wheel CHRYSLER CARAVAN 2002 Manual PDF

DESCRIPTION - DRUM BRAKES (REAR)
This vehicle's rear wheel drum brakes are a two-
shoe, internal-expanding type with an automatic
adjuster screw. The automatic adjuster screw is
located directly below the wheel cylinder that is
mounted near the top of the brake assembly (Fig.
18). These and two brake shoes (and attaching parts)
are mounted to a support plate at each rear wheel. A
brake drum covers each brake assembly.
OPERATION
OPERATION - DISC BRAKES (FRONT)
When the brakes are applied, fluid pressure is sent
to each brake caliper. The pressure at the caliper is
exerted equally against the caliper piston. The pres-
sure applied to the piston is transmitted directly to
the inboard brake shoe. This forces the shoe lining
against the inner surface of the brake rotor. At the
same time, fluid pressure within the caliper piston
bore forces the caliper to slide inward on its guide
pins. This action brings the outboard shoe lining into
contact with the outer surface of the brake rotor.
This pressure on both sides of the brake rotor causes
friction, bringing the vehicle to a stop.
When the brake pedal is released, so is the fluid
pressure. The piston seal inside the caliper is
designed to pull the piston back into the bore of the
caliper when the brake pedal is released (Fig. 19).
This action helps maintain the proper brake shoe-to-
rotor clearance.
As disc brake shoe linings wear, master cylinder
reservoir brake fluid level will drop. Adjust as neces-sary. Fluid level should always be checked after
replacing shoes.
OPERATION - DISC BRAKES (REAR)
The rear disc brakes operate similarly to front disc
brakes, however, there are some features that require
different service procedures.
DIAGNOSIS AND TESTING - DRUM BRAKE
AUTOMATIC ADJUSTER
The rear drum brakes on this vehicle automatically
adjust when required during the normal operation of
the vehicle every time the brakes are applied. Use
the following procedure to test the operation of the
automatic adjuster.
Place the vehicle on a hoist with a helper in the
driver's seat to apply the brakes. Remove the access
plug from the adjustment hole in each brake support
plate to provide visual access of the brake adjuster
star wheel.
To eliminate the condition where maximum adjust-
ment of the rear brake shoes does not allow the auto-
matic adjuster to operate when tested, back the star
wheel off approximately 30 notches. It will be neces-
sary to hold the adjuster lever away from the star
wheel to permit this adjustment.
Have the helper apply the brakes. Upon applica-
tion of the brake pedal, the adjuster lever should
move down, turning the adjuster star wheel. Thus, a
definite rotation of the adjuster star wheel can be
observed if the automatic adjuster is working prop-
erly. If one or more adjusters do not function prop-
erly, the respective drum must be removed for
adjuster servicing.
Fig. 18 Drum Brake Assembly (Right Shown)
1 - WHEEL CYLINDER
2 - BRAKE SHOE UPPER RETURN SPRING
3 - AUTOMATIC ADJUSTER LEVER
4 - TENSION CLIP
5 - AUTOMATIC ADJUSTER ASSEMBLY
Fig. 19 Caliper Piston Seal Function For Automatic
Adjustment
1 - PISTON
2 - CYLINDER BORE
3 - PISTON SEAL BRAKE PRESSURE OFF
4 - CALIPER HOUSING
5 - DUST BOOT
6 - PISTON SEAL BRAKE PRESSURE ON
5 - 16 BRAKES - BASERS
HYDRAULIC/MECHANICAL (Continued)
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BRAKE LINES
DESCRIPTION - BRAKE TUBES AND HOSES
The brake tubes are steel with a corrosion-resis-
tant nylon coating applied to the external surfaces.
The flex hoses are made of reinforced rubber with fit-
tings at each end.
The primary and secondary brake tubes leading
from the master cylinder to the ABS ICU Hydraulic
Control Unit (HCU) or the non-ABS junction block
have a special flexible section. This flexible section is
required due to cradle movement while the vehicle is
in motion (The ICU and non-ABS junction block are
mounted to the cradle).If replacement of these
lines is necessary, only the original factory
brake line containing the flexible section must
be used.
OPERATION - BRAKE TUBES AND HOSES
The purpose of the chassis brake tubes and flex
hoses is to transfer the pressurized brake fluid devel-
oped by the master cylinder to the wheel brakes of
the vehicle. The flex hoses are made of rubber to
allow for the movement of the vehicle's suspension.
