Disassemble and assemble main shaft

AR26.50-G-0420C

Disassemble and assemble main shaft

20.12.2019

Transmission

714.190 in model 800

1

Nut

6

Tapered roller bearing

11

Synchronizer body

2

Tapered roller bearing

7

Shim

12

Synchronizer ring

3

Shim

8

Synchronizer ring

13

Gearwheel for 3rd gear

4

Tapered roller bearing

9

Sliding sleeve

14

Needle bearing

5

Constant speed gear 2

10

Retaining ring

15

Main shaft

15

Main shaft

20

Needle bearing

25

Retaining ring

16

Tapered roller bearing

21

Bearing sleeve

26

Sliding sleeve

17

Synchronizer body

22

Spacer ring

27

Synchronizer body

18

Sliding sleeve

23

Gearwheel for 1st gear

28

Gearwheel for 2nd gear

19

Reverse gearwheel

24

Needle bearing

29

Needle bearing

15

Main shaft

30

Tool

 Warning

Risk of injury caused by pinching or crushing when working on springs or spring bodies that are under tension

Use only approved tensioning devices; additionally screen off hazardous area if necessary. Check special tools for damage and proper operation (visual inspection). Wear protective gloves.

AS00.00-Z-0001-01A

 Warning

Risk of injury. Skin or eye injuries may result when handling hot or glowing objects.

Wear protective gloves, protective clothing and safety glasses, if necessary.

AS00.00-Z-0002-01A

Topical note

Notes on self-locking nuts and bolts

AH00.00-N-0001-01A



Disassemble

1

Remove main shaft (15).

AR26.10-G-0005D

2

Insert main shaft (15) into output flange.

 Fasten output flange securely onto suitable base, e.g. bolted to a workbench.

3

Remove nut (1).

 Always replace the nut (1) after removal.
The nut (1) is micro-encapsulated and has a left-hand thread.

4

Place suitable tool (30) onto main shaft (15).

 The tool (30) is used to protect the main shaft (15) for the following operations.

5

Pull off tapered roller bearing (2).

 Helper required.

 Gripper

*750589023400

 Adapter

*715589123400

 Adapter

*715589113400

 Hydraulic cylinder

*715589153400

 Hand pump

*652589003321

6

Remove shim (3).

7

Position puller on sliding sleeve (9) and detach constant speed gear 2 gearwheel (5) together with tapered roller bearing (4).

 Helper required.

 Puller without spindle

*715589023315

 Hydraulic spindle

*715589023314

 Hand pump

*652589003321

8

Remove shim (7), synchronizer ring (8) and sliding sleeve (9).

9

Remove tapered roller bearing (6).

 Gripper

*715589243400

 Hydraulic cylinder

*715589153400

 Hand pump

*652589003321

10

Remove retaining ring (10).

11

Detach synchronizer body (11).

 If necessary, use suitable puller.

12

Remove synchronizer ring (12).

13

Remove 3rd gear gearwheel (13).

14

Remove needle bearing (14).

15

Remove main shaft (15) and turn through 180°.

 Helper required.

16

Position puller on 1st gear gearwheel (23) and remove parts assembly.

 The parts assembly is comprised of the following parts:
Gearwheel for 1st gear  (23), spacer ring (22), gearwheel for reverse gear (19), sliding sleeve (18), synchronizer body (17), tapered roller bearing (16) and bearing bushing (21).

 Puller without spindle

*715589023315

 Hydraulic spindle

*715589023314

 Hand pump

*652589003321

17

Remove needle bearings (20, 24).

18

Remove retaining ring (25).

19

Remove sliding sleeve (26).

20

Remove synchronizer body (27).

21

Remove 2nd gear gearwheel (28).

22

Remove needle bearing (29).



Assemble

23

Coat needle bearing (29) with clean transmission oil and slide onto main shaft (15).

24

Coat thrust collar of 2nd gear gearwheel (28) with clean transmission oil and slide onto main shaft (15).

25

Install synchronizer body (27).

 The long collar of the synchronizer body (27) must point towards the 2nd gear gearwheel (28).

