LR3/Disco 3
The brake cables consist of Bowden cables installed between the parking brake module and the drum brakes. Nuts, on
the ends of the outer cables, secure the brake cables to the parking brake module and the backplate of the related drum
brake. In each drum brake, the inner cable is located in the guide spring and connected to the brake shoe operating lever
by a nipple on the end of the cable. In the parking brake module, the two inner cables are joined together via the force
sensor and the spline shaft.
The inner cable of the RH brake cable is connected to a nipple on the force sensor by a 'shoe' on the end of the cable; a
locking cover keeps the shoe engaged with the nipple.
The inner cable of the LH brake cable is connected to the spline shaft by a threaded connector (LH thread); a squared
flange at the end of the threaded connector locates in the housing of the parking brake module, to prevent the threaded
connector from turning with the spline shaft.
When the spline shaft turns, the threaded connector of the LH brake cable is screwed into or out of the spline shaft, which
changes the effective length of the inner cables and operates the drum brakes. The ability of the spline shaft to move
axially in the gearbox equalizes the load applied by the inner cables to the two drum brakes.
Prior to disconnecting a brake cable, power should be disconnected from the parking brake module. Operation of the
parking brake switch while a brake cable is disconnected can cause the actuating mechanism in the parking brake
module to seize. In addition, the parking brake may not switch off until 20 minutes after key-off. Automatic re-apply cannot
be eliminated until this period has expired.
EMERGENCY RELEASE CABLE
8
Shoe
9
Locking cover
10
Sealing collar
11
Cable nut
