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Inspect Air Lines and Fittings for Leaks
1.
Set the Auto/Off lever to OFF, unplug the unit, and relieve all air pressure from the air tank.
2.
Apply a soap solution to all air line fittings and connections/piping.
3.
Correct any leaks found.
IMPORTANT: Even minor leaks can cause the air compressor to overwork, resulting in a premature
breakdown or inadequate performance.
Air Compressor Head Bolts - Torqueing
The air compressor pump head bolts should be kept properly torqued. Check the torques of the head
bolts after the first five hours of operation. Torque to 14-16 ft./lb. (19-22 Nm).
Service and Adjustments
ALL MAINTENANCE AND REPAIR OPERATIONS NOT LISTED MUST BE PERFORMED BY TRAINED
SERVICE TECHNICIAN.
To Replace or Clean Check Valve
1.
Release all air pressure from the air tank. See
Draining Air Tank
in the
Maintenance
section.
2.
Set the Auto/Off lever to OFF, unplug the unit, and relieve all air
pressure from the air tank.
3.
Using an adjustable wrench, loosen the outlet tube nut at air
tank and pump. Carefully move the outlet tube away from the
check valve.
4.
Using an adjustable wrench, loosen the pressure relief tube nut
at the air tank. Carefully move the pressure relief tube away
from the check valve.
5.
Unscrew the check valve (turn counter-clockwise) 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 the nuts.
10.
Replace the outlet tube and tighten the nuts.
11.
Perform the Break-in Procedure. See the
Break-in Procedure
section in
How to Use Your Unit
.
⚠
WARNING
•
Risk of bursting.
Do not drill into, weld, or otherwise modify air tank or it will weaken. The air tank
can rupture or explode.
Figure M
