33 11 021 Replacing shaft seal for drive flange on rear differential (inserted propeller shaft)

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IMPORTANT:

Use only APPROVED OILS .

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 Flange Nut And Bevel Pinion

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Heat up the flange nut using a hot air blower.

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 counter-clockwise 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 .

Fig 3: Gripping Bevel Pinion Using Special Tools (33 5 060) And (33 5 070)

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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 of bevel pinion with final drive oil.

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

Fig 5: Removing Drive Radial Shaft Seal Using Special Tool

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

Fig 6: Cleaning Bevel Pinion

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Check dust plate for damage, replace if necessary.

IMPORTANT:

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

Pack collar insert (1) of flange nut with GREASE .

Apply a thin coating of GREASE to shaded area (2) of flange nut.

Coat at least four thread turns of flange nut with "DREI BOND adhesive type 1385".

Fig 7: Identifying Pack Collar Insert And Grease Shaded Area

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IMPORTANT: 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 Flange Nut And Bevel Pinion

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

Install retaining clip (1).

Fig 9: Identifying Insert Nut And Retaining Clip

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After installation:

Check OIL LEVEL in the rear axle final drive, correct if necessary.