Hino 600, Workshop Manual, Page: 234 / 451

BRAKE EQUIPMENT (MODELS WITH HYDRAULIC BRAKE) BR01–8
Power steering pump is noisy Insufficient power steering fluid Refill proper level.
Air trapped in the power steering fluid Bleed air from power steering system.
Contamination in the power steering
fluid Replace power steering pump and
fluid.
Severe reaction to pedal pressure
(Grabby brakes) Throttle valve cut in spring defective Replace booster assembly.
Binding brake pedal linkage Disassemble and lubricate.
Incorrect pads, or pads loose on plate Replace pads. Be sure pads are tight
on caliper.
Grease or brake fluid on pad Repair grease seal or caliper as
required. Replace pads in axle sets.
Loose caliper on caliper mounting
bracket Retighten.
Leakage between booster and mas-
ter cylinder Primary pressure seal or backup ring
of the master cylinder is worn or dam-
aged Replace master cylinder assembly.
Seal or O-ring of the booster end cap
assembly is worn or damaged Replace booster assembly.
Leakage from booster or power
steering pump Seal between backup pump and
booster is worn or damaged Replace the seals.
Backup pump mounting screw is loose Retighten.
Booster housing or power steering
pump is worn or damaged Replace booster assembly or power
steering pump.
Backup pump is worn or damaged Replace backup pump.
Seal of the booster flow switch is worn
or damaged Replace flow switch seals.
Symptom Possible cause Remedy/Prevention