaker interference or pacemaker failure. Caution
is necessary when near the engine’s magneto or
recoil starter.
12. Use only accessories that are recommended by Harbor
Freight Tools for your model. Accessories that may
be suitable for one piece of equipment may become
hazardous when used on another piece of equipment.
13. Do not operate in explosive atmospheres, such
asinthepresenceofammableliquids,gases,or
dust. Gasoline-powered engines may ignite the dust
or fumes.
14. Stay alert, watch what you are doing and use common
sense when operating this piece of equipment. Do not
use this piece of equipment while tired or under the
inuenceofdrugs,alcoholormedication.
15. Do not overreach. Keep proper footing and balance at
all times. This enables better control of the equipment
in unexpected situations.
16. Dress properly. Do not wear loose clothing or jewelry.
Keep hair, clothing and gloves away from moving parts.
Loose clothes, jewelry or long hair can be caught in
moving parts.
17. Parts, especially exhaust system components, get very
hot during use. Stay clear of hot parts.
18. Do not cover the engine or equipment during operation.
19. Keep the equipment, engine, and surrounding area
clean at all times.
20. Use the equipment, accessories, etc., in accordance
with these instructions and in the manner intended for
the particular type of equipment, taking into account the
working conditions and the work to be performed. Use
of the equipment for operations different from those
intended could result in a hazardous situation.
21. Do not operate the equipment with known leaks in the
engine’s fuel system.
22. This product contains or, when used, produces a
chemical known to the State of California to cause
cancer and birth defects or other reproductive harm.
(California Health & Safety Code § 25249.5, et seq.)
23. When spills of fuel or oil occur, they must be cleaned
upimmediately.Disposeofuidsandcleaning
materials as per any local, state, or federal codes
and regulations. Store oil rags in a bottom-ventilated,
covered, metal container.

Page 3
For technical questions, please call 1-800-444 3353.Item 67853
24. Keep hands and feet away from moving parts. Do not
reach over or across equipment while operating.
25. Before use, check for misalignment or binding of
moving parts, breakage of parts, and any other
condition that may affect the equipment’s operation.
If damaged, have the equipment serviced before
using. Many accidents are caused by poorly
maintained equipment.
26. Use the correct equipment for the application. Do not
modify the equipment and do not use the equipment for
a purpose for which it is not intended.
Service Precautions
1. Before service, maintenance, or cleaning:
a. Turn the engine switch to its “OFF” position.
b. Allow the engine to completely cool.
c. Then, remove the spark plug cap from the
spark plug.
2. Keep all safety guards in place and in proper working
order.Safetyguardsincludemufer,aircleaner,
mechanical guards, and heat shields, among
other guards.
3. Do not alter or adjust any part of the equipment
or its engine that is sealed by the manufacturer
or distributor. Only a qualied service technician
may adjust parts that may increase or decrease
governed engine speed.
4. Wear ANSI-approved safety goggles, heavy-duty work
gloves, and dust mask/respirator during service.
5. Maintain labels and nameplates on the equipment.
These carry important information. If unreadable
or missing, contact Harbor Freight Tools for
a replacement.
6. Havetheequipmentservicedbyaqualiedrepair
person using only identical replacement parts. This will
ensure that the safety of the equipment is maintained.
Do not attempt any service or maintenance procedures
not explained in this manual or any procedures that
you are uncertain about your ability to perform safely
or correctly.
7. Store equipment out of the reach of children.
8. Follow scheduled engine and equipment maintenance.
Air Compressor Safety Warnings
1. Riskofreorexplosion-Donotsprayammableliquid
inaconnedareaortowardsahotsurface.Sprayarea
must be well-ventilated. Do not smoke while spraying
orspraywheresparkorameispresent.Arcingparts-
Keep compressor at least 20 feet away from explosive
vapors, such as when spraying with a spray gun.
2. Risk of bursting - Do not adjust regulator higher than
maximum stated pressure of attachment.
3. Risk of injury - Do not direct air stream at people
or animals.
4. Do not use to supply breathing air.
5. Do not use the air hose to move the compressor.
6. Drain Tank daily and after use. Internal rust causes
tank failure and explosion.
7. Add correct amount of compressor oil before rst
use and every use. Operating with the incorrect
amount of oil causes permanent damage and voids
warranty. To prevent damage, do not use with
overlled or low oil.
8. Compressor head gets hot during operation. Do not
touch it or allow children nearby during or immediately
following operation.
9. Release the pressure in the storage tank
before moving.
10. The use of accessories or attachments not
recommended by the manufacturer may result in a risk
of injury to persons.
11. All air line components, including hoses, pipe,
connectors,lters,etc.,mustberatedforaminimum
working pressure of 125 PSI, or 150% of the maximum
system pressure, whichever is greater.
SAVE THESE
INSTRUCTIONS.

