Westward 3JR71 Service manual

Westward Operating Instructions and Parts Manual Model 3JR71
Portable Air Compressor
Please read and save these instructions. Read through this owners
manual carefully before using product. Protect yourself and others by
observing all safety information, warnings, and cautions. Failure to
comply with instructions could result in personal injury and/or damage to
product or property. Please retain instructions for future reference.
Description
Low maintenance, oil-less portable air compressor designed for use in the home
with a 50/50 duty cycle. The 20 gallon capacity air tank is e uipped with check
valve, unloader valve, pressure switch, safety valve air regulator, and tank
pressure gauge.
npacking
Remove unit from carton and
discard all packaging. Save all
literature.
After unpacking unit, inspect
carefully for any damage that
may have occurred during
transit. Check for loose,
missing, or damaged parts.
Shipping damage claim must
be filed with carrier.
Specifications
Length Width Height Shipping Weight
Dimensions
DEV005
D24650
Printed in U.S.A.
4/02 r2
33.38" 16.63" 31.75" 142 lbs.
Model
3JR71
Max.
Pressure
135
SCFM@40
PSIG
8.3
SCFM@90
PSIG
5.8
Current
Required
15 AMP
Volts/Hertz/
Phase
120/60/1
Tank Size
(gallons)
20

2- ENG
Westward Operating Instructions and Parts Manual Model 3JR71
Portable Air Compressor
Safety Guidelines -
Definitions
Indicates a
potentially
ha ardous situation which, if not
avoided, may result in minor or
moderate injury.
Indicates a
potentially
hazardous situation which, if not
avoided, could result in death or
serious injury.
Indicates an
imminently
ha ardous situation which, if not
avoided, will result in death or
serious injury.
NOTE: Indicates special instructions,
which are important but not related to
hazards.
IMPORTANT: Indicates factors
concerned with assembly, installation,
operation, or maintenance, which
could result in damage to the machine
or e uipment if ignored.
This manual contains information that
is important for you to know and
understand. This information relates
to protecting YO R SAFETY and
PREVENTING EQ IPMENT
PROBLEMS. To help you recognize
this information, we use the symbols
below. Please read the manual and
pay attention to these sections.
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
when using such tools:
 work in a well ventilated area
 work with approved safety
equipment
 always wear MSHA/NIOSH
approved, properly fitting face
mask or respirator.
When using air tools, basic safety
precautions should always be
followed to reduce the risk of
personal injury.

Portable Air Compressor
3- ENG
Westward Operating Instructions and Parts Manual Model 3JR71
SAVE THESE INSTR CTIONS
IMPROPER OPERATION OR MAINTENANCE OF THIS PRODUCT COULD RESULT IN
SERIOUS INJURY AND PROPERTY DAMAGE. READ AND UNDERSTAND ALL
WARNINGS AND OPERATING INSTRUCTIONS BEFORE USING THIS EQUIPMENT.
RISK OF EXPLOSION OR FIRE
ALWAYS OPERATE THE COMPRESSOR IN A
WELL VENTILATED AREA FREE OF
COMB STIBLE 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
SEC RE 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
OBSTR CTION THAT WOULD RESTRICT THE
FLOW OF FRESH AIR TO THE VENTILATION
OPENINGS.
OPERATE COMPRESSOR IN A CLEAN, DRY,
WELL VENTILATED AREA. DO NOT OPERATE
NIT INDOORS OR IN ANY CONFINED AREA.
ALWAYS REMAIN IN ATTENDANCE WITH THE
PRODUCT WHEN IT IS OPERATING.
ALWAYS DISCONNECT ELECTRICAL POWER
BY MOVING PRESS RE SWITCH LEVER TO
THE OFF POSITION AND DRAIN TANK DAILY
OR AFTER EACH SE.
HOW TO PREVENT IT
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,
CA SING FIRE OR EXPLOSION.
RESTRICTING ANY OF THE COMPRESSOR
VENTILATION OPENINGS WILL CAUSE
SERIOUS OVERHEATING AND CO LD
CA SE FIRE.
NATTENDED OPERATION OF THIS
PRODUCT CO LD RES LT IN PERSONAL
INJ RY OR PROPERTY DAMAGE. TO
RED CE THE RISK OF FIRE, DO NOT ALLOW
THE COMPRESSOR TO OPERATE
NATTENDED.
WHAT CAN HAPPEN
HAZARD

