300Tdi Defender Brake System Overview
BRAKES
1
DESCRIPTION AND OPERATION
DESCRIPTION
The mechanical components of the hydraulic braking
system consists of four piston caliper disc brakes at
the front and two piston caliper disc brakes at the rear.
Vented front brake discs are fitted as standard on
110/130 models, while 90 models have solid discs.
However, on 90 models with a heavy duty chassis,
vented front discs may also be fitted.
A cable controlled parking brake operates a single
drum brake mounted on the output shaft of the
transfer gearbox and is completely independent of the
main braking system.
The basic hydraulic system involves 2 separate and
independent primary and secondary circuits which
permits a degree of braking should a fault occur in
one of the circuits. The primary circuit operates the
rear brake calipers and the secondary circuit the front
brake calipers.
Master cylinder components
1. Secondary plunger
2. Secondary spring
3. Recuperation seal
4. Primary spring
5. Recuperation seal
6. Primary plunger
