Opel Corsa B 1993–2000 Service and Repair Manual: General description

The footbrake operates on all four wheels.

On 2.0 litre GTE models disc brakes are fitted at both the front and rear, and on all other models, disc brakes are fitted at the front and self-adjusting drums at the rear. On all models, actuation is hydraulic with servo assistance.

The hydraulic system is split into two circuits, each circuit acting on one front and one diagonally opposite rear brake. In the event of rupture of the hydraulic system in one circuit, the remaining circuit will still function so that some braking capability remains. In such a case the pedal travel will increase and greater effort will be needed.

The hydraulic supply to the rear brakes is regulated so that the front brakes always lock first under heavy braking. On Hatchback models the regulation is by pressure-sensitive valves screwed into the master cylinder; on Estate and Van models the valve is load-sensitive and is located near the rear axle, by whose movement it is modulated.

The brake servo is of the direct-acting type, fitted between the pedal and the master cylinder. It is powered by vacuum developed in the inlet manifold. Should the servo fail, the brakes will still operate, but increased pedal pressure will be required.

The handbrake provides an independent mechanical means of rear brake application.

On 2.0 litre GTE models the handbrake operates a set of brake shoes, the shoes act on the brake drum which is incorporated inside the rear disc. On all other models, the handbrake provides a mechanical means of operating the brake shoes.

Depending on operating territory and equipment level, warning lights may be fitted to indicate low brake fluid level, handbrake application and brake pad wear. Sometimes one warning light has a dual function: refer to the owner's handbook for details.

Note: When servicing any part of the system, work carefully and methodically; also observe scrupulous cleanliness when overhauling any part of the hydraulic system. Always renew components (in axle sets, where applicable) if in doubt about their condition, and use only genuine Vauxhall/Opel replacement parts, or at least those of known good quality. Note the warnings given in `Safety first' and at relevant points in this Chapter concerning the dangers of asbestos dust and hydraulic fluid.