Measuring The Plate Wear On The Controlled-Slip Differential - Porsche 928 Workshop Manual

928
Differential, transaxle system
39
l
Check level in the reservoir. The fluid must be approx. I cm above the step in the reservoir body
or between the markings (with the pressure reservoir charged).
Measuring
the plate wear on the controlled-slip differential
Note
The wear dimension can be determined only
by means of the measuring cylinder - special
tool 9514.
1" Remove slave cylinder.
Note
In order to avoid venting of the lock system,
the pressure line at the slave cylinder must
not be disconnected when the transmission is
installed. In this case, unflange the slave cylin-
der with pressure line from the housing.
2. Back off the adjusting screw of the measu-
ring cylinder as far as possible (this faci-
litates assembly of the cylinder).
3. Mount the measuring cylinder on the trans-
mission and tighten the knurled nut.
Note
If the transmission is installed, it is recommen-
ded to use two studs M8 x 45 with continuous
thread to secure the measuring cylinder.
4. Screw in the adjusting screw on the measu-
ring cylinder until there is no longer any
adal play at the spacer tappet. Read off the
wear dimension in this position.
New dimension
Wear dimension
= 34.5 mm
= 45.0 mm
LS = Measuring range for longftudinal lock
911 Carrem 4
QS = Measuring range for transverse lock
928 S4,
m GT. 929 GTS and 911 Carrera 4
1 - Spacer tappet
2 - Adjusting screw
2a - Measuring groove on adjusting screw
3 - Knurled nut
Note
When the wear dimension has been reached,
the plates of the lock must be replaced. Do
not correct the wear dimension at the thrust
bearing under any circumstances.
l
PSD diagnosisrkoubleshooting
D39 - 202e
Printed in Gemnny -xXx& 1996