Porter-Cable C7510 User manual

Cast Iron
Oil Lube
Stationary
Air Compressor
Instruction
manual
IMPORTANT
Please make certain that the person who is
to use this equipment carefully reads and
understands these instructions before
starting operations.
Part No. D28176-049-1
ESPAÑOL: PÁGINA 29
FRANÇAIS: PAGE 57
To learn more about Porter-Cable
visit our website at:
http://www.porter-cable.com
Model
C7510
Copyright © 2003 Porter-Cable Corporation
The Model and Serial No. plate is located on the frame.
Record these numbers in the spaces below and retain for
future reference.
Model No.
Type
Serial No.

2- ENG
D28176
SAFETY GUIDELINES - DEFINITIONS
Indicates an imminently
hazardous situation
which, if not avoided, will result in death
or serious injury.
Indicates a potentially
hazardous situation
which, if not avoided, could result in
death or serious injury.
Indicates a potentially
hazardous situation
which, if not avoided, may result in
minor or moderate injury.
Used without the safety
alert symbol indicates a
potentially hazardous situation which, if
not avoided, may result in property
damage.
This manual contains information that is important for you to know and
understand. This information relates to protecting YOUR SAFETY and
PREVENTING EQUIPMENT PROBLEMS. To help you recognize this
information, we use the symbols below. Please read the manual and pay
attention to these symbols.
IMPORTANT SAFETY INSTRUCTIONS
Some dust created by power sanding, sawing, grinding,
drilling, and other construction activities contains chemicals
known (to the State of California) to cause cancer, birth defects or other
reproductive harm. Some example of these chemicals are:
●lead from lead-based paints
●crystalline silica from bricks and cement and other masonry products
●arsenic and chromium from chemically-treated lumber
Your risk from these exposures varies, depending on how often you do this
type of work. To reduce your exposure to these chemicals: work in a well
ventilated area, and work with approved safety equipment, always wear
MSHA/NIOSH approved, properly fitting face mask or respirator when using
such tools.
When using air tools, basic safety precautions should always be followed to
reduce the risk of of personal injury.

3- ENG D28176
IMPORTANT SAFETY INSTRUCTIONS
Save these instructions
Improper operation or maintenance of this product could result in serious injury and
property damage. Read and understand all warnings and operation instructions before
using this equipment.
HAZARD
WARNING: Risk of explosion or fire
How To Prevent It
What Could Happen
It is normal for electrical contacts
within the motor and pressure switch to
spark.
If electrical sparks from compressor
come into contact with flammable
vapors, they may ignite, causing fire or
explosion.
Restricting any of the compressor
ventilation openings will cause serious
overheating and could cause fire.
Unattended operation of this product
could result in personal injury or
property damage. To reduce the risk of
fire, do not allow the compressor to
operate unattended.
Always operate the compressor in a well
ventilated area free of combustible
materials, gasoline, or solvent vapors.
If spraying flammable materials, locate
compressor at least 20 feet away from
spray area. An additional length of hose
may be required.
Store flammable materials in a secure
location away from compressor.
Never place objects against or on top
of compressor. Operate compressor in
an open area at least 12 inches away
from any wall or obstruction that would
restrict the flow of fresh air to the
ventilation openings.
Operate compressor in a clean, dry well
ventilated area. Do not operate unit
indoors or in any confined area.
Always remain in attendance with the
product when it is operating.
Always disconnect electrical power by
moving pressure switch lever to the off
position and drain tank daily or after
each use.

