OPERATION CHASSIS (continued ) 2-90 WA320-3MC Problem Main causes Remedy BRAKE Brake is not applied when pedal is depressed Disc has reach wear limit Defective hydraulic system Lack of oil Air in brake line ( Replace disc) Add oil to specified level. See “24.5 EVERY 100 HOURS SERVICE” on page 3-46. Bleed air. See “24.2 WHEN REQUIRED” on page 3-31.
Brake drags or remains applied Vent hole of brake valve is clogged Clean Brakes squeal Disc is worn Large amount of water in axle oil Deteriorated axle oil due to overuse of brake ( Replace disc) Change axle oil Change axle oil PARKING BRAKE Braking effect is poor Disc is worn ( Replace disc) Brake drags or remains applied Lack of oil in transmission case Screen is clogged Add oil to specified level. See “24.2 WHEN REQUIRED” on page 3-31. ( Disassemble and clean) STEERING Steering wheel is heavy Defective hydraulic system Lack of oil Add oil to specified level. See “24.5 EVERY 100 HOURS SERVICE” on page 3-46.
Steering wheel is loose Play in steering cylinder pin Defective hydraulic system Lack of oil Grease bearing or replace pin and bushing where there is play Add oil to specified level. See “24.5 EVERY 100 HOURS SERVICE” on page 3-46.