Troubleshooting
3A3442B
11
Troubleshooting
NOTE:
Check all possible problems and causes before
disassembling the air motor.
Relieve the pressure
before checking or servicing
the equipment.
Problem
Cause
Solution
Air motor will not run.
Damaged air valve (214).
Replace or service the air valve (214).
See page 5.
Damaged pilot valve (213).
Replace the pilot valves (213). See page
7.
Air continuously exhausting around air
motor piston rod.
Damaged u-cups (207).
Replace the piston rod u-cups (207).
See page 9.
Air continuously exhausting from muf-
fler.
Damaged air valve plate (305) or cup
(312).
Replace or service the air valve (214).
See page 5.
Air motor “bounces” at top of stroke.
Damaged bottom pilot valve (213).
Replace the bottom pilot valve (213).
See page 7.
Air motor “bounces” at bottom of
stroke.
Damaged top pilot valve (213).
Replace the top pilot valve (213). See
page 7.
Icing inside motor.
Air motor operating at high pressure or
high cycle rate.
Reduce the pressure, cycle rate, or duty
cycle of motor.
Reduce the dew point of compressed air
in the moisture coalescing filter.