TSB : Wheel Bearing Housing

Details

Wheel Bearing Housing • Two different wheel bearing housings were installed in production; the difference between the two is the steering arm strength. Refer to the Electronic Parts Catalog (ETKA). • When exchanging the wheel bearing housing, make sure the length of the thread on the tie rod end is sufficient (there must be approximately 5 mm extra thread). If this is not the case, then install a new tie rod end with a longer thread pin. Refer to the Electronic Parts Catalog (ETKA). • Distinguishing characteristic, refer to => [ Wheel Bearing Housing with Different Steering Arm Thickness ] Removal and Replacement . Special tools, testers and auxiliary items required • Torque wrench (V.A.G 1331) • Torque wrench (V.A.G 1332) • Ring Spanner Insert VAG 1332/10 (V.A.G 1332/10) • Ring spanner insert (V.A.G 1332/7) Removing - Loosen the connection between the drive axle and wheel hub . Refer to => [ Threaded Connection Between Drive Axle and Wheel Hub, Loosening and Tightening ] Description and Operation . - Remove the control arm. Refer to => [ Track Control Arm ] Track Control Arm . - Remove brake line and electrical line bracket from wheel bearing housing. - Remove the front wheel speed sensor. - Remove brake caliper and secure to body so weight of caliper does not stress or damage brake hose or brake line. - Remove disc brake. - Remove the bolts - arrows - and remove the brake shield - 1 -. - Remove the nut from the guide link joint pins enough so it is flush with the joint pin threads. Counterhold when loosening. To protect thread, screw nut on pin a few turns. - Press linkage stub of guide control arm off conical seating using (T40010 A). - Remove the bolt - 1 -. - Remove booth joint pins in the upper control arm - 2 - from the wheel bearing housing. The slits in the wheel bearing housing must not be widened using a chisel or similar tool! - Loosen the wheel bearing housing from the drive axle splines and remove it. • The drive axle must not hang down, otherwise the inner joint will be damaged by overflexing. • Secure drive axle to body using wire. Installing Install in reverse order of removal. Note the following: Tightening specifications, refer to=> [ Wheel Bearing Housing and Wheel Bearing Unit Overview ] Removal and Replacement . - Slide the wheel bearing housing onto the drive axle splines. - Insert both of upper control arm joint pins - 2 - in the wheel bearing housing and insert the bolt - 1 -. - Remove the adhesive residue on the ball joint and guide link stub threads. - Install the guide link on the wheel bearing housing and tighten. - Install the control arm. Refer to => [ Track Control Arm ] Track Control Arm . - Attach the tie rod end to the wheel bearing housing. Refer to => [ Tie Rods ] Tie Rods . • Push the upper control arms down as far as possible while tightening the bolts! - Tighten the threaded connection - 1 -. - Install the brake disc and caliper. - Tighten the drive axle to wheel hub threaded connection. Refer to => [ Threaded Connection Between Drive Axle and Wheel Hub, Loosening and Tightening ] Description and Operation . - On vehicles with automatic headlamp range control system, perform a basic setting on the headlamps. - If the vehicle level sensor was removed and installed on a vehicle with electronically controlled damping or if the linkage was loosened, the control position must be reprogrammed. Refer to => [ Control Position, Programming using Vehicle Diagnostic Tester ] Testing and Inspection . - If the control position was reprogrammed on vehicles with lane assist, the directional stabilization assistance control module (J759) must be recalibrated. Refer to => [ Lane Assist Calibration Procedure ] Lane Assist Calibration Procedure . - Tighten wheel. - Axle alignment is required, see Table. Refer to => [ Wheel Alignment ] Wheel Alignment .