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Westward Operating Instructions and Parts Manual Model 3JR71
Portable Air Compressor
HAZARD
RISK OF B RSTING
AIR TANK: THE FOLLOWING CONDITIONS CO LD LEAD TO A WEAKENING OF THE
TANK, AND RES LT IN A VIOLENT TANK EXPLOSION AND CO LD CA SE
PROPERTY DAMAGE OR SERIO S INJ RY.
HOW TO PREVENT IT
WHAT CAN HAPPEN
DRAIN TANK DAILY OR AFTER EACH SE. IF
TANK DEVELOPS A LEAK, REPLACE IT
IMMEDIATELY WITH A NEW TANK OR
REPLACE THE ENTIRE COMPRESSOR.
NEVER DRILL INTO, WELD, OR MAKE ANY
MODIFICATIONS TO THE TANK OR ITS
ATTACHMENTS.
THE TANK IS DESIGNED TO WITHSTAND
SPECIFIC OPERATING PRESSURES. NEVER
MAKE ADJ STMENTS OR PARTS
S BSTIT TIONS TO ALTER THE FACTORY
SET OPERATING PRESS RES.
FOR ESSENTIAL CONTROL OF AIR
PRESSURE,YO M ST INSTALL A
PRESS RE REG LATOR AND PRESS RE
GA GE TO THE AIR O TLET (IF NOT
EQ IPPED) OF YOUR COMPRESSOR.
FOLLOW THE EQUIPMENT MANUFACTURERS
RECOMMENDATION AND NEVER EXCEED
THE MAXIMUM ALLOWABLE PRESSURE
RATING OF ATTACHMENTS. NEVER SE
COMPRESSOR TO INFLATE SMALL LOW-
PRESS RE OBJECTS S CH AS CHILDRENS
TOYS, FOOTBALLS, BASKETBALLS, ETC.
1. FAIL RE TO PROPERLY DRAIN
CONDENSED WATER FROM THE
TANK, CA SING R ST AND THINNING
OF THE STEEL TANK.
2. MODIFICATIONS OR ATTEMPTED
REPAIRS TO THE TANK.
3. NA THORIZED MODIFICATIONS TO
THE NLOADER VALVE, SAFETY
VALVE, OR ANY OTHER COMPONENTS
WHICH CONTROL TANK PRESS RE.
4. EXCESSIVE VIBRATION CAN WEAKEN
THE AIR TANK AND CA SE R PT RE
OR EXPLOSION.
ATTACHMENTS & ACCESSORIES:
EXCEEDING THE PRESS RE RATING OF
AIR TOOLS, SPRAY GUNS, AIR OPERATED
ACCESSORIES, TIRES AND OTHER
INFLATABLES CAN CA SE THEM TO
EXPLODE OR FLY APART, AND COULD
RESULT IN SERIOUS INJURY.

