Disassemble and assemble main shaft

AR26.50-T-0420BB

Disassemble and assemble main shaft

16.3.10

 

Disassemble/assemble

 Danger!

Risk of injury to skin and eyes caused by handling hot or glowing objects.

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

AS00.00-Z-0002-01A

1

Remove main shaft (51)

AR26.50-T-0001AA

2

Place or clamp main shaft (51) in a suitable device

3

Detach 5th gear synchronizer with 5th and 6th gear sliding sleeve (4)

 The 5th gear synchronizer consists of: 5th gear synchronizer ring (1), annular spring (2) and 5th gear synchronizer cone (3).

 Assembly: When the main shaft (51) is assembled, the wide collar on the 5th and 6th gear sliding sleeve (4) must point in the direction of the 6th gear wheel (13).

4

Unlock and unscrew nut (5)

 The nut (5) has a left-hand thread.

 Assembly: Replace self-locking nut (5).



Notes on self-locking nuts and bolts

All models

AH00.00-N-0001-01A



*BA26.50-N-1002-01I



*000589392100

5

Pull off tapered roller bearing (7).

 Assembly: Heat the inner race of the tapered roller bearing (7) to approx. 140 °C with the heating plate and push onto the main shaft (51).

When it has cooled, the inner race of the tapered roller bearing (7) must touch the collar of the main shaft (51).

6

Detach 5th and 6th gear synchronizer body (9)

 Mark installation position.

 Assembly: Observe marking on 5th and 6th gear synchronizer body (9) to determine the installation position.

7

Detach 6th gear wheel (13) with 6th gear synchronizer

 The 6th gear synchronizer consists of: 6th gear synchronizer ring (10), annular spring (11) and 6th gear synchronizer cone (12).

8

Detach 6th gear wheel needle bearing (14)

 Assembly: Oil the needles of the 6th gear wheel needle bearing (14).

9

Detach circlip (52) and remove spacer washer (53)

 Assembly: Check the play at the circlip (52) in the radial groove of the main shaft (51) using a feeler gauge. Aim for a setting without play. If necessary, select a circlip (52) of correct thickness.

*BE26.50-N-1002-03B

10

Detach 4th gear wheel (17) together with 4th gear synchronizer

 The 4th gear synchronizer consists of: 4th gear synchronizer ring (19), annular spring (20) and 4th gear synchronizer cone (21).

11

Detach 4th gear wheel needle bearing (18)

 Assembly: Oil the needles of the 4th gear wheel needle bearing (18).

12

Detach 3rd and 4th gear sliding sleeve (23)

 Assembly: When the main shaft (51) is assembled, the wide collar on the 3rd and 4th gear sliding sleeve (23) must point in the direction of the 3rd gear wheel (25).

13

Remove circlip (22).

 Assembly: Check the play at the circlip (22) in the radial groove of the main shaft (51) using a feeler gauge. Aim for a setting without play. If necessary, select a circlip (22) of correct thickness.

*BE26.50-N-1002-03B

14

Detach 3rd and 4th gear synchronizer body (24)

 Mark installation position.
If the 3rd and 4th gear synchronizer body (24) is firmly seated, pull it off using a three-arm puller. Fit three-arm puller to 3rd gear wheel (25). Heat the 3rd and 4th gear synchronizer body (24) with a hot air gun if necessary.

 Assembly: Observe marking on 3rd and 4th gear synchronizer body (24) to determine the installation position.

15

Detach 3rd gear wheel (25) with 3rd gear synchronizer

 The 3rd gear synchronizer ring (26) is installed on the 3rd gear wheel (25).

The 3rd gear synchronizer consists of: 3rd gear synchronizer ring (26), 3rd gear synchronizer cone (27) and

annular spring (28).

16

Detach 3rd gear wheel needle roller bearing (29)

 Assembly: Oil the needles of the 3rd gear wheel needle bearing (29).

17

Pull off tapered roller bearing (30).

 Assembly: Heat the inner race of the tapered roller bearing (30) to approx. 140 °C with the heating plate and push onto the main shaft (51).

When it has cooled, the inner race of the tapered roller bearing (30) must touch the reverse gear synchronizer body (31).

18

Remove reverse gear gearwheel (33).

19

Detach reverse gear synchronizer body (31) from reverse gear wheel (33)

20

Detach reverse gear sliding sleeve (32) from reverse gear synchronizer body (31)

 Assembly: Identify the installation position of the reverse gear sliding sleeve (32).

