Correcting Articulation Angle On Rear Axle Differential - AR41.10-P-0086-12MNA

Model 253.388/389/988/989

	Notes on self-locking nuts and bolts		AH00.00-N-0001-01A
	000 588 10 62 00 Support plate		WS26.00-P-3309B
	000 588 11 62 00 Major assembly mount		WS01.00-P-0092B

CHECK VALUES FOR PROPELLER SHAFT ARTICULATION ANGLE

Number	Designation		Model 253
BE41.10-P-1003-01G	Rear inclination angle of rear propeller shaft relative to rear axle differential (∠3)	∠°	-1, 00...-0, 20

REAR AXLE CARRIER

Number	Designation		Model 253
BA35.10-P-1006-01H	Bolt, rear axle differential to rear transverse bridge	Nm	170

Correct articulation angle at rear (∠3)

To correct the articulation angle on the rear axle differential (50) suitable adjusting plates (2) are available as a replacement part set The replacement part set contains 6 adjusting plates (2) and therefore it has 6 different setting options each (3 adjusting plates (2) times 2 alignments) in 1 mm steps A 1 mm change to the adjusting plate (2) causes a change in angle of 0.2°.

Support rear axle differential (50) with support plate and major assembly mount.
Remove bolts (3).
Depending on the correction insert appropriate adjusting, plates (2) together with bolts (3)
Model 205 386/387/486/487 Model 253.388/389/988/989

The adjusting plates (2) must be inserted exactly onto the bearing.

Otherwise damage will occur.

Replace bolts (3) and recut thread in cover of rear axle differential (50).
Tighten bolts (3) .
Take off support plate and major assembly mount.

Courtesy of MERCEDES-BENZ USA

Example for calculating ratio of angle change to adjusting plates (2)

The articulation angle between the propeller shaft and the rear axle differential (50) should be -0.7°. An adjusting plate (2) with 2 notches at the top (+1.5 mm) has already been inserted into the vehicle, but +0.1° was measured.

Required correction to articulation angle: (-0.7°) - (+0.1°) = -0.8°→ 4 mm required change towards a smaller articulation angle → insert new adjusting plates (2) with 3 notches at bottom.

Remove installed adjusting plates (2) with 2 notches at top (+1.5 mm) and replace with adjusting plates (2) with 3 notches at bottom (-2.5 mm).

This is equivalent to the required total change of 4 mm.

1 notch at top: +0.5 mm (+0.1°)
2 notches at top: +1.5 mm (+0.3°)
3 notches at top: +2.5 mm (+0.5°)
1 notch at bottom: -0.5 mm (-0.1°)
2 notches at bottom: -1.5 mm (-0.3°)
3 notches at bottom: -2.5 mm (-0.5°)