Portable Air Compressor
5- ENG
Westward Operating Instructions and Parts Manual Model 3JR71
HAZARD
RISK OF ELECTRICAL SHOCK
HOW TO PREVENT IT
WHAT CAN HAPPEN
YOUR AIR COMPRESSOR IS POWERED BY
ELECTRICITY. LIKE ANY OTHER
ELECTRICALLY POWERED DEVICE, IF IT IS
NOT SED PROPERLY, IT MAY CA SE
ELECTRIC SHOCK.
REPAIRS ATTEMPTED BY NQ ALIFIED
PERSONNEL CAN RES LT IN SERIO S
INJ RY OR DEATH BY ELECTROC TION.
ELECTRICAL GROUNDING: FAIL RE TO
PROVIDE ADEQ ATE GRO NDING TO THIS
PROD CT CO LD RES LT IN SERIO S
INJ RY OR DEATH FROM ELECTROC TION.
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 SHO LD BE
PERFORMED BY A THORIZED SERVICE
CENTER PERSONNEL IN ACCORDANCE
MAKE CERTAIN THAT THE ELECTRICAL
CIRC IT TO WHICH THE COMPRESSOR IS
CONNECTED PROVIDES PROPER
ELECTRICAL GRO NDING, CORRECT
VOLTAGE AND ADEQ ATE F SE
PROTECTION.
HAZARD
RISK FROM FLYING OBJECTS
HOW TO PREVENT IT
WHAT CAN HAPPEN
THE COMPRESSED AIR STREAM CAN
CA SE SOFT TISS E 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 T RN THE COMPRESSOR OFF AND
BLEED PRESS RE FROM THE AIR HOSE AND
TANK BEFORE ATTEMPTING MAINTENANCE,
ATTACHING TOOLS, OR ACCESSORIES.

6- ENG
Westward Operating Instructions and Parts Manual Model 3JR71
Portable Air Compressor
HAZARD
HOW TO PREVENT IT
WHAT CAN HAPPEN
RISK TO BREATHING
AIR OBTAINED DIRECTLY FROM THE
COMPRESSOR SHO LD NEVER BE SED TO
S PPLY AIR FOR H MAN CONS MPTION. IN
ORDER TO USE AIR PRODUCED BY THIS
COMPRESSOR FOR BREATHING, SUITABLE
FILTERS AND IN-LINE SAFETY EQ IPMENT
M ST BE PROPERLY INSTALLED. IN-LINE
FILTERS AND SAFETY EQ IPMENT USED IN
CONJUNCTION WITH THE COMPRESSOR
M ST BE CAPABLE OF TREATING AIR TO
ALL APPLICABLE LOCAL AND FEDERAL
CODES PRIOR TO H MAN CONS MPTION.
WORK IN AN AREA WITH GOOD CROSS-
VENTILATION. READ AND FOLLOW THE
SAFETY INSTR CTIONS PROVIDED ON THE
LABEL OR SAFETY DATA SHEETS FOR THE
MATERIAL YO ARE SPRAYING. SE A
NIOSH/MSHA APPROVED RESPIRATOR
DESIGNED FOR USE WITH YOUR SPECIFIC
APPLICATION.
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 CA SE SERIO S INJ RY OR DEATH.
SPRAYED MATERIALS SUCH AS PAINT,
PAINT SOLVENTS, PAINT REMOVER,
INSECTICIDES, AND WEED KILLERS, MAY
CONTAIN HARMF L VAPORS AND POISONS.
HAZARD
HOW TO PREVENT IT
WHAT CAN HAPPEN
RISK OF B RNS
TO CHING EXPOSED METAL, SUCH AS THE
COMPRESSOR HEAD OR OUTLET TUBES,
CAN RES LT IN SERIO S B RNS.
NEVER TO CH 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
NTIL NIT HAS BEEN ALLOWED TO COOL.

Portable Air Compressor
7- ENG
Westward Operating Instructions and Parts Manual Model 3JR71
HAZARD
HOW TO PREVENT IT
WHAT CAN HAPPEN
RISK FROM MOVING PARTS
NEVER OPERATE THE COMPRESSOR WITH
G ARDS OR COVERS WHICH ARE DAMAGED
OR REMOVED.
ANY REPAIRS REQUIRED ON THIS PRODUCT
SHO LD BE PERFORMED BY A THORIZED
SERVICE CENTER PERSONNEL.
MOVING PARTS SUCH AS THE PULLEY,
FLYWHEEL AND BELT CAN CA SE
SERIO S INJ RY IF THEY COME INTO
CONTACT WITH YOU OR YOUR CLOTHING.
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 RES LT IN SERIO S INJ RY.
HAZARD
HOW TO PREVENT IT
WHAT CAN HAPPEN
HAZARD
HOW TO PREVENT IT
WHAT CAN HAPPEN
RISK OF FALLING
A PORTABLE COMPRESSOR CAN FALL
FROM A TABLE, WORKBENCH OR ROOF
CA SING DAMAGE TO THE COMPRESSOR
AND CO LD RES LT IN SERIO S INJ RY
OR DEATH TO THE OPERATOR.
ALWAYS OPERATE COMPRESSOR IN A
STABLE SEC RE POSITION TO PREVENT
ACCIDENTAL MOVEMENT OF THE UNIT.
NEVER OPERATE COMPRESSOR ON A ROOF
OR OTHER ELEVATED POSITION. SE
ADDITIONAL AIR HOSE TO REACH HIGH
LOCATIONS.
RISK OF PROPERTY DAMAGE WHEN TRANSPORTING COMPRESSOR
OIL CAN LEAK OR SPILL CAUSING 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)

