Craftsman 919.157260 User manual

Owner’s Manual
Portable/Stationary
Gasoline Engine
AIR COMPRESSOR
• Safety Guidelines
• Assembly
• Operation
• Maintenance
• Troubleshooting
• Repair Parts
Model No.
919.157260
CAUTION: Read the Safety Guidelines
and All Instructions Carefully Before
Operating.
Sears, Roebuck and Co., Hoffman Estates, IL 60179 U.S.A.
Visit our Craftsman website: www.sears.com/craftsman
A13567 Rev. 2 01/4/07

Model No. 919-157260
Engine HP 5
Bore 2.875"
Stroke 2"
Air Tank Capacity (gallons) 20
Approx. Unloader Reset Pressure (psig) 120
Approx. Unloader Blow-Off Pressure (psig) 150
SCFM @ 40 psig 12.0
SCFM @ 90 psig 10.0
SPECIFICATION CHART
2- ENG
A13567
ONE YEAR FULL WARRANTY
If this product fails due to a defect in material or workmanship within one year
from the date of purchase, Sears will at its option repair or replace it free of
charge. Contact Sears at 1-800-4-MY-HOME®to arrange for repair, or return it
to the place of purchase for replacement.
If this product is used for commercial or rental purposes, this warranty applies
for only ninety days from the date of purchase.
This warranty gives you specific legal rights and you may have other rights
which vary from state to state.
Sears, Roebuck and Co., Dept. 817WA, Hoffman Estates, IL 60179
TABLE OF CONTENTS
WARRANTY
WARRANTY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
SPECIFICATION CHART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
SAFETY GUIDELINES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-8
GLOSSARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-11
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13-16
MAINTENANCE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17-19
SERVICE AND ADJUSTMENTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19-21
STORAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
TROUBLESHOOTING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22-25
REPAIR PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26-29
ESPAÑOL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30-53
REPAIR PROTECTION AGREEMENTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
HOW TO ORDER REPAIR PARTS . . . . . . . . . . . . . . . . . . . . . . . . . .back cover

3- ENG A13567
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.

4- ENG
A13567
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.

5- ENG A13567
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

6- ENG
A13567
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.
Sprayed materials such as paint, paint
solvents, paint remover, insecticides,
weed killers, may contain harmful
vapors and poisons.
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
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.
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.

7- ENG A13567
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 ItWhat Could Happen

8- ENG
A13567
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

9- ENG A13567
ACCESSORIES
This unit is capable of powering the following Accessories. The accessories are
available through the current Power and Hand Tool Catalog or full-line Sears
stores.
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.
Unloader Blow-Off Pressure: All
models are continuous running units
controlled by tank pressure. When the
maximum tank pressure is obtained,
the unloader valve will blow-off. This
will cause the compressor to exhaust
the air to the atmosphere and not the
tank. This decreases the load on the
engine and allows it to run at a near
no-load condition.
Unloader Reset Pressure: When
the tank pressure drops to a
predetermined point, the unloader
valve closes. The tank pressure will
now increase until it reaches the
unloader blow-off pressure.
Accessories
• In Line Filter
• Tire Air Chuck
• Quick Connector Sets (various
sizes)
• Air Pressure Regulators
• Oil Fog Lubricators
• Air Hose:1/4", 3/8" or 1/2" I.D. in
various lengths
Refer to the selection chart located
on the unit to select the tools this unit
is capable of powering.
ASSEMBLY
Contents of Carton
1 - Air Compressor
1 - Thread Sealant Tape
1 - Screw .250-20 .625 Set Square
1 - Shut-off Valve 1/4" NPT
1 - Engine Manual
1 - Owner's Manual
4 - Vibration Mount
8 - Lock Washer
4 - Flat Washer
8 - Hex Nut .313-18 UNC
4 - Cap Screw
4 - Hex Nut .250-20 UNC
2 - Hex Nut .375-16 UNC
2 - Rubber Feet
1 - Foot Bracket
2 - Shoulder Bolt
2 - Lock Washer
1 - Handle
1 - Grip Handle
2 - Wheel
Tools Required for Assembly
1 - a 9/16" socket or open-end
wrench for attaching the wheels
1 - a 7/16" open-end wrench for
attaching the foot extension
bracket and rubber feet
1 - a 1/4" open-end wrench for
attaching the shut-off valve and
air outlet adapter.

