Westward 3JR70A User Manual [en, es, fr]
Westward Operating Instructions and Parts Manual Model 3JR70A
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.
Portable Air Compressor
Description
Oil free air compressor for use in the home with a 50/50 duty cycle. The 3
gallon air compressor is designed for durability and low maintenance. Includes
check valve, pressure switch, safety valve, gauges, regulator, hose, and tire
chuck.
Unpacking
Grasp handle and lift the air
compressor out of the carton.
Remove all packaging from air
compressor and discard. 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
Max.
Model
3JR70A
Pressure
135
Dimensions
Length
27.75"
DEV002
A08588
Printed in U.S.A.
7/05 r1
Width
10.50"
Tank Size
(gallons)
3
Height
16"
Current
Required
10 AMP
Weight
32 lbs.
Volts/Hertz/
Phase
120/60/1
SCFM@40
PSIG
3.7
SCFM@90
PSIG
2.6
Westward Operating Instructions and Parts Manual Model 3JR70A
Portable Air Compressor
Safety Guidelines Definitions
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 sections.
Indicates a
potentially
hazardous 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
hazardous 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 equipment if ignored.
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.
2- ENG
Westward Operating Instructions and Parts Manual Model 3JR70A
Portable Air Compressor
SAVE THESE INSTRUCTIONS
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.
HAZARD
RISK OF EXPLOSION OR FIRE
WHAT CAN 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.
HOW TO PREVENT IT
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.
3- ENG
Westward Operating Instructions and Parts Manual Model 3JR70A
Portable Air Compressor
HAZARD
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.
1. FAILURE TO PROPERLY DRAIN
WHAT CAN HAPPEN
CONDENSED WATER FROM THE
TANK, CAUSING RUST AND THINNING
OF THE STEEL TANK.
2. MODIFICATIONS OR ATTEMPTED
REPAIRS TO THE TANK.
3. UNAUTHORIZED MODIFICATIONS TO
THE UNLOADER VALVE, SAFETY
VALVE, OR ANY OTHER COMPONENTS
WHICH CONTROL TANK PRESSURE.
4. EXCESSIVE VIBRATION CAN WEAKEN
THE AIR TANK AND CAUSE RUPTURE
OR EXPLOSION.
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
DRAIN TANK DAILY OR AFTER EACH USE.
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 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 LOWPRESSURE OBJECTS SUCH AS CHILDREN’S
TOYS, FOOTBALLS, BASKETBALLS, ETC.
4- ENG
Westward Operating Instructions and Parts Manual Model 3JR70A
Portable Air Compressor
HAZARD
RISK FROM FLYING OBJECTS
WHAT CAN HAPPEN
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.
HAZARD
RISK OF ELECTRICAL SHOCK
WHAT CAN HAPPEN
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.
HOW TO PREVENT IT
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.
HOW TO PREVENT IT
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.
5- ENG
Westward Operating Instructions and Parts Manual Model 3JR70A
Portable Air Compressor
HAZARD
RISK TO BREATHING
WHAT CAN 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.
SPRAYED MATERIALS SUCH AS PAINT,
PAINT SOLVENTS, PAINT REMOVER,
INSECTICIDES, AND WEED KILLERS, MAY
CONTAIN HARMFUL VAPORS AND POISONS.
HAZARD
RISK OF BURNS
WHAT CAN HAPPEN
TOUCHING EXPOSED METAL, SUCH AS THE
COMPRESSOR HEAD OR OUTLET TUBES,
CAN RESULT IN SERIOUS BURNS.
HOW TO PREVENT IT
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 CROSSVENTILATION. READ AND FOLLOW THE
SAFETY INSTRUCTIONS PROVIDED ON
THE LABEL OR SAFETY DATA SHEETS FOR
THE MATERIAL YOU ARE SPRAYING. USE
A NIOSH/MSHA APPROVED RESPIRATOR
DESIGNED FOR USE WITH YOUR SPECIFIC
APPLICATION.
HOW TO PREVENT IT
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.
6- ENG
Westward Operating Instructions and Parts Manual Model 3JR70A
Portable Air Compressor
HAZARD
RISK FROM MOVING PARTS
WHAT CAN HAPPEN
MOVING PARTS SUCH AS THE PULLEY,
FLYWHEEL AND BELT CAN CAUSE
SERIOUS INJURY 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 RESULT IN SERIOUS INJURY.
NEVER OPERATE THE COMPRESSOR WITH
GUARDS OR COVERS WHICH ARE DAMAGED
OR REMOVED.
ANY REPAIRS REQUIRED ON THIS PRODUCT
SHOULD BE PERFORMED BY AUTHORIZED
SERVICE CENTER PERSONNEL.
HOW TO PREVENT IT
HAZARD
RISK OF FALLING
WHAT CAN HAPPEN
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.
