Changing Selector Forks - Valtra 6000 Workshop Manual

42 Gearbox
8. Take the hold of the rail and move it. It must move loosely.
9. Then push the rail (together with the fork) to the front posi-
tion. Move the rail again. It must move loosely.
10. Adjust if necessary and finally tighten the adjusting piece
nut.
11. In the same way adjust the selector fork for gears 3---4.
Note! Selector fork for gears 3---4 is easiest to adjust by mov-
ing the fork so that the groove on it is opposite the groove on
the fork for gears 1---2 when the gears are in neutral position.
12. Check the adjustment in the extreme positions, so that the
rail/fork for gears 3---4 moves loosely in these positions.
13. Adjust the selector fork for range gears
middle position and check the adjustment in the extreme
positions as above.
14. Move the fork for range LL (and fork for ground speed
PTO, if fitted) to the neutral position and make sure that the
groove on the M ---H fork is exactly opposite the groove on the
fork for range LL (gears in neutral).
Note! If the LL ---fork has to be adjusted, the tractor frame must
be split between the gearbox and fuel tank and the reverse
shuttle housing must be detached. Thus the nut at the front
end of the LL ---fork rail can be opened and the rail can be
turned.
C. Fitting the side cover
15. Make sure that the selector fork rail locking pins are in their
holes.
16. Move all selector forks to the neutral position. Apply seal-
ing compound (e.g. Silastic) to the contact surface between
the cover and the gearbox. Clean mating surfaces if necess-
ary.
17. Fit the side cover (upper end first).
18 Tighten the bolts to 50 Nm.
19. Connect the oil hoses to the cover and to the control valve.
20. Connect the cables and the shifter rods to the shifter levers
on the cover
1. 1. 1995
15. 5. 1996
21. Pour the oil into the gearbox.Test---drive the tractor and
check that the gear change mechanism functions properly.

2. Changing selector forks

Note! See also the following instructions:
--- instr. 423 2D (removing the selector forks)
--- instr. 423 4B (fitting and adjusting the selector forks)
1. Drain the oil from the gearbox.
2. Split the tractor between the gearbox and the fuel tank; see
instr. 441 1A (cab attached to the rear frame) or instr. 423 1A
(cab attached to the front frame).
3. Remove the quick ---shift gear (see instr. 441 1B) and the
reverse shuttle (see instr. 442 1A) from the gearbox front
(H ---M) in the
side.
4. Remove the gearbox side cover.
5. Remove the selector fork locking pins. Pull out the rails for-
wards and remove the forks through the side opening in the
following order:
--- fork for ranges M ---H (remove first the LL/PTO ---rail)
--- fork for ground speed PTO (if fitted)
--- fork for gears 3 ---4
--- fork for range LL
--- fork for gears 1 ---2
6. Fit the forks in the reverse order.
Note! The rail, fork and the locking pin for gears 1---2 must be
fitted before other parts are fitted into the gearbox. In addition,
the fork for ranges M ---H must be fitted onto the sliding coup-
ling before fitting the rail for range LL (and ground speed PTO
(if fitted))
Sliding pieces on the selector forks
(see picture 16 on page 420/15).
With effect from tractor ser. no. 661937, the selector forks and
the plastic sliding pieces have been changed. In connection
with possible repair works, new forks and sliding pieces must
be fitted.
Note! In connection with repairs the earlier forks and sliding
pieces must be changed into new ones in spite of the condi-
tion of the earlier parts.
Forks 1 ---2, 3 ---4, M ---H and F ---R have each 4 pcs sliding
pieces and they are all similar (spare part number 32888200,
16 pcs).
Fasten the sliding pieces on the forks with a little grease dur-
ing fitting.
Also the later AVO and LL forks have sliding pieces.
Note! The reverse shuttle fork F ---R is different on tractors
2433
which have a 2 ---speed quick ---shift gear or the Delta Power-
shift. Changing the shuttle fork, see under code 442.
704
Model Code
421
6000-- 8750
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