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.
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
19- ENG | D28914 |