INSPECTION - BRAKE TUBES AND HOSES
Flexible rubber hose is used at both front brakes
and at the rear axle. Inspection of brake hoses
should be performed whenever the brake system is
serviced and every 7,500 miles or 12 months, which-
ever comes first (every engine oil change). Inspect
hydraulic brake hoses for surface cracking, scuffing,
or worn spots. If the fabric casing of the rubber hose
becomes exposed due to cracks or abrasions in the
rubber hose cover, the hose should be replaced imme-
diately. Eventual deterioration of the hose can take
place with possible burst failure. Faulty installation
can cause twisting, resulting in wheel, tire, or chassis
interference.
The brake tubing should be inspected periodically
for evidence of physical damage or contact with mov-
ing or hot components.
The flexible brake tube sections used on this vehi-
cle in the primary and secondary tubes from the
master cylinder to the ABS hydraulic control unit
connections must also be inspected. This flexible tub-
ing must be inspected for kinks, fraying and contact
with other components or with the body of the vehi-
cle.
BRAKE PADS/SHOES - FRONT
REMOVAL
REMOVAL - FRONT DISC BRAKE SHOES
(DISC/DISC BRAKES)
(1) Raise the vehicle. (Refer to LUBRICATION &
MAINTENANCE/HOISTING - STANDARD PROCE-
DURE).
(2) Remove both front wheel and tire assemblies.
(3) Begin on one side of the vehicle.
(4) Remove the anti-rattle clip from the outboard
side of the caliper and adapter.
(5) Remove the two caliper guide pin bolts.
(6) Remove caliper from caliper adapter and brake
rotor.
CAUTION: Supporting weight of caliper by the flex-
ible brake fluid hose can damage the hose.
(7) Using wire or cord, hang the caliper from the
front strut assembly (Fig. 20). Support the caliper
firmly to prevent weight of caliper from being sup-
ported by the brake fluid hose.
(8) Remove the outboard brake shoe from the cali-
per adapter.
(9) Pull the inboard brake shoe away from the cal-
iper piston until the retaining clip on shoe is free
from the cavity in the caliper piston (Fig. 21).
(10) Repeat the above procedure on other side of
the vehicle.
Fig. 20 Stored Front Disc Brake Caliper
1 - STEERING KNUCKLE
2 - BRAKE FLEX HOSE
3 - CALIPER ASSEMBLY
4 - WIRE HANGER
5 - STRUT ASSEMBLY
RSBRAKES - BASE5-17
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REMOVAL - FRONT DISC BRAKE SHOES
(DISC/DRUM BRAKES)
(1) Raise the vehicle. Refer to HOISTING in
LUBRICATION AND MAINTENANCE.
NOTE: Perform Step 2 through Step 5 on each side
of the vehicle.
(2) Remove the front tire and wheel assembly.
(3) Remove the two brake caliper guide pin bolts
(Fig. 22).(4) Remove the disc brake caliper from the disc
brake adapter and hang out of the way using wire or
a bungee cord. Use care not to overextend the brake
hose when doing this.
(5) Remove the brake shoes from the disc brake
caliper adapter.
CLEANING - DISC BRAKE SHOES
WARNING: DUST AND DIRT ACCUMULATING ON
BRAKE PARTS DURING NORMAL USE MAY CON-
TAIN ASBESTOS FIBERS FROM PRODUCTION OR
AFTERMARKET BRAKE LININGS. BREATHING
EXCESSIVE CONCENTRATIONS OF ASBESTOS
FIBERS CAN CAUSE SERIOUS BODILY HARM.
EXERCISE CARE WHEN SERVICING BRAKE
PARTS. DO NOT SAND OR GRIND BRAKE LINING
UNLESS EQUIPMENT USED IS DESIGNED TO CON-
TAIN THE DUST RESIDUE. DO NOT CLEAN BRAKE
PARTS WITH COMPRESSED AIR OR BY DRY
BRUSHING. CLEANING SHOULD BE DONE BY
DAMPENING THE BRAKE COMPONENTS WITH A
FINE MIST OF WATER, THEN WIPING THE BRAKE
COMPONENTS CLEAN WITH A DAMPENED CLOTH.
