Adjust gear backlash at differential assembly

AR35.30-W-0475A

Adjust gear backlash at differential assembly

21.10.09

Adjust

1

Determine installation dimension for differential assembly

AR35.30-W-0475-01B



*001589532100

 Gauge for rear axle model type (baumuster)
740.892/894/896, 748.21/22/23/24/702/704/705/707

*620589032100

 Gauge for rear axle model type (baumuster)
740.893/895/897,
748.26/27/703/706/708

*748589002100

 Measuring plate for rear axle model type (baumuster) 740.892/894/896, 748.21/22/23/24/702/704/705/707

*740589002100

 Measuring plate for rear axle model type (baumuster) 740.893/895/897,
748.26/27/703/706/708

*748589012100

2

Mount the gauge (1) with dial indicator (2) for transferring the installed dimension determined to the bolts of the bearing caps and screw in the threaded rings (6) using the square drift (3) until the dial indicator (2) is on "0"



*312589040700

3

Position dial indicator (4) with dial indicator holder (5) on the axle housing



*001589532100



*363589022100

4

Rotate crown wheel several times

5

Mount dial indicator tip under preload on the tooth of the ring gear, check the gear backlash and adjust if necessary

 To adjust the gear backlash both the threaded rings (6) must be screwed in or out until the specified value is achieved.

*BE35.30-N-1001-01A



*312589040700

6

Check the gear backlash at two further teeth and adjust if necessary

*BE35.30-N-1001-01A

7

Adjust overdimension of distance at the bearing cap

 Read off the distance dimension transferred by the measuring plate off the dial indicator (2). Screw in the threaded ring (6) until the overdimension is achieved.

*BE35.30-N-1002-01A

8

Crank the ring gear several times and check the gear backlash again at three teeth on the ring gear and adjust if necessary

9

Check ring gear/drive pinion contact pattern

AR35.30-W-0475-02B

*BR00.45-Z-1002-07A

10

Tighten bolts of bearing cap

 Rear axle model 748.2

*BA35.30-N-1002-03A

 Rear axle model 740.8, 748.7

*BA35.30-N-1002-03B

11

Secure ring nut (6) using tab washer

 Rear axle model 748.2

*BA35.30-N-1003-03A

 Rear axle model 740.8, 748.7

*BA35.30-N-1003-03B

Number

Designation

Rear axle 748.21/22/23/24 with ring gear 233 mm dia.

Rear axle 748.21/22/23/24 with ring gear 300 mm dia.

BE35.30-N-1001-01A

Specified value for gear backlash of ring gear

mm

0.20...0.28

0.30...0.41

BE35.30-N-1002-01A

Bearing cover installation dimension

mm

0.05...0.08

0.05...0.08

Number

Designation

Rear axle 748.26/27 with ring gear 233 mm dia.

Rear axle 748.26/27 with ring gear 300 mm dia.

BE35.30-N-1001-01A

Specified value for gear backlash of ring gear

mm

0.20...0.30

0.20...0.30

BE35.30-N-1002-01A

Bearing cover installation dimension

mm

0.05...0.08

0.05...0.08

Number

Designation

Rear axle 740.892/894/896, 748.701/704/707 with 300 mm ring gear-dia.

Rear axle 748.702/705
with ring gear 233 mm dia.

BE35.30-N-1001-01A

Specified value for gear backlash of ring gear

mm

0.30...0.41

0.20...0.28

BE35.30-N-1002-01A

Bearing cover installation dimension

mm

0.05...0.08

0.05...0.08

Number

Designation

Rear axle (NAG)
748.703/706
with 233 mm ring gear-dia.

Rear axle (NAG)
740.893/895/
897/898,
748.708
with 300 mm ring gear-dia.

BE35.30-N-1001-01A

Specified value for gear backlash of ring gear

mm

0.20...0.30

0.20...0.30

BE35.30-N-1002-01A

Bearing cover installation dimension

mm

0.05...0.08

0.05...0.08

Number

Designation

Rear axle 748.21/22/23/24
with through-drive, 233 mm Ø ring gear

BA35.30-N-1002-03A

Bolt, differential bearing cap to axle housing

M161.5

Nm

280

BA35.30-N-1003-03A

Bolt, locking plate to differential bearing cap

Hexagon bolt

Nm

25

Flat collar bolt

Nm

-

Number

Designation

Rear axle 748.21/22/23/24
without throughdrive, 233 mm Ø ring gear

BA35.30-N-1002-03A

Bolt, differential bearing cap to axle housing

M161.5

Nm

280

BA35.30-N-1003-03A

Bolt, locking plate to differential bearing cap

Hexagon bolt

Nm

25

Flat collar bolt

Nm

-

Number

Designation

Rear axle 748.21/22/23/24
with through-drive, ring gear 300 mm dia.

