Troubleshoot Wheel Brake - Yale A7S1 Service Manual

Brake System

Troubleshoot Wheel Brake

Problem
Brake Spongy
Brake Noise
Brake Drum or Brake Shoe
surfaces damaged or
distorted
Braking Pressure Low
40
Fluid leak in brake system
Clearance of brake shoes not properly adjusted
Brake too hot
Poor contact between brake drum and brake shoe
Contamination on brake shoe
Contamination in brake fluid
Brake pedal (inching valve) improperly adjusted
Surface of brake shoes hardened or dirty
Bottom plate distorted or bolt loosened
Brake shoes distorted or installation incorrect
Brake shoes worn
Loose wheel bearing
Brake fluid on brake shoes
Clearance of brake shoes not properly adjusted
Wheel cylinder failure
Brake shoe return spring damaged
Brake drum failure
Fluid leak with brake system
Clearance of brake shoes not properly adjusted
Air in brake system
Adjustment of brake pedal incorrect
Cause
8000 YRM 2199
Solution
Repair
Adjust adjuster gear
Check if skidding exists
Adjust brake adjuster
Repair or replace brake
shoe
Inspect brake fluid
Adjust brake pedal
Repair or replace brake
shoes
Repair or replace plate
Repair or replace brake
shoes
Repair or replace brake
shoes
Repair or replace
Repair or replace brake
shoe
Adjust brake adjuster
Repair or replace
Replace
Repair or replace brake
drum
Repair leak
Adjust brake adjuster
Bleed air
Readjust