Front Suspension
WM 401155 Replacing bearings for carrier
Preliminary work
1. Switch off level adjustment.
On vehicles with ORS, depressurize the system using the PIWIS Tester.
- Before working on the vehicle, ensure that the ORS is engaged. The indicator light on the center console button must be OFF. If the indicator light is on, follow the following procedure: Switch on the ignition and engage the road driving programme ] High Range [. The anti-roll bars must engage audibly.
- Before working on the ORS, always depressurize the system! To do this, close the PIWIS Tester and select ] Offroad Stabi (ORS) ] Drive links ] Clock FA valve or RA valve [. The valve clocks (audibly) until the procedure is finished (approx. 20 seconds).
2. Lift the vehicle.
3. Remove underbody protection.
Tools and materials
Tools
Tool overview for chassis subframe bearings assembly fixture T10301
Tool overview for chassis subframe bearings
-A- - - Hydraulic cylinder VAS 6178 (The hydraulic cylinder is used together with the - foot pump VAS 6179 and the - pressure gauge with connecting cable VAS 617911 -B-.)
-1- - Threaded rod (Inserted into the tubular piston cylinder -A-.)
-2- - Threaded nut (Screwed onto the threaded rod -1-.)
-3- - Pipe (For pressing out the chassis subframe bearings.)
-4- - Ring (For pressing out the chassis subframe bearings.)
-5- - Press-out plate (For pressing out the chassis subframe bearings.)
-6- - Pressure piece (For pressing in the chassis subframe bearings.)
-7- - Press-in plate (For pressing in the chassis subframe bearings.)
-8- - Ring (For pressing out the chassis subframe bearings.)
-9- - Spacer sleeve (For pressing out the chassis subframe bearings together with pipe -3-.)
-10- - Pressure piece (For pressing in the chassis subframe bearings.)
-11- - Spacer sleeve (For pressing in the chassis subframe bearings.)
Porsche supplement set T10301/20
Assembly fixture T10301120
-2- - Threaded nut (Screwed onto the threaded rod -1-
-12- - Press-out ring (For pressing out the chassis subframe bearings.)
-13- - Pressure piece (For pressing in the chassis subframe bearings.)
-14- - Bush (For pressing out the chassis subframe bearings.)
Counter support, 0 - 40 mm NR.106
Internal puller NR.108
Separating device, 12 - 115 mm [diameter] NR.111
Replacing
Replacing bearings for carrier, front FA
Information
If a suspension subframe bearing is replaced, the other bearings must also be checked for cracks or other signs of damage.
1. Loosen the anti-roll bar from the connecting link on both sides. (Do not loosen the anti-roll bar for the rear front-axle bearings!)
2. Move the gear support under the engine transverse bar and lift it slightly using a suitable base (e.g. hard rubber support). (The gear support is not needed for the rear front-axle bearings).
Positioning the lift
3. Engage the spindle at the eyelet on the engine transverse bar at the side where you want to replace the bearing. Guide the spindle through the lower trailing arm and tighten the spindle slightly so that the spindle is slightly tensioned.
Fitting the spindle
4. Loosen the suspension subframe bearing on both sides, carefully lower the gear support (loosen the spindle carefully at the same time) until you get the clearance needed for using the press-out tool.
5. Press out suspension subframe bearing.
Tools for pressing out front-axle bearings at the front
Information
Hold the hydraulic cylinder VAS 6178 tightly while pressing it out.
Pressing out front-axle bearing at the front
6. Attach the tools as shown in the illustration and press out the bearing.
Information
When replacing bearings, please make sure that one arrow is pointing in the direction of travel while the other arrow is pointing away from the direction of travel.
7. Fit suspension subframe bearing and pay attention to installation position.
Marking on suspension subframe bearing
Tools for pressing in front-axle bearings at the front
8. Press in suspension subframe bearing. To avoid damaging the bearing, the maximum - Pressure: 10 kN±5 Second must not be exceeded at the stop (10 KN = 350 bar). This conversion applies only to the hydraulic cylinder VAS 6178. The conversion depends on the diameter of the cylinder in question.
Pressing in front-axle bearing at the front
9. Attach the tools as shown in the illustration and press in the bearing.
Information
Observe correct tightening torques.
10. Carefully lift the suspension subframe until the installation position is reached. Fit threaded joint on suspension subframe bearing.
11. Mount anti-roll bar on the connecting link.
12. Remove the spindle.
Replacing bearings for carrier, rear FA
Information
If a suspension subframe bearing is replaced, the other bearings must also be checked for cracks or other signs of damage.
1. Engage the spindle at the eyelet on the engine transverse bar at the side where you want to replace the bearing. Guide the spindle through the lower trailing arm and tighten the spindle slightly so that the spindle is slightly tensioned.
2. Loosen the suspension subframe bearings on both sides. Loosen the spindle carefully until there is sufficient clearance for using the press-out tool.
Tools for pressing out front-axle bearings at the rear
3. Press out suspension subframe bearing.
Pressing out front-axle bearing at the rear
4. Attach the tools as shown in the illustration and press out the bearing.
Information
When replacing bearings, please make sure that one arrow is pointing in the direction of travel while the other arrow is pointing away from the direction of travel.
Fit suspension subframe bearing and pay attention to installation position.
Marking on suspension subframe bearing
Tools for pressing in front-axle bearings at the rear
5. Press in suspension subframe bearing. To avoid damaging the bearing, the maximum - Pressure: 10 kN±5 Seconds must not be exceeded at the stop (10 KN = 350 bar). This conversion applies only to the hydraulic cylinder VAS 6178. The conversion depends on the diameter of the cylinder in question.
Tools for pressing in front-axle bearings at the rear
6. Connect the tools together as shown in the illustration.
Information
Observe correct tightening torques.
7. Carefully lift the suspension subframe until the installation position is reached. Fit threaded joint on suspension subframe bearing.
8. Remove the spindle.
Subsequent work
1. Fit underbody protection.
2. Check running gear and adjust it if necessary.