(21). Remove the compressor as-
68. Compressor Assembly (Model
sembly.
LP-512-ENG).
b. Installation.
a. Removal.
(1) Position the compressor assembly on
Remove the V-belt guard (par. 82).
(1)
the truck assembly (21 ) and secure
(2)
Remove the V-belts (par. 83).
the compressor in place with the four
Loosen one compression nut (9, fig.
(3)
m o u n t i n g capscrews (22), lock-
washers, flat washers, and nuts.
cooler (2) from the air receiver tank.
(2) Position one end of the aftercooler
(2, fig. 18) in the air receiver tank and
(4)
Remove the four nuts, lockwashers,
tighten the compression nut (9).
flat washers, and capscrews (22), fig.
(3) Install and adjust the V-belts (par.
truck assembly (21 ). Remove the
(4) Install the V-belt guard (par. 82).
compressor to the truck assembly
Section V. ELECTRIC MOTOR ACCESSORIES USED ON MODEL OEH-34-60-ENG-1
mounting plate (2) to the starter box
69. General
(6) and remove the starter assembly.
The electric motor accessories consist of the
(5) Remove the stationary contacts (8).
magnetic starter with pressure switch, and the
(6) To remove the movable contacts (9),
drive pulley. The pressure switch is actuated
lift the contact upward and pull the
by air pressure exerted against the diaphragm
contact free of the block.
from the air receiver tank. It energizes the
(7) To remove the coil retainer spring
starter switch, causing the contacts to close.
(11 ), lift upward and pull it free.
The drive pulley is mounted on the shaft of the
c. Cleaning and Inspection.
electric motor.
(1) Clean the magnetic starter and pres-
sure switch by blowing all dust and
70. Magnetic Starter With Pressure Switch
dirt from the starter and switch with
and Cover
compressed air.
a. Removal.
(2) Clean the wires by wiping with a dry
(1) Turn off the outside power source.
cloth.
(2) Release all air from the compressor
(3) Clean all other parts with an approved
by opening the draincocks.
cleaning solvent and dry thoroughly.
(3) Remove the magnetic starter cover
(4) Replace a defective magnetic starter
and pressure switch.
(4) Remove the pressure switch tube (par.
d. Reassembly.
(1) Insert the coil retainer spring (11)
(5) Loosen the tedminal screws and re-
in position below the coil and depress
move outside power wires from the
until it locks in place.
magnetic starter box.
(2) Insert the movable contacts (9) into
(6) Remove the two machine screws, lock-
the contactor block and depress until
washers, flat washers, and nuts that
they lock in place.
secure the magnetic starter box to the
(3) Secure the stationary contacts (8) to
electric motor. Remove the magnetic
the contactor block.
starter and pressure switch.
(4) Position the magnetic starter assem-
b. Disassembly.
bly in the magnetic starter box (6)
(1) Remove the leads from T1 terminal
and secure it to the mounting plate (2)
in the box.
(5) Install the overload relay (14).
and T3 terminal (7, fig. 9).
(6) Install the heaters (10 and 16).
(2) Remove the heaters (10 and 16, fig. 9).
(7) Connect the leads to terminals Tl, T2,
(3) Remove the overload relay (14).
and T3.
(4) Remove the screws that secure the