HOW TO PREVENT IT
HAZARD
RISK OF PROPERTY DAMAGE WHEN TRANSPORTING COMPRESSOR
(Fire, Inhalation, Damage to Vehicle Surfaces)
WHAT CAN HAPPEN
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.
HOW TO PREVENT IT
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.
7- ENG
Westward Operating Instructions and Parts Manual Model 3JR70A
Portable Air Compressor
HAZARD
RISK OF UNSAFE OPERATION
WHAT CAN HAPPEN
UNSAFE OPERATION OF YOUR AIR
COMPRESSOR COULD LEAD TO SERIOUS
INJURY OR DEATH TO YOU OR OTHERS.
HOW TO PREVENT IT
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.
8- ENG
Westward Operating Instructions and Parts Manual Model 3JR70A
Portable Air Compressor
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.
GROUNDING INSTRUCTIONS
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
equipped 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 USE
AN ADAPTER. See illustration.
Plug
Grounded
Outlets
Grounding Pin
3. Inspect the plug and cord before
each use. Do not use if there are
signs of damage.
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 qualified 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.
9- ENG
Westward Operating Instructions and Parts Manual Model 3JR70A
Portable Air Compressor
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.)
VOLTAGE AND CIRCUIT
PROTECTION
Refer to the specifications for the
voltage and minimum branch circuit
requirements.
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 equipped 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
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.
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).
10- ENG
Westward Operating Instructions and Parts Manual Model 3JR70A
Portable Air Compressor
Tank Pressure Gauge
Pressure
Switch
On/
Auto/Off
Switch
Safety
Valve
Description of Operation (continued)
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 equal 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.
Turn the knob clockwise to increase
pressure and counterclockwise to
decrease pressure.
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.
Outlet
Pressure
Gauge
Regulator
Cooling System (not shown)
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.
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.
: This
Drain Valve
Check Valve
11- ENG
Westward Operating Instructions and Parts Manual Model 3JR70A
Portable Air Compressor
HOW TO STOP
1. Set the On/Auto/Off lever to
"OFF".
BEFORE FIRST START-UP
Serious damage
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.
NOTE: Pull coupler back until it clicks
to prevent air from escaping through
the quick 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
(counter-clockwise) 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.
6. After 15 minutes, close the
drain valve (clockwise). The
air receiver will fill to "cut-out"
pressure and the motor will stop.
will stop.
The compressor is now ready for use.
may result if the
BEFORE EACH START-UP
1. Place On/Auto/Off lever to "OFF".
2. Turn the regulator knob
counterclockwise to set the outlet
pressure to zero.
3. Attach hose and accessories.
NOTE: The hose or accessory
will require a quick connect plug
if the air outlet is equipped with a
quick connect socket.
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.
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. Turn regulator knob clockwise to
increase pressure and stop when
desired pressure is reached.
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.
12- ENG
Westward Operating Instructions and Parts Manual Model 3JR70A
Portable Air Compressor
Maintenance
CUSTOMER RESPONSIBILITIES
Before
each
use
Check Safety Valve
Drain Tank
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.
NOTE: See "Operation" section for
the location of controls.
TO CHECK SAFETY VALVE
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.
●
Unit cycles
automatically when
If the safety valve
does not work
Daily
or after
each
use
●
TO DRAIN TANK
1. Set the On/Auto/Off lever to
"OFF".
2. Turn the regulator knob
counterclockwise 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 (counterclockwise) 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.
6. After the water has been drained,
close the drain valve. The air
compressor can now be stored.
NOTE: If drain valve is plugged in,
release all air pressure. The valve
can then be removed, cleaned, and
reinstalled.
13- ENG
Westward Operating Instructions and Parts Manual Model 3JR70A
Portable Air Compressor
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 MUST
BE PERFORMED BY A TRAINED
SERVICE TECHNICIAN.
TO REPLACE OR CLEAN CHECK
VALVE
1. Release all air pressure from air
tank. See "To Drain Tank" in the
Maintenance section.
2. Unplug unit.
3. Loosen the nut on the outlet tube
and move the outlet tube to the
side.
4. Unscrew the check valve (turn
counterclockwise) using a socket
wrench.
Outlet Tube
Nut
Check
Valve
5. Make sure the valve disc moves
freely inside the check valve
and the spring holds the disc in
the upper, closed position. The
check valve may be cleaned
with a solvent, such as paint and
varnish remover.
Screwdriver
In open
position
nothing is
visible.
In closed position
disc is visible.
6. Apply sealant to the check valve
threads. Reinstall the check valve
(turn clockwise).
7. Replace the outlet tube and
tighten the nut.
8. Perform the Break-in Procedure.
See "Break-in Procedure" in the
Operation section.