Page 4 For technical questions, please call 1-800-444 3353. Item 67853
1. Belt Guard - The Belt Guard encloses the pulleys and drive belts.
It protects the user from the moving parts and allows the large
pulley to direct cooling air to the Air Pump.
2. Oil Sight Glass - The oil sight glass shows proper level of the oil.
Oil level should be at center of Sight Glass.
3. Tank Drain Valve - The Air Tank Drain Valve allows moisture to be
removed from the tank to prevent corrosion.
4. Safety Valve - The Safety Valve automatically releases air if the Air
Tank pressure exceeds the preset maximum. In an emergency, the
ring can be pulled to relieve tank air pressure. There is one safety
valve on the pump and one on the tank.
5. Air Outlet - An air hose attaches to this valve. Air pressure
required by tools is set by an air pressure regulator.
6. Air Storage Tank - The Air Tank is where air pressurized by the Air
Pump is stored for use.
7. Tank Pressure Gauge - The Air Tank Pressure Gauge displays the
air pressure in the tank.
8. Pilot Valve - Open the Pilot Valve before starting the engine. It
relieves resistance on the engine to make starting possible. Rotate
the pin so it is vertical to open it. Once the engine is running, close
the Pilot Valve so the Compressor can build up pressure.
Oil Sight Glass (19)
Crankcase (16)
OVERFILL
LOW
FULL
OIL LEVEL
Closed
Pilot Valve
Opened
Pilot Valve
ON/OFF Switch
Tank
Pressure
Gauge (97)
Tank Safety Valve
(98)
Pilot Valve
Air
Outlet
(105)
Drain Valve (137)
Pump Safety Valve (91)
Oil
Sight
Glass
(19)
Belt Guard Frame (121) &
Belt Guard Cover (129) Air Filter
Assembly (84)
Engine Controls
REV 11c

Page 5
For technical questions, please call 1-800-444 3353.Item 67853
Set up
The emission control system for this Compressor’s Engine is warranted for standards set by the U.S. Environmental
Protection Agency and by the California Air Resources Board (also known as CARB). For warranty information, refer to
the engine manual.
Mounting to a Truck bed
1. Before mounting, if needed, reinforce the area with plywood or steel plating.
2. Withassistance,movethecompressortothetruckbedlocationandmarktheoorofthetruckbedthroughtheholes
in the compressor’s feet. Check for any hidden wiring or cables and adjust the location for the holes as needed. Then,
temporarily set the compressor aside.
3. Drill the four 1/2” diameter holes through the truck bed and any reinforcing materials.
4. Set the compressor back in place, and align the foot holes with the pre-drilled holes. Use four 1/2” diameter, bolts,
washers and lock washers (all not included) to secure the compressor in place.
Assembly
ToinstalltheAirFilterAssembly(84),ttheConnectorintothe
Air Filter Assembly and slide the assembly into the hole on the
side of the First Stage Cylinder Head (61). Secure in place with
the Wing Nut.
Break-In Compressor
Break in the new Air Compressor as follows:
a. Make sure the engine is off. Open the air outlet valve on the left side of the tank.
b. Checkalluidlevelsintheengineandpump.
c. Start the engine following the General Operating Instructions.
d. Let the unit run for 30 minutes. Air will expel freely through the Coupler.
e. Turn OFF the engine.
f. Remove the male coupler.
Connection
Connect a regulator valve, an in-line shut off valve and a 1/2” NPT air hose (all sold separately) to the Quick
Coupler. The air hose must be long enough to reach the work area with enough extra length to allow free movement
while working.
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.
1. 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lter,oradryer(allsoldseparately).Consultyourairtool’smanualforneeded
accessories. See Typical Air Line Setup charts on the following pages. This is a truckbed compressor, so use the
portable setup as a model.
Air Filter
Assembly (84)
Wing Nut Connector First Stage
Cylinder Head
(61)
Second Stage
Cylinder Head
(21)

