The fluid level in the brake master cylinder reservoir should be checked periodically and topped up if required. The master cylinder is located on the 'step' on the engine compartment bulkhead, adjacent to the clutch master cylinder. The brake master cylinder is the left-hand cylinder looking towards the rear of the car .
Several different types of master cylinder and fluid reservoir are employed, requiring different checking procedures. Where the reservoir is of the same type as for the clutch, the filler cap must be removed to check the fluid level. Some models have a translucent extension fitted to the filler aperture and the fluid level can be seen through the wall of the tube. Where a split braking system is used, the tandem master cylinder has a translucent reservoir with the level marked on the side .
In all cases, the filler cap should be wiped clean before unscrewing it to prevent the possibility of dirt entering the system. The fluid level must be maintained at the bottom of the filler neck, or up to the 'Fluid Level' mark on the translucent type reservoir.
Use only the specified type of hydraulic fluid for topping up - see Service Data for details. Before refitting the filler cap, check that the vent hole in the cap is clear of obstruction.
It should be noted that brake fluid will damage paintwork if allowed to come into contact with it. Any spilt fluid must be wiped (or washed off with cold water) from the affected area immediately.
On 1275 GT models, the fluid level in the reservoir Will drop slightly over a period of time as the disc caliper pistons move outwards to compensate for pad lining wear . this is normal. However, if the fluid level falls excessively, or requires frequent topping up, this indicates a leak in the hydraulic system and steps should be taken immediately to establish and deal with the cause.
The brake fluid should be changed completely every 18,000 miles or 18 months, whichever is sooner.
Brake Lines, Hoses and Cylinder Seals Periodically, all hydraulic pipes, hoses and unions should be checked visually for chafing, leaks and corrosion. Any component which is damaged or suspect should be renewed immediately. As preventive maintenance, at 36,000 miles, all fluid seals in the braking system should be renewed, and all flexible hoses examined thoroughly and renewed if necessary.
At the same time, the working surfaces of the cylinder bores and pistons should be examined and new parts fitted where necessary.
The procedures for renewing the seals in the various hydraulic components of the braking system are fully described under the appropriate headings in the BRAKES section.