TO REPLACE REGULATOR
1. Release all air pressure from air
tank. See "To Drain Tank" in the
Maintenance section.
2. Unplug unit.
3. Using an adjustable wrench
remove the gauges and quick
connect from the regulator.
4. Remove the regulator.
5. Apply pipe sealant tape to the
nipple on the standpipe.
6. Assemble the regulator and
orient as shown.
14- ENG
Westward Operating Instructions and Parts Manual Model 3JR70A
Portable Air Compressor
To Replace Regulator (continued)
NOTE: Arrow indicates flow of
air. Make sure it is pointing in the
direction of air flow.
Regulator
Arrow
7. Reapply pipe sealant to gauges
and quick connect.
8. Reassemble gauges and quick
connect. Orient gauges to read
correctly. Tighten quick connect
with wrench.
Storage
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.
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.
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, and
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. (If so
equipped)
Store the air compressor in a clean
and dry location.
15- ENG
Westward Operating Instructions and Parts Manual Model 3JR70A
Portable Air Compressor
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
Symptom (s) Possible Causes (s) Corrective Actions (s)
Excessive tank
pressure - safety
valve pops off.
1. Pressure switch does
not shut off motor when
compressor reaches
"cut-out" pressure.
1. Move On/Auto/Off lever
to the "OFF" position. If
the outfit does not shut
off contact a trained
service technician.
Air leaks at
fittings.
Air leaks in air
tank or at air
tank welds.
Air leaks
between head
and valve plate.
Air leak from
safety valve.
Knocking Noise.
2. Pressure switch "cutout" too high.
1. Tube fittings are not
tight enough.
1. Defective air tank. 1. Air tank must be
1. Leaking seal.
1. Possible defect in
safety valve.
1. Possible defect in safety
valve.
2. Contact a trained service
technician.
1. Tighten fittings where air
can be heard escaping.
Check fittings with soapy
water solution. Do Not
Overtighten.
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. Contact a trained service
technician.
1. Operate safety valve
manually by pulling on
ring. If valve still leaks, it
should be replaced.
1. Operate safety valve
manually by pulling on
ring. If valve still leaks, it
should be replaced.
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Westward Operating Instructions and Parts Manual Model 3JR70A
Portable Air Compressor
Symptom (s) Possible Causes (s) Corrective Actions (s)
Pressure reading
on the regulated
pressure gauge
drops when an
accessory is
used.
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).
Compressor is not
supplying enough
air to operate
accessories.
Regulator knob
has continuous
air leak.
Regulator will
not shut off air
outlet.
1. Prolonged excessive use
of air.
2. Compressor is not
large enough for air
requirement.
3. Hole in hose.
4. Check valve restricted.
5. Air leaks.
1. Damaged regulator 1. Replace
1. Damaged regulator 1. Replace
1. Decrease amount of air
usage.
2. Check the accessory
air requirement. If it is
higher than the SCFM
or pressure supplied
by your air compressor,
you need a larger
compressor.
3. Check and replace if
required.
4. Remove and clean, or
replace.
5. Tighten fittings.
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Westward Operating Instructions and Parts Manual Model 3JR70A
Portable Air Compressor
Symptom (s) Possible Causes (s) Corrective Actions (s)
Motor will not
run.
1. Fuse blown, circuit
breaker tripped.
2. Extension cord is wrong
length or gauge.
3. Loose electrical
connections.
1a. Check fuse box for
blown fuse and replace
as necessary.
Reset circuit breaker. Do
not use a fuse or circuit
breaker with higher
rating than that specified
for your particular branch
circuit.
b. Check for proper fuse.
You should use a time
delay fuse.
c. Check for low voltage
problem.
d. Check the extension
cord.
e. Disconnect the other
electrical appliances from
circuit or operate the
compressor on its own
branch circuit.
2. Check the extension
cord.
3. Check wiring connection
inside terminal box.
4. Faulty motor.
4. Have checked by
a trained service
technician.
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Westward Operating Instructions and Parts Manual Model 3JR70A
Portable Air Compressor
LIMITED WARRANTY
WESTWARD ONE-YEAR LIMITED WARRANTY. Westward Air Compressors, Models
covered in this manual, are warranted by Westward to the original user against defects
in workmanship or materials under normal use for one year after date of purchase. Any
part which is determined to be defective in material or workmanship and returned to an
authorized service location, as Westward designates, shipping costs prepaid, will be, as
the exclusive remedy, repaired or replaced at Westward’s option. For limited warranty
claim procedures, see PROMPT DISPOSITION below. This limited warranty gives
purchasers specific legal rights, which vary from jurisdiction to jurisdiction.
LIMITATION OF LIABILITY. To the extent allowable under applicable law, Westward’s
liability for consequential and incidental damages is expressly disclaimed. Westward’s
liability in all events is limited to and shall not exceed the purchase price paid.
