Isuzu Trooper (2000 year). Manual - part 170

5C–28 POWER ASSISTED BRAKE SYSTEM

Exterior Components

Exterior Components and Associated Parts

331RW004

Legend

(1) Yoke Clevis
(2) Lock Nut
(3) Retaining Clip
(4) Valve Body Guard
(5) Silencer

(6) Filter
(7) 2 Gaskets and Spacer
(8) Vacuum Booster
(9) Retainer

(10) Plate and Seal Assembly

(11) Master Cylinder

Removal

1. Remove master cylinder, refer to “Master Cylinder” in

this section.

2. Remove vacuum booster, refer to “Vacuum Booster”

in this section.

3. Remove yoke clevis.
4. Remove lock nut.
5. Remove retaining clip.
6. Remove valve body guard.
7. Remove silencer.
8. Remove filter.
9. Remove 2 gaskets and spacer.

10. Remove retainer, use a small screwdriver to pry out

the retainer. Gently pull out the plate and seal
assembly from the shell.

331RS003

5C–29

POWER ASSISTED BRAKE SYSTEM

11. Remove plate and seal assembly.

Inspection and Repair

Visual Check

Make necessary parts replacement if cuts, nicks,
excessive wear, or other abnormal conditions are found
through inspection. Check the following parts:

D

Yoke clevis

D

Valve body guard

D

Silencer

D

Filter plate and seal assembly

Installation

1. Install plate and seal assembly.

2. Install retainer.
3. Install 2 gaskets and spacer.
4. Install filter.
5. Install silencer.
6. Install valve body guard.
7. Install retainer.
8. Install lock nut and tighten to the specified torque.

Torque: 20 N·m (15 lb ft)

9. Install yoke clevis.

10. Install vacuum booster, refer to “Vacuum Booster” in

this section.

11. Install master cylinder, refer to “Master Cylinder” in

this section and after installation, perform brake pedal
check and adjustment. Refer to “Brake Pedal” in this
section.

Vacuum Booster Overhaul

Vacuum Booster

The vacuum booster cannot be disassembled for repair.
Replace a defective vacuum booster with a new one.

5C–30 POWER ASSISTED BRAKE SYSTEM

Main Data and Specifications

General Specifications

Vacuum booster diaphragm diameter (Front)

205 mm (8.07 in)

Vacuum booster diaphragm diameter (Rear)

230 mm (9.06 in)

Push rod stroke

More than 32.0 mm (1.26 in)

Plunger diameter

10.25 mm (0.40 in)

Push rod diameter

27.4 mm (1.08 in)

Torque Specifications

C05RT003

5C–31

POWER ASSISTED BRAKE SYSTEM

Special Tools

ILLUSTRATION

TOOL NO.

TOOL NAME

J-39216

Push Rod Gauge

J-23738-A

Vacuum Pump

J-39241

Push Rod Support