SERVICE AND ADJUSTMENTS
ALL MAINTENANCE AND REPAIR OPERATIONS NOT LISTED MUST BE PERFORMED BY TRAINED SERVICE TECHNICIAN.
Risk of Unsafe Operation. Unit cycles automatically when power is on. When servicing, you may be exposed to
voltage sources, compressed air, or moving parts. Before servicing unit unplug or disconnect electrical supply to the air compressor, bleed tank of pressure, and 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 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.
Elbow Fitting
Nuts
Check
Valve
Outlet Tube
Pressure Relief Tube
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.
Screwdriver
In open position
nothing is visible.
In closed position disc is visible.
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
D28301 | 20- ENG |
