14- ENG
Westward Operating Instructions and Parts Manual
Model 4YD76A
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 outfit.
3.
Remove the hose by removing
the hose clamp.
Check
Valve
NOTE:
The hose clamp is not
reusable. You must purchase a new
hose clamp, see the Parts List or
purchase a standard hose clamp at a
local hardware store.
4.
Unscrew the check valve (turn
counterclockwise) using a socket
wrench.
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 hose and new hose
clamp.
8.
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 REGULATOR
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 quick connect from the
regulator.
Outlet
Pressure
Gauge
Quick
Connect
Regulator
