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1949 Delco Brakes Service Manual (Courtesy of Pat Gizz) |
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DELCO BRAKE SERVICE MANUAL |
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wheel cylinder should be
inspected for similar conditions.
Before
reassembling the wheel cylinder, coat the bore and internal parts with Delco Brake
Fluid. Install wheel cylinder clamp and mount wheel cylinder on brake backing plate. Examine hose
for cracks or internal swelling
before connecting to wheel
cylinder and copper tubing. Replace any defective hose. Install connecting
links, attach retractor
springs, and remove clamp. (Replace old retractor springs if
distorted or broken.)
Motorists should be cautioned
about driving with the emergency brake on. This causes overheating of rear
brakes which in turn may cause the lips of the wheel cylinder cups to take a
set. |
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Fig. 10—Delco Hydraulic Brake
Wheel Cylinder Repair
Kit
If the
parts in one cylinder are badly worn or if the cylinder bore is beyond restoration,
the other |
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BLEEDING,
FLUSHING, AND RE-FILLING BRAKE
SYSTEM |
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INSTRUCTIONS for BLEEDING and
RE-FILLING
The correct order of bleeding is
left front, right front, left rear, right rear. Following this procedure
expels air from the lines and wheel
cylinders closest to the
master cylinder first. It eliminates the possibility of air in a
line close to the master cylinder
entering a line further away after it has been bled.
The safest procedure is to bleed
after the brake system has been completely re-assembled and the drums are
in place. If, for any reason the drums are not in place, be sure retractor
springs are attached and/or wheel cylinder clamp is used.
Bleeding of the hydraulic system
may be accomplished by either of two methods, namely—filler jar or
pressure tank. In either case, clean top of master cylinder carefully before removing
filler cap assembly. (See Figures 11A and 11B.)
(A) If
the filler jar method is used, remove bleeder screw in bleeder valve (See Figure
9) ; attach special bleeder
hose; place end of hose in container partially filled with fluid, making
sure the end of the hose is
below the level of the fluid; open |
bleeder valve about 3/4
turn; force fluid through by working brake pedal slowly; when bubbles
of air stop coming from bleeder hose, that particular cylinder and
line are bled. Tighten bleeder valve before removing bleeder hose;
replace bleeder screw. Repeat
operation on all cylinders. |
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Fig. 11A—Bleeding Delco Hydraulic Brake
System |
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8 |
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