Range Rover P38
ABS
25
DESCRIPTION AND OPERATION
9. If master cylinder fails, i.e. there is insufficient
fluid in master cylinder to create pressure,
braking to all four wheels is retained and ABS
remains operative. The red warning light will be
illuminated if cause of the master cylinder failure
is a fluid leak and level in fluid reservoir is low
enough to actuate fluid level switch.
WARNING: LONGER PEDAL TRAVEL IS
REQUIRED, BUT POWER ASSISTED
BRAKING IS AVAILABLE AT REDUCED
EFFICIENCY.
10. If brake failure occurs due to a fractured brake
pipe between a servo cylinder and a wheel,
there may be no pressure in the master cylinder.
The fluid warning light will illuminate when level
in fluid reservoir is low enough to actuate fluid
level switch. Master cylinder and power valve will
operate as for master cylinder failure, BUT, fluid
from power circuit will push all moving parts in
servo cylinder associated with failure to limit of
travel. No pressurised fluid passes to the front
brake caliper served by the affected servo
cylinder, but pistons in rear calipers will be
supplied with direct pressure from power valve.
The front caliper served by the other servo
cylinder retain braking as fluid from master
cylinder is retained in servo cylinder not
associated with the leakage.
WARNING: BRAKE PEDAL TRAVEL WILL
BE GREATER AND EXTRA PEDAL
EFFORT WILL BE REQUIRED,
ACCOMPANIED BY THE VEHICLE PULLING TO
ONE SIDE.