Replacement

REMOVAL

WARNING
^ Risk of fatal injury due to vehicle slipping off or tilting on the hoist
^ Align vehicle between the pillars of the hoist and position the four support plates at the hoist mounting points specified by the vehicle manufacturer

- Refer to the illustration above and the information below during removal procedures
- Remove twelve-point collared nut of rear axle shaft as follows:





- Engage parking brake
- Unscrew and remove twelve-point collared nut (12) for fastening the rear axle shaft
- Push rear axle shaft out of rear axle shaft flange
- If rear axle shaft is tight or seized proceed as follows:
a. Screw hexagon nut onto threaded bolt of tool No. 140 589 03 61 00 or 210 589 03 43 00, or equivalent
b. Screw threaded bolt into threaded spindle of the removal tool and tighten securely
c. Press out rear axle shaft with removal/installation tool and remove
- Remove rear axle shaft (37) bolts at connecting flange
- Move rear axle shaft into approximately the horizontal position, push together and remove obliquely downwards at an angle from the connecting flange
- When loosening the locking bolts, ensure that the tool bit is properly inserted in the multi-toothed or hexagon profile, clean if necessary.

CAUTION: When the rear axle shaft is removed, the vehicle must not be moved on its wheels to avoid damage to the wheel bearings.

INSPECTION
- Check constant velocity joints, rubber boots and end cover for leaks and damage
- If outer constant velocity joint is defective replace complete rear axle shaft
- If inner constant velocity joint is defective, or if rubber boots and end covers are damaged or leaking Replace appropriate parts

INSTALLATION
- Install in reverse order, noting the following information:
- Replace self-locking internal polygon or hexagon socket bolts and washers.
- Lightly lubricate bolts on thread and bolt head support
- Insert axle into wheel carrier
- If axle is seized or tight, proceed as follows:

NOTE:
^ With seized rear axle shafts, the splined shaft profile of the rear axle shaft and rear axle shaft flange are to be cleaned mechanically before installing
^ An 8 mm thread is to be cut in order to be able draw in the rear axle shaft using the removal/installation tool in the event of tightness





a. Screw drilling fixture (039) onto the shalt journal of the rear axle shaft





b. Insert drilling bush (039a) and lock with fixing bolt (039c)





c. Using a 4 mm drill, drill core bore hole to a depth of a = approx 20 mm, cooling and lubricating the drill in the process
d. Remove drilling bush (039a) with fixing bolt (039c)
e. Using a 68 mm drill, re drill core bore hole to a depth of a = approx 20 mm, cooling and lubricating the drill in the process





f. Tap 8 mm thread using a stage 1 and 2 tap
g. Unscrew drilling fixture (039) from rear axle shaft and clamp rear axle shaft in a vise
h. Finish-tap 8 mm thread using a stage 3 tap
i. Draw rear axle shaft into rear axle shaft flange using the removal/installation tool (previous 140 589 03 61 00, new 210 589 03 43 00)
- Install NEW twelve-point collared nut and tighten to: 220 Nm
- Using NEW polygon or hexagon socket bolts and washers, connect axle shaft to connecting flange, then tighten to: 70 Nm