TM 5-4310-350-14
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
disassemble the magnetic starter assembly as follows:
(1) Remove connector (6) and (11) and o-ring and washer assembly (20) from the magnetic
switch box.
(2) Remove nut (1) lockwasher, (2) flatwasher (3) and capscrew (4) and remove the
controlbox.
(3) Remove contact cap (12), contact kit (13) contact carrier (14), operating coil (15),
coil heater (16) overload relay (17), and interlock assembly (18).
(4) Replace any defective part.
(5) Replace interlocking assembly (18) overload relay (17) coil heater (16) operating coil
(15 ) contact carrier (14) contact kit (13) and contact cap.
(6) Replace the magnetic control box with capscrew (4) flatwasher (3) lockwasher (2)
and nut (1).
Step 2. Check magnetic starter switch to see if it is defective. Use compressed air and remove all dust or
dirt from magnetic starter components, check continuity of heater coil, operating coil, relay overload,
contact carrier and interlock assembly. Check on-off switch continuity and stem action. If the mag-
netic starter switch and on-off switch checks out, proceed to Step 3. If not replace the magnetic
switch as follows:
a. Disconnect main power source.
b. Remove screw from bottom of magnetic starter box cover and remove the cover.
c. Tag and disconnect all wiring.
d. Use figure 5-2 as a guide.
(7) Replace connector (11) and (6) and o-ring and washer assembly (20) to the magnetic
control box.
e. Reconnect all wiring.
f. Replace magnetic starter box cover and install capscrew.
g. Connect main power source.
Step 3. Check for a defective motor. Connect leads from the motor direct to the power source. If motor fails
to run remove, repair or replace.
a. Disconnect main power source.
b. Remove attaching hardware and remove v-belt guard.
d. Tag and disconnect electric leads.
guide.
(1) Remove setscrew (5) pulley (6) and key (7).
(2) Remove four bolt, (10) shaft end, end shield (13) opposite shaft end, end shield (11)
shaft end bearing (14 ) opposite shaft end bearing (12) spacer bearing (15) fan (16) rotor (17)
stator with frame (18) and base (19).
WARNING
Dry cleaning solvent, P-D-680, used to clean parts is potentially dangerous to personnel and
property. Do not use near open flame or excessive heat. Flash point of solvent is 100 F.
-- 138 F.
(3) Clean all parts except rotor, bearings and stator in dry cleaning solvent P-D-680 and wipe
dry with a lint free cloth.
(4) Use compressed air to clean dust and dirt off rotor, hearings, and stator, then wipe with
a cloth dampened in dry cleaning solvent P-D-680.
(5) Inspect bearings and rotor shaft for excessive wear, and rough or scored surfaces. Use a
file or emery cloth to smooth rough or scored surfaces. Replace defective bearings or a defective
rotor shaft. If the motor is beyond repair, replace the motor.
(6) Replace stator with frame (18) on base (19) rotor (17) fan (16) spacer hearing (15)
opposite shaft end bearing (12) shaft end bearing (14) opposite shaft end, end shield (11) shaft
end, end shield (1) and four bolts (10).
(7) Replace key (7) in shaft, pulley (6) on shaft, and replace the setscrew (5).
f. Mount electric motor on compressor and replace mounting bolts.
g. Connect electrical leads.
Change 2
