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5-8
1972 PONTIAC SERVICE MANUAL
Leaking Brake Line o r Connection
X
X
X
Leaking Wheel Cylinder o r Piston Seal
Leaking Master Cylinder
A i r I n Brake System
Contaminated o r Improper Brake F l u i d
Restricted A i r Passage
i n Power Head
Damaged Power Head
Improperly Assembled
Power Head Valvlnq
Worn Out Brake L i n i n g
-
Replace
Leaking Vacuum System
I
I
I X X I
1 x 1
I
I
I
I
I
I
I
I
I
X
X
X X
Uneven Brake L i n i n g Wear
-
Replace and Correct
Faulty Automatic Adjusters
X
X
X
X
X
X
X
Glazed Brake L i n i n g
-
Sand Lightly
Incorrect L i n i n g Material
-
Replace
Contaminated Brake L i n i n g
-
Replace
Linings Damaged by
Abusive Use
-
Replace
Excessive Brake L i n i n g Dust
-
Remove w i t h A i r
Heat Spotted o r Scored
Brake D r u m s o r Rotors
Out-of-Round o r Vibrating
Brake D r u m s
Out-of-Parallel Brake Rotors
Excessive Rotor Run-Out
X
X X
1
l n c o r r e c t Wheel Bearina Adiustment
1
X
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1
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1
X
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X X
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Faulty Meterlng Valve (Disc O n l y )
Brake Pedal Llnkage
Interference or B i n d i n q
Improperly Adjusted Parking Brake
D r u m s Tapered or Threaded
I n c o r r e c t Front End Alignment
I n c o r r e c t Tire Pressure
Gnerator Riding Brake Pedal
X
X
X
X
*
X
X
XX
-
Indicates more probable cause(sl
X
-
Indicates causes
X
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x
Fig.
5-1
Brake System Diagnosis Chart
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,
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XX
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