Units of the Brakc Systcms.

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Types of Brakes.

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TM-9-8240 12-Ton 4-Wheel Wrecklerlow-Bed Semitrailers M9 M270 and M270A1 Manual

Wheel Brake Mechanisms.

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

(fig.

15).

(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-

The brake shoes

tical wheel cylinder assemblies.

are

arranged

with

the

toes

diametrically

opposite

TACO 1321B