Porsche 928 - WORKSHOP MANUAL 1977 Workshop Manual page 172

928
Antiblock System
45
REMOVING AND INSTALLING HYDRAULIC UNIT
Removing
1. Turn off ignition and disconnect battery
ground wire on body.
2. Remove left intake hose on air cleaner,
loosen power steering supply tank on
bracket (hoses remain connected), pull off
ignition leads on ignition coil and take off
left front wheel.
3. Disconnect brake lines as well as brake
pressure regulator (no. 4 - 9) on hydraulic
unit.
This is done by uncliping brake lines in
holders on wheel housing (locks are
opened from above).
Insert plugs in open brake lines and
connections immediately (danger of dirt
entering system).
If plugs are not available for brake lines,
first drain tank and cover lines.
4 - From brake master cylinder,
front wheel circuit (code V)
5 - Brake line front left (code I)
6 - Brake line front right (code r)
7 - From brake master cylinder,
rear wheel circuit (code H)
8 - Brake pressure regulator
9 - Brake line rear (code h)
10 - Hydraulic unit console with spot-
welded bracket for power steering
supply tank
4. Remove wheel house cover.
5. Remove cover.
Printed in Germany - VI I I, 1984 Removing and Installing Hydraulic Unit 45 - 1