Adjusting friction torque of drive pinion bearing - AR35.31-P-0550-17CWC

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MODEL 204, 212 with CODE 700 (Technology Local Content China)

REAR AXLE DIFFERENTIAL GEAR SET

Number	Designation				Model 204	Model 212
BA35.31-P-1009-01E	Collar nut, joint flange to drive pinion	Rear axle differential Ø200	M22	Nm	100	100

Fig 1: Identifying Torque Meter (001 589 49 21 00)

Courtesy of MERCEDES-BENZ USA

Fig 2: Identifying Pin Wrench (129 589 01 07 00)

Courtesy of MERCEDES-BENZ USA

Fig 3: Identifying Adapter (100 589 02 59 00)

Courtesy of MERCEDES-BENZ USA

Fig 4: Identifying Socket Wrench Bit (204 589 01 09 00)

Courtesy of MERCEDES-BENZ USA

Slide joint flange (1) onto drive pinion (2).
While doing so, line up the color codings made during removal relative to the groove (arrow) on the drive pinion (2).

Fig 5: Joint Flange, Drive Pinion And Collar Nut
Courtesy of MERCEDES-BENZ USA
Plug Allen wrench (010) into joint flange (1).
Screw on and tighten new collar nut (3). MODEL 204 with TRANSMISSION 711, 716, 722 with CODE 700 (Technology Local Content China)
MODEL 212 with TRANSMISSION 711, 716, 722

with CODE 700 (Technology Local Content China)

Fig 6: Plugging Allen Wrench Into Joint Flange
Courtesy of MERCEDES-BENZ USA
Plug torque meter (040b) with connection piece (040c) and socket (040a) to collar nut (3) on the joint flange (1).
Measure friction torque and compare against value noted before removal of joint flange (1).
If the measured value is too small:

↓

Increase specified tightening torque by 10 Nm and retighten collar nut (3).

↓

Increase specified tightening torque by another 10 Nm and tighten collar nut (3).
Measure friction torque.
If the measured value is too small:

Fig 7: Measuring Drive Pinion Bearing Friction Torque
Courtesy of MERCEDES-BENZ USA

Repeat procedure until the friction value noted before removal of the joint flange (1) is reached.
Carefully drive upper collar of collar nut (3) using caulker into groove (arrow) on the drive pinion (2).
Do not apply any impacts in the axial direction.

Otherwise, the friction torque may be reduced, whereby noise may develop and there may be damage to the rear axle differential.

Fig 8: Locating Drive Pinion Groove
Courtesy of MERCEDES-BENZ USA