Page 6 For technical questions, please call 1-800-444 3353. Item 67853
Air Tool & Spray Gun Portable Setup
Description Function
A Air Hose Connects air to tool
B Filter Prevents dirt and condensation from damaging tool or work piece
C Regulator Adjusts air pressure to tool D Lubricator (optional) For air tool lubrication
E Coupler and Plug Provides quick connection and release
F Leader Hose (optional) Increases coupler life
G Air Cleaner / Dryer (optional) Prevents water vapor from damaging work piece
H Air Adjusting Valve (optional) Fornetuningairowattool
G
A
E
E H
F
B
Non-lubricated Tools Lubricated Tools
A
B
C
C
DA

Page 7
For technical questions, please call 1-800-444 3353.Item 67853
Air Tool & Spray Gun Stationary Setup
Description Function
A Vibration Pads For noise and vibration reduction
B Anchor Bolts Secures air compressor in place
C Ball Valve Isolates sections of system for maintenance D Isolation Hose For vibration reduction
E Main Air Line - 3/4” minimum recommended Distributes air to branch lines
F Ball Valve To drain moisture from system
G Branch Air Line -1/2” minimum recommended Brings air to point of use
H Filter Prevents dirt and condensation from damaging tool or work piece
I Air Cleaner / Dryer (optional) Prevents water vapor from damaging work piece
J Regulator Adjusts air pressure to tool
K Lubricator For air tool lubrication
L Air Hose Connects air to tool
M Coupler and Plug Provides quick connection and release
NAir Adjusting Valve Fornetuningairowattool
O Leader Hose Increases coupler life
I
M
M N
O
C C
Non-lubricated Tools Lubricated Tools
L
H
H
J
JKL
F
G
E
Slope
F
F
B B
A A
CD

Page 8 For technical questions, please call 1-800-444 3353. Item 67853
Operation
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.
Using the Compressor
Inspect Compressor, engine, pump and equipment looking for damaged, loose, and missing parts before set up and
starting.Ifanyproblemsarefound,donotuseequipmentuntilxedproperly.
Note:Atthebeginningoftheday’srst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.
Before starting the Compressor:
a. Follow the Set Up Instructions in the equipment manual to prepare the equipment.
b. Follow the Set Up Instructions in the Engine manual to prepare the engine.
c. Inspect all components of the setup. Make sure all nuts and bolts are tight.
d. Fill the Engine with the proper amount and type of both fuel and oil.
e. Fill the Compressor Pump with compressor oil following the Maintenance Instructions in
this manual.
To Start and Use the Compressor
1. Close the Drain Valve (137) by turning the lever up so that it
is perpendicular to the valve.
2. Close the in-line Shutoff Valve between the compressor and
the air hose.
3. Open the Pilot Valve by rotating it to a vertical position.
4. Open the Fuel Valve.
3
4
1
2

Page 9
For technical questions, please call 1-800-444 3353.Item 67853
5. To start a cold engine, move the Choke to the CHOKE (start/
closed) position.
To restart a warm engine, leave the Choke in the
RUN position.
6. For MANUAL START
A. Turn the Engine Switch to ON.
B. Grip the Starter Handle of the Engine loosely and pull it
slowlyseveraltimestoallowthegasolinetoowintothe
Engine’s carburetor. Then pull the Starter Handle gently until
resistance is felt. Allow Cable to retract fully and then pull it
quickly. Repeat until the engine starts. Note: Do not let the
Starter Handle snap back against the engine. Hold it as it
recoils so it doesn't hit the engine.
7. Allow the Engine to run for several seconds. Then, if the
Choke lever is in the CHOKE position, move the Choke
Lever very slowly to its RUN position.
Note: Moving the Choke Lever too fast could kill the engine.
8. Close the Pilot Valve by rotating it to a horizontal position.
7
8
5
For ELECTRIC START
Turn the Engine Switch to START.
Note: To prolong starter life, use short starting cycles
(5 seconds maximum). Then wait one minute before
attempting to start again.
ON
OFF START
ON
ON
OFF START START

