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Westward Operating Instructions and Parts Manual Model 3JR70A
Portable Air Compressor
Service and Adjustments
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.
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.
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.
In closed position
disc is visible.
In open
position
nothing is
visible.
Screwdriver
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
Check
Valve
Nut
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.