TM 1-1500-204-23-2
Table 4-41. Troubleshooting Wheel Brake Systems - CONT
Trouble
Probable Cause
Remedy
Pedals bottom, no brakes
Broken or leaking brake line.
Replace damaged line and bleed
system
Master cylinder or power brake
Replace master cylinder or power
control valve defective
brake control valve and bleed
system.
Excessively worn brake linings.
Replace brake linings.
Air In system.
Bleed brakes
Solid pedal and no brakes
Too little fluid in system
Replenish supply and bleed brakes.
Excessively worn brake linings or
Replace brake linings
grease on brake linings.
Spongy brakes
Air In system
Bleed brakes.
Low hydraulic fluid level
Replenish supply
Unable to hold pressure
Leak In brake system
Visually check entire system for
evidence of leaks.
Master cylinder or power brake
Replace master cylinder or power
control valve defective
brake control valve and bleed
system
Uneven braking
Worn brake linings.
Replace brake linings.
Worn brake disc.
Replace brake disc.
Air in system
Bleed system.
Leaking line connection.
Tighten connection and bleed
system.
Worn or damaged pressure relief
Replace pressure relief valve and
valve
bleed system
Weak braking
Air in system.
Bleed system
Master cylinder or power brake
Replace master cylinder or power
control valve defective.
brake control valve and bleed
system
Insufficient supply of hydraulic
Replenish supply
fluid.
4-155
