Dodge D150 1990 Service Manual page 260

Rear wheel drive ram truck
Table of Contents

Advertisement

BRAKES
5 - i t
WHEEL CYLINDER REMOVAL
(1) Raise a n d support the vehicle.
(2) Remove t h e brake d r u m and brakeshoes as de-
scribed i n t h i s section.
(3) Remove t h e anchor bolt and n u t and remove the
washer, s p r i n g , p a r k i n g brake lever, adjuster cable,
cam plate a n d anchor p i n bushing.
(4) loosen t h e b r a k e l i n e a t the wheel cylinder.
(5) Remove t h e wheel cylinder bolts:
(6) Disconnect the b r a k e l i n e and remove the wheel
cylinder.
WHEEL CYLINDER OVERHAUL
WHEEL CYLINDER
DISASSEMBLY
(1) Remove t h e push rods and boots (Fig. 10).
(2) Press t h e pistons, cups and spring and expander
out o f the cylinder bore.
(3) Remove t h e bleed screw.
Fig. 10 Wheel Cylinder Components
CLEANING
AND
INSPECTION
Clean t h e cylinder a n d pistons w i t h clean brake
f l u i d or b r a k e cleaner only. Do n o t use any other
cleaning agents. D r y t h e cylinder and pistons w i t h
compressed a i r . Do not use rags or shop towels to dry
the cylinder components. L i n t from such materials
can adhere t o t h e cylinder bores and pistons.
Inspect t h e cylinder bore. L i g h t discoloration a n d
dark stains i n t h e bore are n o r m a l and w i l l not i m -
pair cylinder operation. I f desired, t h e bore can be
l i g h t l y polished b u t only w i t h crocus cloth. Replace
the cylinder i f the bore is scored, p i t t e d or heavily
corroded. H o n i n g t h e bore to restore t h e surface is
not recommended.
Inspect t h e cylinder pistons. The piston sin-faces
should be smooth and free of scratches, scoring and
corrosion. Replace the pistons i f w o r n , scored, or cor-
roded. Do a t t e m p t t o restore t h e surface b y sanding
or polishing.
Discard t h e old piston cups and the spring a n d ex-
pander. These parts are n o t reusable. T h e o r i g i n a l
dust boots may be reused b u t only i f they are i n good
condition.
ASSEMBLING
WHEEL
CYLINDER
(1) L u b r i c a t e wheel cylinder bore, pistons, p i s t o n
cups a n d s p r i n g and expander w i t h clean b r a k e f l u i d :
(2) I n s t a l l first piston i n cylinder bore. T h e n i n s t a l l
cup i n bore and against piston. B e sure l i p o f p i s r -
ton c u p i s facing i n w a r d ( t o w a r d s p r i n g a n d e x -
p a n d e r ) a n d flat s i d e i s a g a i n s t p i s t o n .
(3) I n s t a l l s p r i n g a n d expanders followed b y r e -
m a i n i n g piston cup a n d piston.
(4) I n s t a l l boots on each end of cylinder a n d i n s e r t
push rods i n boots.
(5) I n s t a l l cylinder bleed screw.
WHEEL CYLINDER INSTALLATION
(1) S t a r t the brakeline i n t h e cylinder.
(2) Position t h e cylinder o n t h e support plate a n d
i n s t a l l t h e cylinder a t t a c h i n g bolts.
(3) T i g h t e n t h e b r a k e l i n e f i t t i n g and t h e cylinder
a t t a c h i n g bolts.
(4) I n s t a l l t h e anchor p i n bushing, cam plate, ad-
j u s t e r cable, p a r k i n g b r a k e lever, spring washer a n d
the anchor bolt and n u t .
(5) I n s t a l l t h e brakeshoes and brake d r u m as de-
scribed i n t h i s section.
(6) I n s t a l l axle shaft.
(7) I n s t a l l the wheel and t i r e .
(8) Remove the supports and lower the vehicle.
SUPPORT PLATE REMOVAL
(1) Raise and support the vehicle.
(2) Remove the wheel a n d t i r e .
(3) Remove axle shaft.
(4) Remove the brake d r u m , brake shoes and wheel
cylinder as described i n t h i s section.
(5) Remove t h e bolts/nuts attaching t h e support
plate t o t h e axle and remove the support plate.
SUPPORT PLATE INSTALLATION
(1) Transfer the wheel cylinder and p a r k i n g brake
lever components to t h e replacement support plate.
(2) Position t h e support plate on t h e axle and i n -
s t a l l t h e a t t a c h i n g bolts/nuts.
(3) I n s t a l l t h e brakeshoes. Adjust t h e shoes t o t h e
d r u m w i t h a brake gauge.
(4) I n s t a l l the brake d r u m .
(5) I n s t a l l the axle shaft.
(6) I n s t a l l t h e wheel and t i r e .
(7) Remove the supports and lower the vehicle.

Advertisement

Table of Contents
loading

Table of Contents