TM-9-2320-285-24-1
TRUCK TRACTOR, YARD TYPE, 43,500 LB GVW, DED, 4X2, ARMY MODEL M878A1
TECHNICAL MANUAL; ORGANIZATIONAL, DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL
OCTOBER 1985
TM-9-2320-285-24-1 - Page 624 of 987
TM 9-2320-285-24-1
2-51.
AIR BRAKE SYSTEM MAINTENANCE (CONT)
d.
Brake Air Chambers.
(2) Rear Axle Brakes Air Chambers.
STEP
LOCATION
ITEM
ACTION
REMARKS
REASSEMBLY (cont)
5
c.
Pressure plate
Position
In soft-faced vise.
Wear
(cont)
(31),
compres-
safety glasses; tighten
sion spring
vise to contact pressure
(32),
and
plate (31) and spring
spring chamber
chamber assembly (12)
assembly (12)
d.
Soft-faced vise
Tighten
e.
Release stud (4)
Insert
Cross pin end through cover
of spring chamber assembly
(12); then turn release
stud clockwise 1/4 turn to
secure cross pin in pres-
sure plate (31)
f.
Washer (3) and
Install
On release stud (4).
Tighten
nut (2)
nut (2) with wrench to
completely cage
compression
spring (32)
g.
Spring (30)
Install
On push rod (29)
h.
Push rod (29)
Install
Through housing assembly (18)
i.
Nut (28) and
Install
On push rod (29)
clevis (27)
j.
New O-ring (23)
Install
In adapter (13)
k.
Push rod
Install
In adapter (13)
adapter (22)
l.
Plate (21) and
Install
screw (20)
m. Spring (26),
Install
plate (25),
and screw (24)
n.
New diaphragm
Position
On housing assembly (18)
(19)
o.
Adapter (13)
Align
On diaphragm (19)
p.
Housing assem-
Mate
bly (18) and
adapter (13)
q.
Two clamp as-
Install
semblies (17)
r.
Two carriage
Install
Tighten nuts to 20-30 pounds
bolts (16)foot torque
and nuts (15)
s.
New diaphragm
Position
On adapter (13)
(14)
2-601
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