Troubleshooting
14 311238G
Troubleshooting
Problem Cause Solution
Air motor will not run. DataTrak solenoid engaged. Dam-
aged main air valve spool or pop-
pets.
Rebuild main air valve. See page 16.
Replace poppets (12). See page 22.
Runaway occurred (DataTrak mod-
els only).
See Runaway on page 9.
Air continuously exhausting around
air motor shaft.
Damaged air motor shaft seal. Replace air motor shaft seal (7). See
page 20.
Air continuously exhausting from
muffler.
De-icing control is open. Close de-icing control with knob or
flat blade screwdriver.
Damaged air valve carriage, plate,
or seal.
Replace the carriage (108), plate
(105), or seal (104). See page 18.
Air motor “bounces” at top of stroke. Damaged bottom poppet. Replace bottom poppet (12). See
page 22.
Air motor “bounces” at bottom of
stroke.
Damaged top poppet. Replace top poppet (12). See page
22.
Slow motor reversal. Plugged poppet muffler. Remove muffler (58) and clean.
Icing on muffler. Air motor operating at high pressure
or high cycle rate.
Reduce pressure, cycle rate, or duty
cycle of motor, or open de-icing con-
trol with knob or flat blade screw-
driver.
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