Porsche 1972 911 Workshop Manual page 539

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G E N E R A L D A T A
I t e m
T a n d e m B r a k e M a s t e r C y l i n d e r
Bore
Stroke
Reduction ratio a t brake pedal
Clearance, actuating rod t o piston
F r o n t W h e e l B r a k e s
Brake disc outer diameter
Thickness, new
Minimum thickness when reconditioned
Thickness tolerance
Brake disc lateral runout
Lateral runout when installed
Caliper piston
Brake lining rhickness
Lining t o rotor clearance when released
Lining area per wheel: Type 9 1 1 T and E
R e a r W h e e l B r a k e s
Brake disc outer diameter
Thickness, new
Minimum thickness when reconditioned
Thickness tolerance
Brake disc lateral runout
Lateral runout when installed
Disc surface finish when reconditioned
Caliper piston
Lining thickness
Lining to rotor clearance when released
Lining area per wheel
*The disc must always be machined on both sides by the same amount.
t h r o u g h 1 9 7 7 m o d e l
*
Type 9 1 1
S
*
T e c h n i c a l D a t a
D i m e n s i o n s a n d
A d j u s t m e n t V a l u e s
282.5 m m , vented
20.0 m m resp. 2 0 , s m m
18.6 m m
max. 0.03 m m
max. 0.05 m m
0.2 m m
48 m m
1 0 m m
0 . 2 m m
2
52.5 c m
2
mm,
290 vented
20.0 m m
18.6 m m
max. 0.03 m m
max. 0.05 mm
max. 0.2 m m
max. 0.006 m m
38 m m
1 0 mm
0.2 mm
2
52.5 c m
6
W e a r
T o l e r a n c e s