Figure 3-113. Automatic slack adjuster, removal and installation.

3-53. Automatic Slack Adjuster

performing maintenance function may

a. General. The brake system is supplied with oil

result in damage to equipment and

serious injury to personnel.

(OE10) from the main hydraulic reservoir. Brake

a d j u s t m e n t is accomplished automatically by slack

b. Removal. Refer to figure 3-113 and remove

the automatic slack adjuster.

a d j u s t e r s located in the hydraulic lines between the

brake valve and the wheel brake assemblies. No

NOTE

provision is made for manual adjustment. The

Cap all lines when disconnected.

automatic slack adjuster maintains

required

c. Disassembly. Refer to figure 3-114 and

clearance between linings and drum.

disassemble the automatic slack adjuster.

WARNING

d. Inspection.

Bleed the brake system pressure by

(1) Inspect the automatic slack adjuster

repeated application of the brakes with

housing (3) for cracks and breaks.

the engine stopped, until the low

(2) Inspect the diaphragm (8) for damage.

pressure warning buzzer sounds.

(3) Inspect hardware for damage.

Continue to apply brakes several times

e. Reassembly. Refer to figure 3-114 and

to further reduce accumulator pressure.

reassemble the automatic slack adjuster.

Carefully open bleed valves at each

f . Installation. Refer to figure 3-113 a n d i n s t a l l

automatic slack adjuster to bleed off

the automatic slack adjuster.

pressure. F a i l u r e t o b l e e d p r e s s u r e

from brake system before servicing or

Figure 3-113. Automatic slack adjuster, removal and installation.