8- ENG
Westward Operating Instructions and Parts Manual Model 3JR71
Portable Air Compressor
HAZARD
HOW TO PREVENT IT
WHAT CAN HAPPEN
RISK OF NSAFE OPERATION
REVIEW AND NDERSTAND 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
FATIG ED OR NDER THE INFL ENCE OF
ALCOHOL OR DR GS. STAY ALERT AT ALL
TIMES.
NEVER DEFEAT THE SAFETY FEAT RES OF
THIS PRODUCT.
EQ IP AREA OF OPERATION WITH A FIRE
EXTING ISHER.
DO NOT OPERATE MACHINE WITH MISSING,
BROKEN, OR NA THORIZED PARTS.
NSAFE OPERATION OF YOUR AIR
COMPRESSOR CO LD LEAD TO SERIO S
INJ RY OR DEATH TO YO OR OTHERS.

Portable Air Compressor
9- ENG
Westward Operating Instructions and Parts Manual Model 3JR71
Installation
LOCATION OF THE AIR
COMPRESSOR
Locate the air compressor in a clean,
dry and well ventilated area. The air
compressor should be located at least
12" away from the wall or other
obstructions that will interfere with the
flow of air. The air compressor pump
and shroud are designed to allow for
proper cooling. The ventilation
openings on the compressor are
necessary to maintain proper
operating temperature. Do not place
rags or other containers on or near
these openings.The air filter must be
kept clear of obstructions which could
reduce air flow to the air compressor.
ASSEMBLE WHEELS
It will be necessary
to brace or support
one side of the outfit when
installing the wheels because the
compressor will have a tendency to
tip.
1. Attach wheels with shoulder bolts
and nuts as shown. NOTE: Place
the bolts in the bottom hole of the
wheel bracket on units 20-29
gallons and in the top hole on
units 30 gallons and up.
Rubber Strip
Screw
Nut
Wheel
Shoulder Bolt
1. To make installation easier,
submerge handle grip into warm
soapy water. Remove handle
grip from soapy water and slide
onto handle.
2. Insert the handle inside the
compressor saddle and line up
the two bolt holes on each side.
3. Install the four screws, two on
each side.
4. Tighten securely.
Handle
Assembly
TOOLS REQ IRED FOR
ASSEMBLY
1 - 9/16 socket or open end wrench
1 - 3/8 socket or open end wrench
2. Tighten securely. NOTE: The
outfit will sit level if the wheels
are properly installed.
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.
ASSEMBLE R BBER STRIP
1. Clean and dry underside of air
tank leg opposite wheels.
2. Remove the protective paper
strip from the adhesive backed
rubber foot strip.
3. Attach the rubber foot strip to the
bottom of leg. Press firmly into
place.

