Hydraulic Pump Pressure Line: Installing Support (Holder)
Hydraulic pump pressure line: Installing support (holder)
Important information
Support (holder) on the pressure line
On the 911 Turbo and 911 GT3, the support at the plug-in coupling between the pressure line (pressure hose) -6- and pressure line -5- was changed. Instead of a retainer plate -7- (variant 1), a holder -1- with a spring band clamp -4- (variant 2) is installed. This change was introduced on 26 June 2007. On the 911 GT2, this holder -1- with the spring band clamp -4- has been used since the production launch.
If the plug-in coupling with the retainer plate -7- (variant 1/up to 26.06.2007) is opened, it can only be re-installed with the new holder -1- (variant 2)! The screw (with internal Torx screw T40) -2- must also be used.
Before opening the variant 1 plug-in coupling (with retainer plate -7-), check the axial play at the plug-in coupling! If there is more than 3.5 mm of axial play, the pressure line at the body -6- and the pressure line at the engine -5- must be replaced!
There is no need to check the axial play on variant 2 with the holder -1- (installed as standard since 26.06.2007)! There is also no need to replace the pressure lines -5 and 6-.
Plug-in coupling/pressure line support in the hydraulic pump area
Procedure if the holder (modified support/variant 2) is not installed
These instructions are only relevant if the connection point (between the plug-in coupling and pressure line) on variant 1 (support with retainer plate -7-) is opened.
Variant 1: Support with retainer plate -7-
Variant 2: Support with holder -1-
The plug-in coupling (pressure hose to pressure line) can only be accessed when the pressure hose -1- and air filter are removed on turbo engines.
Pressure hose and air filter
1. Check the axial play between the plug-in coupling and the inserted pressure line before opening the plug-in coupling on 911 Turbo and GT3 (997) vehicles on which the retainer plate (variant 1) is still fitted.
Checking axial play
1.1. Remove the lock at the plug-in coupling -between the arrows-.
1.2. Check the axial play in this area -between the arrows- using a suitable measuring device. Use a feeler gauge or the special tool star gauge Nr.127-1 Pos.1 for example.
1.3. Once you have checked the axial play (depending on the measured value), replace the relevant parts (Case 1 or Case 2).
Information about axial play
^ Depending on the design, there is generally approx. 3.2 mm of axial play -between the arrows- in the plug-in coupling.
^ If the plug-in coupling shows signs of wear, the axial play will be higher. The wear limit is 3.5 mm.
2. Depending on the amount of axial play on the plug-in coupling - up to 3.5 mm (case 1) or more than 3.5 mm (case 2), replace the following parts:
Removing retainer plate 7 (variant 1)
2.1. Case 1: Axial play less than wear limit (up to 3.5 mm)
Remove retainer plate -7- on variant 1.
Install rubber ring -3-, holder -1- with internal Torx screw T40 -2- and spring band clamp -4- (for securing pressure hose -6-).
Do not re-install previously fitted lock on plug-in coupling (in variant 1)!
Installing holder 1 (variant 2)
Installing holder 1 (variant 2)
2.2. Case 2: Axial play greater than wear limit (more than 3.5 mm)
Use the same procedure as for Case 1 (install holder -1- with the relevant parts, instead of the retainer plate).
Also replace the pressure line -5 and 6-.
Do not re-install previously fitted lock on plug-in coupling (in variant 1)!
The pressure line -6- runs above the transmission as far as the plug-in coupling at the connection point in the rear door sill area. To replace the pressure line -6-, the engine and transmission must be removed.
Installing holder (modified support) for pressure line
Opening plug-in coupling
1. Open plug-in coupling on the pressure line.
1.1. Remove the lock and then loosen (unscrew) the plug-in coupling. Turn the screw -9- while loosening the coupling. Counter at the hexagon on the plug-in coupling -10- when doing this.
1.2. Collect hydraulic fluid in a container.
1.3. Remove collar of holder and screw -9- from the pressure line.
2. Remove the retainer plate -7- after you have loosened the Torx screw -8-.
Removing retainer plate 7 (variant 1)
3. Fit plug-in coupling (screw it together). To do this, insert the collar of the holder and tighten the screw (tightening torque: 30 Nm/22 ftlb.). Counter at the lower hexagon on the plug-in coupling while tightening the screw.
Installing holder 1 (variant 2)
4. Install the new holder -1- and fit the pressure hose -6- at the plug-in coupling.
4.1. Slide rubber ring -3- onto the plug-in coupling.
4.2. Fit new holder -1-. Make sure that the rubber sleeve (on the short pressure line) is not damaged and is positioned correctly in the holder -1-.
4.3. Fit new fastening screw -2- with internal Torx screw T40 (instead of the old external Torx screw). Use a 1/4-inch socket-wrench insert (change-over ratchet with articulated piece and the required extension) when the engine is installed (for easier access).
4.4. Fit the spring band clamp -4- on the pressure hose -6- or on the holder -1-.
4.5. Fit the pressure hose -6- at the plug-in coupling (insert it until the plug-in part engages in the collar of the holder).
4.6. Position the spring band clamp -4- in such a way that it is touching the four stop lugs (on the holder -1-). It must also be easily accessible in case it needs to be opened at a later time. Lever/pull off the blue relief ring in this position so that the clamping force of the spring band clamp -4- takes effect.
5. Install the pressure hose -1- and air filter on the 911 Turbo.
Pressure hose and air filter
6. Fill the reservoir with Pentosin. Bleed the steering hydraulic system and check for leaks.