Cessna 150 Series Service Manual page 82

5-54. TROUBLE SHOOTING.
TROUBLE PROBABLE CAUSE REMEDY
DRAGGING BRAKES. Brake pedal binding. Check and adjust properly.
Parking brake linkage holding Check and adjust properly.
brake pedal down.
Worn or broken piston return Repair, or install new cylinder.
spring (in master cylinder.)
Insufficient clearance at Lock- Adjust as outlined in para-
O-Seal or incorrect adjustment of graph 5-60.
cylinder overall length.
Restriction in hydraulic lines or Drain brake line and clear the
restrictions in compensating port inside of the brake line with
in brake master cylinder. filtered compressed air. If
cleaning the lines fails to give
satisfactory results, the master
cylinder may be faulty and
should be repaired.
Worn, scored or warped brake disc. Install new disc and brake linings.
Damaged or accumulated dirt Clean and repair or install new
restricting free movement of wheel parts as necessary.
brake parts.
BRAKES FAIL TO OPERATE. Leak in system. If brake master cylinders or wheel
cylinder assemblies are leaking,
repair, or install new parts.
Air in system. Bleed system.
Lack of fluid in master cylinders. Fill and bleed system.
Defective master cylinder. Repair, or install new parts.
SHOP NOTES:
5-19