300tdi Defender Brake Question

[dickyjoe]

Hi all

Just wondering if the 300tdi Defender master cylinder (four wheel disk brakes) has a builtin brake bias valve or does it run a seperate unit?

Rich

[jimbo110]

A Defender 90 has a separate one, a 110/130 has none at all. The big 4 piston front callipers probably make up for it.

From the manual:

On 90 models a pressure reducing valve (PRV), fitted
to the RH bulkhead in the engine compartment,
maintains the braking balance, see J6322. Pressure
to the rear calipers is regulated by the PRV, this valve
is of the failure by-pass type, allowing full system
pressure to the rear brake calipers in the event of a
front (secondary) circuit failure.

NOTE: In some countries, a pressure
reducing valve may be fitted to 110 models

to conform to legal requirements.