10- ENG
Westward Operating Instructions and Parts Manual Model 3JR71
Portable Air Compressor
GRO NDING INSTR CTIONS
RISK OF
ELECTRICAL
SHOCK. In the event of a short
circuit, grounding reduces the risk
of shock by providing an escape
wire for the electric current. This
air compressor must be properly
grounded.
The portable air compressor is
e uipped with a cord having a
grounding wire with an appropriate
grounding plug (see following
illustrations). The plug must be used
with an outlet that has been installed
and grounded in accordance with all
local codes and ordinances.
1. The cord set and plug with this
unit contains a grounding pin.
This plug MUST be used with a
grounded outlet.
IMPORTANT: The outlet being used
must be installed and grounded in
accordance with all local codes and
ordinances.
2. Make sure the outlet being used
has the same configuration as
the grounded plug. DO NOT SE
AN ADAPTER. See illustration.
3. Inspect the plug and cord before
each use. Do not use if there are
signs of damage.
Grounding Pin
Grounded
Outlets
Plug
4. If these grounding instructions
are not completely understood, or
if in doubt as to whether the
compressor is properly grounded,
have the installation checked by
a ualified electrician.
IMPROPER
GROUNDING
CAN RESULT IN ELECTRICAL
SHOCK.
Do not modify the plug provided. If
it does not fit the available outlet, a
correct outlet should be installed
by a qualified electrician.
Repairs to the cord set or plug
MUST be made by a qualified
electrician.
EXTENSION CORDS
Use extra air hose instead of an
extension cord to avoid voltage drop
and power loss to the motor, and to
prevent overheating.
If an extension cord must be used, be
sure it is:
 a 3-wire extension cord that has
a 3-blade grounding plug, and a
3-slot receptacle that will accept
the plug on the product
 in good condition
 no longer than 50 feet
 12 gauge (AWG) or larger. (Wire
size increases as gauge number
decreases. 10 AWG and 8 AWG
may also be used. DO NOT USE
14 OR 16 AWG.)

Portable Air Compressor
11- ENG
Westward Operating Instructions and Parts Manual Model 3JR71
VOLTAGE AND CIRC IT
PROTECTION
Refer to the specificaitons chart for
the voltage and minimum branch
circuit re uirements.
Certain air compressors can be
operated on a 15 amp circuit if the
following conditions are met.
1. Voltage supply through branch
circuit is 15 amps.
2. Circuit is not used to supply any
other electrical needs (lights,
appliances, etc.).
3. Extension cords comply with
specifications.
4. Circuit is e uipped with a 15 amp
circuit breaker or 15 amp time
delay fuse. NOTE: If compressor
is connected to a circuit protected
by fuses, use only time delay
fuses. Time delay fuses should
be marked D in Canada and T
in the US.
If any of the above conditions cannot
be met, or if operation of the
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.
Operation
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).
KNOW YO R 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.
Safety
Valve
On/Auto/Off
Switch
Regulator
Outlet
Pressure
Gauge
Tank
Pressure
Gauge
Pressure
Switch
niversal
Quick-
Connect
Body

12- ENG
Westward Operating Instructions and Parts Manual Model 3JR71
Portable Air Compressor
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 re uired 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.
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
after the unit
reaches cut-
out
pressure.
Check Valve
Pressure
Release
Valve
Outlet Pressure Gauge: The outlet
pressure gauge indicates the air
pressure available at the outlet side of
the regulator. This pressure is
controlled by the regulator and is
always less than or e ual to the tank
pressure.
Tank Pressure Gauge: The tank
pressure gauge indicates the reserve
air pressure in the tank.
Regulator: Controls the air pressure
shown on the outlet pressure gauge.
Pull the knob out and turn clockwise
to increase pressure and
counterclockwise to decrease
pressure. When the desired pressure
is reached push knob in to lock in
place.
niversal Quick-Connect Body:
The universal uick-connect body
accepts the three most popular styles
of uick-connect plugs: Industrial,
automotive (Tru-flate), and ARO. One
hand push-to-connect operation
makes connections simple and easy.
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.
Cooling System (not shown): This
compressor contains an advanced
design cooling system. At the heart of
this cooling system is an engineered
fan. It is perfectly normal for this fan
to blow air through the vent holes in
large amounts. You know that the
cooling system is working when air is
being expelled.
Drain
Valve

