MC012C-AS00 TRANSAXLE: HYDRAULIC AND PARK BRAKE SYSTEMS
Brake System Troubleshooting
2003 Pioneer 1200/1200SE Gasoline Vehicle Maintenance and Service Manual
Page 6-5
6
Vehicle pulls to one side, continued
Grease or brake fluid on the brake shoe
linings
Replace hub, axle seal or wheel cylinder
and replace the brake shoes. See Brake
Shoe Removal on page 6-8.
Loose or distorted brake cluster backing
plate
Tighten or replace the backing plate and/
or hardware.
Scored or warped brake drums
Replace the brake drums. See Brake
Drum Removal on page 6-6.
Water on the brake shoe linings
Apply the brakes several times to dry the
brake shoe linings.
Sticking wheel cylinder piston
Replace the wheel cylinder. See Wheel
Cylinder Replacement on page 6-19.
Faulty suspension parts
See Section 7 – Steering and Front
Suspension, or Section 9 – Rear
Suspension.
Pulsating brake pedal
Warped brake drums
Replace the brake drums. See Brake
Drum Removal on page 6-6.
Bent axle
Replace the axle. See Section 16 –
MC012C-AS00 Unitized Transaxle with
Differential Lock.
Worn or damaged front wheel bearings
Replace bearings. See Section 7 –
Steering and Front Suspension.
Decreasing brake pedal travel
Weak or broken brake shoe return springs
Replace return springs.
Sticking wheel cylinder piston
Replace the wheel cylinder. See Wheel
Cylinder Replacement on page 6-19.
Overly adjusted brake adjusters
Adjust brake adjusters. See Brake Shoe
Adjuster Replacement on page 6-21.
Improperly adjusted park brake
Adjust park brake. See Park Brake
Adjustment on page 6-35.
Noise and chatter – Squealing, clicking
or scraping sound upon brake
application
Bent, damaged or incorrect brake shoes
Replace the brake shoes. See Brake
Shoe Removal on page 6-8.
Worn out brake shoes
Replace the brake shoes. See Brake
Shoe Removal on page 6-8.
Foreign material embedded in brake shoe
linings
Replace the brake shoes. See Brake
Shoe Removal on page 6-8.
Broken brake shoe return springs or hold
down springs
Replace damaged parts.
Rough, grooved or dry brake shoe ledges
or backing plate bosses
Lubricate the bosses of the brake cluster
backing plate, and/or replace the brake
shoes. See Brake Cluster Inspection
and Cleaning on page 6-10. See Brake
Shoe Removal on page 6-8.
Brake drums are cracked or scored
Replace the brake drums. See Brake
Drum Removal on page 6-6.
All brakes drag
Binding brake pedal
Lubricate and adjust. See Section 5 –
Accelerator and Brake Pedal
Assemblies.
Soft or swollen rubber parts caused by
incorrect or contaminated brake fluid
Replace master cylinder. See Master
Cylinder Removal on page 6-29.
Troubleshooting Guide continued on next page...
TROUBLESHOOTING GUIDE
SYMPTOM
POSSIBLE CAUSES
CORRECTIVE ACTION
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