Porsche 928 Workshop Manual page 1252

Differential. Transaxle Svstem
928
I
4. With the System Taster switched off
(to ensure that only pilot pressure is
present at the measuring line),
remove pressure gauge complete
with connecting lines.
Install bleeder valve and bleed
transverse lock.
Correct reservoir fluid level.
5. Check lock hydraulics for leaks.
Disconnect System Tester.
Install rear brake caliper.
6. Fit rear left-hand wheel housing
inner panel. Fit rear wheels.
Take vehicle for a short test drive
(to check lock and brake operation).
Execution I Notes
- Open measuring line and transverse lock cylinder
carefully (observing pilot pressure). Remove
measuring line and fit bleeder valve.
- Bleed transverse lock using System Tester 9288,
with bleeding device connected to reservoir and
switched on (vent line clamped off).
Follow by correcting reservoir level (to a level
between MIN and MAX mark) with accumulator
fully charged.
Screw on reservoir lid, open vent line at reservoir
again,
- Check hydraulic lines for outside leaks, controlling
full system pressure at lock cylinder using System
a
Tester 9288.
- Then disconnect System Tester.
- Tighten brake caliper mounting bolts to
85 Nm (63 ftlb).
039 - 212
PSD-Diagnosis / Troubleshooting
l
Printed in Germany - XXVII, 1991