Disassemble and assemble main shaft

AR26.50-B-0420L

Disassemble and assemble main shaft

12.02.16



Disassemble

1

Remove the main shaft

AR26.50-B-0002C

2

Check the gears axial play

AR26.50-B-2001-01C

Gear axial play

*BE26.50-B-1001-04D

3

Remove the hollow guide pin from the axle (24). Support the shaft (25) and slide the synchronizing sleeve (5) up until the three rollers (7) are released from the sleeve channel. Remove the rollers (7), the sleeve (5), the pistons (8) and the springs from the synchronizing hub (9)

A retainer is installed in the guide pin

4

Remove the retaining ring (2)

5

Assemble the puller on the 3rd/4th synchronizing hub (6) and the 3rd synchronizing ring (4) and press to outside

 Take care to not damage the synchronizing ring teeth

6

Lift the 3rd gear (10), the 3rd needle bearing (12) and the spacer (11)

 Mark the spacer position for the reassembling

7

Invert the shaft assembly in the press and remove the gear (35), the thrust washers and the bearing track. Remove the needle bearing (26)

8

Remove the coupling flange (34) from the synchronizing hub (30)

 There is no synchronizing ring in the reverse gear

9

Remove the internal elastic ring (33)

10

Slide the reverse/low synchronizing sleeve (32) backward until the three rollers (7) are released from the sleeve channel. Remove the rollers (7), the sleeve (32), the pistons (8) and the springs (9) from the synchronizing hub (30)

11

Remove the hub retaining ring (31) reverse/low synchronizer

12

Assemble the puller on the gear (27) and support in the press

13

Remove the needle bearing (26). Separate the synchronizer, the flange (28), the ring (29) and the gear (27)

14

Invert the shaft (25) and remove the retainer (13) from the 2nd needle bearing sleeve

15

Support the shaft in the press under the 1st gear (21) and remove the needle bearing and its respective spacer (22)

 Do not allow the shaft to fall and be damaged or scratched

16

Disassemble the 1st/2nd synchronizing hub (20)



Assemble

Danger!

Risk of injury on the skin or in the eyes by handling hot and incandescent objects

Wear gloves, clothes and safety goggles

AS00.00-B-0002-01A

17

Heat the components at 85 °C

18

Support the shat (25) with the rear end upward. Install the low gear bearing (26)

19

Lubricate the bearing (26) with transmission oil and adjust the gear (27) on the bearing

20

Install the low synchronizing flange (28) on the gear and the synchronizing ring (29) on the flange

21

Take the reverse/low hub (30) heated and fit it with the elastic ring side turned upward and the grooves aligned with the synchronizing ring clincher. Press until reach the complete adjustment and keep pressed for 3 to 4 minutes

 In the case there is a second elastic ring installed in the hub, it must be turned downward

22

Install the ring in the channel (31)

 Take care to not damage the bearings surfaces of the main shaft

23

Check the gear axial play

AR26.50-B-2001-01C

Gear axial play

*BE26.50-B-1001-04D

24

Assemble the springs (9) and the pistons (8) in the hub (30). Fit the sleeve (32) on the hub, with the sharp teeth downward. Place the rollers (7) on the pistons heads (8) and press on the sleeve

25

Install an elastic ring (33) in the synchronizing hub

Check if the tabs are correctly fit in the hub slots

26

Install the reverse gear flange (34) in the synchronizing hub

 There is no synchronizing ring in the reverse gear

27

Lubricate and install the bearing (36) and the reverse gear (35) on the axle

28

Position the thrust washer (37) on the gear, with the chamfered side faced up

29

Install the rear bearing internal track heated and adjust it on the axle

Use a guide to assemble the bearing



*055589091400

30

Invert the shaft in the vise, lubricate and install the bearing (23) and the gear (21)

31

Install the bearing spacer (22) in the gear

32

Install the synchronizing flange (17) of the 1st gear and synchronizing ring on the flange (18)

33

Support the shaft in the vise, fit the 1st/2nd synchronizing hub (20) heated in the shaft grooves, align the slots with the synchronizing rings clincher and press the hub to its correct position

34

Check the gear axial play

AR26.50-B-2001-01C

Gear axial play

*BE26.50-B-1001-04D

35

Assemble the springs (9) and the pistons (8) in the hub and install the 1st/2nd gear synchronizing sleeve (9) and the rollers (7)

36

Fit the synchronizing ring (18) and the 2nd gear flange in the synchronizing hub assembly (17)

37

Lubricate and fit the gear (16) and the 2nd baring (15) on the synchronizing ring

Use Vaseline

*BR00.45-B-1001-06A

38

Position the 2nd gear sleeve (14) inside the bearing on the shaft

39

Install the ring in the axle channel (13)

 Take care to not damage the bearings surfaces of the main shaft

40

Check the axial play

AR26.50-B-2001-01C

Gear axial play

*BE26.50-B-1001-04D

41

Lubricate and fit the gear (10) and the 3rd baring (12) on the axle

42

Install the bearing spacer (11) in the 3rd speed gear

43

Position the flange (3) and the synchronizing ring (4) on the gear (10)

44

Position the 3rd/4th synchronizing hub (6) on the shaft with the deepest side faced downward. Press the hub securely up to its position and keep pressed for 3 to 5 minutes

Make sure that the hub grooves are aligned with the synchronizing ring clinchers

45

Install the retaining ring (2)

46

Check the axial play

AR26.50-B-2001-01C

Gear axial play

*BE26.50-B-1001-04D

47

Assemble the springs (9) and the pistons (8) in the hub. Install the sleeve (5) and the bearings (7)

48

Install the guide pin in the axle end (24)

49

Install the main shaft

AR26.50-B-0002C

Número

Denominação

Gearboxes 718.180, 718.182, 718.183

BE26.50-B-1001-04D

Gear axial play

mm

3rd marcha

0,31-0,53

mm

2nd gear

0,35-0,48

mm

1st gear

0,35-0,48

mm

Low

0,35-0,48

mm

Reverse gear

0,27-0,44

Número

Denominação

Número de pedido

BR00.45-B-1001-06A

Vaseline

-