Caliper Installation; Rotor Removal; Rotor Inspection And Service; Installing Caliper Piston - Dodge D150 1990 Service Manual

Rear wheel drive ram truck
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BRAKES
5 - 29
(3) I n s t a l l n e w dust boot on caliper piston.
(4) S t a r t caliper piston i n bore w i t h a r o t a t i n g mo-
t i o n . W h e n piston is started i n seal, push piston only
p a r t way i n t o bore (Fig. 17). M a i n t a i n u n i f o r m pres-
sure o n piston to avoid cocking i t i n bore.
(5) Press caliper piston t o b o t t o m o f bore a n d seat
piston dust boot w i t h i n s t a l l e r tool C-4690 a n d tool
handle C-4171 ( F i g . 18).
BOOT
STALLING
TOOL
RB217
Fig. 18 Seating Piston Dust Boot
(6) I n s t a l l caliper bleed screw i f removed.
CALIPER INSTALLATION
(1) Clean slide surfaces of caliper m o u n t i n g adapter
w i t h w i r e brush. Then lubricate adapter slide sur-
faces w i t h Mopar h i g h temperature wheel b e a r i n g
grease.
(2) I n s t a l l inboard brakeshoe i n adapter.
(3) I n s t a l l outboard brakeshoe i n caliper. Be sure
shoe is l i g h t press f i t i n caliper. Refer to i n s t a l l a t i o n
procedure i n Brakeshoe
Replacement.
(4) Lubricate machined ways o f caliper w i t h Mopar
h i g h temperature grease.
(5) I n s t a l l O-ring i n adapter, i f removed.
(6) I n s t a l l caliper over rotor and into adapter.
(7) A l i g n caliper i n adapter a n d i n s t a l l caliper r e -
t a i n e r clips a n d a n t i - r a t t l e springs. T i g h t e n r e t a i n e r
clip screws to 20 N»m (180 in-lbs) torque.
(8) Connect brake hose to caliper. T i g h t e n f i t t i n g
bolt to 47 N»m (35 ft-lbs) torque. B e s u r e hose i s
c l e a r of c h a s s i s a n d s u s p e n s i o n components a n d
u s e n e w s e a l w a s h e r s to s e c u r e hose fitting to
c a l i p e r . D o n o t r e u s e o l d w a s h e r s *
(9) F i l l master cylinder w i t h Mopar brake f l u i d or
equivalent meeting S A E a n d D O T standards J1703
and D O T 3.
(10) Bleed brakes. Refer to procedure i n Service
A n d Adjustments section.
(11) I n s t a l l wheels and lower vehicle.
(12) A p p l y brakes several times to seat caliper pis-
tons a n d brakeshoes. Be sure firm pedal is obtained
before m o v i n g vehicle.
ROTOR REMOVAL
(1) Raise and support vehicle.
(2) Remove wheel and t i r e assembly.
(3) Remove caliper assembly b u t do n o t disconnect
brake hose. Do not allow brake hose to support c a l i -
per. Support caliper on stool, or suspend caliper w i t h
w i r e attached to nearby body or suspension compo-
nent.
(4) Remove grease cap, cotter p i n , n u t lock, n u t ,
t h r u s t washer and outer wheel bearing.
(5) Remove rotor from spindle.
(6) Remove rotor shield and seal i f either is t o be
serviced.
ROTOR INSPECTION AND SERVICE
ROTOR
CONDITION
The rotor b r a k i n g surfaces should not be refinished
unless actually necessary.
L i g h t surface r u s t a n d
scale can be removed i n a lathe equipped w i t h d u a l
sanding discs. The rotor surfaces can be restored by
m a c h i n i n g i n a disc brake lathe i f surface scoring
and wear are l i g h t . The rotor should be replaced i f
severely scored, tapered, has h a r d spots, is cracked,

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