10- ENG
A13567
Unpacking
1. Remove unit from carton and
discard all packaging. NOTE:
Save all parts bags.
The wheels and
handle do not
provide adequate clearance,
stability or support for pulling the
unit up and down stairs or steps.
The unit must be lifted, or pushed
up a ramp.Installing Handle
Do not use the
engine gas tank
as a support for lifting the air
compressor.
1. Insert the handle into pockets
under the tank saddle. Put one
set screw through hole in one
side of tank saddle and tighten
down on handle.
Handle
Set Screw
Tank Saddle
It will be necessary
to brace or
support one side of the unit when
installing the wheels because the
compressor will have a tendency
to tip.
1. Attach the rubber feet to the
bottom of the foot extension
bracket as shown. Attach foot
extension bracket to the air tank
bracket as shown.
2. Attach wheels with shoulder
bolts and nuts as shown. Place
the bolts in the top hole of
the wheel bracket on unit.
3. Tighten securely. NOTE: The
unit will sit level if the wheels are
properly installed.
Rubber Foot
Extension Bracket
Cap Screw
Lock Washer
Hex Nut
Cap Screw
Shoulder Bolt Wheel
Hex Nut
Handle
Set Screw
Tank Saddle
Assemble Wheels and Rubber
Feet for Portability
Excessive tank
vibration can
weaken the air tank and cause
rupture or explosion. Rubber feet
must be installed.

Assemble Shut-Off Valve
1. Apply pipe sealant to the tapered
pipe threads on the shut-off
valve and tighten into the
manifold.
11- ENG A13567
Permanent Installation
Bolting legs to a
stiff surface can
cause tank rupture resulting in
serious injury or damage. Do not
permanently mount compressor
to any surface without using the
vibration mount kit.
This compressor may be permanently
mounted in a location such as a truck
bed, it desired. A vibration mount kit
is included for this purpose.
1. In order to maintain adequate
ventilation for compressor
cooling and to avoid contact with
pick-up truck bed, always mount
the unit at least 8" from any
vertical wall. Using the holes in
the air tank legs as a guide, mark
and drill four 5/16" diameter
holes in the mounting surface.
2. Insert the vibration mounts in
the mounting holes. Place a
flat washer under the mounting
surface and secure each mount
with a lock washer and nut.
3. Set the unit on the exposed
threaded ends of the mount
to the air tank legs with a lock
washer and nut.
Lubrication and Oil Engine
Drain tank to
release air
pressure before removing the oil fill
cap or oil drain plug.
1. The engine was filled WITH
oil at the manufacturer. Check
engine oil level before operating
unit. If necessary, fill engine
to the appropriate level with
recommended oil, see engine
manual supplied by engine
manufacturer for correct
procedure.
2. Add fuel to engine. See engine
manual supplied by engine
manufacturer for correct
procedure. Gasoline vapor is
highly flammable.
Refuel outdoors preferably, or only
in well-ventilated areas. Do not
refuel or check gasoline level while
the engine is running. Do not store,
spill, or use gasoline near an open
flame, a source of sparks (such
as welding), or near operating
electrical equipment.
Air Compressor
The air compressor pump was filled
WITH oil at the manufacturer. Check
air compressor pump oil level before
operating unit. If necessary, fill pump
to the appropriate level with approved
compressor oil, see the Maintenance
section of this manual for details.
shut-off valve
manifold

12- ENG
A13567
INSTALLATION
Location of the Air Compressor
Exhaust from
the gasoline
engine contains deadly carbon
monoxide, which is odorless and
toxic. Operate engine only in well
ventilated areas.
The air compressor must be operated
in a clean, dry, and well-ventilated
area. The air compressor's crankcase
and head are designed with cooling
fins to provide proper cooling. The
fan blades of the compressor, the
flywheel, must be kept clear of ob-
structions that could interfere with the
flow of air through the air intake filter.
Do not install the air compressor in
a location where heat is excessive.
If the humidity in the operating area
is high, an air filter can be installed
on the air outlet adapter to remove
excessive moisture. This type air filter
is not provided with this air compres-
sor and must be purchased separate-
ly. Closely follow the instructions
packaged with the filter for proper
installation. Do not allow the air
compressor to get
wet if it is installed outdoors.
Piping 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.
If a pipe line is necessary, 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 to lines before
underground lines are buried to make
sure all pipe joints are free of leaks.

