556719 Removing and Installing Hydraulic Unit For Rear Lid
WM 556719 Removing and installing hydraulic unit for rear lid
Technical values
Preliminary work
1. Remove side trim panel for rear luggage compartment. -> 700319 Removing and installing side trim panel for rear luggage compartment - section on "Removing" 700319 Removing and installing rear luggage compartment side-trim panel
Information
Only for vehicles with additional air conditioning.
2. Loosen additional air conditioning unit and swivel it to one side with the lines connected. -> 881019 Removing and installing additional air conditioning - section on "Removing" Service and Repair
Removing hydraulic unit for rear lid
Installation position of hydraulic unit for rear lid
1. Secure rear lid using the => WE1222 transmission and unit jack Junior Jack 0.5 to prevent it from accidentally falling shut.
Securing rear lid to prevent it from falling shut
Information
- Only for vehicles without auxiliary air conditioner.
Unscrew fastening screws -1- and remove package box -2- ( -arrow- ).
Removing package box
2. Release holder -2- at the two clips -arrows A- and remove rear lid control unit -1- out of the holder -2- ( -arrow B- ).
Removing rear lid control unit
3. Disconnect plug connection.
Disconnecting plug connection
3.1. Release plug connection -1- at the retaining clip -2- ( -arrow A- ) and push down and out -arrow B-.
3.2. Press locking tabs together -arrows C- and disconnect plug connection -1- ( -arrow D- ).
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.
4. Unclip water drain hose -1- and oil pressure lines -2 and 3- from the holders -4 and 5- ( -arrows- ).
Unclipping lines
5. Unscrew fastening nuts -2- and swivel out holder with the hydraulic unit -1- ( -arrow- ).
Swivelling out hydraulic unit holder
NOTICE
Incorrect handling of hydraulic system
- Malfunction in hydraulic system
- Risk of damage to hydraulic system
-> Do not disconnect plug-in couplings while opening or closing the rear lid.
-> Secure the lid mechanically to prevent it from closing before disconnecting plug-in couplings.
-> Do not short-circuit plug-in couplings.
-> Do not operate the system while plug-in couplings are disconnected.
-> Do not press actuating cylinder in or pull it out manually when the hydraulic unit is removed.
-> Protect hydraulic system from contamination.
6. Release plug-in couplings.
Releasing plug-in coupling (red)
6.1. Red oil pressure line: Press in clamp -1- ( -arrow A- ), release ( -arrow B- ) and pull out plug-in coupling -2- ( -arrow C- ).
6.2. Blue oil pressure line: Swivel oil pressure line -1- to the side slightly -arrow A-. Press in clamp -2- ( -arrow B- ), release ( -arrow C- ) and pull out plug-in coupling -3- ( -arrow D- ).
Releasing plug-in coupling (blue)
7. Remove holder with hydraulic unit from the vehicle.
8. Cut tie-wrap -1- and remove hydraulic unit -2- out of the holder -3- ( -arrow- ).
Removing hydraulic unit
9. Check rubber strips -1- in the marked area of the holder -2- , replace if necessary.
Inspecting rubber strips
10. Detach upper part of sound capsule -1- ( -arrow A- ) and remove hydraulic unit -2- ( -arrow B- ).
Removing hydraulic unit
Installing hydraulic unit for rear lid
Installation position of hydraulic unit for rear lid
CAUTION
Risk of damaging the oil pressure lines.
- Leaks and malfunction in the hydraulic system.
-> Do not bend, trap or crush oil pressure lines during installation.
-> Pay special attention when routing the oil pressure lines in the supports, noting the red and blue coloured rings.
-> Oil pressure lines must not cross.
Information
Two people are needed for steps 1 to 5.
1. Connect oil pressure lines -1 and 2- onto the hydraulic unit -3- ( -arrows- ) until the plug-in couplings -4- engage securely.
Connecting oil pressure lines
2. Push plug connection together -1- at the hydraulic unit -2- ( -arrows- ) until the plug connection -1- engages securely.
Connecting plug connection
3. Bleed the hydraulic system.
3.1. Hold the hydraulic unit horizontally while bleeding it.
3.2. Lower transmission jack slightly and push to the side.
3.3. Open and close the rear lid 2-3 times automatically.
The system has a self-bleeding feature. Several operations will bleed the system. After bleeding check the hydraulic oil level in the hydraulic unit's reservoir, correct if necessary. -> 556719 Removing and installing rear lid hydraulic unit - section on "Information"
4. Open the rear lid.
5. Place hydraulic unit -1- into the lower part of the sound capsule -2- , route wire harness -3- and position upper part of sound capsule -4- ( -arrow- ).
Installing hydraulic unit
Information
In order to prevent noises, the catch of the tie-wrap must be located on top of the sound capsule.
6. Insert sound capsule -1- with the hydraulic unit into the holder -2- ( -arrow- ) and secure loosely with a tie-wrap -3- so that the sound capsule is pressed together slightly.