26

Install retaining ring (25).

27

Measure end play of retaining ring (25) using feeler gauge.

Axial play of main shaft retaining rings

*BE26.50-N-1004-01M

If the end play lies outside the tolerance,



install retaining ring (25) of appropriate material thickness.

28

Install sliding sleeve (26).

29

Coat needle bearing (24) with clean transmission oil and slide onto main shaft (15).

30

Coat thrust collar of 1st gear gearwheel (23) with clean transmission oil and slide onto main shaft (15).

31

Heat spacer ring (22) to approx. 100 °C and slide onto main shaft (15).

32

Heat bearing bushing (21) to approx. 140 °C, slide on and reposition up to contact surface.

33

Coat needle bearing (20) with clean transmission oil and slide onto main shaft (15).

34

Coat thrust collar of reverse gear gearwheel (19) with clean transmission oil and slide onto main shaft (15).

35

Insert shift fork into sliding sleeve (18) and install sliding sleeve (18).

 Observe installation position of sliding sleeve (18); the rounded teeth point upward.

36

Slide synchronizer body (17) onto main shaft (15).

37

Heat tapered roller bearing (16) to approx. 140 °C, slide on and reposition up to contact surface.

38

Remove main shaft (15) and turn through 180°.

 Fasten output flange securely onto suitable base, e.g. bolted to a workbench.
Helper required.

39

Coat needle bearing (14) with clean transmission oil and slide onto main shaft (15).

40

Coat thrust collar of 3rd gear gearwheel (13) with clean transmission oil and slide onto main shaft (15).

41

Slide synchronizer ring (12) onto main shaft (15).

42

Slide synchronizer body (11) onto main shaft (15).

 The long collar of the synchronizer body (11) must point towards the 3rd gear gearwheel (13).

43

Slide sliding sleeve (9) onto main shaft (15).

44

Install retaining ring (10).

45

Measure end play of retaining ring (10) using feeler gauge.

Axial play of main shaft retaining rings

*BE26.50-N-1004-01M

If the end play lies outside the tolerance,



install retaining ring (10) of appropriate material thickness.

46

Heat tapered roller bearing (6) to approx. 140 °C, slide on and reposition up to contact surface.

47

Install synchronizer ring (8).

48

Install shim (7).

49

Coat tapered roller bearing (6) with clean transmission oil.

50

Install constant speed gearwheel 2 (5).

51

Heat tapered roller bearing (4) to approx. 140 °C, coat with clean transmission oil, install and reposition.

 It must still be possible to turn constant speed gear 2 gearwheel (5) slightly.

52

Determine shim (3) for main shaft (15).

AR26.50-G-0420-11D

Axial play of constant speed gear 2 tapered roller bearing

*BE26.50-N-1006-01M

 Adjusting sleeve

*715589002100

 Dial gage

*001589532100

 Extension

*366589002105

 Setting gauge

*714589042100

53

Install determined shim (3).

54

Heat tapered roller bearing (2) to approx. 140 °C, slide on and reposition up to contact surface.

55

Allow tapered roller bearing (2) and main shaft (15) to cool down.

56

Recut counter thread of nut (1).

 Left-hand thread.

57

Attach new nut (1).

 Always replace the nut (1) after removal.
The nut (1) is micro-encapsulated and has a left-hand thread.

 Locknut, pilot bearing to main shaft

*BA26.50-N-1002-01R

58

Coat tapered roller bearing (2) with clean transmission oil.

59

Install main shaft (15).

AR26.10-G-0010D

Test and adjustment values for gear set

Number

Designation

Transmission 714.190 in model 800

BE26.50-N-1004-01M

Axial play of main shaft retaining rings

mm

0,079

Test and adjustment values for gear set

Number

Designation

Transmission 714.190 in model 800

BE26.50-N-1006-01M

Axial play of constant speed gear 2 tapered roller bearing

mm

0,02...0,08

 Gear set, shafts

Number

Designation

Transmission 714.190 in model 800

BA26.50-N-1002-01R

Locknut, pilot bearing to main shaft

Nm

340