4- ENG
D28176
WARNING: Risk of Bursting
Air Tank: The following conditions could lead to a weakening of the tank, and result
in a violent tank explosion and could cause property damage or serious injury.
How To Prevent It
What Could Happen
WARNING: Risk from Flying Objects
The compressed air stream can cause
soft tissue damage to exposed skin
and can propel dirt, chips, loose
particles, and small objects at high
speed, resulting in property damage or
personal injury.
Always wear ANSI Z87.1 approved safety
glasses with side shields when using the
compressor.
Never point any nozzle or sprayer
toward any part of the body or at other
people or animals.
Always turn the compressor off and
bleed pressure from the air hose and tank
before attempting maintenance, attaching
tools or accessories.
HAZARD
HAZARD
Drain tank daily or after each use. If
tank develops a leak, replace it
immediately with a new tank or replace
the entire compressor.
Failure to properly drain condensed
water from tank, causing rust and
thinning of the steel tank.
Modifications or attempted repairs to
the tank.
Unauthorized modifications to the
unloader valve, safety valve, or any
other components which control tank
pressure.
Never drill into, weld, or make any
modifications to the tank or its
attachments.
Excessive vibration can weaken the
air tank and cause rupture or
explosion
The tank is designed to withstand specific
operating pressures. Never make
adjustments or parts substitutions to
alter the factory set operating
pressures.
For essential control of air pressure, you
must install a pressure regulator and
pressure gauge to the air outlet (if not
equipped) of your compressor. Follow the
equipment manufacturers
recommendation and never exceed the
maximum allowable pressure rating of
attachments. Never use compressor to
inflate small low pressure objects such
as children’s toys, footballs,
basketballs, etc.
ATTACHMENTS & ACCESSORIES:
Exceeding the pressure rating of air
tools, spray guns, air operated
accessories, tires, and other inflatables
can cause them to explode or fly apart,
and could result in serious injury.
How To Prevent It
What Could Happen

5- ENG D28176
WARNING: Risk to Breathing
WARNING: Risk of Electrical Shock
HAZARD
HAZARD
Your air compressor is powered by
electricity. Like any other electrically
powered device, If it is not used
properly it may cause electric shock.
Repairs attempted by unqualified
personnel can result in serious injury
or death by electrocution.
Electrical Grounding: Failure to provide
adequate grounding to this product
could result in serious injury or death
from electrocution.
See grounding instructions.
Never operate the compressor outdoors
when it is raining or in wet conditions.
Never operate compressor with
protective covers removed or damaged.
Any electrical wiring or repairs required
on this product should be performed by
authorized service center personnel in
accordance with national and local
electrical codes.
Make certain that the electrical circuit to
which the compressor is connected
provides proper electrical grounding,
correct voltage and adequate fuse
protection.
The compressed air directly from your
compressor is not safe for breathing.
The air stream may contain carbon
monoxide, toxic vapors, or solid
particles from the tank. Breathing these
contaminants can cause serious injury
or death.
Sprayed materials such as paint, paint
solvents, paint remover, insecticides,
weed killers, may contain harmful
vapors and poisons.
Air obtained directly from the compressor
should never be used to supply air for
human consumption. In order to use air
produced by this compressor for
breathing, suitable filters and in-line
safety equipment must be properly
installed. In-line filters and safety
equipment used in conjunction with the
compressor must be capable of treating
air to all applicable local and federal
codes prior to human consumption.
Work in an area with good cross
ventilation. Read and follow the safety
instructions provided on the label or
safety data sheets for the materials you
are spraying. Use a NIOSH/ MSHA
approved respirator designed for use with
your specific application.
How To Prevent It
What Could Happen
How To Prevent It
What Could Happen

