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TROUBLESHOOTING

Symptoms

Possible causes

Wheel brake

Brake pedal

Backing plate surface rough Shoe trapped on backing plate surface Backing plate deformed or incorrectly installed Lubricant or moisture on brake pad/lining surface Wear powder attached on brake pad/lining Brake pad/lining worn Incorrect contact of brake pad/lining Wheel cylinder malfunction Faulty wheel cylinder piston cup Shoe return spring fatigued or broken Disc rotor/brake drum glazed Brake drum deformed or center deviation Disc rotor thickness uneven Brake shoe deformed or damaged Brake shoe twisted or sagged Abnormal pedal return Pedal play insufficient Linkage rusted or deformed Return spring fatigued or broken Vacuum/hydraulic booster operating rod thrust

Brake fluid

Brake pipe over-tightened, resulting in poor fluid re- turn

Vacuum booster Hydraulic booster

Brake master cylinder

Axle

Faulty Faulty hydraulic booster Faulty piston cup Clogged return port Wheel hub bearing incorrectly adjusted King pin bushing worn Trunnion bearing worn

35A-32

Brake drum overheating

Brake noise

Overheating on all wheels

Overheating on specific wheel(s)

Noisy when vehicle is new, or after brake lining/pad replacement

Brakes used under severe conditions Other Judder Abnormal brake pedal return Brake drag

Reference Gr

O

O

O

O

O

O

O O

O O

O

  • O

    O

    • O

      O

    • O

      O

O

Gr26, 27

O

Gr26A

O

Gr26B

O

O

O O O

O

O O

O

O

O

O

O

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