Page 10 For technical questions, please call 1-800-444 3353. Item 67853
9. When the Gas Engine is started and running, the
compressor Pump starts compressing air into the Air Tank.
Open the in-line Shutoff Valve and adjust the Pressure
Regulator (sold separately) 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 counterclockwise
to decrease pressure. Adjust the pressure gradually, while
checking the air output gauge to set the pressure.
IMPORTANT:Allowtheenginetorunforveminuteswithnoloadaftereachstart-upsothattheenginecanstabilize.
Maintenance Break-in Period:
Breaking-in the engine will help to ensure proper equipment and engine operation. The maintenance break-in period
will last about 20 hours of use. After this period, change the engine oil.
Under normal operating conditions, subsequent maintenance follows the schedule explained in the MAINTENANCE
AND SERVICING section.
Note: When maximum tank pressure is reached, the compressor automatically disengages, and the engine RPM drops
down to idle speed. The engine remains at idle until Air Tank pressure falls to a preset level. The Gas Engine will then
accelerate and air pressure once again begins to build up in the Air Tank.
Note: As long as the engine is running, the operation of the Air Compressor is automatic, controlled by an internal
pressure switch.
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.
Note: Depressurization - If it is necessary to quickly depressurize the Compressor, turn OFF the engine. Then, pull on
the ring on the tank Safety Valve to release stored air pressure.
10. Use the air tool as needed.
11. After the job is complete, turn OFF the engine.
To stop the engine in an emergency, turn the Engine Switch off.
Under normal conditions, use the following procedure:
a. Turn the Engine Switch off.
b. Close the Fuel Valve.
9
OFF
ON
OFF START
10
11

Page 11
For technical questions, please call 1-800-444 3353.Item 67853
12. Close the in-line Shutoff Valve.
13. Bleed air from the tool then disconnect the tool.
14. Open the Drain Valve at the bottom of the Tank, to release
any built-up moisture and the internal tank pressure.
15. Clean, then store the Air Compressor indoors.
12
13
14

Page 12 For technical questions, please call 1-800-444 3353. Item 67853
Maintenance
WARNING
TO PREVENT SERIOUS INJURY FROM ACCIDENTAL
STARTING:
Turn the Power Switch of the equipment to its “OFF”
position, release tank air pressure, wait for the engine
to cool, and disconnect the spark plug cap before
performing any inspection, maintenance, or cleaning
procedures.
TO PREVENT SERIOUS INJURY FROM EQUIPMENT
FAILURE:
Do not use damaged equipment. If abnormal noise,
vibration, or excess smoking occurs, have the problem
corrected before further use.
Follow all service instructions in this manual. The
engine may fail critically if not serviced properly.
Maintenance Procedures
Many maintenance procedures, including any
not detailed in this manual, will need to be
performed by a qualied technician for safety.
If you have any doubts about your ability to
safely service the equipment or engine, have
a qualied technician service the equipment
instead.
Compressor Pump Oil
Maintenance
Check 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rst.Inharsh
environments such as high heat or high humidity, you
will need to replace the oil more frequently.
Change the compressor oil after the rst hour of
use to remove any debris.
Adding Oil
1.
Oil Sight Glass (19)
Crankcase (16)
OVERFILL
LOW
FULL
OIL LEVEL
The oil level should be at the center of the “full” level
on the Oil Sight Glass, as shown above. 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overlltheoilsothatitisabovethecenterdot
(OVERFILL as shown above) on the Oil Sight Glass.
2. To add oil:
a. Remove the Oil Plug (17).
b. Using a funnel to avoid spills, pour enough oil into
the pump Crankcase to reach the “full” level in the
Oil Sight Glass.
c. Replace the Oil Plug.
Cold Weather Operation
Premium quality 30-weight, non-detergent air
compressor oil (sold 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.
3. If uncertain which oil to use for this compressor,
please call Harbor Freight Tools customer service at
1-800-444-3353 for assistance.
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.

