SAAB WIS ONLINE

INSPECTION

INSPECTION

Trouble and possible cause Corrective action
1. Insufficient braking

(1) Fluid leakage from the hydraulic mechanism

Repair or replace (cup, piston seal, piston boot, master cylinder piston kit, pipe or hose).

(2) Entry of air into the hydraulic mechanism

Bleed the air.

(3) Excessively wide shoe clearance

Adjust the clearance.

(4) Wear, deteriorated surface material, adhering water or fluid on the lining

Replace, grind or clean.

(5) Improper operation of master cylinder, disc caliper, brake booster or check valve

Correct or replace.

2. Unstable or uneven braking

(1) Fluid on the lining, drum or rotor

Eliminate cause of fluid leakage, clean, or replace.

(2) Drum or rotor eccentricity

Correct or replace the drum or rotor.

(3) Worn brake drum, or damage to the drum caused by sand

Correct by grinding, or replace.

(4) Improper lining contact, deteriorated surface material, improper inferior material, or wear

Correct by grinding, or replace.

(5) Deformed back plate

Correct or replace.

(6) Improper tire inflation

Inflate to correct pressure.

(7) Disordered wheel alignment

Adjust alignment.

(8) Loosened back plate or the support installing bolts

Retighten.

(9) Loosened wheel bearing

Retighten to normal tightening torque or replace.

(10) Trouble in the hydraulic system

Replace the cylinder, brake pipe or hose.

(11) Uneven effect of the parking brake

Check, adjust, or replace the rear brake and cable system.

3. Excessive pedal stroke

(1) Entry of air into the hydraulic mechanism

Bleed the air.

(2) Excessive play in the master cylinder push rod

Adjust.

(3) Fluid leakage from the hydraulic mechanism

Repair or replace (cup, piston seal, piston boot, master cylinder piston kit, pipe or hose).

(4) Improperly adjusted shoe clearance

Adjust.

(5) Improper lining contact or worn lining

Correct or replace.

4. Brake dragging or improper brake return

(1) Insufficient pedal play

Adjust play.

(2) Improper master cylinder return

Clean or replace the cylinder.

(3) Clogged hydraulic system

Replace.

(4) Improper return or adjustment of parking brake

Correct or adjust.

(5) Weakened spring tension or breakage of shoe return spring

Replace the spring.

(6) Excessively narrow shoe clearance

Adjust the clearance.

(7) Improper disc caliper operation

Correct or replace.

(8) Wheel bearing faulty

Replace the wheel bearing.

5. Brake noise (1) (creak sound)

(1) Hardened or deteriorated lining

Replace the shoe assembly or pad.

(2) Worn lining

Replace the shoe assembly or pad.

(3) Loosened back plate or the support installing bolts

Retighten.

(4) Loose wheel bearing

Retighten to normal tightening torque.

(5) Dirty drum or rotor

Clean the drum or rotor, or clean and replace the brake assembly.

6. Brake noise (2) (hissing sound)

(1) Worn lining

Replace the shoe assembly or pad.

(2) Improper installed shoe or pad

Correct or replace the shoe assembly or pad.

(3) Loose or bent drum or rotor

Retighten or replace.

7. Brake noise (3) (click sound)

In the case of the disc brake:

(1) Excessively worn pad or the support

Replace the pad or the support.

In the case of the drum brake:

(1) Excessively worn shoe ridge

Replace the back plate.

(2) Lack of oil on the shoe ridge surface and anchor

Add more grease.