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16 - ENGD23269
SERVICE AND ADJUSTMENTS
Unit cycles automatically when power is on. When doing
Maintenance, you may be exposed to voltage sources, com-
pressed 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 TRAINED SERVICE TECHNICIAN.
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.
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 pres-
sure relief tube away from check valve.
5. Unscrew the check valve (turn coun-
terclockwise) 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 the
valve disc in the closed position, if not
the check valve needs to be cleaned or replaced.
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.
In closed position disc is visible.
In open position nothing is visible.
Screwdriver
Outlet Tube
Nuts
Nut
Pressure
Relief Tube
Check
Valve
Nut