TM 5-4310-358-14
Table 5-1. Troubleshooting (Con't)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
NOTE
When installing new belts, never pry the belts over the pulley grooves.
e. To adjust the belts, move the motor
away from the compressor until there is
tension on the V-belts. Depress one of the
V-belts midway between the pulley and
flywheel; when the top lines up with the
bottom of the belt next to it under
normal thumb pressure the tension is correct.
CAUTION
Do not adjust the V-belts too tightly as this will overload motor and compressor
bearings. Also check and be sure pulley alignment is maintained.
f. Tighten motor mounting bolts securely.
Step 3. Check electric motor,
Remove any dirt, trash or other foreign
compressor cooling fins and belt
matter away from the compressor with an
guard for poor ventilation.
air hose.
4.
Electric Motor Noisy
Step 1. Check to see if electric
Tighten mounting bolts and check the
motor mounting bolts are loose.
belt tension.
Step 2. Electric motor bearings may
a. Disconnect main power source.
be worn. If the noise is coming from
inside the motor, disassemble the
b. Remove attaching hardware and remove
motor and determine if bearings are
V-belt guard.
worn.
c. Loosen motor mounting bolts, slide
motor forward towards compressor and
remove V-belts
d. Tag and disconnect electric leads.
e. Remove mounting bolts and remove the
electric motor and disassemble using
figure 5-3 as a guide.
(1) Remove setscrew (1), pulley (2), and
key (3).
(2) Remove four thru bolts (4), fan guard
(8), lockring (9), fan (10), spacer (11),
rear end shield assembly (12), bearing (13),
front end shield (5), bearing (6),
spring (7), rotor and shaft (15),
capacitor case (16), capacitors (17 and
18), from stator frame and base (23).
5-9
