Chrysler RAM TRUCK 2500 1994 Service Manual page 226

BLEED
SCREW
COMPRESSION
SPRING A N D
EXPANDERS J9405-6
Fig. 12 Wheel Cylinder Components (Mil)
(b) To install parts individually, install first pis*
ton cup i n bore. Be sure open end of cup faces bore
interior and flat side of cup faces piston. Install
first piston in bore and seat i t against piston cup.
Then insert expander spring and remaining, re­
maining piston cup and piston.
CUPS
PISTONS J9405-69
Fig. 13 Assembling Wheel Cylinder Pistons, Cups
And Expander
(4) Start piston dust boots i n each end of cylinder
bore by hand. Then seat boots i n cylinder with a
bench vise (Fig. 14). Press boots into place until flush
with ends of cylinder.
(5) Apply light coat of silicone grease, or dielectric
(anti-corrosion) grease to wheel cylinder links. Then
insert links into dust boots and seat them against
pistons.
WHEEL CYLINDER INSTALLATION (ALL)
(1) Clean support plate and lubricate shoe contact
pads with multi-mileage or silicone grease (Fig. 3).
Fig. 14 Seating Wheel Cylinder Dust Boots
(2) Apply thin coat of Mopar silicone sealer to
wheel cylinder mounting surface of support plate
(Fig. 15). Sealer prevents road splash from entering
brake drum past cylinder.
Fig. 15 Wheel Cylinder Mounting Surface (On
Support Plate)
(3) Start brakeline in cylinder inlet by hand. Do
not tighten fitting at this time.
(4) Mount wheel cylinder on support plate and in­
stall cylinder attaching screws. Tighten screws to 20
N-m (15 ft. lbs.) torque.
(5) Tighten brakeline fitting to 13 N-m (115 in.
lbs.) torque.
(6) Install brakeshoe components.
(7) Adjust brakeshoes to drum using brake gauge.
(8) Install brake drum.
(9) Fill and bleed brake system.
(10) Install wheel and tire assemblies and lower
vehicle.
DRUM BRAKE ADJUSTMENT
The rear drum brakes are equipped with a self-ad­
justing mechanism. Under normal circumstances, the
only time adjustment is required is when the shoes
are replaced, removed for access to other parts, or
when one or both drums are replaced.