MG MG6 Series 2011 Service Manual page 617

Brake
Rear Brakes
The rear brakes each comprise of a hubmounted, single piston,
sliding calliper assembly and a ventilated disc.
The centre of each disc incorporates a drum for the parking
brake.
The inboard side of the disc is protected by a shield integral
with the back plate of the parking brake.
On the LH brake, a pad wear sensor is connected to the
inboard brake pad and wired in series with the front brake
pad wear sensor.
The connector of the sensor lead is located on the rear
subframe. When hydraulic pressure is supplied to the calliper,
the piston extends and forces the inner pad against the disc.
The calliper housing reacts and slides on the guide pins to bring
the outer pad into contact with the disc.
If the brake pads become sufficiently worn, the LH sensor
becomes open circuit and the instrument pack illuminates the
pad wear warning light.
Handbrake
The handbrake consists of drum brakes, integrated into the
rear discs of the main brakes, which are operated by cables
connected to a lever assembly between the front seats.
The lever assembly is mounted on the transmission tunnel.
A warning switch on the lever operates the brake warning
light in the instrument pack. While the handbrake is applied
the warning switch connects an earth to the instrument pack
which, if the ignition is on, illuminates the brake warning light.
Version 2.0
In some markets, the instrument pack performs a bulb check
of the brake warning light each time the ignition is switched on.
A front cable is connected between the lever assembly and
a cable tensioner, and two handbrake cables are connected
between the cable tensioner and the drum brakes.
Clips and a guide bracket secure the handbrake cables to the
underside of the vehicle, and grommets seal the handbrake
cables where they pass through the transmission tunnel.
The cable tensioner equalises the load applied by the
handbrake cables when the handbrake is applied.
The effective length of the cables can be adjusted by the
adjuster nut securing the front cable to the handbrake lever.
Each drum brake consists of a pair of brake shoes installed on
a backplate attached to the trailing arm of the rear suspension.
The shoes operate on the drum integrated into the rear brake
disc.
The shoes are separated by a manual adjuster and an expander,
and secured in position with retaining pins and return springs.
When the handbrake lever is applied, the movement is
transmitted by the handbrake cable to the expander, which
forces the shoes apart and into contact with the drum in the
rear brake disc.
Brake shoe to drum clearance is set manually using the adjuster
(there is no automatic adjustment).
Brake System
601