2002 ISUZU AXIOM wheel

5C±71 POWER±ASSISTED BRAKE SYSTEM
NOTE: Do not allow the fluid level in the reservoir to go
below the half±way mark.
12. Reconnect the brake pipe (1) to the master cylinder
and tighten the pipe.
13. Depress the brake pedal slowly once and hold it
depressed.
14. Loosen the rear wheel brake pipe (1) at the master
cylinder.
15. Retighten the brake pipe, then release the brake
pedal slowly.
16. Repeat steps 13 through 15 until no air comes out of
the port when the brake pipe is loosened
NOTE: Be very careful not to allow the brake fluid to come
in contact with painted surfaces.
330R200004
17. Bleed the air from the front wheel brake pipe
connection (2) by repeating steps 7 through 16.
Bleeding the Caliper
18. Bleed the air from each wheel in the order listed
below:

Right rear caliper or wheel cylinder

Left rear caliper or wheel cylinder

Right front caliper

Left front caliper
Conduct air bleeding from the wheels in the above
order. If no brake fluid comes out, it suggests that air
is mixed in the master cylinder. In this case, bleed air
from the master cylinder in accordance with steps 7
through 17, and then bleed air from the caliper or
wheel cylinder.
19. Place the proper size box end wrench over the
bleeder screw.
20. Cover the bleeder screw with a transparent tube, and
submerge the free end of the transparent tube in a
transparent container containing brake fluid.
21. Pump the brake pedal slowly three (3) times
(once/sec), then hold it depressed.
22. Loosen the bleeder screw until fluid flows through the
tube.
23. Retighten the bleeder screw.24. Release the brake pedal slowly.
25. Repeat steps 21 through 24 until the air is completely
removed.
It may be necessary to repeat the bleeding procedure
10 or more times for front wheels and 15 or more
times for rear wheels.
26. Go to the next wheel in the sequence after each wheel
is bled.
Be sure to monitor reservoir fluid level.
27. Depress the brake pedal to check if you feel
ªsponginessº after the air has been removed from all
wheel cylinders and calipers.
If the pedal feels ªspongyº, the entire bleeding
procedure must be repeated.
28. After the bleeding operation is completed on the each
individual wheel, check the level of the brake fluid in
the reservoir and replenish up to the ªMAXº level as
necessary.
29. Attach the reservoir cap.
If the diaphragm inside the cap is deformed, reform
it and install.
30. Stop the engine.
Flushing Brake Hydraulic System
It is recommended that the entire hydraulic system be
thoroughly flushed with clean brake fluid whenever new
parts are installed in the hydraulic system. Approximately
one quart of fluid is required to flush the hydraulic system.
The system must be flushed if there is any doubt as to the
grade of fluid in the system or if fluid has been used which
contains the slightest trace of mineral oil. All rubber parts
that have been subjected to a contaminated fluid must be
replaced.
Brake Pipes and Hoses
The hydraulic brake system components are
interconnected by special steel piping and flexible hoses.
Flexible hoses are used between the frame and the front
calipers, the frame and rear axle case and the rear axle
and the rear calipers.
When the hydraulic pipes have been disconnected for
any reason, the brake system must be bled after
reconnecting the pipe. Refer to
Bleeding the Brake
Hydraulic System
in this section.
Brake Hose Inspection
The brake hose should be inspected at least twice a year.
The brake hose assembly should be checked for road
hazard, cracks and chafing of the outer cover, and for
leaks and blisters. Inspect for proper routing and
mounting of the hose. A brake hose that rubs on
suspension components will wear and eventually fail. A
light and mirror may be needed for an adequate
inspection. If any of the above conditions are observed on
the brake hose, adjust or replace the hose as necessary.
CAUTION: Never allow brake components such as
calipers to hang from the brake hoses, as damage to
the hoses may occur.

5C±72
POWER±ASSISTED BRAKE SYSTEM
Front Caliper Brake Hose
Front Caliper Brake Hose and
Associated Parts
352RW001
Legend
(1) Bolt and Gasket
(2) Clip
(3) Hose
(4) Brake Pipe
Removal
1. Raise the vehicle and support it with suitable safety
stands.
2. Remove the wheel and tire assembly.
3. Clean dirt, grease, and other foreign material off the
hose fittings at both ends.
4. Disconnect brake pipe.
5. Remove clip.
6. Remove bolt and gasket.
7. Remove hose.
Installation
To install, follow the removal steps in the reverse order,
noting the following points.
1. Tighten the brake pipes to the specified torque
Torque: 16 N´m (12 lb ft)
2. Tighten the bolt to the specified torque.
Torque: 35 N´m (26 lb ft)
NOTE: Always use new gaskets and be sure to put the
hooked edge of the flexible hose end into the anti±rotation
cavity.
After installing the brake hoses, bleed the brakes as
described in this section.