BA35.30-N-1002-03A

Bolt, differential bearing cap to axle housing

M161.5

Nm

280

BA35.30-N-1003-03A

Bolt, locking plate to differential bearing cap

Hexagon bolt

Nm

25

Flat collar bolt

Nm

-

Number

Designation

Rear axle 748.21/22/23/24
without throughdrive, 300 mm Ø ring gear

BA35.30-N-1002-03A

Bolt, differential bearing cap to axle housing

M161.5

Nm

280

BA35.30-N-1003-03A

Bolt, locking plate to differential bearing cap

Hexagon bolt

Nm

25

Flat collar bolt

Nm

-

Number

Designation

Rear axle 748.26/27
with through-drive, ring gear Ø 233 mm

BA35.30-N-1002-03A

Bolt, differential bearing cap to axle housing

M161.5

Nm

370 (30)

BA35.30-N-1003-03A

Bolt, locking plate to differential bearing cap

Hexagon bolt

Nm

-

Flat collar bolt

Nm

35

Number

Designation

Rear axle 748.26/27
without through-drive, ring gear Ø 233 mm

BA35.30-N-1002-03A

Bolt, differential bearing cap to axle housing

M161.5

Nm

280

BA35.30-N-1003-03A

Bolt, locking plate to differential bearing cap

Hexagon bolt

Nm

25

Flat collar bolt

Nm

-

Number

Designation

Rear axle 748.26/27
with through-drive, 300 mm dia. ring gear

BA35.30-N-1002-03A

Bolt, differential bearing cap to axle housing

M161.5

Nm

370 (30)

BA35.30-N-1003-03A

Bolt, locking plate to differential bearing cap

Hexagon bolt

Nm

-

Flat collar bolt

Nm

35

Number

Designation

Rear axle 748.26/27
without through-drive, 300 mm dia. ring gear

BA35.30-N-1002-03A

Bolt, differential bearing cap to axle housing

M161.5

Nm

280

BA35.30-N-1003-03A

Bolt, locking plate to differential bearing cap

Hexagon bolt

Nm

25

Flat collar bolt

Nm

-

Number

Designation

Rear axle 740.892/894/896, 748.701/704/707, without through-drive, 300 mm dia. ring gear

Rear axle
740.893/895/897/
898, (NAG),
with through-drive,
300 mm dia. ring gear

BA35.30-N-1002-03B

Bolt, differential bearing cap to axle housing

M161.5

Nm

280

370 (30)

BA35.30-N-1003-03B

Bolt, locking plate to differential bearing cap

Hexagon bolt

Nm

25

-

Flat collar bolt

Nm

-

35

Number

Designation

Rear axle 748.702
with through-drive,
233 mm dia. ring gear

Rear axle 748.703 (NAG),
with through-drive,
233 mm dia. ring gear

BA35.30-N-1002-03B

Bolt, differential bearing cap to axle housing

M161.5

Nm

280

370 (30)

BA35.30-N-1003-03B

Bolt, locking plate to differential bearing cap

Hexagon bolt

Nm

25

-

Flat collar bolt

Nm

-

35

Number

Designation

Rear axle
748.705
without through-drive,
233 mm dia. ring gear

Rear axle 748.706, (NAG), without through-drive,
233 mm dia. ring gear

BA35.30-N-1002-03B

Bolt, differential bearing cap to axle housing

M161.5

Nm

280

280

BA35.30-N-1003-03B

Bolt, locking plate to differential bearing cap

Hexagon bolt

Nm

25

25

Flat collar bolt

Nm

-

-

Number

Designation

Rear axle 748.708, (NAG), without through-drive,
300 mm dia. ring gear

BA35.30-N-1002-03B

Bolt, differential bearing cap to axle housing

M161.5

Nm

280

BA35.30-N-1003-03B

Bolt, locking plate to differential bearing cap

Hexagon bolt

Nm

25

Flat collar bolt

Nm

-

Number

Designation

Order number

BR00.45-Z-1002-07A

Prussian Blue

-