2004 ISUZU TF SERIES wheel

spark plugs warning lights display brakes warning light wheel alignment

Page 452 of 4264

ISUZU TF SERIES 2004 Workshop Manual 5C-26 BRAKES

A bleeding operation is necessary to remove air from the
hydraulic brake system whenever air is introduced into the
hydraulic system. It may be necessary to bleed the hydraulic
s

5C-26 BRAKES

A bleeding operation is necessary to remove air from the
hydraulic brake system whenever air is introduced into the
hydraulic system. It may be necessary to bleed the hydraulic
system at all four brakes if air has been introduced through a
low fluid level or by disconnecting brake pipes at the master
cylinder. If a brake pipe is disconnected at one wheel, only that
wheel cylinder/caliper needs to be bled. If the pipes are
disconnected at any fitting located between the master cylinder
and brakes, then the brake system served by the disconnected
pipe must be bled.

1. Set the parking brake completely, then start the engine.
NOTE :
The vacuum booster will be damaged if the bleeding operation
is performed with the engine off.
2. Remove the master cylinder reservoir cap.

3. Fill the master cylinder reservoir with brake fluid. Keep the
reservoir at least half full during the air bleeding operation
4. Always use new brake fluid for replenishment.
5. In replenishing rake fluid, take care that air bubbles do no
t
enter the brake fluid.

When the master cylinder is replaced or overhauled, firs
t
bleed the air from the master cylinder, then from each
wheel cylinder and caliper following the procedures
described below.

Bleeding the Master Cylinder
6. Disconnect the rear wheel brake pipe (1) from the master
cylinder.
Check the fluid level and replenish as necessary. If
replenished, leave the system for at least one minute.
7. Depress the brake pedal slowly once and hold it depressed.
8. Completely seal the delivery port of the master cylinder with
your finger, where the pipe was disconnected then release
the brake pedal slowly.
9. Release your finger from the delivery port when the brake
pedal returns completely.
10. Repeat steps 7 through 9 until the brake fluid comes out o
f
the delivery port during step 7.
NOTE : Do not allow the fluid level in the reservoir to go below
the half-way mark.
11. Reconnect the brake pipe (1) to the master cylinder and
tighten the pipe.
12. Depress the brake pedal slowly once and hold it depressed.
13. Loosen the rear wheel brake pipe (1) at the master cylinder.
14. Retighten the brake pipe, then release the brake pedal
slowly.