DISPOSE OF CLOTH AND ALL RESIDUE CONTAIN-
ING ASBESTOS FIBERS IN AN IMPERMEABLE
CONTAINER WITH THE APPROPRIATE LABEL. FOL-
LOW PRACTICES PRESCRIBED BY THE OCCUPA-
TIONAL SAFETY AND HEALTH ADMINISTRATION
(OSHA) AND THE ENVIRONMENTAL PROTECTION
AGENCY (EPA) FOR THE HANDLING, PROCESSING,
AND DISPOSING OF DUST OR DEBRIS THAT MAY
CONTAIN ASBESTOS FIBERS.
INSPECTION - DISC BRAKE SHOES
Visually inspect brake shoes (pads) for uneven lin-
ing wear. Also inspect for excessive lining deteriora-
tion. Check the clearance between the tips of the
wear indicators on the shoes (if equipped) and the
brake rotors.
If a visual inspection does not adequately deter-
mine the condition of the lining, a physical check will
be necessary. To check the amount of lining wear,
remove the disc brake shoes from the calipers.
Measure each brake shoe. The combined brake
shoe and its lining material thickness should be mea-
sured at its thinnest point.
²For front disc brake shoes, when a set of brake
shoes are worn to a thickness of approximately 7.95
mm (5/16 inch), they should be replaced.
²For rear disc brake shoes, when a set of brake
shoes are worn to a thickness of approximately 7.0
mm (9/32 inch), they should be replaced.
²Typically, if front shoes are worn out, both fronts
and rears need to be replaced. Make sure to check
rears.
Fig. 21 Removing Inboard Shoe
1 - INBOARD BRAKE SHOE
2 - HANGER WIRE
3 - CALIPER ASSEMBLY
4 - RETAINING CLIP
5 - PISTON
Fig. 22 Brake Caliper Mounting (Typical)
1 - BRAKE HOSE
2 - ADAPTER MOUNTING BOLTS
3 - BANJO BOLT
4 - CALIPER GUIDE PIN BOLTS
5 - 18 BRAKES - BASERS
BRAKE PADS/SHOES - FRONT (Continued)
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Replacebothdisc brake shoes (inboard and out-
board) on each caliper. It is necessary to replace the
shoes on the opposite side of the vehicle as well as
the shoes failing inspection.
If the brake shoe assemblies do not require
replacement, be sure to reinstall the brake shoes in
the original position they were removed from.
INSTALLATION
INSTALLATION - FRONT DISC BRAKE SHOES
NOTE: There may be more than 1 lining material
released. Make sure proper linings are being
installed.
(1) Begin on one side of the vehicle or the other.
(2) Completely retract the caliper piston back into
its bore in the brake caliper (This is required for cal-
iper installation on the brake rotor with new brake
shoes installed).
(3) If applied, remove the protective paper from
the noise suppression gasket on the rear of both the
inner and outer brake shoe assemblies.
(4) Install the new inboard brake shoe into the cal-
iper piston by firmly pressing its retaining clip into
the piston bore. Be sure the inboard brake shoe is
positioned squarely against the face of the caliper
piston.
(5) Lubricate both adapter abutments where the
shoes slide with a small amount of MopartDielectric
grease, or equivalent.
(6) Slide the new outboard brake shoe into the cal-
iper adapter with the lining up against the outside of
the brake rotor.
CAUTION: Use care when installing the caliper
assembly onto the caliper adapter, so the caliper
guide pin bushings do not get damaged by the
adapter bosses.
(7) Carefully position the brake caliper over the
brake rotor and adapter.
(8) Install the caliper guide pin bolts and tighten
to a torque of 35 N´m (26 ft. lbs.).Extreme caution
should be taken not to cross thread the caliper
guide pin bolts.
(9) Install the caps over the caliper guide pin bolts.
(10) Install the new caliper hold down spring (anti-
rattle clip) on the outboard side of the caliper. Start
the spring into the holes on the caliper, then stretch
the clip legs past the abutments on the caliper
adapter.
(11) Repeat the above procedure on other side of
the vehicle.(12) Install the wheel and tire assemblies. Tighten
the wheel mounting nuts in proper sequence until all
nuts are torqued to half specification, then repeat the
tightening sequence to the full specified torque of 135
N´m (100 ft. lbs.).
(13) Lower vehicle.
(14) Pump the brake pedal several times. This will
set the shoes to the brake rotor.
(15) Check and adjust brake fluid level as neces-
sary.
(16) Road test the vehicle and make several stops
to wear off any foreign material on the brakes and to
seat the brake shoes.
