Remove/install crown wheel with differential

AR35.30-B-0464XA

Remove/install crown wheel with differential

04.08.2020

Rear axle

772 in model 384.311/333

Modification notes

29.11.2019

Parafusos das capas dos mancais

BA35.30-B-1001-05J

29.11.2019

Porca de travamento do parafuso de encosto da coroa

BA35.30-B-1004-05J

ARS 23 rear axle

1

Differential support housing

2

Crown gear adjustment screw

3

Lock nut

4

2nd speed shifting fork

5

Seals

6

Fork shaft

7

Nuts

8

Tapered washers

9

Studs

10

Locking pin

11

2nd speed lock plate

12

Drive shaft (sun gear)

13

Threaded ring

14

Bearing race

15

Tapered roller bearing

16

Differential assembly (crown gear, satellite case, and planetary reduction gearing)

17

Tapered roller bearing

18

Bearing track

19

Threaded ring

20

Bearing covers

21

Washers

22

Bearing screws

23

Cotter pin



Remove

1

Remove the conical group

.

AR35.30-B-0432XA

2

Measure the clearance between crown gear teeth and pinion

.

AR35.30-B-0475XA

 The clearance value must be within the limit and must be maintained when reinstalling without replacing crown gear and pinion, in order to avoid axle noise.

.Clearance between ring gear/pinion

*BE35.31-B-1001-03B

 Dial gage

*001589532100

 Dial indicator holder

*363589022100

3

Tap with a suitable drift to remove seals (5) and fork shaft (6)

4

Remove 2nd speed shifting fork (4)

5

Remove 2nd speed lock plate (11)

Install/remove locking plate
.

AR35.31-B-0585XA

6

Remove crown gear adjustment screw (2)

.

AR35.30-B-0464-01XA

7

Remove lock ring (10) locking threaded ring (13)

8

Unscrew the bolts (22), remove the washers (21) and the bearing caps (20)

 Mark the bearing cap positions in the places indicated by arrows.

9

Remove threaded rings (13) and (19)

10

Remove differential assembly (16) with installed bearing races

 Mark the positions of all used bearing races to avoid changing them.



Check

11

Clean up and inspect the parts

 Replace those needing to be replaced.

12

Check the sliding of the bearing races (14) and (18)

 The outer bearing races must slide through the thrust blocks, however, without any play. This is necessary to permit the ring gear and pinion teeth adjustment.



Install

13

Mount bearing races (14) and (18) on the differential assembly

 First oil the bearing races.

14

Install differential assembly (16) in differential support housing (1)

.

AR35.30-B-0470XA

 The housing with the pinion must be installed and adjusted already.

15

Install threaded rings (13) and (19)

16

Install bearing caps (20), washers (21) and tighten bolts (22)

 Observe the position of the bearing caps marked at disassembly.

 Observe the coincidence of the threads between the threaded ring and the bearing cap.

 .Bearing cap screws

*BA35.30-B-1001-05J

17

Adjust the preload of the bearings

.

AR35.30-B-4302-01XA

18

Adjust the clearance between the crown and pinion teeth

.

AR35.30-B-0475XA

 For used crown gear and pinion, maintain the clearance as found before disassembly.

.Clearance between ring gear/pinion

*BE35.31-B-1001-03B

 Dial gage

*001589532100

 Dial indicator holder

*363589022100

19

Check the contact marks between the crown and the pinion

.

AR35.30-B-0475-02XA

20

Check axial run-out (crown gear wobble)

 Position the test gauge holder with magnetic base and the test gauge on the differential housing in a way that the gauge feeler touches the crown gear rear surface. Then rotate the pinion and check if there is any lateral run-out variation of the crown gear not within specifications.

.Ring gear maximum axial deviation

*BE35.31-B-1002-03B

 Dial gage

*001589532100

 Dial indicator holder

*363589022100

21

Install 2nd speed lock plate (11)

.

AR35.31-B-0585XA

22

Install new counter lock pin (23) on threaded ring (19)

23

Install crown gear adjustment screw (2)

.

AR35.30-B-0464-01XA

.Clearance between the thrust bolt and the ring gear

*BE35.31-B-1003-03B

 .Clamp nut of the ring gear thrust bolt

*BA35.30-B-1004-05J

24

Install 2nd speed shifting fork (4) and fasten it to fork shaft (6)

 Tap with a suitable drift on shaft (6), to push it into the hole.

25

Install new seals (5), one for each side of shaft (6)

 Apply sealant to the seals before fitting them.

Terolan 307/II, Dichtin 51, epple 22 sealant

*BR00.45-Z-1018-01A

Differential. ring ear and pinion check values

Number

Designation

Rear axle746.772.100

BE35.31-B-1001-03B

Clearance between ring gear/pinion

mm

0,25...0,35

Differential. ring ear and pinion check values

Number

Designation

Rear axle746.772.100

BE35.31-B-1002-03B

Ring gear maximum axial deviation

mm

0,20

Differential. ring ear and pinion check values

Number

Designation

Rear axle746.772.100

BE35.31-B-1003-03B

Clearance between the thrust bolt and the ring gear

mm

-

 Ring gear with differential

Number

Designation

Rear axle746.772.100

BA35.30-B-1001-05J

Bearing cap screws

Nm

200 ... 260

 Ring gear with differential

Number

Designation

Rear axle746.772.100

BA35.30-B-1004-05J

Clamp nut of the ring gear thrust bolt

Nm

200 ... 260

Repair materials

Number

Designation

Order number

BR00.45-Z-1018-01A

Terolan 307/II, Dichtin 51, epple 22 sealant

Use corresponding commercially available repair materials.