
440 LIGHT AND HEAVY VEHICLE TECHNOLOGY
Hydraulic brake misbehaviour in service 25.9 BRAKE EFFICIENCY AND TESTING
Assuming that any misbehaviour of the braking system
is not being influenced by unequal tyre pressures, or
defective operation of the steering or the suspension
systems, a purely general guide to the possible faults
developed with hydraulic brakes is as follows:
Pedal travel excessive
Drum brakes need manual adjustment
Drum brakes' automatic adjusters seizing
Disc hubs too much end float
Discs running out-of-true
Distorted disc pad damping shims.
Pedal slowly sinks
External leakage from hydraulic system
Internal leakage past maste ...