Checking Pilot Pressure Valves - Porsche 928 Workshop Manual

39
Differential, Transaxle System 928
Checking pilot pressure valves
Procedure
1. Prepare vehicle for pilot pressure
valve check.
Operations:
- Connect pressure gauge to lock
slave cylinder.
Connect System Tester 9288 to
diagnosis socket.
- Bleed pressure gauge.
Execution 1 Notes
- Connect ring flange (No. 3) to measuring line
(No. 2). Proceed by fitting this assembly complete
with banjo bolt, seals and fitting (Nos. 4, 5 and 6),
to the lock cylinder, replacing the bleeding valve.
Connect high-pressure measuring line (No. 2) to
pressure gauge.
Important note
Tigthen Nos. 4 and 6 carefully and lock when
tightening, making sure the parts do not bind.
If this is not observed, the fitting (No. 6) may
shear off.
D39 - 216
PSD-Diagnosis / Troubleshooting
a
Printed in Germany . XXVII, 1991