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AH maintenance and repair
operations not misted must be
performed by Trained Service
Technician,
Risk of Unsafe
Operation, Unit
cycmes automaticaBly when power
}s on, When serv{c{ng, you may
be exposed to vomtage sources,
compressed ai5 or moving parts,
Before servicing unit unplug or
d}sconnect electr{cai supply to
the a}r compressor, bmeed tank
of pressure, and allow the a}r
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.
2. Set the On/Auto/Off lever to "Off"
and unptug unit.
3. Using an adjustable wrench,
loosen outlet tube nut at air tank
and pump. Carefully move outlet
tube away from check valve.
5. Unscrew the check valve (turn
counterclockwise) using a 7/8"
open end wrench. Note the
orientation for reassembty.
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 the check valve needs to be
cleaned or replaced.
i
H _ Screwdriver
m
In open ........"_' _
position
nothing is
visible.
In closed position
disc is vieibme.
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.
Using an adiustable wrench,
loosen pressure relief tube nut
at air tank and pressure switch.
Carefully move pressure relief
tube away from check valve.
A09707 18_ ENG
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