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Unit cycles auto-
matically
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 SERVICE AND REPAIR OPERA=
TIONS NOT DESCRIBED iN THiS
MANUAL MUST BE PERFORMED
BY A TRAINED SERVICE TECHNI-
CIAN.
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.
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 ori-
entation 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 the valve
disc in the closed position; if not
moving freely the check valve
needs to be cleaned or replaced.
position
nothing
is
visible.
in closed
position
disc is visible.
2.
3.
Unplug unit.
Using an adjustable wrench,
loosen outlet tube nut at air tank
and pump. Carefully move outlet
tube away from check valve.
7.
Clean or replace the check valve.
A solvent, such as paint or var-
nish 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.
D24910
20- ENG
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