6- ENG
D28176
WARNING: Risk of Burns
Touching exposed metal such as the
compressor head or outlet tubes, can
result in serious burns.
Never touch any exposed metal parts
on compressor during or immediately
after operation. Compressor will remain
hot for several minutes after operation.
Do not reach around protective shrouds
or attempt maintenance until unit has
been allowed to cool.
WARNING: Risk from Moving Parts
Never operate the compressor with
guards or covers which are damaged or
removed.
Moving parts such as the pulley, flywheel,
and belt can cause serious injury if they
come into contact with you or your
clothing.
WARNING: Risk of Falling
A portable compressor can fall from a
table, workbench, or roof causing
damage to the compressor and could
result in serious injury or death to the
operator.
Always operate compressor in a stable
secure position to prevent accidental
movement of the unit. Never operate
compressor on a roof or other elevated
position. Use additional air hose to
reach high locations.
HAZARD
HAZARD
HAZARD
Any repairs required on this product
should be performed by authorized
service center personnel.
Attempting to operate compressor with
damaged or missing parts or attempting
to repair compressor with protective
shrouds removed can expose you to
moving parts and can result in serious
injury.
How To Prevent It
What Could Happen
How To Prevent It
What Could Happen
How To Prevent It
What Could Happen

7- ENG D28176
Review and understand all instructions
and warnings in this manual.
Become familiar with the operation and
controls of the air compressor.
Keep operating area clear of all persons,
pets, and obstacles.
Keep children away from the air
compressor at all times.
Do not operate the product when
fatigued or under the influence of
alcohol or drugs. Stay alert at all times.
Never defeat the safety features of this
product.
Equip area of operation with a fire
extinguisher.
Do not operate machine with missing,
broken, or unauthorized parts.
WARNING: Risk of Unsafe Operation
Unsafe operation of your air compressor
could lead to serious injury or death to
you or others.
HAZARD
WARNING: Risk of Serious Injury or Property Damage When
Transporting Compressor
Oil can leak or spill and could result in
fire or breathing hazard; serious injury or
death can result. Oil leaks will damage
carpet, paint or other surfaces in
vehicles or trailers.
Always place COMPRESSOR on a
protective mat when transporting to
protect against damage to vehicle from
leaks. Remove COMPRESSOR from
vehicle immediately upon arrival at your
destination.
(Fire, Inhalation, Damage to Vehicle Surfaces)
HAZARD
SAVE THESE INSTRUCTIONS
How To Prevent It
What Could Happen
How To Prevent It
What Could Happen

8- ENG
D28176
GLOSSARY
Become familiar with these terms before operating the unit.
CFM: Cubic feet per minute.
SCFM: Standard cubic feet per minute; a unit of measure of air delivery.
PSIG: Pounds per square inch gauge; a unit of measure of pressure.
Code Certification: Products that bear one or more of the following marks:
UL, CUL, ETL, CETL, have been evaluated by OSHA certified independent
safety laboratories and meet the applicable Underwriters Laboratories
Standards for Safety.
Cut-In Pressure: While the motor is off, air tank pressure drops as you
continue to use your accessory. When the tank pressure drops to a certain low
level the motor will restart automatically. The low pressure at which the motor
automatically restarts is called “cut-in” pressure.
Cut-Out Pressure: When an air compressor is turned on and begins to run,
air pressure in the air tank begins to build. It builds to a certain high pressure
before the motor automatically shuts off - protecting your air tank from
pressure higher than its capacity. The high pressure at which the motor shuts
off is called “cut-out” pressure.
Branch Circuit: Circuit carrying electricity from electrical panel to outlet.
DUTY CYCLE
This air compressor pump is capable of running continuously. To prolong the
life of the air compressor run it at a 50% - 75% duty cycle (air compressor
pumping time is 30-45 minutes per hour).
SPECIFICATIONS
Model No. C7510
Horsepower Peak 7.0
* Voltage-Single Phase 240V
* * Minimum Branch Circuit Requirement 15 amps
* Fuse Type Time Delay
Air Tank Capacity (Gallon) 60
Approximate Cut-in Pressure 110 PSIG
Approximate Cut-out Pressure 135 PSIG
SCFM @ 40 PSIG 12.3
SCFM @ 90 PSIG 10.4
* This air compressor can be operated on a 15 amp circuit if:
1. Voltage supply to circuit is normal.
2. Circuit is not used to supply any other electrical needs (lights, appliances, etc.)
3. Extension cords comply with specifications in owners manual.
4. Circuit is equipped with 15 amp circuit breaker or 15 amp time delay fuse.
If any of the above conditions cannot be met, or if operation of the air compressor
repeatedly causes interruption of the power it may be necessary to operate it from a
20 amp circuit. It is not necessary to change the cord set.
* * A circuit breaker is preferred. Use only a fuse or circuit breaker that is the same
rating as the branch circuit on which the air compressor is operated. If the air
compressor is connected to a circuit protected by fuses, use dual element time
delay fuses.

