The pedal box houses the brake and clutch pedals on a shared pivot, with each pedal operating its own master cylinder via a pushrod. The pedal box specification changed across the production run, and the correct replacement components depend on the gearbox type, brake circuit configuration, and bumper type.
Pedal Box Variations
Three distinct pedal box specifications exist. The earliest type covers 3-synchro gearbox cars from 1962 to 1967, using brake and clutch pedals with a shield-shaped pad and vertical ribs. The 4-synchro single-circuit type covers Mark II cars from 1968 onwards, with revised pedal geometry to suit the new gearbox and master cylinder arrangement. The dual-circuit type, introduced for UK home market cars in May 1977, uses a different brake pedal and pedal box cover to accommodate the inline direct-acting servo.
Cars with automatic gearboxes used a wider rectangular brake pedal pad and did not have a clutch pedal, the pedal box and its internal spacers differ accordingly. The pedal box cover differs between chrome bumper and rubber bumper cars, the rubber bumper cover incorporates a threaded boss for the mechanical brake light switch.
Chrome bumper cars used a hydraulic brake light switch mounted elsewhere in the brake circuit.
Pedal Box Components
The pedal pivot bushes wear over time and should be inspected during any brake or clutch work, worn bushes produce lateral play in the pedals and can cause the master cylinder pushrods to operate at an angle, accelerating seal wear within the cylinders. Pedal box covers and cover seals, brake and clutch pedals, pedal rubbers, clevis pins and their washers and split pins, spacer tubes, distance tubes, and all associated fixings are available for single-circuit and dual-circuit specifications throughout the production run.