BEFORE FIRST START- P
Serious damage
may result if the
following break-in instructions are
not closely followed.
This procedure is re uired 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.
NOTE: If uick connect is installed,
pull coupler back until it clicks to
prevent air from escaping through the
uick connect.
2.
Plug the power cord into the
correct branch circuit receptacle.
(Refer to Voltage and Circuit
Protection paragraph in the
Installation section of this
manual.)
3. Open the drain valve fully
(counterclockwise) to permit air
to escape and prevent air
pressure build up in the air tank
during the break-in period.
NOTE: Always drain tank on a
washable surface or in a suitable
container to prevent damaging or
staining surfaces.
4. Move the On/Auto/Off lever to
"ON/AUTO" position. The
compressor will start.
5. Run the compressor for 15
minutes. Make sure the drain
valve is open and there is
minimal air pressure build-up in
tank.
Portable Air Compressor
13- ENG
Westward Operating Instructions and Parts Manual Model 3JR71
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. Pull the regulator knob out and
turn clockwise to increase
pressure. When the desired
pressure is reached push knob in
to lock in place. The compressor
is ready for use.
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 near the spray area.
BEFORE EACH START- P
1. Place On/Auto/Off lever to
OFF.
2. Pull regulator knob out, turn
counterclockwise until it stops.
Push knob in to lock in place.
3. Attach hose and accessories.
NOTE: The hose or accessory
will re uire a uick connect plug
if the air outlet is e uipped with a
uick connect.
6. After 15 minutes, close the drain
valve (clockwise). The air
receiver will fill to cut-out
pressure and the motor will stop.
The compressor is now ready for use.
Too much air
pressure causes a
ha ardous 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.
HOW TO STOP
1. Set the On/Auto/Off lever to
OFF.

14- ENG
Westward Operating Instructions and Parts Manual Model 3JR71
Portable Air Compressor
Maintenance
C STOMER RESPONSIBILITIES
NOTE: See Operation section for
the location of controls.
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.
Daily or
after
each
use
Before
each
use
●
●
Yearly
●1
1- more fre uent in dusty or humid conditions
Check Safety Valve
Drain Tank
Air Filter
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 re uire a greater
fre uency of all maintenance checks.
TO CHECK SAFETY VALVE
If the safety valve
does not work
properly, over-pressuri ation 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.
Air compressor pump intake
and exhaust valves ●
TO DRAIN TANK
1. Set the On/Auto/Off lever to
OFF.
2. Pull the regulator knob out and
turn clockwise to set the outlet
pressure to zero.
3. Remove the air tool or accessory.
4. Pull ring on safety valve allowing
air to bleed from the tank until
tank pressure is approximately 20
psi. Release safety valve ring.
5. Drain water from air tank by
opening drain valve (counter-
clockwise) on bottom of tank.
Fre uently

Portable Air Compressor
15- ENG
Westward Operating Instructions and Parts Manual Model 3JR71
To Drain Tank (continued)
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.
6. 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, the
reinstalled.
MOTOR
The motor has an automatic reset
thermal overload protector. If the
motor overheats for any reason, the
overload protector will shut off the
motor. The motor must be allowed to
cool down before restarting. The
compressor will automatically restart
after the motor cools.
If the overload protector shuts the
motor off fre uently, check for a
possible voltage problem. Low
voltage can also be suspected when:
1. The motor does not get up to full
power or speed.
2. Fuses blow out when starting the
motor; lights dim and remain dim
when motor is started and is
running.
AIR COMPRESSOR P MP INTAKE
AND EXHA ST VALVES
Once a year have a trained service
technician check the air compressor
pump intake and exhaust valves.
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 you use the
compressor pump, check the air filter
to be sure it is clean and in place.
If it is dirty, replace it with a new filter.
On some models,the filter may be
removed by using a pair of needle
nose pliers or a screwdriver. Pull or
pry out the old filter and carefully
clean the filter area. Push in the new
air filter.
Service and Adjustments
Unit cycles
automatically when
power is on. When doing
Maintenance, you may be exposed
to voltage sources, compressed air
or moving parts. Personal injuries
can occur. Before performing any
Maintenance or repair, unplug the
compressor and bleed off all air
pressure.
ALL MAINTENANCE AND REPAIR
OPERATIONS NOT LISTED M ST
BE PERFORMED BY A TRAINED
SERVICE TECHNICIAN.

