TROUBLE

PROBABLE CAUSE

CORRECTION

1.Unable to obtain sufficient hydraulic brake pressure or spongy pedal

Air in hydraulic system.

Brake pedal binding

Check for source, then bleed hydraulic system.

Check for freedom of movement of brake pedal and master cylinder

2. Excessive pedal travel

Incorrect installation

Leak in system—brake, master cylinder, fittings, or lines.

Defective master cylinder.

Back plate bolts loose.

Refer to Installation Instructions.

Locate leak and repair.

Repair or replace.

Torque bolts to proper value.

3. Brake Drag

Piston jammed in caliper

Foreign matter wedged in brakes

Master cylinder not releasing hydraulic pressure

Parking brake valve defective

Foreign matter lodged between torque pins and torque place bushings.

Bent torque plate.

Bent torque pins

Remove caliper and repair cylinder or piston

Locate and remove

Repair or replace master cylinder.

Repair or replace parking brake valve.

Clean and inspect . Replace if necessary.

Replace torque plate.

Replace torque pins.

4. Rapid disc and/or pad wear.

Dragging brakes

Excessive rusting, scoring, or pitting of brake disc

Excessive back plate defection caused by bent bolts or over torquing bolts.

Refer to Trouble #2

Clean or replace disc.

Check torque of bolts and replace bolts if bent.

5. Brakes won't hold.

Improper conditioning of brake pads.

Contaminated pads.

Insufficient hydraulic pressure.

Brake pad carburized (overheated)

Condition pads IAW Installation Instructions.

Replace pads.

Refer to Trouble #1.

Replace pads