9- ENG D28176
ACCESSORIES
Accessories for this unit are available at the store the unit was purchased.
ASSEMBLY
Tools Required for Assembly
1 - 9/16” socket or open end wrench
1 - electric drill
Unpacking
1. Remove all packaging.
It may be necessary to brace or support one side of the
outfit when removing the pallet because the air
compressor will have a tendency to tip.
2. Remove and discard the (4) screws and washers holding the compressor
to the pallet.
3. With the help of another person carefully remove air compressor from
pallet and place on a level surface.
To Add Oil To Pump
Compressors are shipped without oil in the crankcase. A
small amount of oil may be present in the pump upon
receipt of the air compressor. This is due to plant testing and does not
mean the pump contains oil. Do not attempt to operate this air
compressor without first adding oil to the crankcase. Serious damage can
result from even limited operation unless filled with oil and broken in
correctly. Make sure to closely follow initial start-up procedures.
Multi-Viscosity motor oils, like 10W 30, should not be used
in an air compressor. They leave carbon deposits on
critical components, thus reducing performance and compressor life. Use
air compressor oil only.
NOTE: Oil is included with some units. If oil is not included, use an oil
specifically formulated for use in an air compressor, such as Porter-Cable PAS1
air compressor oil. Oil may be found at the store where the air compressor was
purchased.
1. Place unit on a level surface.
Drain tank to release air pressure before removing the oil
fill cap or oil drain plug.
2. Remove oil fill plug (A) and slowly
add compressor oil until it reaches
the middle of the sight glass (B).
NOTE: When filling the crankcase,
the oil flows very slowly into the
pump. If the oil is added too quickly,
it will overflow and appear to be full.
NOTE: Crankcase oil capacity is
approximately 29 fluid ounces.
3. Replace oil fill plug.
A
B

10- ENG
D28176
Anchoring of the Air Compressor
Excessive Vibration can weaken the air tank and cause an
explosion. The compressor must be properly mounted.
The air compressor MUST be bolted to a solid, level surface.
Hardware needed:
4 - Concrete anchors (not supplied)
4 - 3/8” Lag screw to fit concrete anchors
(not supplied)
4 - 5/8” Washer (found in parts bag)
shims (if needed)
1. Place the air compressor on on a solid, level surface.
2. Mark the surface using the holes in the air compressor feet as a template.
3. Drill holes in the surface for the concrete anchors. Install concrete anchors.
4. Line-up holes in surface with holes in air compressor feet.
5. Place the (4) washers (supplied) between the floor and air compressor feet.
If needed, solid shims may be placed between the washers and floor to
evenly distribute weight on all four feet.
6. Place the (4) 3/8” lag screws through the air compressor feet, washers,
shims, and into the anchors.
7. Torque 3/8” lag screws to 7-10 ft.-lbs.
Location of the Air Compressor
• Locate the air compressor in a clean, dry, and well ventilated area.
• Locate the air compressor at least 12" away from the wall or other
obstructions that will interfere with the flow of air.
• Locate the air compressor as close to the main power supply as possible
to avoid using long lengths of electrical wiring. NOTE: Long lengths of
electrical wiring could cause power loss to the motor.
• The air filter must be kept clear of obstructions which could reduce air flow
to the air compressor.
HOW TO SET UP YOUR UNIT
3/8” Lag
Screw
(not supplied)
5/8” Washer
(supplied)
Shim Under
Washer
(not supplied)
Concrete Anchor
(not supplied)
Surface Line
INSTALLATION