16- ENG
Westward Operating Instructions and Parts Manual Model 3JR71
Portable Air Compressor
Service and Adjustments
(continued)
7. Using a screwdriver, carefully
push the valve disc up and down.
NOTE: The valve disc should
move freely up and down on a
spring which holds the valve disc
in the closed position, if not the
check valve needs to be cleaned
or replaced.
8. Clean or replace the check valve.
A solvent, such as paint or
varnish remover can be used to
clean the check valve.
9. Apply sealant to the check valve
threads. Reinstall the check valve
(turn clockwise).
10. Replace the pressure release
tube. Tighten nuts.
11. Replace the outlet tube and
tighten nuts.
12. Replace shrouds.
13. Perform the Break-in Procedure.
See Break-in Procedure in the
Operation section.
Before servicing:
 Unplug or disconnect electrical
supply to the air compressor.
 Bleed tank of pressure
 Allow the air compressor to
cool.
TO REPLACE OR CLEAN CHECK
VALVE
1. Release all air pressure from air
tank. See To Drain Tank in the
Maintenance section.
2. Unplug outfit.
3. Remove shrouds.
4. Using an adjustable wrench
loosen outlet tube nut at air tank
and pump. Carefully move outlet
tube away from check valve.
5. Using an adjustable wrench
loosen pressure relief tube nut at
air tank and pressure switch.
Carefully move pressure relief
tube away from check valve.
6. Unscrew the check valve (turn
counterclockwise) using a 7/8
open end wrench. Note the
orientation for reassembly.
Outlet Tube
Check
Valve
Nut
Nut
Pressure
Relief Tube
In closed position
disc is visible.
Screwdriver
TO REPLACE REG LATOR
1. Release all air pressure from air
tank. See To Drain Tank in the
Maintenance section.
2. Unplug outfit.
3. Using an adjustable wrench
remove the outlet pressure gauge
and uick connect from the
regulator.
In open position
nothing is visible.

Portable Air Compressor
17- ENG
Westward Operating Instructions and Parts Manual Model 3JR71
Storage
7. Reapply pipe sealant to outlet
pressure gauge and uick
connect.
8. Reassemble outlet pressure
gauge and uick connect. Orient
outlet pressure gauge to read
correctly. Tighten connect with
wrench.
4. Remove the regulator.
5. Apply pipe sealant tape to the
nipple on the standpipe.
6. Assemble the regulator and
orient as shown.
NOTE: Arrow indicates flow of air.
Make sure it is pointing in the
direction of air flow.
Nipple
Outlet
Pressure
Gauge
Quick
Connect
Regulator
Regulator
Regulator
Arrow
Before you store the air compressor,
make sure you do the following:
1. Review the "Maintenance"
section on the preceding pages
and perform scheduled
maintenance as necessary.
2. Set the On/Auto/Off lever to
OFF.
3. Turn the regulator
counterclockwise and set the
outlet pressure to zero.
4. Remove the air tool or accessory.
5. Pull ring on safety valve allowing
air to bleed from the tank until
tank pressure is approximately 20
psi. Release safety valve ring.
6. Drain water from air tank by
opening drain valve 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 or drain valve.
NOTE: If drain valve is plugged,
release all air pressure. The valve
can then be removed, cleaned, then
reinstalled.
8. Protect the electrical cord and air
hose from damage (such as
being stepped on or run over).
Wind them loosely around the
compressor handle.
Store the air compressor in a clean
and dry location.
To Replace Regulator (continued)