INSTALLATION - FRONT DISC BRAKE SHOES
(DISC/DRUM BRAKES)
NOTE: Perform steps Step 1 through Step 5on each
side of the vehicle.
(1) Place the brake shoes in the adapter anti-rattle
clips.
(2) Completely retract the caliper piston back into
the bore of the caliper.
CAUTION: Use care when installing the caliper onto
the disc brake adapter to avoid damaging the boots
on the caliper guide pins.
(3) Install the disc brake caliper over the brake
shoes on the brake caliper adapter.
(4) Align the caliper guide pin bolt holes with the
guide pins. Install the caliper guide pin bolts and
tighten them to a torque of 35 N´m (26 ft. lbs.) (Fig.
22).
(5) Install the tire and wheel assembly. Tighten
the wheel mounting nuts to a torque of 135 N´m (100
ft. lbs.).
(6) Lower the vehicle.
(7) Pump the brake pedal several times. This will
set the shoes to the brake rotor.
(8) Check and adjust the brake fluid level as nec-
essary.
(9) Road test the vehicle and make several stops to
wear off any foreign material on the brakes and to
seat the brake shoes.
BRAKE PADS/SHOES - REAR
DISC
REMOVAL - REAR DISC BRAKE SHOES
(1) Raise vehicle. (Refer to LUBRICATION &
MAINTENANCE/HOISTING - STANDARD PROCE-
DURE).
RSBRAKES - BASE5-19
BRAKE PADS/SHOES - FRONT (Continued)
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(2) Remove rear wheel and tire assemblies from
vehicle.
(3) Remove the caliper to adapter guide pin bolts
(Fig. 23).
(4) Remove rear caliper from adapter using the fol-
lowing procedure. First rotate front of caliper up
from the adapter. Then pull the rear of the caliper
and the outboard brake shoe anti-rattle clip out from
under the rear abutment on the adapter (Fig. 24).(5) Support caliper to prevent the weight of the
caliper from damaging the flexible brake hose (Fig.
25).
(6) If the brake rotor needs to be removed it can be
removed by removing the retainer clips and then
pulling the rotor straight off the wheel mounting
studs.
(7) Remove the outboard brake shoe from the cali-
per. Brake shoe is removed by pushing the shoe
toward the piston, disengaging the two metal protru-
sions on the shoe back, then sliding the brake shoe
off the caliper.
(8) Remove inboard brake shoe from caliper.
Inboard brake shoe is removed by pulling it out of
the caliper piston, until the retaining clip is free of
the piston (Fig. 26).
Fig. 23 Caliper Guide Pin Bolts
1 - DISC BRAKE CALIPER
2 - ADAPTER
3 - AXLE
4 - GUIDE PIN BOLTS
5 - DRIVESHAFT (AWD MODELS ONLY)
Fig. 24 Removing/Installing Caliper
1 - LIFT THIS END OF CALIPER AWAY FROM ADAPTER FIRST
2 - DISC BRAKE CALIPER
3 - ADAPTER ABUTMENT
4 - OUTBOARD BRAKE SHOE HOLD DOWN CLIP
5 - OUTBOARD BRAKE SHOE
6 - ROTOR
7 - ADAPTER
Fig. 25 Correctly Supported Caliper
1 - WIRE
2 - CALIPER
3 - ADAPTER
4 - ROTOR
5 - INNER FENDER
5 - 20 BRAKES - BASERS
BRAKE PADS/SHOES - REAR DISC (Continued)
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CAUTION: When installing the caliper guide pin
bolts extreme caution should be taken not to
crossthread the guide pin bolts.
(7) Install the caliper guide pin bolts. Tighten the
guide pin bolts to a torque of 35 N´m (26 ft. lbs.).
(8) Install the wheel and tire assembly. Tighten
the wheel mounting nuts in proper sequence until all
nuts are torqued to half specification. Then repeat
the tightening sequence to the full specified torque of
135 N´m (100 ft. lbs.).
(9) Lower vehicle.
CAUTION: Before moving vehicle, pump the brake
pedal several times to insure the vehicle has a firm
brake pedal to adequately stop the vehicle.
(10) Pump brake pedal several times to set brake
shoes to rotors.
(11) Check fluid level in reservoir.
(12) Road test the vehicle and make several stops
to wear off any foreign material on the brakes and to
seat the brake shoe linings.
BRAKE PADS/SHOES - REAR
DRUM
REMOVAL - REAR DRUM BRAKE SHOES
(1) Raise vehicle. (Refer to LUBRICATION &
MAINTENANCE/HOISTING - STANDARD PROCE-
DURE).
