Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Manual - part 1194

POWER-ASSISTED BRAKE SYSTEM

5C–43

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3. Carefyully use adjustable pliers to bottom the piston

into the caliper bore. Do not pull or twist the flex
hose or damage will occur.

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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–44

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 the dial indicator accordingly so that the stem

contacts the rotor surface to approximately     29mm
(1.14 in) from the rotor edge.

3. Rotate the rotor one complete turn and inspect for

signs of lateral runout. Lateral runout should     not
exceed 0.13 mm (0.005 in).
The lateral runout should not exceed 0.13 mm
(0.005 in)

Maximum runout: 0.13 mm (0.005 in)

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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)

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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.

POWER-ASSISTED BRAKE SYSTEM

5C–45

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 exceeds the manufacturers
specifications.

Minimum wear dimension: 16.6 mm (0.654 in)

Refinish dimension: 16.97 mm (0.668 in)

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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)

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5C–46

POWER-ASSISTED BRAKE SYSTEM

Rear Disc Brake Caliper Assembly (4

´4 Model)

Rear Disc Brake Caliper Assembly and Associated Parts

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EndOFCallout

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.

Legend

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

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