Page 13
For technical questions, please call 1-800-444 3353.Item 67853
Changing Oil
To drain the oil from the Pump Crankcase:
a. Place a container under the Drain Plug.
b. RemovetheOilPlugtoallowairow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 Plug.
g. Discard the old oil according to local, state and
federal regulations.
Draining Moisture from the Tank
The Drain Valve is located under the Tank. It must be
accessed daily to release all trapped air and moisture
from the Tank. This will eliminate condensation which
can cause tank corrosion.
To empty the air and condensation:
a. Make sure the compressor engine is off.
b. Place a collection pan under the Drain Valve.
c. Open the Drain Valve by pivoting the lever on the
bottom of the Compressor so the lever is in line with
the Drain Valve.
d. When all the pressure is released, close the
Drain Valve by pivoting the lever on the bottom of
the compressor so that the lever is perpendicular to
the Drain Valve.
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ltermoreoften.Toreplacethe
Air Filter:
a. Unthread the Wing Nut holding the Air Filter
Assembly in place.
b. Remove the Air Filter Assembly.
c. Replace with a new Air Filter.
d. Secure in place with the Wing Nut.
Adjusting Belt Tension
1. Remove the Belt Guard Cover (129) and set it aside.
2.
Deection
Distance
Press on the center of the longest span on each
beltwithmoderatengerpressure(4-4.5lb.).Then
measurethedeectiondistance,thedistancethatthe
beltmoved.Thebeltshoulddeectanywherefrom
1/2” to 1”.
3.
Bottom Plate (114)
Nut (115)
Threaded Rod
(118)
Bolts (110)
Engine
Mounting
Bolts
Engine Base
If either belt deects too much, tighten belts by
loosening the four Bolts (110) on the Bottom Plate (114)
and moving the engine away from the other pulley
slightly by turning the Nut (115) holding the Threaded
Rod (118). Secure engine mounting bolts and retest
tension. If either belt is too long to be properly
tensioned, both belts must be replaced.
4. If either belt deects too little, loosen belts by
loosening the Bolts on the Bottom Plate and moving the
engine towards the other pulley slightly by turning the
Nut (115) on the Threaded Rod (118). Secure engine
mounting bolts and retest tension.
5. Before use, replace belt cover.
Maintenance

Page 14 For technical questions, please call 1-800-444 3353. Item 67853
Troubleshooting
Problem Possible Causes Likely Solutions
Engine will
not start
(Note: See engine
manual for engine
specicissues.)
COMPRESSOR SPECIFIC:
1. Pilot Valve closed.
2. Tank already pressurized.
COMPRESSOR SPECIFIC:
1. Open pilot valve before start procedure, close after unit is
running.
2. Turn engine on. Compressor will turn on as needed when
pressure reaches preset level.
Compressor
overheats
1. Incorrect lubrication or not
enough lubrication.
2. Worn parts.
1. Lubricate using recommended oil or grease according to
directions.
2. Havequaliedtechnicianinspectinternalmechanismand
replace parts as needed.
Severe air
leakage
1. Poor air outlet seal.
2. Loose cylinder/cylinder head.
3. Damaged valve or housing.
4. Dirty, worn or damaged valve.
1. Tighten or re-attach using thread seal tape.
2. Tighten cylinder/cylinder head assembly. If cylinder/cylinder
head cannot tighten properly, internal parts may be misaligned.
3. Replace damaged components.
4. Clean or replace valve assembly.
Unit stalls
1. Low engine idle.
2. Severelycloggedairlter.
3. Improper lubrication.
4. Defective pilot/unloader valve.
1. Qualiedtechnicianshouldincreaseidleto2,200±100RPMby
adjusting pressure switch.
2. Replaceairlter.
3. Check for proper oil level.
4. Replace pilot valve.
Excessive noise
1. Loosedrivepulleyorywheel.
2. Misaligned pulleys.
3. Lack of oil in crankcase.
4. Worn connecting rod.
5. Worn wrist pin bushing.
6. Worn bearings.
7. Loose belts.
1. Loose pulleys are a common cause of “knocking”. Tighten
appropriate bolts.
2. Align pulleys with straightedge and secure in place.
3. Check for proper oil level.
4. Replace connecting rod.
5. Remove piston assembly and replace necessary parts.
6. Replace bearings and oil.
7. Check for proper belt tension.
Oil in the
discharge air
1. Wrong type of oil or low-
quality oil.
2. Overheating.
3. Restricted intake air.
4. Worn piston rings.
5. Excessive moisture in the
tank.
1. Change oil. Check oil recommendations under EQUIPMENT
SET UP, Equipment Oil Fill section of this manual.
2. See above Excessive Noise section.
3. Cleanorreplaceairlter.
4. Replace piston rings.
5. Drain moisture from the tank daily.
Low discharge
pressure
1. Air leaks.
2. Leaking valves.
3. Restricted air intake.
4. Blown gaskets.
5. Slipping belts.
1. Listenforescapingair.Applysoapsolutiontoallttingsand
connections. Bubbles will appear at points of leakage. Tighten
orreplaceleakingttingsorconnections.
2. Remove head and inspect for valve breakage, weak
valves, scored valve plate, etc. Replace defective parts and
reassemble. Replace head gasket each time the head is
removed.
3. Cleanorreplaceairlterelement.
4. Replace and gaskets proven faulty on inspection.
5. Tighten Belts (See monthly maintenance.)
Follow all safety precautions whenever diagnosing or servicing the equipment or engine.