5C±73 POWER±ASSISTED BRAKE SYSTEM
Rear Axle Brake Hose
Rear Axle Brake Hose and Associated
Parts
352RW002
Legend
(1) Brake Pipe
(2) Clip
(3) Bolt
(4) Brake Pipe
(5) Hose
Removal
1. Raise the vehicle and support it with suitable safety
stands.
2. Remove wheel and tire assembly.
3. Clean dirt, grease, and other foreign material off the
hose fittings at both ends.
4. Disconnect brake pipe.
5. Remove clip.
6. Remove brake pipe.
7. Remove bolt.
8. Remove hose.
Installation
To install, follow the removal steps in the reverse order,
noting the following points.
1. Tighten the brake pipes to the specified torque
Torque: 16 N´m (12 lb ft)
2. Tighten the bolt to the specified torque.
Torque: 15 N´m (11 lb ft)
After installing the brake hoses, bleed the brakes as
described in this section.

5C±74
POWER±ASSISTED BRAKE SYSTEM
Brake Pipe
Removal
1. Raise the vehicle and support it with suitable safety
stands.
2. Remove wheel and tire assembly as necessary.
3. Clean dirt, grease, and other foreign material off the
pipe fittings at both ends.
4. Remove brake pipe (1).
330R200003
5. Remove plastic clip (2).
330RW002
Installation
To install, follow the removal steps in the reverse order,
noting the following points.
1. Tighten the brake pipes to the specified torque.
Master cylinder and P&B valve sides
Torque: 12 N´m (104 lb in)
Others
Torque: 16 N´m (12 lb ft)
After installing the brake pipes, bleed the brakes as
described in this section.

5C±75 POWER±ASSISTED BRAKE SYSTEM
P & B (Proportioning and Bypass) Valve
P & B (Proportioning and Bypass)
Valve Sectional View
350RW014
Legend
(1) Master Cylinder (Secondary)
(2) Master Cylinder (Primary)
(3) Rear Brake
(4) Front Brake
The P&B valve contains two sections, each serving a
different function.
The proportioning section of the P&B valve proportions
outlet pressure to the rear brakes after a predetermined
rear input pressure has been reached. This is done to
prevent rear wheel lock up on the vehicles with light rear
wheel loads. The valve has a by±pass feature which
assures full system pressure to the rear brakes in the
event of front brake system malfunction. Also full front
pressure is retained in the event of rear brake
malfunction.
The P&B valve is not repairable and must be replaced as
complete assembly.
Removal
1. The P&B valve is not repairable and must be replaced
as a complete assembly. Care must be taken to
prevent brake fluid from contacting any painted
surface.
2. Remove hydraulic pipes (1) and plug the pipes (1) to
prevent the loss of fluid or the entrance of dirt.
3. Remove bolt (3).
4. Remove P&B valve (2).
350R200003
Installation
1. Install P&B valve (2).
2. Install bolt (3) and tighten the bolt to the specified
torque.
Torque: 22 N´m (16 lb ft)
3. Install hydraulic pipes (1) and tighten the bolt to the
specified torque.
Torque: 12 N´m (104 lb in)
4. After installing the brake pipes, bleed the brakes as
described in
Bleeding Brake Hydraulic System in this
section.

5C±78
POWER±ASSISTED BRAKE SYSTEM
Brake Pedal and Associated Parts
310RY00006
Legend
(1) Brake Pedal Bracket Assembly
(2) Fulcrum Pin and Nut
(3) Connector
(4) Snap Pin
(5) Return Spring(6) Peadl Assembly
(7) Push Rod Pin
(8) Lower Cover
(9) Bolts and Nut
(10) Driver Knee Bolster
Removal
1. Disconnect the battery ª±º terminal cable, and wait at
least 5 minutes.
2. Disconnect the yellow 3 way SRS connector located
under the steering column.
3. Remove the engine hood opening lever.
4. Remove lower cover (8).
5. Remove driver knee bolster (10).
6. Disconnect the stop light switch connector (3).
Disconnect the anti-theft control module connector.
Refer to
Body and Accessories section.
7. Remove snap pin (4) and push rod pin (7).
8. Remove the steering column shaft fixing bolt and nut
(9) on the steering wheel side, and lower the steering
column shaft.
9. Remove the brake pedal bracket assembly (1).
10. Remove return spring (5).
11. Remove fulcrum pin and nut (2).12. Remove pedal assembly (6).
Installation
1. Apply grease to the entire circumference of the
fulcrum pin.
2. Install pedal assembly (6) and fulcrum pin and nut (2).
Tighten the nut (2) to the specified torque.
Torque: 35 N´m (26 lb ft)
3. Install the brake pedal bracket assembly (1).
Tighten the bolts and nuts soecified torque.
Torque: 15 N´m (11 lb ft)
4. Install return spring (5).
5. Adjust pedal free travel.
Refer to
Brake Pedal Adjustment in this section.
6. Tighten the steering column fixing bolt (9) (dash
panel) to the specified torque.
Torque: 20 N´m (14 lb ft)

5C±91 POWER±ASSISTED BRAKE SYSTEM
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
Legend
(2) Inner Shim
(3) Wear Indicator
(4) Inner Side

5C±92
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.