NANO

502

BRAKE SYSTEM

WHEEL CYLINDER

Working of wheel cylinder is as follows:

Wheel cylinders in the brake system are meant to

push the brake shoes against the brake drum. Each

wheel cylinder is provided with pistons, rubber seals,

springs and dust covers. The brake line from themaster

cylinder is attached to the inlet port and a bleeder

screw (with a cover) is provided to bleed air from the

system whenever required. Wheel cylinders are

mounted on back plate.

When the brakes are applied, the fluid under pressure

from themaster cylinder enters the inlet port and forces

the piston to move outward to push the shoe against

the drum. Similarly when the brakes are released the

brake shoe retractor springs force the brake fluid out

of the wheel cylinder by pushing the piston inward.

Inlet port

Spring

Piston

Dust Covers

Bleeder port

Rubber seal