Attention! To tighten the axle nut, a wrench with an adjustable torque of at least 220 Nm is required.
Removing
1. Loosen the axle shaft nut using a SW 30 Allen wrench.
Attention! At the same time, in order to avoid an accident, the car must be on wheels, the gear must be engaged, and the parking brake must be applied.
2. Mark with paint the position of the wheels in relation to the hub. Thanks to this, after removal, it will be possible to return the balanced wheel to its place. Loosen the wheel bolts while the vehicle is on the ground, then place the vehicle on stands at the rear and remove the rear wheels.
3. Unscrew the half shaft (37) from connecting flange (33). To do this, unscrew the bolts with an internal polyhedron (35) (wrench SW 10, e.g. HAZET 2751 or 990 SLg 10) and remove them together with lock washers (34).
Attention! Make sure the wrench fits correctly in the bolt heads. It is advisable to pre-clean the internal polyhedrons in the bolt heads.
4. Place a garage jack under the suspension arm, raise the arm until the axle shaft is approximately horizontal. Don't forget the wood spacer between the lever and the jack.
Attention! When lifting, be careful not to lift the vehicle off the stands.
5. Extend the axle shaft, then tilt it obliquely down.
Attention! Make sure that when removing the axle shaft, the shaft cover does not unscrew.
6. Remove the half shaft from the hub. If it is firmly seated, use an ordinary suitable tool to push it out of the flange.
7. Remove the axle shaft, check the rubber cuffs and cover for leaks and damage, repair if necessary.
Installation
1. Clean the surface between the flange and the axle shaft cover.
2. Insert the shaft into the hub.
3. Attach the shaft to the connecting flange.
4. Install new washers and new polyhedron socket bolts.
Attention! Lightly lubricate the threads and the contact surface of the bolts beforehand. Measure the thread diameter as the torque depends on this.
5. Tighten bolts with a diameter of 10 mm to 70 Nm in a crosswise manner, and bolts with a diameter of 12 mm to a torque of 100 Nm.
6. Lower and remove the garage jack.
7. Align the rear wheels so that the paint marks on the wheel and hub match up. Screw on the wheels. Lower the vehicle and tighten the wheel bolts to 110 Nm.
8. Screw a new dodecahedral axle nut into the hub and tighten to 220 Nm.
Attention! Lightly lubricate the thread and contact surface first.
Attention! During this operation, the vehicle must be on wheels. The nut is fundamentally replaced. When screwing in, the parking brake must be applied and the gear engaged.
9. Coin the axle shaft nut on the collar (arrow), for which drive the collar of the nut with a punch into the slot of the shaft.