11- ENG D28176
Wiring Instructions
RISK OF ELECTRICAL SHOCK. Improper electrical
grounding can result in electrical shock. The wiring
should be done by a qualified electrician to comply with national and local
electrical codes.
A qualified electrician needs to knows the following before wiring:
1. The amperage rating of the electrical box should be adequate. Refer to the
product specifications, found in the parts manual, for this information.
2. The supply line should have the same electrical characteristics (voltage,
cycle, phase) as the motor. Refer to the motor nameplate, on side of
motor, for this information.
NOTE: The wiring must be the same as the motor nameplate voltage plus or
minus 10%. Refer to local codes for recommended wire sizes, correct wire
size, and maximum wire run; undersize wire causes high amp draw and
overheating to the motor.
Electrical wiring must be located away from hot surfaces
such as manifold assembly, compressor outlet tubes,
heads, or cylinders.
GROUNDING INSTRUCTIONS
This product should be connected to a metallic, permanent wiring system, or
an equipment-grounding terminal or lead on the product and comply with
national and local electrical codes.
Refer to the product specification found in the front of this manual for the
voltage and minimum branch circuit requirements.

12- ENG
D28176
Air Distribution System
Plastic or PVC pipe is not designed for use with
compressed air. Regardless of its indicated pressure
rating, plastic pipe can burst from air pressure. Use only metal pipe for air
distribution lines.
The next figure represents a typical air distribution system. The following are
tips to remember when setting up the air compressor’s air distribution system.
●Use pipe that is the same size as the air tank outlet. Piping that is too
small will restrict the flow of air.
●If piping is over 100 feet long, use the next larger size.
●Bury underground lines below the frost line and avoid pockets where
condensation can gather and freeze. Apply pressure before underground
lines are covered to make sure all pipe joints are free of leaks.
●A flexible coupling is recommended to be installed between the air
discharge outlet and main air distribution line to allow for vibration.
●A separate regulator is recommended to control the air pressure. Air
pressure from the tank is usually to high for individual air driven tools.
DRAIN
TRAP
DRAIN
TRAPS
DRAIN
LEGS
MOISTURE
SEPARATOR
AND TRAP
DIRT
LEG
DIRT
LEG
LUBRICATOR
REGULATOR
FILTER
AIR DISCHARGE
VALVE
LUBRICATOR
MAIN DISTRIBUTION AIR LINES
Slope pipe in direction of air flow.
Water condensate flows along
bottom of pipe to drain legs,
preventing it from entering feeder
lines.
REGULATOR
FLEXIBLE
COUPLING
DRAIN COCK
VALVE
TYPICAL COMPRESSED
AIR DISTRIBUTION SYSTEM
AIR USAGE
LINES
AIR
COMPRESSOR

13- ENG D28176
Description of Operation
Become familiar with these controls before operating the unit.
On/Auto/Off Switch: Turn this switch
ON to provide automatic power to
the pressure switch and OFF to
remove power at the end of each
use.
Pressure Switch: The pressure
switch automatically starts the motor
when the air tank pressure drops
below the factory set “cut-in”
pressure. It stops the motor when the
air tank pressure reaches the factory
set “cut-out” pressure.
Safety Valve: If the pressure switch
does not shut off the air compressor
at its “cut-out” pressure setting, the
safety valve will protect against high
pressure by “popping out” at its factory set pressure (slightly higher than the
pressure switch “cut-out” setting).
Tank Pressure Gauge: The tank pressure gauge indicates the reserve air
pressure in the tank.
Globe Valve (sold separately): Opens and closes air discharge valve. Turn
knob counter-clockwise to open and clockwise to close.
Drain Valve: The drain valve is located at the
base of the air tank and is used to drain
condensation at the end of each use.
Air Compressor Pump (not shown):
Compresses air into the air tank. Working air is
not available until the compressor has raised the
air tank pressure above that required at the air outlet.
Check Valve: When the air compressor is operating,
the check valve is “open”, allowing compressed air to
enter the air tank. When the air compressor reaches
“cut-out” pressure, the check valve “closes”, allowing
air pressure to remain inside the air tank.
OPERATION
Know Your Air Compressor
READ THIS OWNER’S MANUAL AND SAFETY RULES BEFORE OPERATING
YOUR UNIT. Compare the illustrations with your unit to familiarize yourself with
the location of various controls and adjustments. Save this manual for future
reference.
Globe Valve
Tank
Pressure
Gauge
Safety Valve
On/Auto/Off
Switch
Pressure
Switch
Drain
Valve
Check Valve

