Quantcast Units of the Brakc Systcms.

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foot pressure applied to the brake pedal of the towing
vehicle.
j. Units of the Brakc Systcms.
Semitrailer
M270A1.
The brake system consists of
(1)
the
whecl
brake
mechanisms,
brake
hydraulic
master
cylinders, air chambers, emergency relay valve, emer-
gency air line, service air line, hydraulic tubes, air
filters,
air
reservoir,
and
connections.
(2)
Semitrailers
M270
and
M269. The brakc system con-
sists of the wheel brake mechanisms, slack adjusters,
brake air chambers, emergency relay valve, air reser-
voir, emergency air line, service air line, air filters, and
connections.
k. Wheel Brake Mechanisms.
(1) Semitrailer
M27OA1
(a) T h e w h e e l b r a k e m e c h a n i s m s , l o c a t e d w i t h i n t h e b r a k e
drums, are of the self-centering type. This type brake
assembly has two identical brake shoes and two iden-
tical  wheel  cylinder  assemblies.
are
arranged
with
the
toes
diametrically
opposite
TACO 1321B
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