13- ENG A13567
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.
Unloader Valve: All models are
continuous running outfits controlled
by tank pressure. When the maximum
tank pressure is obtained, the
unloader valve will exhaust the
compressed air to the atmosphere
(blow-off). When the pressure
drops to a predetermined point, the
unloader valve closes and causes the
tank pressure to increase.
Safety Valve: If the unloader valve
does not shut off the air compressor
at or near 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 unloader blow-off setting).
Description of Operation
Become familiar with these controls
before operating the unit.
Air Compressor Pump (not shown):
To compress air, the pistons move
up and down in the cylinders. On the
downstroke, air is drawn in through
the air intake filter and then through
the air intake valves. The exhaust
valve remains closed. On the upstroke
of the piston, air is compressed. The
intake valves close and compressed
air is forced out through the exhaust
valve, through the outlet tube, through
the check valve and into the air tank.
Working air is not available until
the compressor has raised air tank
pressure above that required at the air
outlet.
Throttle Control (not shown): A
throttle control has been incorporated
as an extra feature. When maximum
tank pressure is reached and the
unloader valve unloads air, it also
activates a throttle control on the
engine. This gas saving feature holds
the engine at a factory-set idling
speed until air pressure in the air
tank drops to reset pressure; it then
reactivates the throttle control and
accelerates the engine to full throttle.
Tank Pressure
Gauge: The
tank pressure
gauge indicates
the reserve air
pressure in the
tank.
Unloader Valve
Safety Valve
Tank
Pressure
Gauge

14- ENG
A13567A13567
Before First Start-up
Break-in Procedure
Serious damage
may result if the
following break-in instructions are
not closely followed.
This procedure is required when:
1. Before the air compressor is used
for the first time.
2. When the unloader valve is
replaced.
3. When a complete compressor
pump is replaced.
The procedure:
1. To prevent pressure from building
up in the air tanks during this
break-in period, you must
open the unit's unloader valve.
Place unloader valve in "Open"
position as shown.
2. Turn shut-off valve knob into
open position.
3. Start engine. See engine manual
supplied by engine manufacturer
for correct procedure.
Open
open
postion
Shut Off Valve: Opens and closes air
flow.
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 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".
Engine
Stop Lever:
Used to
stop engine.
Push down
and hold
until engine
shuts off.
How to Use Your Unit
How to Stop:
1. See the engine manufacturer's
manual for the procedure to
safely shut down the gasoline
engine. Turning the gasoline
engine off will turn off the air
compressor as well.
Shut-off Valve
Drain
Valve
Engine
Stop Lever

The air compressor
is top heavy. Make
sure the unit is in a stable position
and will not tip before pulling the
starter cord of the engine.
4. Make sure the unloader valve is
in the "Open" position to prevent
tank pressure buildup.
5. Run the air compressor for 30
minutes to seat the rings and
lubricate all the internal surfaces.
Make sure there is no pressure
build up in the tank by observing
the reading on the tank pressure
gauge.
6. Place unloader valve in the
"Closed" position as shown.
7. Close the shut-off valve knob.
This will allow air to build pressure
in the air tanks.
15- ENG A13567
Closed
NOTE: When the air tank is
pressurized, the tank pressure gauge
will indicate the pressure available in
the air tank and the gasoline engine
will reduce its speed to idle and keep
running. The pressurization of the air
tank will be adjusted automatically
by the "reset" and "blow off" setting
of the unloader valve. When the
pressure in the air tank drops to the
"reset" value, the gasoline engine will
increase its rpm to operate the com-
pressor and pressurize the tanks.
When the pressure in the air tank
increases to the "blow off" value, the
engine rpm will drop to idle.
NOTE: Consult the engine manufac-
turer's manual for the proper engine
break-in running time and oil change
interval for the engine used on your
air compressor as well as other
engine maintenance requirements.
8. Compressed air will be available
from the unit's outlet valve until
it is used up or bled off. The
compressor is now ready for use.
Before each start-up
Perform the following checks before
starting the air compressor.
1. Make sure nothing is blocking the
belt guard, air openings, or air
filter inlet.
2. Make sure the unloader valve
moves freely and smoothly.
3. Check the oil level in the pump
and engine, add oil if necessary.
Temperature
of muffler and
near by areas my exceed 150°F
(65°C) avoid these areas.
4. Clean or blow off fins or any part
of the air compressor that collects
dust and dirt. The air compressor
will run cooler and provide longer
service.
5. Open the unloader valve of the air
compressor before starting the
engine.
closed
postion

