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 (4)
Refill
hydraulic
system
(5)
Position
vent
tube
assembly
over
filler
cap
of
hy-
draulic master cylinder and tighten connecting nut.
(6)
Install
air
line
to
elbow
in
cover
of
brake
air
cham-
ber and tighten connector.
(7)
Perform
leakage
tests
(a
above).
(8) Bleed hydraulic brake system (par. 66b).
63. Brake Air Chamber (Semitrailers M270 and M269)
a. Leakage Tests. Refer
to
b. Operating Tests.
(1)
Apply
brakes,
and
note
whether
brake
air
chamber
push
rods
move
promptly
and
without
binding.
(2)
Release
brakes,
and
note
whether
brake
air
chamber
push
rods
return
to
released
position
promptly
and
without
binding.
c.
Removal.
line
assembly
at
brake
air
(1)
Disconnect
flexible
air
chamber.
(2)
Disconnect push rod yoke at slack
adjuster
by
re-
moving cotter pin and clevis pin.
(3)
Remove
two
hex
nuts
and
from
mount-
ing
bolts
beneath
brake
air
chamber
and
lift
cham-
ber off mounting bracket.
d.
Installation.
(1) Position brake air chamber on mounting bracket and
install two 5/8-inch lockwashers and 5/8-inch hex nuts
on mounting bolts beneath chamber.
(2)
Connect yoke of push rod to slack adjuster with
1/2
x 1 13/64 clevis pin and 1/8 x 7/8 cotter pin.
(3) Connect flexible hose assembly to brake air chamber.
(4) Adjust brakes (par. 56c).
(5)
Perform
leakage
tests
62a).
64.
Slack
Adjusters
(Semitrailers
M270
and
M269)
a.
Operating
Tests. Adjust brakes (par. 56c). Apply brakes
several times and note movement of brake air chamber push
rod and slack adjuster (fig. 18). Push rod should move
inch but not over 2 inches, for full application of brakes.
Should
slack
adjuster
move
without
turning
brake
camshaft,
replace
slack
adjuster.
TAGO 1321B
101
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