Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Manual - part 1191

POWER-ASSISTED BRAKE SYSTEM

5C–31

Removal

NOTE:  If a squealing noise occurs from the front brake
while driving, check the pad wear indicator plate. If the
indicator plate contacts the rotor, the disc pad assembly
should be replaced.

• Draw out two–thirds of the brake fluid from the

reservoir.

• Raise the vehicle and support it with suitable safety

stands.

1. Remove wheel and tire assembly, refer to Wheels

and Tires System in Section 3E.

2. Remove pin bolt (1).

302R200028

3. Rotate caliper assembly and support the caliper

assembly so that the brake hose is not stretched or
damaged.

4. Remove pad assembly with shim.

5. Remove Clip.

Installation

1. Install clip.

302R200023

2. Apply special grease (approximately 0.2 g) to both

contacting   surfaces of the inner shims (2). Wipe off
extruded grease after installing. Install pad
assembly with shim.

302R200024

EndOFCallout

Legend

(2) Inner Shim
(3) Wear Indicator
(4) Inner Side

5C–32

POWER-ASSISTED BRAKE SYSTEM

3. Carefyully use adjustable pliers to bottom the piston

into the caliper bore. Do not pull or twist the flexible
hose or damage will occur.
Install caliper assembly. 
Set caliper assembly in place.

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

specified torque.

Torque: 45 N·m (33 lb ft)

302R200008

5. Install wheel and tire assembly, refer 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.

POWER-ASSISTED BRAKE SYSTEM

5C–33

Front Disc Brake Rotor

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, refer 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).

Maximum runout: 0.13 mm (0.005 in)

411R200008

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 29 mm (1.14
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 runout: 0.010 mm (0.0004 in)

411R200007

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 24.60 mm (0.969 in). The minimum
refinish dimension is 26.00 mm (1.024 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 26.00 mm (1.024 in). Do not
use a brake rotor that exceeds the manufacturers
specifications.

5C–34

POWER-ASSISTED BRAKE SYSTEM

Minimum wear dimension: 24.60 mm (1.024 in)

Refinish dimension: 26.00 mm (1.024 in) 

411R200009