Page 15
For technical questions, please call 1-800-444 3353.Item 67853
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.

Page 16 For technical questions, please call 1-800-444 3353. Item 67853
Pump Parts List
Part Description Qty
1 Bolt M12×55 1
2 Spring Washer 12 1
3 Flat Washer 1
4 Drive Pulley 1
5 Oil Seal Circle 1
6 Flange Plate 1
7O-ringφ85 1
8 Bearing 1
9 Bolt M12×40 6
10 Oil Breather 1
11 Crank Case End Cover 1
12 Flat Key 1
13 Crankshaft 1
14 Bearing 1
15 Gasket 1
16 Crankcase 1
17 Oil Plug 1
18 Gasket 1
19 Oil Sight Glass 1
20 Drain Oil Bolt 1
21 Second Stage Cylinder Head 1
22 Bolt M12×40 4
23 Spring Washer 12 4
24 Gasket 1
25 Connecting Rod A 1
26 Connecting Rod B 1
27 Bearing Shell 2
28 Spring Washer 10 4
29 Bolt M10×55 2
30 Bushing 1
31 Clip 2
32 Pin 1
33 Piston 1
34 Wiper Ring 2
35 Piston Ring 2
36 Gasket 1
37 Valve 1
38 Aluminum Seal 1
39 Bolt M6×25 4
40 Valve Stop Block 4
41 Spring 8
42 Valve Plate 4
43 Nut M6 4
44 Lock Nut 1
45 Elbow 1
46 Taper Sleeve 1
47 Nut 1
Part Description Qty
48 Brass Tube 1
49 Cylinder Head 1
50 Spring Washer 4
51 Bolt M10×65 4
52 Bolt M8×60 1
53 Spring Washer 10 1
54 Nut 1
55 Elbow 1
56 Bolt M8×35 2
57 Spring Washer 8 2
58 Gasket 1
59 Radiator 1
60 Connector 1
61 First Stage Cylinder Head 1
62 Bolt M12×40 4
63 Spring Washer 12 4
64 Gasket 1
65 Bushing 2
66 Connecting Rod A 1
67 Connecting Rod B 1
68 Spring Washer 10 2
69 Bolt M10×55 2
70 Bushing 1
71 Wiper Ring 2
72 Piston 1
73 Pin 1
74 Clip 2
75 Piston Ring 2
76 Gasket 1
77 Valve 1
78 Aluminum Seal 1
79 Bolt M8×30 4
80 Spring 8
81 Restrictor 4
82 Valve Plate 4
83 Nut M8 4
84 Air Filter Assembly 1
85 Cylinder Head 1
86 Spring Washer 12 4
87 Bolt M12×70 4
88 Spring Washer 8 4
89 Bolt M8×70 4
90 Nut 1
91 Pump Safety Valve 1
92 Elbow 1
93 Taper Sleeve 1
94 Nut 1

Page 17
For technical questions, please call 1-800-444 3353.Item 67853
Pump Assembly Diagram

Page 18 For technical questions, please call 1-800-444 3353. Item 67853
Tank Parts List
Part Description Qty
95 Tank 1
96 Connector 1
97 Pressure Gauge 1
98 Tank Safety Valve 1
99 Unloader Valve 1
100 Throttle Control 1
101 Connector 1
102 Taper Sleeve 2
103 Pipe Nut 2
104 Brass Tube 1
105 Air Outlet 1
106 Engine 1
107 Bolt M10×40 4
108 Nut M10 4
109 Bracket 1
110 Bolt M10×50 4
111 Nut M10 4
112 Washer 8 1
113 Bolt M8×20 1
114 Bottom Plate 1
115 Nut M14 1
116 Spring Washer 14 1
Part Description Qty
117 Bracket 1
118 Threaded Rod 1
119 Bolt M6×20 1
120 Belt Guard Bracket A 1
121 Belt Guard Frame 1
122 Belt 2
123 Driven Pulley 1
124 Key 1
125 Bushing 1
126 Spring Washer 8 2
127 Bolt M8×30 2
128 Bolt M6×10 11
129 Belt Guard Cover 1
130 Bolt M6×10 1
131 Belt Guard Bracket B 1
132 Bolt M8×16 4
133 Washer 8 4
134 Bolt M12×45 4
135 Spring Washer 12 4
136 Bolt M12 2
137 Drain Valve 1