430419 Removing and installing rear-axle valve block (PDCC)
WM 430419 Removing and installing rear-axle valve block (PDCC)
Preliminary work for rear-axle valve block
1. Remove rear underbody cover -> 519419 Removing and installing cover for rear underbody - section on "Removing" 519419 Removing and Installing Cover for Rear Underbody.
Removing rear-axle valve block
WARNING
Caustic fluids
- Danger of chemical burns
-> Avoid contact with caustic fluid.
-> Wear personal protective gear.
-> Ensure that there is good ventilation.
-> If you do come into contact, wash off immediately with plenty of warm water and contact a doctor if necessary.
NOTICE
Aggressive fluids
- Risk of damage to components and surfaces
-> Do not spill fluids.
-> In the event of contact, wash the component or surface with water.
-> Replace components that are already damaged.
Overview
Information
Before starting to work on the PDCC system, always clean the underbody or at least clean the system components you will be working on. Ensure absolute cleanliness at all times. In other words:
- Clean the system components to be removed using a power washer, for example. Ensure that the high-pressure spray is at least 50 cm away from the component (risk of damage to electric lines, connectors and contacts).
- Before loosening the hydraulic connections, the areas around the connections must also be cleaned carefully (e.g. using a brush and/or a lint-free cloth).
- If you intend to use the component again, the openings must be sealed immediately with suitable stoppers.
- If you are using new components, the stoppers must only be removed immediately before fitting.
1. Detach exhaust system rear section -> 260119 Removing and installing exhaust system - section on "Removing" Service and Repair.
Detaching rear section of exhaust system
1.1. Loosen clamps -1- and push them to the rear.
1.2. Unscrew fastening screws for brackets -2-.
1.3. Remove transverse strut -3-.
1.4. Unscrew fastening screws for brackets -4-.
2. Support rear section of exhaust system using transmission jack -1- and have it secured by a 2nd mechanic.
Transmission jack securing exhaust system
3. Unscrew fastening screw for protective plate -1- and remove protective plate.
Fastening screws, left
4. Unscrew top left fastening screw -2- and bottom fastening screw -3-.
5. Unscrew top right fastening screw -1-.
Fastening screws, right
6. Tilt valve block -2- to the rear in order to access the cap screws for the oil pressure lines.
7. Unscrew cap screws for oil pressure lines -1-.
Support connector
8. Unscrew fastening screws for support -2-.
9. Disconnect electric plug connections -3-.
10. Remove support -4-.
11. Mark the installation position of the steel flexi-pipes -2- on the steel flexi-pipes themselves and on the valve block using a suitable paint marker -3-.
Steel flexi-pipes
12. Unscrew cap screws on steel flexi-pipes -1-.
13. Pull steel flexi-pipes out of valve block.
Information
- After removing the lines, they must be closed off immediately using a clean cap if you do not intend to install the new valve block straightaway.
- When doing this, make sure that no dirt gets into the system as this can result in system failure.
14. Remove valve block.
Installing rear-axle valve block
NOTICE
Incorrect line routing
- Risk of damage to lines and hoses
- Malfunction and fault memory entry on control unit
-> Avoid small bending radii when routing lines.
-> File down edges and burrs in the routing area or mask them with adhesive tape.
-> Maintain a sufficient distance from components exposed to high temperatures while driving.
1. The rear-axle valve block is installed in reverse order to removal.
2. The tightening torques must be observed during installation: -> 4X00IN Tightening torques for levelling system [1][2]Specifications
Subsequent work
Information
Check the position of the steel flexi-pipes again following installation. Make sure that:
- The lines are not installed twisted (markings!)
- The lines are not exposed to any mechanical strain from the outside while driving, i.e. they must not be over-strained or deformed.
- The lines are not rubbing against other moving components.
- The lines cannot become clamped.
1. Install rear underbody cover -> 519419 Removing and installing cover for rear underbody - section on "Installing" 519419 Removing and Installing Cover for Rear Underbody.
2. Bleed PDCC -> 430307 Bleeding Porsche Dynamic Chassis Control (PDCC) 430307 Bleeding Porsche Dynamic Chassis Control (PDCC).