4B –2 MASTER CYLINDER
DAEWOO M-150 BL2
DESCRIPTION AND OPERATION
MASTER CYLINDER
The master cylinder is designed for use in a direct–split
system. Front right brake and rear left brake are served
by the primary piston. Front left brake and rear right
brake are served by the secondary piston.
The master cylinder incorporates the functions of the
standard dual master cylinder, plus a low fluid level indi-
cator and the proportioning valve in the non–antilock
braking system.
The proportioning valves limit the outlet pressure to the
rear brakes after a predetermined master cylinder has
been reached.
Important:
D Replace all the components included in the repair kits
used to service this master cylinder.
D Lubricate rubber parts with clean brake fluid to ease
assembly.
D Do not use lubricated shop air on brake parts, as this
may damage rubber components.
D If any hydraulic component is removed or discon-
nected, it may be necessary to bleed all or part of the
brake system.
D The torque values specified are for dry, unlubricated
fasteners.
D Perform all service operations on a clean bench, free
from all traces of mineral oil.
PROPORTIONING VALVE
The proportioning valve limits the outlet pressure to the
rear brakes on the non-ABS after a predetermined mas-
ter cylinder pressure has been reached. This is used
when less rear apply force is needed to obtain optimum
braking and is usually found on disc/drum brake configu-
rations. On ABS-equipped vehicles, refer to Section 4F,
Antilock Brake System.
FLUID LEVEL SENSOR
Fluid level sensor is attached at the brake fluid reservoir.
This sensor will activate the BRAKE light if a low fluid
level condition is detected. Once the fluid level is cor-
rected, the BRAKE light will go out.
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