(2) Remove the rear wheel and tire assemblies
from the vehicle.
(3) Remove rear brake drum to hub retaining clips
(if equipped), then remove rear brake drums. (Refer
to 5 - BRAKES/HYDRAULIC/MECHANICAL/DRUM
- REMOVAL)
NOTE: When creating slack in the park brake cables
by locking out the automatic adjuster, (Fig. 27) be
sure that the park brake pedal is in the released
(most upward) position.(4) Create slack in the rear park brake cables.
Slack is created by grabbing exposed section of front
park brake cable and pulling it down and rearward.
Slack is maintained in the park brake cable by
installing a pair of locking pliers on the park brake
cable just rearward ofonly the rearbody outrigger
bracket. (Fig. 27)
(5) Remove adjustment lever spring (Fig. 28) from
adjustment lever and front brake shoe.
Fig. 27 Locked Out Park Brake Automatic Adjuster
1 - PARK BRAKE CABLE
2 - REAR BODY OUTRIGGER BRACKET
3 - LOCKING PLIERS
Fig. 28 Adjustment Lever Actuating Spring
1 - TRAILING BRAKE SHOE
2 - LEADING BRAKE SHOE
3 - AUTOMATIC ADJUSTER LEVER
4 - ADJUSTER LEVER ACTUATING SPRING
5 - 22 BRAKES - BASERS
BRAKE PADS/SHOES - REAR DISC (Continued)
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(6) Remove adjustment lever (Fig. 29) from leading
brake shoe.
(7) Remove the brake shoe to brake shoe lower
return springs (Fig. 30) and (Fig. 31).(8) Remove the tension clip (Fig. 32) attaching the
upper return spring to the automatic adjuster assem-
bly.
Fig. 29 Adjustment Lever
1 - AUTOMATIC ADJUSTER
2 - LEADING BRAKE SHOE
3 - AUTOMATIC ADJUSTER LEVER
Fig. 30 Remove/Install Brake Shoe Lower Return
Spring
1 - ANCHOR PLATE
2 - LOWER BRAKE SHOE RETURN SPRING
3 - REAR BRAKE SHOE
4 - FRONT BRAKE SHOE
5 - BRAKE SUPPORT PLATE
Fig. 31 Brake Shoe Lower Return Spring
1 - TRAILING BRAKE SHOE
2 - LEADING BRAKE SHOE
3 - RETURN SPRING
Fig. 32 Tension Clip Attachment To Adjuster
1 - WHEEL CYLINDER
2 - BRAKE SHOE UPPER RETURN SPRING
3 - AUTOMATIC ADJUSTER LEVER
4 - TENSION CLIP
5 - AUTOMATIC ADJUSTER ASSEMBLY
RSBRAKES - BASE5-23
BRAKE PADS/SHOES - REAR DRUM (Continued)
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(13) Remove the park brake actuator (Fig. 37)
from the leading brake shoe and transfer to the
replacement brake shoe.
INSPECTION - REAR DRUM BRAKE SHOE
LINING
(1) Remove the tire and wheel assembly from the
vehicle
(2) Remove the rear brake adjusting hole plug
found in the brake support.
(3) Insert a thin screwdriver into brake adjusting
hole to hold the adjusting lever away from the
notches on the adjusting screw star wheel.
(4) Insert Tool C-3784 into brake adjusting hole
and engage notches of brake adjusting screw star
wheel. Release brake by prying down with adjusting
tool.
(5) Remove the rear brake drum from the rear hub
and bearing assembly. (Refer to 5 - BRAKES/HY-
DRAULIC/MECHANICAL/DRUM - REMOVAL)
(6) Inspect brake lining for wear, shoe alignment,
and or contamination from grease or brake fluid.
INSTALLATION - REAR DRUM BRAKE SHOES
(1) Lubricate the eight shoe contact areas on the
support plate and anchor, (Fig. 38) using the
required special MopartBrake Lubricant or equiva-
lent.
(2) Install leading brake shoe on brake support
plate. Install the leading brake shoe hold down
spring and pin (Fig. 36) on the brake shoe.
(3) Install the park brake actuator strut (Fig. 39)
on the leading brake shoe. Then install the park
brake actuator lever on the strut (Fig. 39).(4) Install the automatic adjuster screw on the
leading brake shoe. Then install the trailing brake
shoe on the park brake actuating lever and park
brake actuating strut (Fig. 35). Position trailing
brake shoe on brake support plate.
