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TROUBLESHOOTING GUIDE (Cont'd.)
PROBLEM
Motor will not run.
Restricted air intake.
Compressor is not supply-
ing enough air to operate
accessories.
Excessive belt wear.
Squealing sound.
CAUSE
Motor overload protection switch has tripped.
Tank pressure exceeds pressure switch "cut-
in" pressure.
Check valve stuck - fails to relieve head pres-
sure; motor cannot start.
Loose electrical connections.
Posstble defective capacitor.
Possible defective motdr.
Fuse blown, circuit breaker tdpped.
Pressure release valve on pressure switch
has not unloaded head pressure.
Dirty air filter.
Prolonged excessive use of air.
Compressor is not large enough for air re-
quirement.
Restricted air intake filter.
Loose belt•
Hole in hose.
Check valve restricted.
Air leaks•
Loose belt.
Tight belt.
Loose pulley.
Loose belt.
There is no oil in the compressor.
, CORRECTION
Let the motor cool off and reset switch by pressing
the red button located on the end of the motor.
Motor will start automatically when tank pressure
drops below "cut-in" pressure of pressure switch.
Remove and clean or replace. (Do not overtighten.)
Check wiring connection inside pressure switch and
terminal box area.
Returnto Sears Service Center for inspection or
replacement ifnecessary.
Have checked at a local Sears Service Center.
1. Check fuse box for blown fuse and replace if
necessary. Re-set circuit breaker• Do not use a
fuse or circuit breaker with higher rating than
that specified for your particular branch circuit.
2. Check for proper fuse; only "Fusetron" Type T
fuses are acceptable•
3. Check for low voltage conditions.
4. Remove check valve and clean or replace if it is
stuck open or closed.
5. Disconnect the other electricalappliances from
circuit or operate the compressor on its own
branch circuit.
Bleed the line by pushing the lever on the pressure
switch to the "OFF" position, opening the pressure
releasevalve. Ifthe valve stilldoesn't open, itmust be
replaced.
Replace with new.
Decrease amount of air usage.
Check the accessory air requirement. If it is higher
than the pressure supplied by your air compressor,
rou need alarger compressor.
Replace air intake filter.
Adjust belt tension.
Check and replace if required.
Remove and clean or replace.
Tighten fittings. (See Air Leaks Section ofTrouble-
shooting Guide.)
Adjust tension.
Adjust tension.
Check for worn keyway orpulleybore. Alsocheck for
bent motor shaft. Replace parts ifnecessary.
Adjust belt tension.
Add oil.
11 -- Eng