Porsche 928 - WORKSHOP MANUAL 1977 Workshop Manual page 174

928
Antiblock System
45
Installing
1. Tilt down hydraulic unit bracket on
wheel side.
2. Move hydraulic unit into bracket from
wheel side and install two mounting
bolts (position of console as described in
point 1).
3. Mount hydraulic unit bracket on wheel
housing wall (three self-locking nuts).
4. Finish installation of hydraulic unit on
bracket. Tighten three mounting bolts.
5. Mount brake pressure regulator and brake
lines on hydraulic unit in correct position.
If applicable, hold brake lines in brackets
on wheel housing wall with clips and
engage locks.
Note:
Make sure brake lines are routed correctly.
6. Connect 12.pin plug and secure cable
release.
Mount cover on hydraulic unit.
7. Mount wire harness on hydraulic unit
bracket (loosen right bolt again).
Connect ground wire on pump motor.
8. Bleed brakes in order of stepped brake
master cylinder, push rod brake circuit
(front wheels) and intermediate piston
circuit (rear wheels) and check for leaks.
Bleeding procedures are same as for cars
without ABS.
9. Mount wheel house cover, front wheel,
power steering supply tank, ignition leads
on ignition coil and intake hose.
Connect battery ground wire.
10. Check operation with an A8S tester.
Printed in Germany - VI f I, 1984
Removing and Installing Hydraulic Unit 45 - 3