Porsche 1972 911, Руководство по ремонту

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F r o n t A x l e
911
C H E C K I N G S E L F - L E V E L I N G H Y D R O P N E U M A T I C S U S P E N S I O N S T R U T S
S p e c i a l T o o l s :
P 301b Measuring Mandrel
1. Load the front axle with a ballast of 100 kp
(220 lbs) in such way that both wheels are
evenly weighted (distribute the load evenly in
the luggage compartment).
2. The best way to test the pumping action is by
driving the car.
Drive the car into level surface and push plug
gauges (special tool P
from within the
compartment of the reinforcing support mem-
Measure and note the distance from the ground to
ber, to the stop i n left and right transverse
the bottom edge of the fender across the front
support arm (grease the mandrels slightly to
wheel center on left and right side. Remove
provide some adhesion).
measuring mandrels (special tool P
N
o t e Before lowering the jack, measure the
distance from the wheel flange to the ground,
then measure again after lowering the jack to
determine the static deflection of the tires on
both sides of the car. The difference must b e
deducted from measurements obtained between
the ground and lower edge of fender.
Drive the car on relatively straight but rough
Measure distance "a"
-
from the ground verti-
road over a distance of approc. 2 km (1 1 / 4 miles),
to the front wheel center.
without hard braking, and stop car on a level sur-
face. Keeping car occupants in the car, have an-
Distance eguals distance "a" less 124 mm
other person make comparison measurements at
(5.0
in). Raise the car by the front center with
both front fenders. The values should not differ
a jack until distance is attained at the
from the determinal nominal values more than
measuring mandrels.
10 mm
(
13/32 in).