Disassemble/assemble rear section of transmission housing

AR26.40-B-2476E

Disassemble/assemble rear section of transmission housing

12.02.16



Disassemble

1

Support rear housing set on an appropriate counter or easel under the planetary gear set (39)

2

Remove screws that fixate high/low selector cylinder cover to the rear part of the housing and remove cover

3

Remove nut (16) . Remove piston (12)

4

Remove nut from exit flange (35) and flange (34)

The flange housing has and interference adjustment by the internal bearing race

5

Carefully elevate housing (8) so that the exit axle slides out of the bearing and the high/low selector rod slides out of the sleeve

6

Remove selection fork set (46) from the synchronizer coupling sleeve. Remove activation gear of the speedometer (21) and the spacer (22)

7

Remove synchronizing ring (42)

8

remove sleeve, ring gear and its set

Identify alignment of the coupling sleeve with the synchronizer pistons (51)

9

Remove pistons (51), springs (52) and rollers (50) from the hub (53). Remove elastic ring (56)

Note the position of the spring and roller pistons

10

Invert the set and at the same time you hold the hub (53), lean the axle extremity on a wood block in order to remove with light hits, the hub (53) and the bearing (54) out of the axle

11

Remove elastic ring (41)

12

Remove synchronizing flange (40)

13

Remove screws (1) and washers (2)

14

Remove reaction plate (3) and the synchronizing flange (4)

15

Remove spacer (6)

If necessary, remove retainer ring (5)

16

Remove screws from oil sealing support (29), the speedometer housing (27) and the oil sealing support (29)

17

Remove speedometer housing (27)

If necessary, remove bearing (28) from housing with an appropriate extractor

18

Remove elastic ring (55) from the high/low synchronizer bearing hub (53) and remove bearing (54)

19

Insert a rivet/steel pin (2 to 2.3 mm in diameter and 10 mm long) in at least three of the ring gear openings to guarantee they are adjacent to the internal elastic ring

20

Tighten a large hose securing clip around the rivets/pins and press the elastic ring (47) inside the sleeve (48)

21

Slide (48) out of the ring gear (43)

22

Apart high/low selection fork (46) from the piston rod (44) pushing the spring pin (45) with appropriate strength

23

Remove rear power inlet cover (36)



Assemble

24

Support high/low selection fork and install piston rod, with screwed extremity to the flat side of the fork

25

Fixate the set in a vise with the screwed end of the selection fork to the left and the lock system retainer pointing at the operator

Align the fixation pins openings. Install a new spring pin (45)

26

Install elastic ring (49) on the high/low synchronizing hub (53) and place the hub on the elastic ring

27

install second elastic ring (55) to fixate the hub bearing

28

Place the ring gear (43) with its flat side down on a clean counter. Place elastic ring (47) on sleeve (48) an put it on the ring gear

Align elastic ring so that its ends are placed among any of the ring gear openings

29

Press elastic ring (47) and push sleeve (48) until the ring expands inside the ring gear locking both parts together

If necessary, use a hose securing clip to press the elastic ring

30

Place the planetary gear support set (39) on a secure easel. Place the synchronizing flange (40) on the guide grooves and install retaining ring (41)

31

Place synchronizing ring (42) on the flange (40). Firmly press the cone down and measure the looseness between the ring and the flange using feeler gauges

If the looseness is out of specification, replace flange and ring

32

Place synchronizing hub (53) and the axle bearing aligning the hub slits with the synchronizing ring rims

Use a rubber hammer and hit so that the bearing is fit into the right position

33

Install retainer ring (56)

34

Install pistons (51) into the slits and slide the ring gear set (43) and coupling sleeve (48) onto the planetary gears

Align the sleeve marks with the central slit of every three hub slit groups

35

Support the sleeve (48) and install the rollers (50) of the synchronizer in the channel, over the piston heads (51). Press sleeve down into neutral position

36

Place synchronizer ring (42) into hub (53)

37

Support rear housing (8) on wood shims and place spacer (6) in the recess

38

Install elastic ring (5) in the external notch of the synchronizer flange (4)

39

Place synchronizer flange (4) and elastic ring in the spacer (6)

40

Place the reaction plate (3) on the synchronizer flange grooves (4)

41

Install screws (1) and washers (2)

42

Position selection fork (46) and the rod set (44) on the synchronizer sleeve (48) with the axle screwed end upwards

43

Invert housing and place it on the exit axle and the selection fork

44

Place activation gear of the speedometer (21) and the spacer (22) in the exit axle

45

Install bearing (28) of the exit axle on the housing using a rubber hammer and an appropriate tool

46

Install a new oil sealing (30) on the support



*055589541500

47

Place housing (27)/bearing (28) set on the axle against the housing

Apply sealing to the housing face

*BR00.45-B-1011-01A

48

Install the oil sealer (30) and the support set

Apply sealing to the bearing housing face

*BR00.45-B-1011-01A

49

Apply a thin layer of grease to the internal oil sealer perimeter and install exit flange (34)

The flange hub adjusts inside the bearing race

50

Apply sealing product and install rear power inlet opening cover (36)

*BR00.45-B-1011-01A



*BA26.30-B-1001-01F

Número

Denominação

Gearboxes 718.180/182/183

BA26.30-B-1001-01F

Rear power outlet cover bolt

M12

Nm

69...78

Número

Denominação

Número de pedido

BR00.45-B-1011-01A

Sealing product - Loctite 574

A 001 989 89 20

BR00.45-B-1018-01A

Sealant

Loctite 515