14- ENG
D28176
Pressure Release Valve: The pressure release
valve, located on the side of the pressure switch, is
designed to automatically release compressed air
from the compressor head and the outlet tube when
the air compressor reaches “cut-out” pressure or is
shut off. The pressure release valve allows the motor
to restart freely. When the motor stops running, air
will be heard escaping from this valve for a few
seconds. No air should be heard leaking when the motor is running, or
continuous leaking after unit reaches “cut-out” pressure.
Air Intake Filter (not shown) This filter is designed to clean air coming into
the pump. This filter must always be clean and ventilation openings free from
obstructions. See "Maintenance".
How to Use Your Unit
How to Stop:
1. Set the On/Auto/Off lever to “OFF”.
Pressure
Release
Valve
Before Starting
Break-in Procedure
Serious damage may result if the following break-in
instructions are not closely followed.
This procedure is required before the air compressor is put into service and
when the check valve or a complete compressor pump has been replaced.
1. Make sure the On/Auto/Off lever is in the "OFF" position.
2.
Recheck all wiring. Make sure wires are secure at all terminals connections.
Make sure all contacts move freely and are not obstructed.
3. Open the globe valve fully to permit air to escape and prevent air pressure
build up in the air tank during the break-in period.
4. Move the On/Auto/Off lever to "ON/AUTO" position. The compressor will
start.
5. Run the compressor for 20 minutes. Make sure the globe valve is open
and there is minimal air pressure build-up in tank.
6. Check all air line fittings and connections/piping for air leaks by applying a
soap solution. Correct if necessary. NOTE: Minor leaks can cause the air
compressor to overwork, resulting in premature breakdown or inadequate
performance.
7. Check for excessive vibration. Readjust or shim air compressor feet, if
necessary.
8. After 20 minutes, close the globe valve.The air receiver will fill to “cut-out”
pressure and the motor will stop.

15- ENG D28176
How to Start
1. Turn the On/Auto/Off lever to “AUTO” and allow tank pressure to build.
Motor will stop when tank pressure reaches “cut-out” pressure.
2. When the tank pressure reaches “cut-out” pressure open the globe valve.
IMPORTANT: When using regulator and other accessories refer to the
manufacturers instructions.
NOTE: Always operate the air compressor in well-ventilated areas free of
gasoline or other combustible vapors. If the compressor is being used to
operate a sprayer, DO NOT place compressor near the spray area.
Before Each Start-Up:
1. Place On/Auto/Off lever to “OFF”.
2. Close the globe valve.
3. Attach hose and accessories. NOTE: A regulator MUST be installed when
using accessories rated at less than 110 PSI.
Too much air pressure causes a hazardous risk of bursting.
Check the manufacturer’s maximum pressure rating for air
tools and accessories. The regulator outlet pressure must never exceed the
maximum pressure rating.

