Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Manual — part 192
5C–85
POWER–ASSISTED BRAKE SYSTEM
Vacuum Booster Assembly
Vacuum Booster Assembly and Associated Parts
331R200004
Legend
(1) Snap Pin
(2) Vacuum Booster Fixing Nut
(3) Vacuum Hose
(4) Master Cylinder
(5) Vacuum Booster
(6) Pin
Removal
1. Before removing the vacuum booster assembly,
disconnect and remove the brake pipes.
2. Remove master cylinder, refer to
Master Cylinder
Removal in this section.
CAUTION: When removing the master cylinder from
the vacuum booster, be sure to get rid of the internal
negative pressure of the vacuum booster (by,
disconnecting the vacuum hose) in advance.
If any negative pressure remains in the vacuum
booster, the piston may possibly come out when the
master cylinder is being removed, letting the brake
fluid run out.
Do not hold the piston while removing the master cy-
liner, the piston can be easily pulled out.
Outside surface of the piston is the surface on which
seals are to slide. Care should be taken to keep the
surface free of cuts and dents.
3. Remove vacuum hose.
4. Disconnect the yoke clevis from the brake pedal.
5. Remove vacuum booster fixing nut.
6. Remove vacuum booster.
5C–86 POWER–ASSISTED BRAKE SYSTEM
Inspection and Repair
Vacuum Hose (The built in check valve)
1. Inspect the check valve (2), which is installed inside
the vacuum hose.
2. Air should pass freely from the vacuum booster (3) to
the engine (1).
3. Air should not pass from the engine (1) to the vacuum
booster (3). If it does, the check valve is inoperative
and the vacuum hose built in the check valve must be
replaced.
HEC ENGINE
360RW001
6VD1 ENGINE
360RY00004
5C–87
POWER–ASSISTED BRAKE SYSTEM
Exterior Components
Exterior Components and Associated Parts
331R200006
Legend
(1) 2 Gaskets and Spacer
(2) Vacuum Booster
(3) Plate and Seal Assembly
(4) Retainer
(5) 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 2 gaskets and spacer.
4. Remove retainer, plate and seal assembly.
331RS003
5C–88 POWER–ASSISTED BRAKE SYSTEM
Inspection and Repair
Visual Check
Make necessary parts replacement if cuts, nicks,
excessive wear, or other abnormal conditions are found
through inspection.
NOTE: The parts listed below must be replaced with new
ones whenever the master cylinder is removed.
1. Plate and seal assembly
2. Retainer
Installation
1. Install plate and seal assembly.
2. Install retainer.
3. Install vacuum booster, refer to
Vacuum Booster in
this section.
4. 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.
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