18- ENG
Westward Operating Instructions and Parts Manual Model 3JR71
Portable Air Compressor
Symptom (s) Possible Causes (s) Corrective Actions (s)
Voltage sources, moving parts, or compressed air sources
are exposed when repairing the compressor. Personal
injury can occur. Unplug the compressor before attempting any repairs.
Troubleshooting Chart
1. Pressure switch does
not shut off motor when
compressor reaches
cut-out pressure.
2. Pressure switch cut-
out too high.
1. Move On/Auto/Off lever
to the OFF position. If
the outfit does not shut
off contact a trained
service technician.
2. Contact a trained service
technician.
Excessive tank
pressure - safety
valve pops off.
1. Tube fittings are not
tight enough. 1. Tighten fittings where air can be heard escaping.
Check fittings with soapy
water solution. Do Not
Overtighten.
Air leaks at
fittings.
Air leaks at
pressure switch
release valve.
1. Defective pressure
switch release valve. 1. Contact a trained service
technician.
Air leaks at or
inside check
valve
1. Check valve seat
damaged. 1. A defective check valve results in a constant air
leak at the pressure
release valve when there
is pressure in the tank
and the compressor is
shut off. Replace check
valve. Refer to the To
Replace or Clean Check
Valve in the Service
and Adjustment section.
Air leaks in air
tank or at air
tank welds.
1. Air tank must be
replaced. Do not repair
the leak.
Do not drill
into, weld
or otherwise modify air
tank or it will weaken. The
tank can rupture or
explode.
1. Defective air tank.

Portable Air Compressor
19- ENG
Westward Operating Instructions and Parts Manual Model 3JR71
Symptom (s) Possible Causes (s) Corrective Actions (s)
Air leaks
between head
and valve plate.
1. Leaking seal. 1. Contact a trained service
technician.
1. Possible defect in safety
valve.
1. Operate safety valve
manually by pulling on
ring. If valve still leaks, it
should be replaced.
Knocking Noise.
1. It is normal for some
pressure drop to occur. 1. If there is an excessive
amount of pressure drop
when the accessory is
used, adjust the regulator
following the instructions in
the Description of
Operation paragraph in
the Operation Section.
NOTE: Adjust the regulated
pressure under flow conditions
(while accessory is being
used).
2. Defective check valve. 2. Remove and clean, or
replace.
Compressor is not
supplying enough
air to operate
accessories.
1. Prolonged excessive
use of air.
2. Compressor is not large
enough for air
re uirement.
3. Hole in hose.
4. Check valve restricted.
5. Air leaks.
6. Restricted air intake
filter
1. Decrease amount of air
usage.
2. Check the accessory air
re uirement. If it is higher
than the SCFM or pressure
supplied by your air
compressor, you need a
larger compressor.
3. Check and replace if
re uired.
4. Remove and clean, or
replace.
5. Tighten fittings.
6. Clean or replace air intake
filter. Do not operate the
air compressor with the
filter removed. Refer to the
Air Filter paragraph in the
Maintenance  section.
Pressure reading
on the regulated
pressure gauge
drops when an
accessory is
used.

20- ENG
Westward Operating Instructions and Parts Manual Model 3JR71
Portable Air Compressor
Regulator will
not shut off air
outlet.
1. Damaged regulator 1. Replace
1. Damaged regulator 1. Replace
Regulator knob
has continuous
air leak.
Symptom (s) Possible Causes (s) Corrective Actions (s)
Motor will not
run. 1. Motor overload
protection switch has
tripped
1. Let motor cool off and
overload switch will
automatically reset.
2. Tank pressure exceeds
pressure switch cut-in
pressure.
2. Motor will start
automatically when tank
pressure drops below
cut-in pressure of
pressure switch.
3. Extension cord is wrong
length or gauge. 3. Check for proper gauge wire and cord length.
5. Loose electrical
connections. 5. Check wiring connection inside pressure switch
and terminal box area.
6. Have checked by a
trained service
technician.
4. Check valve stuck open. 4. Remove and clean, or
replace.
6. Possible defective motor
or starting capacitor.
7. Have checked by a
trained service
technician. Do not
operate the compressor
in the paint spray area.
See flammable vapor
warning.
7. Paint spray on internal
motor parts.
8. Bleed the line by pushing
the lever on the pressure
switch to the off
position; if the valve
does not open, replace
switch.
8. Pressure release valve
on pressure switch has
not unloaded head
pressure.