SAFARI

BRAKES

Fig. 30 - Tandem Master Cylinder (Non ABS Type)

TANDEM MASTER CYLINDER

(Fig.6)

DESCRIPTION

The AS/AS tandem master cylinder consists of two

independent chambers in a single casting, housing

primary and secondary plungers fitted with gland seals

having minimum friction.

Each hydraulic system is so designed that any failure

of pressure seal in one of the systems would not result

in total failure of braking system, since the other

system remains completely operational and ensures

minimum safe braking performance.

The specific design feature of the master cylinder is

that pressure is developed in both the chambers

simultaneously without any time lag.

Under normal conditions when the brake pedal is

depressed, the servo output rod pushes the primary

plunger of the bore assembly. At the same time, the

force of the primary spring moves the secondary

plunger forward.

Simultaneously the recuperating pressure seals on

both the plungers cover the recuperating holes,

developing pressure simultaneously in both the

chambers.The pressurised fluid in the primary chamber

is transmitted to the rear brakes and from the

secondary chamber to the front brakes through the

adaptor.

The fluid reservoir comprises of two separate

chambers serving each systemwith a common topping

up connection at the upper portion. The reservoir

comprises of a fluid level warning indicator [FLWI].

FLUID RESER-

VOIR

'O'

RING

BACKSEAL

ASSY. PRIMARY PLUNGER

STOP

GLAND SEAL

ASSY. SECONDARY

PLUNGER

SPRING

SEAL

FILLER CAP