Isuzu Rodeo UE. Manual - part 121

5C–45

POWER–ASSISTED BRAKE SYSTEM

306RW005

3. Use adjustable pliers to bottom the piston into the

caliper bore. Be careful not to damage the piston dust
boot and do not damage the flexible hose by twisting
or pulling it. Install caliper assembly.
Set caliper assembly in place.

302RS008

4. Install lock bolt (5) and tighten the bolt to the specified

torque.

Torque: 44 N·m (32 lb ft)

5. Install wheel and tire assembly, referring to “Wheels

and Tires System” in Section 3E.

6. Pump the brake pedal several times to make sure that

the pedal is firm.  Check the brake fluid level in the
reservoir after pumping the brakes.

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5C–46 POWER–ASSISTED BRAKE SYSTEM

Rear Disc Brake Rotor (4

×

4 Model)

Inspection

In the manufacturing of the brake rotor, all the tolerances
regarding surface finish, parallelism and lateral runout are
held very closely. Maintaining these tolerances provides
the surface necessary to assure smooth brake operation.

Lateral Runout

Lateral runout is the movement of the rotor from side to
side as it rotates on the spindle. This could also be
referred to as “rotor wobble”.
This movement causes the piston to be knocked back into
its bore. This results in additional pedal travel and a
vibration during braking.

Checking Lateral Runout

1. Adjust the wheel bearing correctly, referring to

“Differential” in Section 4A.

2. Attach a dial indicator to some portion of the

suspension so that the stem contacts the rotor face
about 29 mm (1.14 in) from the rotor edge.

3. Move the rotor one complete rotation.

1. The lateral runout should not exceed 0.13 mm

(0.005 in)

Maximum runout: 0.13 mm (0.005 in)

411RS019

Parallelism

Parallelism is the measurement of thickness of the rotor
at four or more points around the circumference of the
rotor. All measurement must be made at 22 mm (0.87 in)
from the edge of the rotor.
The rotor thickness must not vary more than 0.010 mm
(0.0004 in) from point to point.

Maximum parallelism: 0.010 mm (0.0004 in)

420RS013

Replacing Brake Rotors

When installing new brake rotors, do not refinish the
surfaces. These parts are at the correct level of surface
finish.

Refinishing Brake Rotors

Accurate control of the rotor tolerances is necessary for
proper performance of the disc brakes. Machining of the
rotor should be done only with precision equipment. All
brake rotors have a minimum thickness dimension cast
into them.  This dimension is the minimum wear
dimension and not a refinish dimension.  The minimum
wear dimension is 16.6 mm (0.654 in). The minimum
refinish dimension is 16.97 mm (0.668 in).
When refinishing rotors, always use sharp cutting tools or
bits. Dull or worn tools leave a poor surface finish which
will affect initial braking performance. Vibration
dampening attachments should always be used when
refinishing braking surfaces. These attachments
eliminate tool chatter and will result in better surface
finish.
After refinishing, replace any rotor that does not meet the
minimum thickness of 16.97 mm (0.668 in). Do not use a
brake rotor that will not meet the specification.

Minimum wear dimension: 16.6 mm (0.654 in)

Refinish dimension: 16.97 mm (0.668 in)

5C–47

POWER–ASSISTED BRAKE SYSTEM

420RW002

Rear Drum (In Disc) Inside Diameter
Check

Check the rear drum inside diameter by measuring at
more than two portions as shown in the illustration.
If the inside diameter is greater than the limit, replace the
rear rotor.

Standard: 210.0 mm (8.27 in)

Limit: 211.4 mm (8.32 in)

420RS035

5C–48 POWER–ASSISTED BRAKE SYSTEM

Rear Disc Brake Caliper Assembly (4

×

4 Model)

Rear Disc Brake Caliper Assembly and Associated Parts

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Legend

(1) Brake Flexible Hose
(2) Clip
(3) Lock Bolt

(4) Support Bracket
(5) Guide Bolt
(6) Pad Assembly with Shim
(7) Caliper Assembly

Removal

1. Raise the vehicle and support with suitable safety

stands.

2. Remove wheel and tire assembly, referring to

“Wheels and Tires System” in Section 3E.

3. Remove the bolt and gaskets, then disconnect the

flexible hose from the caliper and after disconnecting
the flexible hose (1), cap or tape the openings to
prevent entry of foreign material.

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4. Since the brake fluid flows out from the connecting

coupler, place a drain pan under the vehicle.

5. Remove lock bolt (3).
6. Remove guide bolt (2).

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7. Remove caliper assembly.
8. Remove support bracket with pad assembly and take

care not to damage the flexible brake hose when
removing the support bracket.

9. Remove pad assembly with shim and mark the lining

locations if they are to be reinstalled.