AR26.50-B-0420K | Disassemble and assemble main shaft | 12.02.16 |
Manual transmission 712.45 with Vehicle 979
B26.50-0319-09
1 Tapered roller bearings
2 Locking ring
3 Synchronizer Ring
4 Synchronizer Body
5 Spring
6 Clamp
7 Ball
8 Synchronizer Ring
9 Coupling mouth sleeve
10 Pinch ring
11 3rd gear
12 Needle Roller Bearing
13 Bushing
14 Washer
15 2nd gear
16 Pinch ring
17 Needle Roller Bearing
18 Locking ring
19 Synchronizer Ring
20 Synchronizer Body
21 Synchronizer Ring
22 Coupling mouth sleeve
23 Pinch ring
24 1st gear
25 Needle Roller Bearing
26 Secondary shaft
27 Needle Roller Bearing
28 Reverse gear
29 Synchronizer Body
30 Synchronizer Ring
31 Coupling mouth sleeve
32 Locking ring
33 Needle Roller Bearing
34 5th gear
35 Tapered roller bearings
36 Propeller gear (speedometer)
| Disassemble | ||
1 | Remove the gearbox rear part | ||
2 | Separate the primary shaft from the secondary shaft (26), and fasten the secondary shaft (26) to a vise | Use a protection jaw. | |
3 | Remove the tapered roller bearings (1) | Use a universal extractor with two claws together with the special tool to remove the tapered roller bearings (1). | |
Split ring | |||
4 | Remove the coupling mouth sleeve (9) | Cover the coupling mouth sleeve (9) with a cloth, preventing the clamps (6) and balls (7) from being expelled by the springs (5) action. | |
5 | Remove the lock ring (2), and remove the synchronizer body (4) | When removing the synchronizer body (4), use the two-claw universal extractor together with the special tool. | |
Retaining clip | |||
6 | Remove the 2nd gear (15) with the liner (13) and the washer (14) | Cover the coupling mouth sleeve (22) with a cloth, preventing the clamps (6) and balls (7) from being expelled by the springs (5) action. | |
Retaining clip | |||
7 | Turn the secondary shaft (26) and remove the propeller gear (36) with the tapered roller bearings (35) | Use a protection jaw. | |
Extractor | |||
Split ring | |||
8 | Remove the 5th gear (34), and the needle roller bearing (33) | ||
9 | Remove the lock ring (32) and the coupling mouth sleeve (31) | Cover the coupling mouth sleeve (31) with a cloth, preventing the clamps (6) and balls (7) from being expelled by the springs (5) action. | |
10 | Extract the synchronizer body (29) and remove the reverse gear (28) with the needle roller bearing (27) | When removing the synchronizer body (29), use the two-claw universal extractor together with the special tool. | |
Retaining clip | |||
11 | Turn the secondary shaft (26) and remove the lock ring (18) | Use a protection jaw. | |
12 | Extract the 1st gear (24) with the pinch ring (23), the synchronizer ring (21) and the synchronizer body (20) and remove the needle roller bearing (25) | Use a two-claw universal extractor. | |
| Assemble | ||
13 | Check the wear limit between the synchronizer body and the synchronizer ring | ||
Wear limit between the synchronizer body and the synchronizer ring | |||
14 | Install the needle roller bearing (27) and the reverse gear (28) | Slightly oil the needle roller bearing (27). | |
Danger! | Risk of injury on the skin or in the eyes by handling hot and incandescent objects | Wear gloves, protective clothes and goggles | |
15 | Heat the synchronizer body (29) at approx. 120 °C and install | The side with the lubrication duct in the synchronizer body (29), should be installed towards the reverse gear (28). | |
16 | Install the lock ring (32) | The lock ring (32) should be installed with no axial slack. | |
Lock ring axial slack | |||
17 | Install the 5th gear coupling mouth sleeve (31), springs (5), clamps (6), balls (7) and the synchronizer ring (30) | The 5th gear coupling mouth sleeve (31) has recessed teeth distributed at 120° for fitting the balls. Observe the correct assembly position. | |
Wear limit between the synchronizer body and the reverse gear synchronizer ring | |||
18 | Install the needle roller bearing (33) and the 5th gear (34) | Slightly oil the needle roller bearing (33). | |
Danger! | Risk of injury on the skin or in the eyes by handling hot and incandescent objects | Wear gloves, protective clothes and goggles | |
19 | Heat the tapered roller bearings (35) at approx. 120 °C and install the secondary shaft (26) | ||
20 | Turn the secondary shaft (26) and install the needle roller bearing (25), the 1st gear (24), the pinch ring (23) and the synchronizer ring (21) | Slightly oil the needle roller bearing (25). | |
Danger! | Risk of injury on the skin or in the eyes by handling hot and incandescent objects | Wear gloves, protective clothes and goggles | |
21 | Heat the synchronizer body (20) at approx. 120 °C and install | Assemble: The synchronizer Body (20) should be assembled with the marking “Engine Side” towards the primary shaft. | |
22 | Install the lock ring (18) | The lock ring (18) should be installed with a maximum of 0.10 mm slack. If necessary, replace the lock ring (18) by a new one. | |
Lock ring axial slack | |||
23 | Assemble the coupling mouth sleeve (22), the springs (5), clamps (6), balls (7) and the synchronizer ring (19) | Assemble:The coupling mouth sleeve (22) with the tapered side towards the 1st gear. | |
Wear limit between the synchronizer body and the synchronizer ring | |||
24 | Install the needle roller bearing (17), the pinch ring (16) and the 2nd gear (15) | Slightly oil the needle roller bearing (17). | |
Danger! | Risk of injury on the skin or in the eyes by handling hot and incandescent objects | Wear gloves, protective clothes and goggles | |
25 | Heat the washer (14) with the liner (13) at approx. 120 °C and install | ||
26 | Install the needle roller bearing (12), the 3rd gear (11) with the pinch ring (10) and the synchronizer ring (8) | Slightly oil the needle roller bearing (12) and the pinch ring (10). | |
Wear limit between the synchronizer body and the synchronizer ring | |||
Danger! | Risk of injury on the skin or in the eyes by handling hot and incandescent objects | Wear gloves, protective clothes and goggles | |
27 | Heat the synchronizer body (4) at approx. 120 °C and install | The side with the lubrication duct in the synchronizer body (4), should be installed towards the 3rd gear (11). | |
28 | Install the lock ring (2) | The lock ring (2) should be installed with a maximum of 0.10 mm slack. If necessary, replace the lock ring (2) by a new one. | |
Lock ring axial slack | |||
29 | Install the coupling mouth sleeve (9), the springs (5), clamps (6), balls (7) and the synchronizer ring (3) | The coupling mouth sleeve (9) radial duct should be installed towards the 3rd gear.The coupling mouth sleeve (9) has recessed teeth displaced at 120° to fit the balls. | |
Wear limit between the synchronizer body and the synchronizer ring | |||
Danger! | Risk of injury on the skin or in the eyes by handling hot and incandescent objects | Wear gloves, protective clothes and goggles | |
30 | Heat the tapered roller bearings (1) at approx. 120 °C and install | ||
31 | Install the gearbox rear part |
Gear assembly
Número | Denominação | Gearbox 712.453/454; 712.455/456 | |||
BE26.50-B-1012-01B | Wear limit of synchronizing rings | mm | 0,6 | ||
BE26.50-B-1013-01B | Axial clearance of locking-rings | mm | 0...0,10 | ||
001 589 41 33 00
Extractor
710 589 03 63 00
Retaining clip
710 589 04 63 00
Split ring