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1949 Delco Brakes Service Manual (Courtesy of Pat Gizz) |
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DELCO
HYDRAULIC BRAKE MASTER CYLINDERS AND WHEEL
CYLINDERS |
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Fig. 2—Delco Hydraulic Brake Master
Cylinder |
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GENERAL DESCRIPTION AND
OPERATION
Delco Hydraulic Brake Controls
manufactured by Moraine Products Division consist of a master
cylinder in which hydraulic pressure is originated and wheel
cylinders that move the brake shoes and linings outward against
each brake drum. (See Figure 1). A
reservoir in the master cylinder maintains the operating fluid at a
constant volume. The Delco Hydraulic Brake system is
self-equalizing—meaning that
there can be no braking pressure applied to any one brake drum
until all brake linings are in contact
with their respective drums. Therefore, Delco Hydraulic Brake
Controls are not subject to
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individual adjustment except for
the wear of brake lining, drums, etc.
The master cylinder is fitted
with a piston, and the wheel cylinders are each fitted with opposed
pistons. All of these pistons are provided with rubber cup packings
which act as a seal to maintain pressure, prevent loss of brake fluid, and
prevent entry of air into the system. (See Figures 2 and 9.) The brake
pedal, when depressed, moves the piston within the master cylinder, thus displacing
the brake fluid from the master cylinder and forcing it through the
"line" into the four wheel cylinders. (See Figures 1 and
3B.) |
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Fig. 3A—Delco Hydraulic Brake
Master Cylinder in Operation |
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Fig. 3B—Delco Hydraulic Brake
Master Cylinder in Operation |
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