(5) Install the brake shoe hold down pin and
spring on the trailing brake shoe (Fig. 34).
(6) Install the brake shoe to brake shoe upper
return spring (Fig. 33).
Fig. 37 Park Brake Actuator Plate
1 - RETAINING CLIP
2 - BRAKE SHOE ASSEMBLY
3 - ACTUATOR PLATE
Fig. 38 Brake Support Plate Contact Areas
1 - REAR BRAKE SUPPORT PLATE
Fig. 39 Park Brake Components Assembled On
Leading Brake Shoe
1 - PARK BRAKE CABLE
2 - LEADING BRAKE SHOE
3 - PARK BRAKE ACTUATING STRUT
4 - PARK BRAKE ACTUATING LEVER
5 - BRAKE SUPPORT PLATE
RSBRAKES - BASE5-25
BRAKE PADS/SHOES - REAR DRUM (Continued)
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CAUTION: When installing the tension clip on the
automatic adjuster, it must be located on only the
threaded area of the adjuster assembly (Fig. 32). If
it is located on a non-threaded area of the adjuster,
the function of the automatic adjuster will be
affected.
(7) Install the tension clip (Fig. 32) attaching the
upper return spring to the automatic adjuster assem-
bly.
(8) Install the brake shoe to brake shoe lower
return springs on the brake shoes (Fig. 30) and (Fig.
31).
(9) Install automatic adjustment lever on the lead-
ing brake shoe of the rear brake assembly (Fig. 29).
(10) Install the actuating spring on the automatic
adjustment lever and leading brake shoe assembly
(Fig. 28).
(11) Verify that the automatic adjuster lever has
positive contact with the star wheel on the automatic
adjuster assembly.
(12) When all components of both rear brake
assemblies are correctly and fully installed, remove
the locking pliers from the front park brake cable.
(13) Adjust brake shoes assemblies so as not to
interfere with brake drum installation.
(14) Install the rear brake drums on the hubs.
(15) Adjust rear brake shoes.
(16) Install the wheel and tire assembly.
(17) Tighten the wheel mounting stud nuts in
proper sequence until all nuts are torqued to half
specification. Then repeat the tightening sequence to
the full specified torque of 135 N´m (100 ft. lbs.).
(18) Lower the vehicle.
(19) Push the parking brake lever (pedal) to the
floor once and release pedal. This will automatically
remove the slack from and correctly adjust the park-
ing brake cables.
(20) Road test vehicle. The automatic adjuster will
continue the brake adjustment during the road test
of the vehicle.
ADJUSTMENTS
ADJUSTMENT - REAR DRUM BRAKE SHOES
NOTE: Normally, self-adjusting drum brakes do not
require manual brake shoe adjustment. Although, in
the event of a brake shoe replacement, it is advis-
able to make the initial adjustment manually to
speed up the adjusting time.
NOTE: Before raising the vehicle, verify the parking
brake lever is fully released.(1) Raise the vehicle. (Refer to LUBRICATION &
MAINTENANCE/HOISTING - STANDARD PROCE-
DURE).
(2) Remove rubber plug from rear brake adjusting
hole in the rear brake support plate.
(3) Insert a thin screwdriver through the adjusting
hole in the support plate and against the star wheel
of the adjusting screw. Move handle of the tool
upward rotating the star wheel until a slight drag is
felt when tire and wheel assembly is rotated.
(4) Insert a second thin screwdriver or piece of
welding rod into brake adjusting hole and push the
adjusting lever out of engagement with the star
wheel.Care should be taken so as not to bend
adjusting lever or distort lever spring.
(5) While holding the adjusting lever out of
engagement, back off the star wheel just enough to
ensure a free wheel with no brake shoe drag.
(6) Repeat the above adjustment at the other rear
wheel.
(7) Install the adjusting hole rubber plugs back in
the rear brake support plates.
(8) Lower the vehicle.
DISC BRAKE CALIPER -
FRONT
REMOVAL
REMOVAL - FRONT DISC BRAKE CALIPER
(DISC/DISC BRAKES)
(1) Depress the brake pedal past its first inch of
travel and hold it in this position using a brake pedal
depressor (holding) tool. This is done to isolate the
master cylinder from the brake hydraulic system dis-
allowing the brake fluid to completely drain out of
the brake fluid reservoir.
