Porsche 928 - WORKSHOP MANUAL 1977 Workshop Manual page 207

46
Brakes/Mechanical Parts
928
ADJUSTING BRAKE PRESSURE ROD
86 Models Onward
(without stop on brake-pedal arm)
Note:
It is only necessary to adjust the
brake pressure rod if:
- the brake booster is replaced
- brake pressure rod adapter has
been removed.
- the pressure rod or the adapter
has been turned away from its
original position.
The brake-pedal arm does not have a
stop. The arm is in its initial
position when brake unit (brake
booster + brake master cylinder) is
in its released position. Since the
brake pedal is unsupported in its
initial position when the brake
pressure rod is correctly adjusted,
the permanently set clearances in
the brake booster are assured. When
the brakes have been bled and with
the engine switched off, a
pressure-rod play of approx. 10 mm
can be felt at the brake-pedal
plate when the pedal is depressed
by hand.
Adjusting
l.Adjust length of brake pressure
rod by turning adapter or
pressure rod. Length a must be
158 + 2 mm measured from the
bearing face of the brake booster
on the body to the center of the
adapter pivot pin.
Note:
If the car has manual transmission
and the brake pedal is more than
8 mm lower than the clutch pedal,
correct position of brake pedal by
turning pressure rod.
2.Tighten locknut.
3.Check setting of stoplamp switch
(page 46 - lOa).
46 - 10
Adjusting Brake Pressure Rod
(86 Models Onward)
Printed in Germany