Vehicles before change point in 1982
REPLACING FINAL DRIVE FLANGE SHAFT SEAL
(with removal/installation of drive pinion)
Remove and install differential - 33 13 010.
Mark installed position of input flange with
a punch mark.
Installation: Lock collar nut in groove of
input flange with a new lockplate.


33 13 010

Check frictional torque with Special Tool
00 2 000 and note,
e.g. 160 Ncm or (14 in.lbs.).

Counterhold input flange wit Special Tool
33 1 100 and unscrew collar nut.
Installation: Torque values¹).


¹) See Specifications

Pull off input flange with Special Tool 31 1 150.
Lift out shaft seal.
Check shaft seal bearing surface on input flange.
Replace input flange when bearing surface shows
serious wear.

Installation: Install drive pinion with a new
clamping sleeve.
Pull front taper roller bearing on to drive pinion
with Special Tools 23 1 300 and 23 2 150.
Important: If taper roller bearing is heated in
an oil bath, it must be given time to cool off
completely prior to bearing adjustments, i.e.
frictional torque tests.

Lubricate sealing lip of shaft seal with final drive
gear lube.
Then knock in shaft seal flush with Special Tools
31 2 040 and 00 5 500.

Press input flange on to input shaft with
Special Tool 23 1 300.
Tighten collar nut and check frictional torque.

Adjust drive pinion bearing to frictional torque
value found prior to disassembling and add
20 Ncm (2 in.lbs.) for new shaft seal.
Important: Collar nut (1) must be tightened
with at least 150 Nm (108 ft.lbs.). If this
tightening torque value is not reached or the
frictional torque value exceeded (see example),
replace holding sleeve (2) and repeat
measurement.
Example:
Frictional torque
prior to disassembling ......160 Ncm (14 in.lbs.)
New shaft seal................+ 20 Ncm (2 in.lbs.)
Adjust drive pinion
bearing to........................180 Ncm (16 in.lbs.)

Vehicles after change point in 1982
RREPLACING SHAFT SEAL AND
FINAL DRIVE INPUT FLANGE
Remove final drive - see 33 10 010.
Mount final drive on Special Tool 33 1 010.
Drain oil. Take off case cover.
Installation:
Replace gasket. Tightening torque*.
Add oil - oil volume*.
See Service Information of Group 00 for
approved oil.


33 10 010
* See Specifications

Remove lockplate.

Press off drive flanges with a tire iron.

Punch mark both bearing caps.
Remove both bearing caps.
Important!
Don´t mix up the bearing caps and spacers.
If necessary, hold the spacers on bearing caps
with pieces of wire.
Installation:
Tightening torque*.


* See Specifications

Differential case bearings and backlash are
adjusted with shims (1).
Check O-ring (2), replacing if necessary.

Remove differential assembly.
Important!
Don´t bend the pulse spider.

Measure friction torque with torque meter
00 2 000 and note the value.
Important!
The measured friction torque value + friction
torque of new shaft seal (20 Ncm/2 in.lbs.)
must be reached when assembling, but not
exceeded.

Hold the input flange with Special Tool
23 0 020.
Unscrew the collar nut.
Installation:
Tightening torque*.


* See Specifications

Pull off the input flange with Special Tool
33 1 150.

Pull out the shaft seal with Special Tool
00 5 010 and a thrust piece.

Dip the shaft seal in final drive gear lube and
drive in the seal flush with Special Tool
33 1 270 or 33 1 190.

Press new input flange on to the input shaft
with Special Tool 23 1 300, but do not tighten.
The bushing does not have to be replaced when
replacing the input flange.

Tighten the input flange with the collar nut in
steps, measuring the friction torque between
steps.

Adjust the drive pinion to the friction torque
value measured prior to disassembling and add
20 Ncm (2 in.lbs.) for new shaft seal.
Example:
Measure torque................... 160 Ncm (14 in.lbs.)
New shaft seal................... + 20 Ncm (2 in.lbs.)
________________________________________
Pinion bearing adjusted to..... 180 Ncm (16 in.lbs.)

If the friction torque value (see example) is
exceeded, replace bushing (2) and repeat the
measuring procedures.
This requires removing and installing drive
pinion - see 33 12 551.
Installation:
Drive in a new lockplate with Special Tools
33 4 050 and 00 5 500.


33 12 551

Installation:
Install complete differential, checking for
correct installation of bearing caps.
The differential bores (1) always face up when
the differential is installed correctly and this
can be seen on the outside by way of tab (2).
If applicable, check backlash and tooth contact
pattern.
See 33 12 551 for additional information.


33 12 551