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 b.
Removal.
(1) Disconnect slack adjuster from brake air chamber push
rod by removing cotter pin and clevis pin.
(2)
Remove
snap
ring
from
splined
end
of
brake
cam-
shaft
extending
through
slack
adjuster.
Remove
washer
and slide off slack adjuster.
c. Installation.
(1)
Coat
splined
end
of
brake
camshaft
with
light
film
A slight
of oil and slide slack adjuster into position.
rotary motion of slack adjuster as it reaches cam-
shaft splines will allow splines in adjuster to mesh
Install washer and snap
with splines on camshaft.
ring on camshaft.
adjuster to yoke of brake air chamber
(2)
Connect
slack
with 1/2 x 1 13/64 clevis pin and 1/8 x 7/8 cotter
pin.
(3) Adjust brakes (par. 56c).
(4) Test air brake system (a above).
65. Air and Hydraulic Hose, Tubing, and Fittings, Test and
Check
a. With
air
hose
10)
connected
to
towing
vehicle or other air supply, and brakes applied, coat air lines,
No leak is permis-
couplings, and connections with soapsuds.
sible.
b. L e a k a g e a t c o u p l i n g s i s u s u a l l y c a u s e d b y w o r n , d a m a g e d ,
Install new gaskets to stop
or improperly installed gaskets.
leaks.
c. T i g h t e n a i r l i n e c o n n e c t o r s t o s t o p l e a k a g e .
d. T i g h t e n f i t t i n g s o n a i r l i n e s a n d a i r a n d h y d r a u l i c h o s e . I n -
s p e c t lines for partial restrictions caused by dents or kinks. Inspect
Replace with new piece of tub-
hose for wear, cuts, or breaks.
ing or hose or new fitting if damaged or if leak cannot be
stopped.
66.
Air-Over-Hydraulic Brake System (Semitrailer M270A1)
Hydraulic fluid should be checked when brakes
a. General.
are adjusted or when new brake shoe linings are installed. If
the fluid is materially darker in color, as compared to new
fluid, watery in consistency, comparatively odorless, or lacks
a thin lubricating film when rubbed between the fingers, the
hydraulic brake system (fig. 10) should be drained, flushed, and
refilled with new fluid.
b. Manual Bleeding of Hydraulic Brake System.
(1)
The
semitrailer
brake
system
must
be
connected
to
TAGO 1321B
102
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