Dodge D150 1990 Service Manual page 251

5 - 42 BRAKES
•
11-INCH DRUM B R A K E
INDEX
Page
Brake Drum Inspection And Refinishing 44
Brake Drum Installation .
45
Brake Drum Removal 42
Brake Shoe Installation . . . 44
Brake Shoe Removal 43
Brake Support Plate Installation 45
Brake Support Plate Removal 45
Page
Cleaning And Inspection 43
General Information . . 42
Safety Precautions . 42
Wheel Cylinder Installation . . . . . . . . . . . . . . . . . . 46
Wheel Cylinder Overhaul . 46
Wheel Cylinder Removal . . . . . . . . . . . . . . . . . . . . 45
GENERAL INFORMATION
Chrysler 11-inch r e a r d r u m brakes are used on D
and W 100/150 models (Fig. 1). A l l applications are
two-shoe, i n t e r n a l expanding u n i t s w i t h a self ad-
j u s t e r mechanism. A single wheel cylinder is used to
expand t h e dual brakeshoes. T h e lower ends o f t h e
brake shoes are connected by a star wheel adjusting
screw w h i c h is part o f the self adjusting mechanism.
SAFETY PRECAUTIONS
SUPPORT
PLATE
PARKING
BRAKE
STRUT AND
SPRING
RETURN
SPRING
ANCHOR
PLATE
RETURN CABLE
SPRING GUIDE
PRIMARY
SHOE AND
LINING
SHOE SPRING
ADJUSTER SCREW
ASSEMBLY
ADJUSTER
LEVER
LEVER
SPRING
PARKING
BRAKE
LEVER
ADJUSTER
CABLE
AND
SPRING
SHOE
RETAINER,
SPRING
AND PIN
SECONDARY
SHOE AND
LINING
J9005-62
Fig. 1 11-Inch Drum Brake Assembly
WARNING: DUST AND DIRT ON BRAKE PARTS
GENERATED DURING THE NORMAL USE A N D
WEAR OF MOTOR VEHICLE BRAKE SYSTEMS MAY
CONTAIN ASBESTOS FIBERS. BREATHING EXCES-
SIVE CONCENTRATIONS OF ASBESTOS FIBERS
CAN CAUSE SERIOUS BODILY HARM. EXTREME
CARE SHOULD BE EXERCISED WHILE SERVICING
BRAKE ASSEMBLIES OR COMPONENTS. DO N O T
CLEAN BRAKE ASSEMBLIES OR COMPONENTS
WITH COMPRESSED AIR OR BY DRY BRUSHING;
USE A VACUUM CLEANER SPECIFICALLY RECOM-
MENDED FOR USE WITH ASBESTOS FIBERS. IF A
SUITABLE VACUUM CLEANER IS NOT AVAILABLE,
CLEANING SHOULD BE DONE WET USING A WA-
TER DAMPENED CLOTH. DO NOT CREATE DUST
BY SANDING, GRINDING, AND/OR SHAVING
BRAKE LININGS OR PADS UNLESS SUCH OPERA-
TION IS DONE WHILE USING PROPERLY VENTI-
LATED EXHAUST EQUIPMENT. DISPOSE OF DUST
AND DIRT SUSPECTED OF CONTAINING ASBES-
TOS FIBERS IN SEALED BAGS OR CONTAINERS
TO MINIMIZE EXPOSURE TO YOURSELF AND OTH-
ERS. FOLLOW ALL RECOMMENDED PRACTICES
PRESCRIBED BY THE OCCUPATIONAL SAFETY
AND HEALTH ADMINISTRATION AND THE ENVI-
RONMENTAL PROTECTION AGENCY FOR THE
HANDLING, PROCESSING, AND DISPOSITION OF
DUST OR DIRT WHICH MAY CONTAIN ASBESTOS
FIBERS.
BRAKE DRUM REMOVAL
(1) Raise and support vehicle.
(2) Remove wheel and t i r e .
(3) Remove clip nuts securing brake d r u m to wheel
studs.
(4) I f d r u m i s difficult t o remove, retract brake-
shoes as follows:
(a) Remove rear p l u g f r o m access hole i n sup-
port plate.
(b) I n s e r t a t h i n screwdriver i n t o access hole
and push self adjusting adjusting lever away f r o m
adjuster screw star wheel.
(c) I n s e r t tool C-3784 i n t o brake adjusting hole
and rotate adjuster screw star wheel t o r e t r a c t
brakeshoes.
(5) Remove brake d r u m .
(6) Inspect b r a k e l i n i n g for wear, alignment, or ev-
idence of leakage from axle or wheel cylinder.