Replacing Bearings For Carrier
Replacing bearings for carrierTools
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 program >> 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 (approximately 20 seconds).
2. Lift the vehicle.
3. Remove underbody protection.
General warning notes
Warning notes for ORS
WARNING:
Risk of accidents! The Offroad Stabilizer System (ORS) operates at an overpressure of up to 165 bar. Under certain conditions, motions can occur on the wheel carrier (e.g. if the Offroad stabilizers are disengaged when lifting, the button is pressed on the center console, and the wheel carrier is also raised). The stabilizer can close quickly.
^ Danger of crushing in the area of the stabilizers and wheel carriers. Risk of injury and material damage due to raising the wheel carrier incorrectly.
^ 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 program >> 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 (approximately 20 seconds).
ATTENTION:
Danger of injury due to falling tools.
^ Danger of crushing and deformation
^ Always use industrial footwear, goggles and protective gloves.
Tools and materials
Tool overview for suspension subframe bearings assembly fixture T10301
Counter support, 0 - 40 mm NR.106
Internal puller NR.108
Separating device, 12 - 115 mm [diameter] NR.111
Replacing bearings for carrier, front FA
Note: 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).
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.
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.
Note: Hold the hydraulic cylinder VAS 6178 tightly while pressing it out.
6. Attach the tools as shown in the illustration and press out the bearing.
Note: 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.
8. Press in suspension subframe bearing. To avoid damaging the bearing, the maximum Pressure: 10 kN ± 5 Sekunde 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.
9. Attach the tools as shown in the illustration and press in the bearing.
Note: 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
Note: 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.
3. Press out suspension subframe bearing.
4. Attach the tools as shown in the illustration and press out the bearing.
Note:
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.
5. Press in suspension subframe bearing. To avoid damaging the bearing, the maximum Pressure: 10 kN ± 5 Sekunde 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.
6. Connect the tools together as shown in the illustration.
Note: 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.