33 11 021 Replacing radial shaft seal for drive flange on rear axle final drive (inserted propeller shaft)

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Special tools required:

Attention!

Use only approved gearbox oils. See OPERATING FLUIDS .

Failure to comply with this instruction will result in serious damage to the rear axle final drive!

Necessary preliminary work:

Remove THREE-HOLE FLANGE

Remove retaining clip (1) and insert nut (2) with diaphragm seal.

Fig 1: Identifying Retaining Clip And Nut

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Mark position of flange nut (1) to bevel pinion (2).

Fig 2: Identifying Bevel Pinion And Flange Nut Mark Position

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Heat up the flange nut using a hot air blower.

Fig 3: Turning Flange Nut

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NOTE: Do not heat up by more than necessary to undo the nut. Do not use open flames (e.g. welding torch) to heat up the components.

Release flange nut anticlockwise with special tools 33 5 050 and 33 5 070 by gripping the bevel pinion with special tools 33 5 060 and 33 5 070 .

Pull out radial shaft seal with special tool 00 5 010 .

Fig 4: Pulling Radial Shaft Seal Using Special Tool (00 5 010)

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Coat sealing lips of new radial shaft seal and sealing surface on drive pinion with final drive oil.

Drive in radial shaft seal with special tool 33 5 080 or 33 0 150 .

Fig 5: Identifying Special Tool (33 5 080)

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Clean bevel pinion thoroughly to remove remnants of screw locking agent.

Fig 6: Identifying Bevel Pinion Surface

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Check dust plate for damage, replace if necessary.

Attention!

Clean flange nut thoroughly to remove remnants of grease and screw locking agent.

Pack collar insert (1) of flange nut with grease. See OPERATING FLUIDS .

Apply a thin coating of grease to shaded area (2) of flange nut. See OPERATING FLUIDS .

Coat at least four thread turns of the flange nut with

"Drei Bond adhesive type 1385".

Fig 7: Identifying Flange Nut Grease Applying Area

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Attention!

In order to avoid damaging the rear axle final drive, do not under any circumstances tighten down the flange nut (1) beyond the marker point of the bevel pinion (2).

Fig 8: Identifying Bevel Pinion And Flange Nut Mark Position

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Place insert nut (2) with diaphragm seal in flange nut.

Introduce retaining clip (1).

Fig 9: Identifying Retaining Clip And Nut

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After installation:

Check OIL LEVEL IN THE REAR AXLE FINAL DRIVE , correct if necessary.