16- ENG
D28176
MAINTENANCE
Customer Responsibilities
Daily or
after each
use
Before
each
use
●
●
●
Every
8
hours
Every
40
hours
Every
100
hours
Yearly
●
●1
1- more frequent in dusty or humid conditions
Check Safety Valve
Drain Tank
Oil Leaks
Check Oil
Change Oil
Air Filter
NOTE: See “Operation” section for the location of controls.
To ensure efficient operation and longer life of the air compressor outfit, a
routine maintenance schedule should be prepared and followed. The following
routine maintenance schedule is geared to an outfit in a normal working
environment operating on a daily basis. If necessary, the schedule should be
modified to suit the conditions under which your compressor is used. The
modifications will depend upon the hours of operation and the working
environment. Compressor outfits in an extremely dirty and/or hostile
environment will require a greater frequency of all maintenance checks.
Unit cycles automatically when power is on. When
performing maintenance, you may be exposed to voltage
sources, compressed air, or moving parts. Personal injuries can occur.
Before performing any maintenance or repair, disconnect power source
from the compressor and bleed off all air pressure.
To Check Safety Valve
If the safety valve does not work properly, over-
pressurization may occur, causing air tank rupture or an
explosion.
1. Before starting compressor, pull the ring on the safety valve to make sure
that the safety valve operates freely. If the valve is stuck or does not
operate smoothly, it must be replaced with the same type of valve.
Unusual Noise
and/or Vibration
Drive Belt-Condition
Motor Pulley/Flywheel alignment
Air compressor pump intake
and exhaust valves
Inspect air lines and
fittings for leaks
●
●
●
●
●
●
Head Bolts - Check the torques of the head bolts after the first five hours of operation.

17- ENG D28176
Oil
Checking
1. The oil level should be to the middle
of the sight glass (C).
2. If needed remove oil fill plug (A) and
slowly add oil until it reaches the
middle of the sight glass.
NOTE: Use an oil specifically formulated
for use in an air compressor, such as
Porter-Cable PAS1 air compressor oil.
Oil may be found at the store where the
air compressor was purchased.
Changing
Drain tank to release
air pressure before
removing the oil fill cap or oil drain
plug.
1. Remove the oil fill plug (A).
2. Remove the oil drain plug (B) and drain oil into a suitable container.
3. Replace the oil drain plug (B) and tighten securely
4. Slowly add compressor oil until it reaches the middle of the sight glass (C).
NOTE: When filling the crankcase, the oil flows very slowly into the pump.
If the oil is added too quickly, it will overflow and appear to be full. NOTE:
Crankcase oil capacity is approximately 29 fluid ounces (857,6 ml).
Overfilling with oil will cause premature compressor
failure. Do not overfill.
5. Replace oil fill plug (A) and tighten securely.
To Drain Tank
NOTE: Operation of the air compressor will cause condensation to build up in
the air tank. Always drain tank on a washable surface or into a suitable
container to prevent damaging or staining surfaces.
1. Set the On/Auto/Off lever to “OFF”.
2. Close the globe valve.
3. Remove the air tool or accessory.
4. Open the globe valve and allow the air to slowly bleed from the air tank
until tank pressure is approximately 20 psi.
5. Close the globe valve.
6. Drain water from air tank by opening drain valve (counter-clockwise) on
bottom of tank.
Water will condense in the air tank. If not drained, water
will corrode and weaken the air tank causing a risk of air
tank rupture.
7. After the water has been drained, close the drain valve (clockwise). The air
compressor can now be stored.
NOTE: If drain valve is plugged, release all air pressure. The valve can then be
removed, cleaned, then reinstalled.
C
B
A

