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17- ENG
D28299
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.
NOTE: If needed the top panel may be removed to make parts accessible.
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. Unscrew elbow fitting from the check valve (turn counterclockwise) using
an adjustable wrench. Note the orientation of the elbow fitting for
reassembly.
7. 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.
8. Clean or replace the check valve. A solvent, such as
paint or varnish remover can be used to clean the check
valve.
9. Apply sealant to the check valve threads. Reinstall the
check valve and elbow fitting (turn clockwise).
10. Replace the pressure release tube. Tighten nut.
11. Replace the outlet tube and tighten nut.
12. Perform the Break-in Procedure. See “Break-in Procedure” in the
Operation section.
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 TRAINED SERVICE TECHNICIAN.
Before servicing:
• Unplug or disconnect electrical supply to the air compressor.
• Bleed tank of pressure.
• Allow the air compressor to cool.
Pressure Relief Tube
Check
Valve
Nuts
Outlet Tube
Elbow Fitting
Screwdriver