Hydraulic Brake Disc System; Master Cylinder - Vento Phantom R4i Service Maintenance Manual

HYDRAULIC BRAKE DISC SYSTEM

Hydraulic brakes operating principle:
It is operating on the principle that the liquid is not
compressible, so the force and motion can be transmitted
Through a liquid media.

MASTER CYLINDER:

As the brake lever is pressed, the master cylinder piston
moves forward, as it crosses the inlet port the piston starts
pressurizing the brake fluid in the master cylinder. The
pressurized brake fluid gets transferred to the caliper
through the brake hose.
As the brake lever released, the piston return spring
forces the piston to return to its original position. As the
brake fluid from the caliper returns slowly, a negative
pressure is being created between the secondary and
primary brake seals. This causes the collapse of the primary
brake seal, which in turns allows brake fluid to flow to master
cylinder through compensating port to counter the negative
pressure. As the brake fluid returns from the caliper, the
excess amount of brake fluid drawn from master cylinder.
VENTO MOTORCYCLES
Rev no.01/ page 64of 84