 Assembly: Observe installation position marking on reverse gear sliding sleeve (32).

21

Detach reverse gear wheel needle roller bearing (34)

 Assembly: Oil the needles of the reverse gear wheel needle bearing (34).

22

Detach 1st gear wheel (37) together with reverse gear wheel bushing (35) and spacer washer (36)

 Fit three-arm puller to 1st gear wheel (37). Heat the reverse gear wheel bush (35) with a hot air gun if necessary.

 Assembly: Heat up the reverse gear wheel bushing (35) and spacer washer (36) to approx. 180 °C using the hot plate and push onto the main shaft (51).

After cooling down it must not be possible to rotate the spacer washer (36) and the reverse gear wheel bushing (35) must abut the spacer washer (36).

23

Detach 1st gear wheel needle roller bearing (41)

 Assembly: Oil the needles of the 1st gear wheel needle bearing (41).

24

Detach 1st gear synchronizer

 The 1st gear synchronizer consists of: 1st gear synchronizer ring (38), annular spring (39) and 1st gear synchronizer cone (40).

25

Detach 1st and 2nd gear sliding sleeve (44)

 Assembly: When the main shaft (51) is assembled, the wide collar on the 1st and 2nd gear sliding sleeve (44) must point in the direction of the 1st gear wheel (37).

26

Remove circlip (43).

 Assembly: Check the play at the circlip (43) in the radial groove of the main shaft (51) using a feeler gauge. Aim for a setting without play. If necessary, select a circlip (43) of correct thickness.

*BE26.50-N-1002-03B

27

Detach 1st and 2nd gear synchronizer body (45)

 Mark installation position of 1st and 2nd gear synchronizer body (45).

 Assembly: Observe installation position of 1st and 2nd gear synchronizer body (45). The smooth surface of the 1st and 2nd gear synchronizer body (45) must point in the direction of the circlip (43).

28

Detach 2nd gear synchronizer

 The 2nd gear synchronizer consists of: 2nd gear synchronizer ring (47), annular spring (48) and 2nd gear synchronizer cone (49).

29

Remove 2nd gear wheel (46)

30

Detach 2nd gear wheel needle roller bearing (50)

 Assembly: Oil the needles of the 2nd gear wheel needle bearing (50).

31

Disassemble 1st gear synchronizer

 Press 1st gear synchronizer ring (38) off 1st gear wheel (37). Press annular spring (39) off 1st gear synchronizer ring (38) and detach. Detach 1st gear synchronizer cone (40) from 1st gear synchronizer ring (38).

32

Disassemble 2nd gear synchronizer

 Press 2nd gear synchronizer ring (47) off 2nd gear wheel (46). Press annular spring (48) off 2nd gear synchronizer ring (47) and detach. Detach 2nd gear synchronizer cone (49) from 2nd gear synchronizer ring (47).

33

Disassemble 3rd gear synchronizer

 Press annular spring (28) off 3rd gear synchronizer ring (26) and detach. Detach 3rd gear synchronizer cone (27) from 3rd gear wheel (25).

34

Disassemble 4th gear synchronizer

 Press 4th gear synchronizer ring (19) off 4th gear wheel (17). Press annular spring (20) off 4th gear synchronizer ring (19) and detach. Detach 4th gear synchronizer cone (21) from 4th gear synchronizer ring (19).

35

Disassemble 5th gear synchronizer

 Press annular spring (2) off 5th gear synchronizer ring (1) and detach. Detach 5th gear synchronizer cone (3) from 5th gear synchronizer ring (1).

36

Disassemble 6th gear synchronizer

 Press 6th gear synchronizer ring (10) off 6th gear wheel (13). Press annular spring (11) off 6th gear synchronizer ring (10) and detach. Detach 6th gear synchronizer cone (12) from 6th gear synchronizer ring (10).

37

Clean all parts and check for wear, renew if necessary.

38

Assemble in the reverse order

Number

Designation

Transmission
714.140/143/160/161

BE26.50-N-1002-03B

Play of locking ring in annular groove on main shaft

mm

0 to 0,08

Number

Designation

Transmission 714.100/120/140 without code B10 or code B11

Transmission 714.100/120/140 with code B10

Transmission 714.100/120/140 with code B11

BA26.50-N-1002-01I

Nut on main shaft

Nm

340

340

340