(2) Raise the vehicle. (Refer to LUBRICATION &
MAINTENANCE/HOISTING - STANDARD PROCE-
DURE).
(3) Remove front wheel and tire assembly.
(4) Remove the banjo bolt connecting the brake
hose to the brake caliper. There are two washers (one
on each side of the brake hose fitting) that will come
off with the banjo bolt. Discard these washers.
(5) Remove the 2 caliper guide pin bolts.
(6) Remove the brake caliper from the adapter.
REMOVAL - FRONT DISC BRAKE CALIPER
(DISC/DRUM BRAKES)
(1) Using a brake pedal holding tool, depress the
brake pedal past its first one inch of travel and hold
it in this position. This will isolate the master cylin-
der from the brake hydraulic system and will not
5 - 26 BRAKES - BASERS
BRAKE PADS/SHOES - REAR DRUM (Continued)
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allow the brake fluid to drain out of the master cyl-
inder reservoir when the lines are opened.
(2) Raise the vehicle. Refer to HOISTING in
LUBRICATION AND MAINTENANCE.
(3) Remove the front tire and wheel assembly.
(4) Remove the banjo bolt connecting the brake
hose to the brake caliper (Fig. 40). There are two
washers (one on each side of the flex hose fitting)
that will come off with the banjo bolt. Discard the
washers.
(5) Remove the two brake caliper guide pin bolts
(Fig. 40).
(6) Remove the disc brake caliper from the disc
brake adapter.
DISASSEMBLY
DISASSEMBLY - CALIPER GUIDE PIN
BUSHINGS (DISC/DISC BRAKES)
Before disassembling the brake caliper, clean and
inspect it. Refer to CLEANING or INSPECTION in
this section.
(1) Using your fingers, collapse one side of the rub-
ber guide pin bushing. Pull the guide pin bushing out
the other side of the brake caliper mounting boss.
(2) Repeat this procedure on the remaining bush-
ing.
DISASSEMBLY - CALIPER PISTON AND SEAL
WARNING: UNDER NO CONDITION SHOULD HIGH
PRESSURE AIR EVER BE USED TO REMOVE A PIS-
TON FROM A CALIPER BORE. PERSONAL INJURY
COULD RESULT FROM SUCH A PRACTICE.
NOTE: Before disassembling the brake caliper,
clean and inspect it. Refer to CLEANING AND
INSPECTION in this section.
NOTE: The safest way to remove the piston from
the caliper bore is to use the hydraulic pressure of
the vehicle's brake system.
(1) Following the removal procedure in DISC
BRAKE SHOES found in this section, remove the
caliper from the brake rotor and hang the assembly
on a wire hook away from rotor and body of the vehi-
cle so brake fluid cannot get on these components.
Remove the brake shoes, and place a small piece of
wood between the piston and caliper fingers.
(2) Carefully depress the brake pedal to hydrauli-
cally push piston out of its bore. Once completed,
apply and hold down the brake pedal to any position
beyond the first inch of pedal travel using a brake
pedal holding tool. This will prevent the fluid in the
master cylinder reservoir from completely draining
out.
(3) Disconnect the brake fluid flex hose from the
caliper assembly and remove it from the vehicle.
CAUTION: Do not use excessive force when clamp-
ing caliper in vise. Excessive vise pressure will
cause bore distortion.
(4) Mount the caliper in a vise equipped with pro-
tective jaws.
(5) Remove the piston dust boot from the caliper
and discard.
NOTE: Do not use a screw driver or other metal tool
for seal removal. Using such tools can scratch the
bore or leave burrs on the seal groove edges.
(6) Using a soft tool such as a plastic trim stick,
work the piston seal out of its groove in caliper pis-
ton bore (Fig. 41). Discard the old seal.
(7) Clean the piston bore and drilled passage ways
using alcohol or a suitable solvent. Wipe it dry using
only a lint-free cloth.
(8) Inspect the piston bore for scoring or pitting.
Bores that show light scratches or corrosion can usu-
ally be cleared of the light scratches or corrosion
using crocus cloth.
Fig. 40 Brake Caliper Mounting (Typical)
1 - BRAKE HOSE
2 - ADAPTER MOUNTING BOLTS
3 - BANJO BOLT
4 - CALIPER GUIDE PIN BOLTS
RSBRAKES - BASE5-27
DISC BRAKE CALIPER - FRONT (Continued)
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