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Unit cycles
automatically
when
power is on. When performing
adjustments
or repair, you may be
exposed to voltage sources,
compressed
air or moving parts.
Personal injuries can occur. Before
performing any adjustments
or
repair, unplug the compressor and
bleed off all air pressure.
ALL SERVICE AND REPAIR
OPERATIONS NOT DESCRIBED
IN
THIS MANUAL MUST BE
PERFORMED
BY A TRAINED
SERVICE TECHNICIAN.
Before servicing:
•
Unplug or disconnect electrical
supply to the air compressor.
•
Bleed air 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 Air tank" in
the Maintenance
section.
2.
Unplug unit.
3.
Using an adjustable
wrench,
loosen outlet tube nut at air tank
and pump. Carefully move outlet
tube away from check valve.
4.
Using an adjustable wrench,
loosen pressure relief tube nut at
air tank and pressure switch.
Carefully move pressure relief
tube away from check valve.
5.
Unscrew the check valve (turn
counterclockwise)
using a 7/8 "
open end wrench. Note the
orientation for reassembly.
6.
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 it in the
closed position; if valve disc is
not moving freely the check valve
needs to be cleaned or replaced.
position
nothing is
visible.
In closed position
disc is visible.
7.
Clean or replace the check valve.
A solvent, such as paint or
varnish remover can be used to
clean the check valve.
8.
Apply sealant to the check valve
threads. Reinstall the check valve
(turn clockwise).
9.
Replace the pressure release
tube. Tighten nuts.
10. Replace the outlet tube and
tighten nuts.
11. Perform the Break-in Procedure.
See "Break-in Procedure" in the
Operation section.
D24917
20-ENG
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