AR26.50-T-0420BB | Disassemble and assemble main shaft | 16.3.10 |
TRANSMISSION 714.140 in MODEL NMB613, 671
T26.50-0029-09
Shown on components on input side
1 5th gear synchronizer ring
2 Thrust spring
3 5th gear synchronizer cone
4 5th and 6th gear sliding sleeve
5 Nut
7 Tapered roller bearing
9 5th and 6th gear synchronizer body
10 6th gear synchronizer ring
11 Thrust spring
23 3rd and 4th gear sliding sleeve
24 3rd and 4th gear synchronizer body
25 3rd gear wheel
26 3rd gear synchronizer ring
27 3rd gear synchronizer cone
28 Thrust spring
29 3rd gear wheel needle roller bearing
51 Main shaft
52 Circlip
53 Shim
12 6th gear synchronizer cone
13 6th gear wheel
14 6th gear wheel needle bearing
17 4th gear wheel
18 4th gear wheel needle bearing
19 4th gear synchronizer ring
20 Thrust spring
21 4th gear synchronizer cone
22 Circlip
T26.50-0028-06
Shown on components on output side
30 Tapered roller bearing
31 Reverse gear synchronizer body
32 Reverse gear sliding sleeve
33 Reverse gearwheel
34 Reverse gear wheel needle roller bearing
35 Reverse gear wheel bush
36 Shim
37 1st gear wheel
38 1st gear synchronizer ring
39 Thrust spring
40 1st gear synchronizer cone
41 1st gear wheel needle roller bearing
43 Circlip
44 1st and 2nd gear sliding sleeve
45 1st and 2nd gear synchronizer body
46 2nd gear wheel
47 2nd gear synchronizer ring
48 Thrust spring
49 2nd gear synchronizer cone
50 2nd gear wheel needle roller bearing
51 Main shaft
| 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. | |
1 | Remove main shaft (51) | ||
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 | |
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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. | |
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. | |
14 | Detach 3rd and 4th gear synchronizer body (24) | Mark installation position. | |
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. | |
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 |
Test specifications for shafts
Number | Designation | Transmission | |
BE26.50-N-1002-03B | Play of locking ring in annular groove on main shaft | mm | 0 to 0,08 |
Gear set, shafts
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 |
Torque wrench
000 589 39 21 00