Locked Brake Pedal
by Miller | October 24, 2008 | In Troubleshoot Brake System | No Comments
HYDRAULIC BRAKE SYSTEM TROUBLE DIAGNOSIS AND CORRECTIONS #1
POSSIBLE CAUSES |
REMEDIES |
| 1) Swollen linings because the fluid used is inadequate or contaminated by kerosene, gasoline or mineral oil. | 1) Flush the system, replace all rubber parts, refill with new fluid and air bleed the lines. |
| 2) Plungers or valve carriers locked by deposits of fluid, foreign matter, etc.. | 2) Clean and bleed the system. |
| 3) Master cylinder compensating hole blanked because plunger clearance Is misadjusted. | 3) Adjust the rod-to—plunger clearance by setting to .0197″(0,5 mm). |
| 4) Clogged compensating hole. No compensation takes place. | 4) Disassemble and clean master cylinder. |
| 5) Seized master cylinder piston due to infiltrations of water through rear end because boot has failed or seals are no longer tight. | 5) Service the master cylinder, replace the plunger and the boot and/or seals, to prevent water infiltrations. |
| 6) Seized pedal shaft (this ls also the cause for hard pedal or locked brakes). | 6) Free and smoothen the parts and lubricate. |
