TM 5-3820-233-12/2
(2) Disconnect air line from brake chamber.
4-73. Secondary Screening Unit Air Brake System
(3) Remove the brake chamber (27, fig. 4-72) from
The secondary crushing and screening unit air brake
axle.
system consists of the brake chamber, brake shoes, slack
b. Inspection. Inspect the brake chamber for proper
adjuster, emergency valve, reservoir, connecting hoses,
operation and damage.
Replace a defective brake
tubes and fittings. The purpose of the air brake system is
chamber.
to provide a means of operating the brakes, through the
c. Installation. Refer to figure 4-72 and install
medium of compressed air, in conjunction with the air
the brake chamber in reverse order of removal.
brake system on the prime mover.
4-76.Air Brake System Relay Emergency Valve
4-74. Slack Adjuster
a. Removal.
a. Removal.
(1) Drain air from air brake system (para 4-78).
(1) Remove the slack adjuster cover.
(2) Disconnect tubing (20 and 22, fig. 4-73) and
(2) Loosen slack adjuster worm shaft.
fitting (8, 9 and 21) from valve (33).
(3) Remove slack adjuster from brake assembly
(3) Remove screw (32) and remove valve (33) from
cam shaft (fig. 4-72).
the frame.
b. Inspection. Inspect for worn worm gear or worm.
b. Inspection.
Replace a defective slack adjuster.
(1) Inspect the tubing and fittings for damage.
c. Installation. Refer to figure 4-72 and install the
(2) Inspect the valve (33, fig. 4-73) for damage or
slack adjuster on brake assembly cam shaft.
missing hardware. Replace a defective valve.
d. Adjustment. Refer to paragraph 4-72e and adjust
c. Installation. Refer to figure 4-73 and install the air
the slack adjuster.
brake system relay emergency valve (33) in the reverse
4-75. Brake Chamber
procedure of removal.
a. Removal.
(1) Bleed air from system (para 4-78).
Figure 4-73. Air brake system components, removal and installation.
(1) Bleed air from air system (para 4-78).
4-77. Air Brake System Filters
(2) Disconnect hoses from filters.
a. Removal. Refer to figure 4-73 and remove the air
(3) Remove nuts and U-bolts and remove air filter.
brake system filters as follows:
4-58
