Hino 600, Руководство по ремонту, Страница: 231 / 451

BRAKE EQUIPMENT (MODELS WITH HYDRAULIC BRAKE) BR01–5
TROUBLESHOOTING
EN0680101F300001
Symptom Possible cause Remedy/Prevention
No response upon working the
pedal or there is the feeling of step-
ping on sponge (Air trapped in the
brake lines) Insufficient seal of master cylinder sec-
ondary cup Replace master cylinder assembly.
Insufficient air bleeding Bleed air from brake line.
No response upon working the
pedal or there is the feeling of step-
ping on sponge Vapor lock in brake system Bleed air from brake.
Leakage of fluid from brake system Tighten further or replace gasket, O-
ring, cup, etc.
Poor quality brake fluid or improper
fluid (low boil point) Drain the system, flush and refill with
the recommended fluid.
Brake fluid decreases Leakage of brake fluid from brake sys-
tem Tighten further or replace gasket, O-
ring, etc.
Leakage of brake fluid from master cyl-
inder Replace master cylinder assembly.
Worn pad Replace pad if it is worn to limit. Refill
brake fluid.
Excessive pedal travel (though
there is response upon working the
pedal) Insufficient brake fluid in the master
cylinder Search the cause of insufficient fluid,
repair or replace it.Then refill fluid and
bleed air.
Air trapped in the brake lines Bleed air from brake lines.
Leakage of fluid from brake system Check the leak point, repair or replace.
Poor quality brake fluid or improper
fluid Drain the system, flush and refill with
the recommended fluid.
Contamination of the brake fluid Replace the brake system and refill
with the recommended fluid.
Insufficient seal of the master cylinder
cup Replace master cylinder assembly.
Unequal or unstable braking Pad is wet with grease or fluid Replace the pad.
Defective pad material (improper com-
bination) Replace the pad.
Non-uniform pad contact Correct.
Excessive abrasion loss of rotors Correct or replace.
Distorted rotors Correct or replace.
Loose hub bearing Adjust or replace the bearing.
Improper or unequal pneumatic pres-
sure of tire Adjust to proper pneumatic pressure.
Clogging of brake system Replace, the pipe, hose, etc.
Abnormal piston operation of the disc
brake Check the piston seal.