4C –2 POWER BOOSTER
DAEWOO M-150 BL2
DESCRIPTION AND OPERATION
POWER BOOSTER
This booster is a single diaphragm, vacuum-suspended
unit. In a normal operating mode, with the service brakes
in the release position, a vacuum-suspended booster
operates with a vacuum on both sides of its diaphragm.
When the brakes are applied, air at atmospheric pres-
sure is admitted to one side of the diaphragm to pro-
vide the power assist. When the brakes are released, at-
mospheric air is shut off from that side of the diaphragm.
The air is then drawn from the booster through the vacu-
um check valve by the vacuum source.
Important: If any hydraulic component is removed or
disconnected, it may be necessary to bleed all or part of
the brake system.
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