Porsche 911 Carrera Technical Manual page 96

911 Carrera 4 (996)
Final drive -Differential, differential lock
39 60 01
Checking function of installed viscous clutch
2000
1
1500
r:;;;;
'
. --
~
~
-
~ 1000
m
-
500
0
1
2
3
4
5 6
7 8 9
A (km/h)
191_98
A = Ground speed of the front axle in kilometres/hour
B = Traction of the front wheels in (N)
Testing conditions:
Test only with viscous clutch at room
temperature
1. Connect Porsche System Tester 2 and
select "Actual values" menu (ABS speed).
Test duration max. 45 seconds (determine
measured value after 20 seconds)
2. Drive front wheels of the vehicle onto
the roller brake tester.
Repeat measurement after viscous
clutch has cooled down for one hour
3. Switch the engine off, set the hand brake
and shift the transmission to neutral.
39 60 01 Checking function of installed viscous clutch
Printed in Germany -14, 1998 C4S39117
39 -117