WARRANTY DISCLAIMER. Westward has made a diligent effort to provide product information and illustrate the products in this literature accurately; however, such information
and illustrations are for the sole purpose of identification, and do not express or imply a
warranty that the products are MERCHANTABLE, or FIT FOR A PARTICULAR PURPOSE,
or that the products will necessarily conform to the illustrations or descriptions. Except
as provided below, no warranty or affirmation of fact, expressed or implied, other than as
stated in the "LIMITED WARRANTY" above is made or authorized by Westward.
PRODUCT SUITABILITY. Many jurisdictions have codes and regulations governing sales,
construction, installation, and/or use of products for certain purposes, which may vary from
those in neighboring areas. While Westward attempts to assure that its products comply
with such codes, it cannot guarantee compliance, and cannot be responsible for how the
product is installed or used. Before purchase and use of a product, review the product
applications, and all applicable national and local codes and regulations, and be sure that
the product, installation, and use will comply with them.
Certain aspects of disclaimers are not applicable to consumer products; e.g., (a) some
jurisdictions do not allow the exclusion or limitation of incidental or consequential
damages, so the above limitation or exclusion may not apply to you; (b) also, some jurisdictions do not allow a limitation on how long an implied warranty lasts, consequently the
above limitation may not apply to you; and (c) by law, during the period of the Limited
Warranty, any implied warranties of implied merchantability or fitness for a particular
purpose applicable to consumer products purchased by consumers, may not be excluded
or otherwise disclaimed.
PROMPT DISPOSITION. Westward will make a good faith effort for prompt correction or
other adjustment with respect to any product, which proves to be defective within limited
warranty. For any product believed to be defective within limited warranty, first write or call
dealer from whom the product was purchased. Dealer will give additional directions. If
unable to solve satisfactorily, write to Westward at address below, giving dealer’s name,
address, date, and number of dealer’s invoice, and describing the nature of the defect.
Title and risk of loss pass to buyer on delivery to common carrier. If product was damaged
in transit to you, file claim with carrier.
Manufactured for Grainger International Inc.,
100 Grainger Parkway, Lake Forest, Illinois 60045 U.S.A.
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Westward Operating Instructions and Parts Manual Model 3JR70A
Portable Air Compressor
For Repair Parts, call 1-800-323-0620
24 hours a day - 365 days a year
Please provide the following:
- Model Number
- Serial Number (if any)
- Part description and number as shown on parts list
Address parts correspondence to:
Grainger Parts
P.O. Box 3074
1657 Shermer Road
Northbrook, IL 60065-3074 U.S.A.
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Westward Operating Instructions and Parts Manual Model 3JR70A
Portable Air Compressor
Repair Parts List
Key No Description Part Number Qty.
1 Drain Valve A06891 1
2 Screw 1/4 - 20 x .750 91895680 4
3 Recess Rubber Bumper SST-5314-1 4
4 Check Valve D24879 1
5 Nut Sleeve SSP-473 1
8 Pump Assembly -------- 1
9 Screw 1/4 - 14 x .625 SSF-621 2
10 Pump Isolator CAC-1254 4
11 Nipple 1/4-18 NPT x 2.50 SSP-480 1
12 Pressure Switch Z-D27227 1
13 Safety Valve D20114 1
14 Gauge 2" Z-GA-373 2
15 Bushing Reducer 1/8-1/4NP SSP-6021 1
17 Nipple 1/4-18 NPT x 1.5 SS-1286 1
18 Regulator CAC-4296-1 1
19 Adapter 1/4 NPT x 1/4 NPSM D26889 1
23 Cord Assembly D26618 1
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Westward Operating Instructions and Parts Manual Model 3JR70A
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Torqu
e
49-55 in.-lbs
.
Torque
30-45 in.-lbs
.
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35-12
35-8
35-9
35-10
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38
46
49
39
Torque
30 ft.-lbs.
Portable Air Compressor
For Repair Parts, call 1-800-323-0620
24 hours a day - 365 days a year
Please provide the following:
- Model Number
- Serial Number (if any)
- Part description and number as shown on parts list
Address parts correspondence to:
Grainger Parts
P.O. Box 3074
1657 Shermer Road
Northbrook, IL 60065-3074 U.S.A.
** REPLACEMENT BRUSHES FOR MOTOR
Motor number and vendor is stamped on motor stack. Both must be
identified before ordering replacement brush. Motor part number for
reference only. Motor not available for service.
Motor Vendor Brush Set
M0-9088 Northland Z-D20041
D23494 GS Electric (Ametek) Z-D23825
D29398 GS Electric (Ametek) Z-D23825
D30106 GS Electric (Ametek) Z-D23825
D27098 ECM (Gold Tuning) Z-D27196
22- ENG
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