Adjust gear backlash at differential assembly

AR35.30-B-0475A

12.02.16

Rear axle 740.6, 740.7, 740.8

Adjust gear backlash at differential assembly

B35.30-0101-01

B35.30-0102-01

1 Regulating Unit

2 Dial indicator indicating the assembly measure

3 Square tang

4 Dial indicator, indicating backlash

5 Dial gauge holder

6 Ring gear regulating screw collar

	Adjust
1	Place the dial gage support (5) with the dial indicator (4) on the differential support case	The dial indicator feeler should be in the most vertical position possible, with a 1 mm previous tension on the pressure surface of one of the ring gear teeth.
			*363589022100
			*001589532100
2	Carry out the measurement of the set backlash at four points with a 90° offset	During this operation, establish the point where the backlash is smaller.	*BE35.31-B-1001-03A
3	Lock the pinion at the point with less backlash and move the differential set axially until the smaller backlash is achieved	Observe that there is no backlash in this position, neither precharge on the bearing shoulder in the spider case.
4	Tighten the bearing shoulder screws		*BA35.30-B-1001-05A
5	Check the central differential assembly measure		AR35.30-B-0475-01A
			*620589032100
			*740589002100
6	Firmly turn the ring gear several times until the value in the dial gage remains the same
7	Tighten the screw collar on the sides of the ring gear teeth, until the value in the dial indicator is, at least, 0.05 mm higher than the one adjusted in the standard template	After completing the regulation, the measure should not be higher than + 0.08 mm than the value adjusted in the standard template. In case the informed value is not achieved, remove the regulating unit and repeat the operation. Before that, hit the bearing shoulder covers with a plastic hammer so that the covers and the bearings seat properly.
			*055589000700
			*312589040700
8	After achieving the target measure, check again the ring gear and pinion backlash
9	Remove the support with the dial indicator and put the locking sheets in the threaded rings
10	Check the contact marks between the crown and pinion		AR35.30-B-0475-02B
			*BR00.45-B-1002-07A

Test values for rear axle center assembly gear assembly

Número	Denominação		Rear axle 740.60/61/63, 740.64/65/69, 740.800/804/892, 740.894/896	Rear axle 740.751/752


BE35.31-B-1001-03A	Clearance between ring gear/pinion	mm	0.30...0.41	0.30...0.41