Disassemble and assemble main shaft

AR26.50-T-0420B

Disassemble and assemble main shaft

16.3.10

24.12.04

Note on determining installation position of 5th and 5th gear sliding sleeve (4) revised

Step 3 "Assembly"

 

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)

Transmission 714.120

AR26.50-T-0001BA

Transmission 714.690/691/692

AR26.50-T-0001B

2

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

3

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

 The 6th gear synchronizer consists of: 6th gear synchronizer ring (1), annular spring (2) and 6th 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 5th gear wheel (13).

4

Unlock and unscrew nut (5)

 The nut (5) has a left-hand thread.

 Assembly: Replace nut (5).



*BA26.50-N-1002-01I



*000589392100

5

Detach thrust plate (6)

Only on transmission 714.690/691/692

6

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).

7

Detach shim (8)

Only on transmission 714.690/691/692

8

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

Only if transmission 714.120 fitted

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

*BE26.50-N-1002-03B

9

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.

10

Detach 5th gear wheel (13) with 5th gear synchronizer

 The 5th gear synchronizer consists of: 5th gear synchronizer ring (10), annular spring (11) and 5th gear synchronizer cone (12).

11

Detach 5th gear wheel needle roller bearing (14)

 Assembly: Oil the needles of the 5th gear wheel needle bearing (14).

12.1

Detach 4th gear wheel (17) together with the 4th gear synchronizer as well as 5th gear wheel bushing (15) and spacer washer (16)

Only on transmission 714.690/691/692

 Use a three-arm puller to pull off the 4th gear wheel (17). Heat the 5th gear wheel bush (15) with a hot air gun if necessary.

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

 Assembly: Heat the 5th gear wheel bush (15) to approx.
180 °C with the heating plate and push onto the main shaft (51). The 5th gear wheel bushing (15) must abut the spacer washer (16).

12.2

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

Only if transmission 714.120 fitted

 A spacer washer (16) which is secured with a circlip may be located in front of the 4th gear wheel (17).

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

13

Detach 4th gear wheel needle bearing (18)

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

14

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).

15

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

16

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 the three-arm puller to the 3rd gear wheel (25), if necessary heat 3rd and 4th gear synchronizer body (24) with hot air gun.

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

17

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).

18

Detach 3rd gear wheel needle roller bearing (29)

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

19

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).

20

Remove reverse gear gearwheel (33).

21

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

22

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

23

Detach reverse gear wheel needle roller bearing (34)

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

24

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

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

 Assembly: Heat the reverse gear wheel bush (35) to approx. 180 °C with the heating plate and push onto the main shaft (51).

After cooling down the reverse gear wheel bushing (35) must abut the spacer washer (36).

25

Detach 1st gear wheel needle roller bearing (41)

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

26

Detach 1st gear synchronizer

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

27

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).

28

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

29

Detach shim (42)

Only on transmission 714.690/691/692

30

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

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

31

Detach 2nd gear synchronizer

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

32

Remove 2nd gear wheel (46)

33

Detach 2nd gear wheel needle roller bearing (50)

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

34

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 remove. Detach 1st gear synchronizer cone (40) from 1st gear synchronizer ring (38).

35

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).

36

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).

37

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).

38

Disassemble 5th gear synchronizer

 Press 5th gear synchronizer ring (10) off 5th gear wheel (13). Press annular spring (11) off 5th gear synchronizer ring (10) and remove. Detach 5th gear synchronizer cone (12) from 5th gear synchronizer ring (10).

39

Disassemble 6th gear synchronizer

 Press annular spring (2) off 6th gear synchronizer ring (1) and detach. Detach 6th gear synchronizer cone (3) from 6th gear synchronizer ring (1).

40

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

41

Assemble in the reverse order

Number

Designation

Transmission
714.100/120

Transmission
714.690/691/692

BE26.50-N-1002-03B

Play of locking ring in annular groove on main shaft

mm

0 to 0,08

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

Number

Designation

Transmission 714.690/691 except code B10

Transmission 714.690/691
with Code B10

BA26.50-N-1002-01I

Nut on main shaft

Nm

350

350

Number

Designation

Transmission
714.692 without code B10 or code B11

Transmission
714.692
with code B10

Transmission
714.692
with code B11

BA26.50-N-1002-01I

Nut on main shaft

Nm

350

350

350