18- ENG
D28176
Air Filter - Inspection and Replacement
Hot surfaces. Risk of burn. Compressor heads are
exposed when filter cover is removed. Allow compressor
to cool prior to servicing.
A dirty air filter will not allow the compressor to operate at full capacity. Keep
the air filter clean at all times.
1. Remove air filter(s).
2. Remove the air filter cover (s).
3. Remove the air filter(s) from filter cover(s).
IMPORTANT: Do not operate the compressor with the air filter removed.
4. Place new air filter into filter cover(s). Refer to the “Repair Parts” for the
correct part number.
5. Replace air filter cover(s) and reassemble air filter(s) to pump.
Adjusting Belt Tension
1. Slide motor into original position, line the motor up with the mark made
earlier on saddle.
2. Tighten two outside motor mounting screws enough to hold the motor in
place for checking pulley and flywheel alignment.
Belt - Replacement
(Refer to the Parts Manual for replacement belt part number.)
Serious injury or damage may occur if parts of the body or
loose items get caught in moving parts. Never operate the
outfit with the belt guard removed. The belt guard should be removed only
when the AIR compressor power is disconnected.
1. Turn air compressor off, lock out the power supply, and relieve all air
pressure from the air tank.
2. Remove the belt guard.
3. Mark pump position on saddle.
4. Loosen the motor mounting screws and slide the motor toward the air
compressor.
5. Remove the belt and replace with a new one.
6. See the “Adjust Belt Tension” before tightening motor mounting screws.
Belt Guard – Removal
1. Turn air compressor off, lock out
the power supply, and relieve all
air pressure from the air tank.
2. Remove the six screws (A) from
the belt guard. The belt guard
can now lifted up and away from
unit.
A

3. The belt should deflect 3/16" at
midway between the pulley and
the flywheel when a 5 pound
weight is applied at the midway
point.
3. When proper belt tension is
achieved, tighten all four motor
mounting screws. See Parts
manual for torque specifications.
NOTE: Once the engine pulley has
been moved from its factory set
location, the grooves of the flywheel and pulley must be aligned to within
1/16" to prevent excessive belt wear. Verify the alignment by performing
the following Pulley and Flywheel - Alignment.
19- ENG D28176
Motor Pulley/Flywheel Alignment
NOTE: Once the motor pulley has been moved from its factory set location,
the grooves of the flywheel and pulley must be aligned to within 1/16" to
prevent excessive belt wear.
The air compressor flywheel and motor pulley must be in-line (in the same
plane) within 1/16" to assure belt retention within flywheel belt grooves. To
check alignment, perform the following steps:
1. Turn air compressor off, lock out the power supply, and relieve all air
pressure from the air tank.
2. Remove belt guard
3. Place a straightedge against the
outside of the flywheel and the
motor drive pulley.
4. Measure the distance between
the edge of the belt and the
straightedge at points A1 and A2
in figure. The difference
between measurements should be no more than 1/16".
5. If the difference is greater or less than 1/16" loosen the set screw holding
the motor drive pulley to the shaft and adjust the pulley’s position on the
shaft until the A1 and A2 measurements are within 1/16" of each other.
6. Tighten the motor drive pulley set screw. See Parts manual for torque
specifications.
7. Visually inspect the motor drive pulley to verify that it is perpendicular to
the drive motor shaft. Points B1 and B2 of Figure should appear to be
equal. If they are not, loosen the setscrew of the motor drive pulley and
equalize B1 and B2, using care not to disturb the belt alignment performed
in step 2.
8. Retighten the motor drive pulley setscrew. See Parts manual for torque
specifications.
9. Reinstall belt guard.
Downward Force
Deflection

20- ENG
D28176
Air Compressor Pump Intake and Exhaust Valves
Once a year have a Trained Service Technician check the air compressor pump
intake and exhaust valves.
Inspect Air Lines and Fittings for Leaks
1. Turn air compressor off, lock out the power supply, and relieve all air
pressure from the air tank.
2. Apply a soap solution to all air line fittings and connections/piping.
3. Correct any leaks found.
IMPORTANT: Even minor leaks can cause the air compressor to overwork,
resulting in premature breakdown or inadequate performance.
Air compressor Head Bolts - Torquing
The air compressor pump head bolts should be kept properly torqued. Check
the torques of the head bolts after the first five hours of operation. Retighten if
necessary. See Parts manual for torque specifications.