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2-2
GROUP S O B R A K E S
TROUBLE SYMPTOMS, CAUSES, AND CORRECTIONS (Continued)
TABLE 1
-Brake Trouble Symptoms aud Possible Causes
BOOSTER
PEDAL
(Continued)
BRAKES DRAG O R GRAB
SELF APPLICATION OF
BRAKES WHEN
ENGINE STARTS
Trouble Symptoms
-
a
Possible Causes of
Trouble Symptoms
not eliminate the trouble, remove the
would cause leaks. When assembling,
booster from the car. Separate the
be sure that the diaphragm assembly
front shell from the rear shell, and
is properly positioned. Improper loca-
check the valve and rod assembly
tion could cause leakage between
reaction disc, diaphragm plate, and
the vacuum and atmospheric sides
diaphragm assembly for damage that
of the diaphragm.
If the brakes still drag or grab
assembly. Remove and disassemble
after eliminating the causes listed in
the booster. Clean, inspect, and re-
Table 1, the condition is probably
place parts as necessary.
caused by a sticking valve plunger
Remove
and
disassemble
the
seated valve poppet. Clean, inspect,
booster. Check for a leak in the
and replace parts as necessary. Be
rear shell. Check the diaphragm for
sure that the diaphragm is properly
being out of locating radii in the
located when assembling.
housing. Check for a sticking or un-
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