PROBABLE TROUBLE CAUSES
CHECK POINT NOS.
1 . . . . . . . . . . . . . . . . Clogged air inlet filter silencer.
2 . . . . . . . . . . . . . . . . Loose belt wheel or motor pulley or motor with excessive end play
in shaft.
3 . . . . . . . . . . . . . . . . Receiver needs draining.
4 . . . . . . . . . . . . . . . . Air to fan-type flywheel blocked off.
5 . . . . . . . . . . . . . . . . Air leaks in piping (on machine or in outside system).
6 . . . . . . . . . . . . . . . . High pressure discharge valve leaking.
7 . . . . . . . . . . . . . . . . Oil viscosity too low.
8 . . . . . . . . . . . . . . . . Oil viscosity too high.
9 . . . . . . . . . . . . . . . . Oil level too low.
10 . . . . . . . . . . . . . . . Detergent type oil being used.
11 . . . . . . . . . . . . . . . Extremely light duty or located in a damp humid spot.
12 . . . . . . . . . . . . . . . Low line voltage, poor motor terminal contact, loose connections,
i m p r o p e r starter heaters.
13 . . . . . . . . . . . . . . . Poor power regulation (unbalanced line).
14 . . . . . . . . . . . . . . . V-Belts pulled excessively tight.
15 . . . . . . . . . . . . . . . Leaking or maladjusted centrifugal pilot valve, or defective O-Ring
on pilot valve.
16 . . . . . . . . . . . . . . . Carbon on top of piston.
17 . . . . . . . . . . . . . . . Leaking, broken, carbonized or loose valves.
18 . . . . . . . . . . . . . . . Worn or scored connecting rod, piston pin or crank pin bearings.
19 . . . . . . . . . . . . . . . Defective ball bearing on crankshaft or on motor shaft.
20 . . . . . . . . . . . . . . . Piston rings broken or not seated in, end gape not staggered, stuck
in grooves, rough, scratched or excessive end gap (over . 020"), or
excessive side clearance (over .006").
21 . . . . . . . . . . . . . . . Cylinders or pistons scratched, worn or scored.
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