Adjust gear backlash on differential assembly ring gear · ar3330b0475a · Mercedes-Benz WIS

AR33.30-B-0475A

Adjust gear backlash on differential assembly ring gear

12.02.16

Front axle 733 with Vehicle 384.114, 384.145, 693.182

Adjust gear backlash on differential assembly ring gear

B33.30-0044-01

B33.30-0043-01

1  Dial Gauge

2  Square spike

3  Adjustment device

	Adjusting
1	Tighten the threaded rings until the bearings rotate without clearance or pre-load	 The crown gear must still rotate with a slight clearance between teeth.	*312589040700
2	Firmly tighten the threaded rings and simultaneously rotate the drive gear while using a plastic hammer to apply a few vigorous strokes to the bearing caps and the side of the drive gear
3	Loosen the threaded rings and then tighten them again until they stop softly	 In this position the threaded rings must have no clearance nor pre-load
4	Secure the magnetic block support with the comparator to the housing, pointing the probe on the pressure flank of one of the drive gear teeth, with 1 mm prior tension		*001589532100
			*363589022100
5	Carry out the backlash measurement of the ring gear and pinion teeth in four points offset 90° and determine the lowest backlash point.
6	Maintaining the smallest clearance position, move the drive gear with differential assembly axially until the lowest specified clearance is obtained	 Loosen one threaded ring and tighten the other by the same measure to maintain the bearing adjustment.
		Drive gear and pinion tooth clearance	*BE33.30-B-1001-02A
7	Remove the support with the comparator and tighten the bearing cap screws opposite the drive gear teeth		*BA33.30-B-1001-03A
8	Secure the adjustment device to the already tightened bearing cap, with its flag parallel to the drive gear		*354589002100
9	Secure the magnetic block support with the comparator, resting the probe at right angles on the flag, adjusted to ‘0’ and with a 1 mm prior tension		*363589022100
			*001589532100
10	Rotate the drive gear continuously while tightening the threaded ring on the drive gear tooth side, until the initial pre-load is obtained on the comparator	 For used bearings the lower limit should be maintained and for new ones the upper limit	*BE33.30-B-1005-01A
			*312589040700
11	Tighten the bearing cap screws on the drive gear tooth side		*BA33.30-B-1001-03A
12	Rotate the drive gear and check the final pre-load		*BE33.30-B-1005-01A
13	Check tooth clearance in the drive gear and pinion assembly	 If clearance is not within the specified values, repeat the adjustment procedure.	*BE33.30-B-1001-02A
14	Adjust the pressure screw in a way to obtain a comparator bearing cup movement reading of 0,010 to 0,025 mm, after tightening the counter nut
15	Confirm the contact markings for the drive gear teeth		AR33.30-B-0475-02A
			*BR00.45-B-1001-07A

Ring gear with differential

Número	Denominação			Front axle 733.0


BE33.30-B-1005-01A	Bearings pre-load in the satellite box
		-Before tightening the bearing cover bolts	mm	0.005 ... 0.02
		-After tightening the bearing cover bolts	mm	0.02 ... 0.04
		Final Measurement	mm	-