Table of Contents
Advertisement
•
BRAKES
5 - 1
BRAKES
C O N T E N T S
Page
11- INCH DRUM BRAKE . . . . . . ,
42
12- INCH DRUM BRAKE
. 4 6
BENDIX DISC BRAKE
32
CHRYSLER DISC BRAKE
22
COMPONENT SERVICE
59
GENERAL INFORMATION
1
MASTER CYLINDER-COMBINATION
VALVE-BRAKE LINES
10
Page
Antilock Rear Wheel Brake System (RWAL)
1
Brake Components
1
BRAKE COMPONENTS
A l l A D models are equipped w i t h front disc a n d
rear d r u m brakes. Power assist brakes a n d rear
wheel antilock brakes are also standard o n a l l mod-
els. A d u a l reservoir master cylinder and single or
d u a l
diaphragm, v a c u u m
operated
power
brake
booster is used for a l l applications.
The f r o n t disc brake u n i t s consist o f single piston,
sliding-type calipers w i t h semi metallic brakeshoe
l i n i n g . Vented disc b r a k e rotors are used on a l l mod-
els. Bendix calipers are used on four wheel drive
W250/W350 models. Chrysler disc brake calipers are
used for a l l other applications.
The rear d r u m brakes are d u a l shoe u n i t s w i t h a n
automatic
adjustment
mechanism.
Bendix a n d
Chrysler d r u m brake assemblies are used.
A combination valve is used on a l l models. The
valve consists o f a f r o n t brake m e t e r i n g (hold-off)
valve and a front/rear pressure differential switch.
A red, brake indicator and w a r n i n g l i g h t is used t o
alert t h e driver i f a pressure differential exists be-
tween t h e f r o n t a n d rear h y d r a u l i c systems. The
l i g h t also alerts the d r i v e r w h e n the p a r k i n g brakes
are applied. The l i g h t is located a t the left side of the
i n s t r u m e n t cluster.
A n a d d i t i o n a l indicator l i g h t is used for the a n t i -
lock system. This l i g h t is amber and is located i n the
same side o f the i n s t r u m e n t cluster as t h e r e d i n d i -
cator l i g h t . The anti-lock l i g h t alerts the d r i v e r i f a n
anti-lock system f a u l t occurs.
Page
PARKING BRAKES
. . . . 5 2
POWER BRAKE BOOSTER-BRAKE PEDAL . . . 20
REAR WHEEL ANTI-LOCK BRAKES (RWAL) . . 53
RWAL SERVICE DIAGNOSIS
57
SERVICE ADJUSTMENTS . . .
6
SERVICE DIAGNOSIS
2
Page
Brake Fluid/Lubricants/Cleaning Solvents
. . . . . . . .
1
Brake Safety Precautions
.
2
ANTILOCK REAR WHEEL BRAKE SYSTEM (RWAL)
A l l t r u c k models are equipped w i t h antilock rear
brakes. The R W A L system i s designed to r e t a r d
wheel lockup d u r i n g periods o f h i g h wheel slip w h e n
b r a k i n g . Retarding wheel lockup is accomplished b y
m o d u l a t i n g f l u i d pressure t o t h e wheel brake u n i t s .
Refer t o the Rear Wheel A n t i L o c k B r a k e section for
operation and service i n f o r m a t i o n .
BRAKE FLUID/LUBRICANTS/CLEANING SOLVENTS
Recommended fluid for a l l A D models is Mopar
brake fluid or equivalent m e e t i n g S A E J1703 a n d
D O T 3 standards.
W h e n servicing rear brakes, use Mopar m u l t i pur-
pose grease to lubricate caliper slide surfaces, d r u m
brake pivot pins and shoe contact points on the back-
i n g plates. Use GE 661 or Dow 111 silicone grease on
caliper bushings and slide pins.
Use fresh brake fluid or M o p a r brake cleaner to
clean or flush brake system components. These are
the only cleaning materials recommended.
CAUTION: Never use gasoline, kerosene, alcohol,
motor oil, transmission fluid, or any fluid containing
mineral oil to clean the system components. These
fluids damage rubber cups and seals. If system
contamination is suspected, check the fluid for dirt,
discoloration, or separation into distinct layers.
Drain and flush the system with new brake fluid if
contamination is suspected.
G E N E R A L INFORMATION
INDEX
Advertisement
Table of Contents