16- ENG
A13567
To start-up
6. Start the engine (see engine
manual supplied by engine
manufacturer for correct
procedure) and close unloader to
allow tank pressure to pump up
to blow-off pressure.
Unit is top heavy.
Make sure the
compressor is stable and will not tip
before pulling the starting cord.
Too much air
pressure causes
a hazardous risk of bursting.
Closely monitor the air pressure
gauge of the tank so the maximum
pressure limit is not exceeded and
monitor the safety valve to ensure
excess pressure is discharged. If
pressure continues to build beyond
safe limits, shut the unit down
immediately and troubleshoot the
problem.
7. Check all fittings and piping for
air leaks. Even minor leaks can
cause the air compressor to
overwork, resulting in premature
breakdown or unsatisfactory
performance.
8. Check for any unusual vibration
and noise.
9. Check for oil leaks and correct
any leaks found.
10. Check the pressure ratings of the
air tools and accessories being
used with this air compressor
before attaching, then adjust the
shut-off valve for that value.
The air
compressor's
outlet pressure must never exceed
the maximum pressure rating of the
tool or accessory being used. If a
pressure regulator is not used, do
not use accessories rated at less
than 110 psi.
11. Attach air hose and accessory.
Your unit is ready for use.
Compressed air
from the unit may
contain water condensation and oil
mist. Do not spray unfiltered air at
an item that could be damaged by
moisture. Some air operated tools
or devices may require filtered air.
Read the instructions for the air tool
or device.
Shutting Down
12. Push down engine stop lever and
hold until engine shuts off.
13. Close shut-off valve.
14. Remove the air tool or accessory.
15. Open shut-off valve and allow
air to slowly bleed from the
tank. Close the shut-off valve
or when the tank pressure is
approximately 20 PSIG.
Drain air tank daily.Water will
condense in air
tank. If not drained,
water will corrode and weaken
the air tank causing a risk of tank
rupture.
16. With tank pressure at
approximately 20 PSIG, open the
drain valves and allow moisture
to drain.
NOTE: If drain cock is clogged,
release all air pressure. The
drain cock can then be removed,
cleaned, and reinstalled.
17. After the water has been drained,
close the drain cocks. The air
compressor can now be stored.

17- ENG A13567
MAINTENANCE
Customer Responsibilities
Daily
or after
each
use
Before
each
use
●
●
●
●
Every
8
hours
Every
40
hours
Every
100
hours Yearly
Every
160
hours
●
●1
1- more frequent in dusty or humid conditions
Check Safety Valve
Drain Tank
Oil Leaks
Check Pump Oil
Change Pump 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 units in an extremely dirty and/or hostile environment
will require a greater frequency of all maintenance checks.
During maintenance, you could be exposed to compressed
air or moving parts. Personal injuries can occur. Before
doing any maintenance or repair, disconnect the spark plug wire to prevent
accidental starting, and relieve air tank pressure. Never operate the
compressor with the belt guard removed.
To Check Safety Valve
If the safety valve
does not work
properly, over-pressurization may
occur, causing air tank rupture or
an explosion.
●
●
●
●
Drive Belt -Condition
Motor Pulley/Flywheel alignment
Air compressor pump intake
and exhaust valves
Unusual Noise and/or Vibration
Consult the Engine Owners Manual for the manufacturer's recommendations
for any and all engine maintenance.
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.