Installing hydraulic unit
7. Position holder -1- with the hydraulic unit on the body -arrow- and screw down using the fastening nuts -2-. => Tightening torque: 9.7 Nm (7.0 ftlb.)
Installing holder
8. Clip plug connection -1- into the retaining clip -arrow-.
Clipping in the plug connection
Information
When routing the oil pressure lines, ensure that the oil pressure lines lie against the edge in the area of the piping -6- or rubber strips -7-.
9. Secure lines.
Securing lines
9.1. Clip oil pressure lines -2 and 3- flush (colour marking) into the holders -4- ( -arrows A- ).
9.2. Clip water drain hose -1- into the holder -5- ( -arrow B- ).
10. Insert rear lid control unit -1- into the holder -2- from below and press in -arrow A- until the two clips engage securely -arrows B-.
Installing rear lid control unit
Information
- Only for vehicles without auxiliary air conditioner.
Position package box -2- on the body -arrow- and secure with the fastening screws -1-.
Installing package box
General information on the hydraulic unit
Checking hydraulic oil level
1. Hold hydraulic unit horizontally and check hydraulic oil level at the reservoir using the cross hairs marking.
The hydraulic oil level must not drop below the minimum mark.
Checking hydraulic oil level
2. A hydraulic oil level that is too low must be adjusted accordingly.
Filling hydraulic unit
Information
- When filling the hydraulic system, proceed with utmost care to ensure dirt does not get into the system.
- Before unscrewing the screw plug, place a cloth underneath the hydraulic unit to catch emerging hydraulic oil.
- The hydraulic unit for the rear lid uses a closed hydraulic system. In general, the hydraulic system will need to be filled only if the hydraulic circuit was opened (after parts replacement). Only Genuine Porsche hydraulic oil must be used when changing or topping up the hydraulic oil.
1. Fill hydraulic unit.
Filling system
1.1. Unscrew screw plug -1-.
1.2. Fill hydraulic unit -2- as far as the cross hair marking with Genuine Porsche hydraulic oil -3-.
Information
When screwing in the screw plug -1-, ensure that the seal -4- is touching the screw head.
1.3. Screw in screw plug -1-. => Tightening torque: 1 Nm (0.5 ftlb.)+/-0.3 Nm (+/-0.2 ftlb.)
Replacing plug-in couplings
Removing plug-in couplings
1. Remove hydraulic unit. -> 556719 Removing and installing rear lid hydraulic unit - section on "Removing"
Information
- When replacing the plug-in coupling, proceed with utmost care to ensure dirt does not get into the system.
- Before unscrewing the plug-in coupling, place a cloth underneath the hydraulic unit to catch emerging hydraulic oil.
2. Remove plug-in coupling at the hydraulic unit.
Removing plug-in coupling at hydraulic unit
2.1. Counter plug-in coupling connection -1- with a suitable wrench and unscrew plug-in coupling -1- in -direction of arrow A-.
2.2. Counter plug-in coupling connection -3- with a suitable wrench and unscrew plug-in coupling -4- in -direction of arrow B-.
3. Remove plug-in coupling at the oil pressure line.
Removing plug-in coupling at oil pressure line
3.1. Counter plug-in coupling connection -1- with a suitable wrench and unscrew plug-in coupling -2- in -direction of arrow A-.
3.2. Counter plug-in coupling connection -3- with a suitable wrench and unscrew plug-in coupling -4- in -direction of arrow B-.
Installing plug-in couplings
1. Install plug-in coupling at the oil pressure line.
Installing plug-in coupling at the oil pressure line
1.1. Red oil pressure line: Counter plug-in coupling connection -3- with a suitable wrench and screw in plug-in coupling -4- in -direction of arrow A-.
1.2. Blue oil pressure line: Counter plug-in coupling connection -1- with a suitable wrench and screw in plug-in coupling -2- in -direction of arrow B-.
2. Install plug-in coupling at the hydraulic unit.
Installing plug-in coupling at hydraulic unit
2.1. Red oil pressure line: Counter plug-in coupling connection -3- with a suitable wrench and screw in plug-in coupling -4- in -direction of arrow B-.
2.2. Blue oil pressure line: Counter plug-in coupling connection -1- with a suitable wrench and screw in plug-in coupling -2- in -direction of arrow A-.
3. Install hydraulic unit. -> 556719 Removing and installing rear lid hydraulic unit - section on "Installing"
Subsequent Work
Information
Only for vehicles with additional air conditioning.
1. Secure additional air conditioning unit. -> 881019 Removing and installing additional air conditioning - section on "Installing" Service and Repair
2. Install side trim panel for rear luggage compartment. -> 700319 Removing and installing side trim panel for rear luggage compartment - section on "Installing" 700319 Removing and installing rear luggage compartment side-trim panel