TM-9-2320-285-24-2
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-9-2320-285-24-2 - Page 205 of 698
TM 9-2320-285-24-2
3-24.
BRAKE CONTROLS MAINTENANCE (CONT)
g.
Relay Valve (cont).
STEP
LOCATION
ITEM
ACTION
REMARKS
REASSEMBLY (cont)
5
Relay
a
Bores of body
Lubricate
Use pneumatic grease
valve
(28), cover
(11), piston
(13), O-rings
(7, 12 and
22) and seal-
ing ring (15)
b
Spring (25)
Position
On valve (26)
c
Retainer (24)
Install
d
Washer (23)
Install
e
O-ring (22)
Install
f
Retaining ring
Install
Use retaining ring pliers
(21)
g
Valve (26) and
Position
In body (28)
retainer (27)
h
Cover (20)
Position
i
Four screws
Install and
(19)
tighten
j
Diaphragm (18)
Position
Between guide ribs in cover
(20)
k
Washer (17) and
Install and
screw (16)
tighten
l.
Sealing ring
Position
(15)
m
O-ring (12)
Install
On piston (13)
n
Seat (14) and
Install
piston (13)
o
Cover (11)
Position
On body (28), with match
marks aligned
p
Capscrews (9
Install
Tighten to 120-150 pounds
and 10)
inch
q
Diaphragm (8)
Position
In cover (11)
and O-ring
(7)
NOTE
Wrap Teflon tape around threads of adapter (6) before installation.
3-199
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