Main service brake

Braking system : Fig. I

Each front brake caliper has two pistons supplied by independent circuits.

The rear circuit from the master cylinder feeds the front brake upper pistons and the rear brakes.

The front circuit from the master cylinder feeds the front brake lower pistons.

MAIN SERVICE BRAKE

Disc brakes at the front :

GIRLING brakes of the floating caliper type with a wear take-up system (2 pistons per caliper).

Drum brakes at the rear :

GIRLING brakes with floating shoes and an automatic wear take-up system.

Hydraulically operated by a twin circuit master cylinder (I and H circuit pattern).

• Vacuum assistance system (brake servo)
• Brake pressure distributor on the rear brakes.

EMERGENCY BRAKE

Lever operated acting on the rear brakes through cables.

The vehicle must be immobilised at a brake lever travel of 4 to 5 notches.

M A S T E R - V A C type servo.

Vacuum source for servo :

On Diesel engines : exhauster connected to the brake servo by a pipe.

On petrol engines : a pipe passing from the inlet manifold to the brake servo.

Braking system (key) :

1. Front brake
2. Rear brake
3. Brake compensator
4. Vacuum servo
5. Master cylinder

Master cylinder

• Twin circuit type without a residual pressure valve.

Front braking system : master cylinder ø :

Master cylinder piston travels

NEVER unscrew screw 1 on the master cylinder body, Fig. II

This screw acts as a piston stop and any loosening and retightening of the screw could jam the piston cup washer if the spigot on the screw does not re-enter the groove (2) in the piston, Fig. III.

The brake fluid must fulfil the standard : N.F.R. 12640 S or ISO 4925 or SAE J1703 or FMV SS 116 DOT 3.

Braking system capacity … 0.7 litres