(2) Position the movable contacts in the
e. Installation.
contactor block and secure the con-
(1) Install the magnetic starter box on the
tact set cover to the contactor block.
electric motor and secure with two ma-
(3) Position the push rod in the rear of
chine screws, l o c k w a s h e r s, flat
the pressure switch. Place the spring
washers, and nuts.
(2) Install the outside power source wires
on the diaphragm cover with dia-
phragm over the spring. Secure the
in the magnetic starter box.
diaphragm, spring, and cover to the
(3) Install the pressure switch tube (par.
pressure switch housing.
(4) Install the magnetic starter cover
e. Installation.
(1) Install the pressure switch and con-
nect the leads.
(2) Install the bushing in the air receiver
a. Removal.
tank and the elbow in the housing.
(1) Remove the pressure switch tube (4,
(3) Install the pressure switch tube (4,
and remove the other end of the tube
and tighten the fitting. Install the
from the elbow on the air receiver
other end of the tube assembly on the
tank.
elbow on the air receiver tank and
(2) Remove the elbow from the bushing
tighten the nut.
and remove the bushing from the air
receiver tank.
(3) Tag and disconnect the leads from the
OEH-34-60-ENG-1)
pressure switch and remove the
a. Removal.
switch
(1) Remove the V-belt guard (par. 82).
b. Disassembly.
(2) Remove the V-belts (par. 83).
(1) Remove the screws that secure the
(3) Remove the setscrew that locks the
diaphragm cover to the pressure
drive pulley (9, fig. 16) to the motor
switch housing and remove the cover,
armature shaft (10). Use a suitable
diaphragm, spring, and push rod.
puller to remove the pulley and lift
(2) Remove the cover from the contact
out the machine key (11).
set and lift out the movable contacts.
b. Cleaning and Inspection.
(3) Remove the screws that secure the
fixed contacts to the contactor block
(1) Clean the pulley and key with an ap-
and remove the contacts.
proved solvent and dry thoroughly.
c. Cleaning and Inspection.
(2) Inspect the pulley for cracks and
(1) Wipe the pressure switch tube with a
breaks, the key for chips and burs,
cloth moistened with an approved
and the threaded surfaces for wear
cleaning solvent and dry thoroughly.
and damage. See that the key fits
Blow out the tube with compressed air.
snugly in the keyway.
(2) Inspect the tube assembly for cracks,
(3) Replace all defective parts.
bends, or damaged threads. Replace
c. Installation.
a defective tube assembly.
(1) Position the machine key (11) in the
(3) Inspect the contact set for burning
motor armature shaft (10).
and pitting.
(2) Fit the key slot in the drive pulley (9)
(4) Inspect all threaded parts for dam-
over the machine key, and press the
aged or defective threads.
pulley in position on the shaft. Lock
(5) Repair or replace a defective pressure
the pulley in position by tightening the
switch.
setscrew.
d. Reassembly.
(3) Install and adjust the V-belt (par. 83).
(1) Secure the fixed contacts to the con-
tactor block with the machine screws.
(4) Install the V-belt guard (par. 82).