18- ENG
A13567
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. Keep the air filter
clean at all times.
Do not operate the air compressor
with the air filter removed.
A dirty air filter will not allow the
compressor pump to operate at
full capacity. Before using the
compressor pump, check the air
filter to make sure it is clean and in
place.
If it is dirty, replace it with a new filter.
1. Remove the air
filter cover.
2. Remove the air
filter from filter
cover.
IMPORTANT: Do not operate
the compressor with the air filter
removed.
Oil Drain tank to
release air pressure
before removing the oil fill cap or oil
drain plug.
Checking
1. Remove the oil
fill plug (A). The
oil level should
be even with the
top of the fill hole
and no lower
than 6 threads
from the top of
fill hole.
2. If needed, slowly add oil until it
reaches the top of fill hole.
NOTE: Use an oil specifically
formulated for use in an air
compressor, such as Sears 9-16426
air compressor oil.
A
B
To Drain Tank
1. Push down and hold engine stop
lever until engine shuts off.
2. Remove the air tool or accessory.
3. Pull ring on safety valve allowing
air to bleed from the tank until
tank pressure is approximately 20
psi. Release safety valve ring.
4. 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.
5. 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.
Changing
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 fill crankcase to the top of
the fill hole. Crankcase capacity
is 16 fluid ounces (473.2 ml).
Overfilling with
oil will cause
premature compressor failure. Do
not overfill.
5. Replace oil fill plug (A) and
tighten securely.

19- ENG A13567
3. When tank is empty, remove
safety valve (A) from manifold.
Refer to Figure.
To Install New Safety Valve:
1. Verify new safety valve is the
correct pressure rating for your air
compressor.
2. Verify threads for safety valve in
manifold are clean.
3. Apply thread sealant to the
threads of new safety valve.
4. Install new safety valve and
tighten securely.
5. Reconnect spark plug wire to
engine.
Safety Valve-Replacement
If the safety valve
does not work
properly, over-pressurization can
occur and cause air tank rupture
or explosion. Daily pull the ring on
the safety valve and make sure it
operates freely. If the valve is stuck
or does not operate smoothly, it
must be replaced with the same
type of valve having an identical
pressure rating.
To Remove Safety Valve:
1. Make sure the air compressor unit
is off and disconnect the spark
plug wire.
2. Open the shut-off valve and allow
all air to bleed from the tank.
Monitor tank pressure gauge as
tank is emptied.
3. Place new air filter into filter
cover. Refer to the "Repair Parts"
for the correct part number.
4. Replace air filter cover and lock
into place.
Air Compressor Pump Intake
and Exhaust Valves
Once a year have a Trained Service
Technician check the air compressor
pump intake and exhaust valves.
SERVICE AND ADJUSTMENTS
ALL MAINTENANCE AND REPAIR OPERATIONS NOT LISTED MUST
BE PERFORMED BY TRAINED SERVICE TECHNICIAN.
Before servicing:
Stop engine.
Bleed tank of pressure.
Allow the air compressor to cool. A

5. (Refer to Figure) Being careful
not to remove the stiffener plate
under the saddle, loosen the six
engine mounting bolts (C).
6. Slide engine toward pump to
remove tension from the belt, and
then remove the old belt.
7. Install the new belt over the
pulleys.
NOTE: The belt must be centered
over the grooves on the engine
pulley and flywheel.
8. Slide the engine back into its
regular position. Line the engine
up with the mark made earlier on
saddle.
Belt Tension - Adjustment
1. Hold belt tension and securely
tighten two engine mounting
bolts.
2. Measure correct belt tension.
Proper tension is achieved when
a three (3) pound weight or
equivalent finger pressure applied
midway between the motor
pulley and compressor flywheel
causes a 1/4" deflection of the
belt as shown.
3. When proper belt tension is
achieved, tighten the remaining
engine mounting bolts.
4. Tighten stiffener bracket screws.
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.
20- ENG
A13567
Belt – Replacement and
Adjustment Serious injury or
damage may occur
if parts of the body or loose items
get caught in moving parts. Never
operate the unit with the belt guard
removed. the belt guard should
be removed only when the air
compressor is turned off the spark
plug wire is disconnected.
Belt Guard – Removal
1. Disconnect the spark plug wire on
the engine and release all air tank
pressure.
2. (Refer to figure) Remove the four
screws (A) from the belt guard.
The belt guard can now be
removed.
Belt – Replacement
1. Disconnect the spark plug wire on
the engine and release all air tank
pressure.
2. Remove the belt guard as
previously described.
3. Mark engine position on saddle.
4. Loosen stiffener bracket screws
on engine.
A13567
A
C
3 Pound Force
At Midpoint
1/4 Inch
Deflection