772
Model Code Page
442. Reverse shuttle
6000--8750 442 2
1. 1. 1995
15. 5. 1993
B. Changing synchromesh unit/reverse
shuttle bearings
1. Unscrew the plug for the selector fork rail locking ball and
spring and remove the spring and ball.
3. Tap out the selector fork locking pin. Pull out the selector
fork rail (s elector fork remains in place) .
4. Remove the smaller c irclip at the input shaft front end.
5.Knockattheinputshaftfrontendandremoveallthree
shafts from the housing. Remove also the selector fork sliding
pieces.
6. Change, if necessary, the layshaft and reversing shaft ball
bearings.
7. If you change the reversing shaft rol ler bearing, its inner
race can be removed from the shaft by warming it up.
8. Check the condition of the synchromesh unit and change
worn parts.
Note! The synchromesh unit is assembled as follows:
--- place the sliding coupler on a flat surface.
--- fit springs and shoes onto the hub, press them inwardsand
place the hub into the sliding coupler, so deep that the parts
are held in place.
--- Fit separately three balls on the springs. Press the ball in-
wards and push the parts inside thesliding couplerso that the
ball is held in place.
---when all balls are in place, finally push the hub into the slid-
ing coupler.
Note! Measure the synchronizing ring wear by putting the
ring onto the tapered part of the coupling gear.Then measure,
how deep the ring is pressed. Clearance between the ring and
the gear on the new synchromesh unit is 1,65 ---2,20 mm.
Min. allowable clearance is 1 mm.
9. Remove the circlip of the input shaft front ball bearing and
remove the bearing.
Note! Fit a new bearing after the reverse shuttle housing has
been attached to the gearbox.
Note! The reverse shuttle shafts can be fitted back into the
housing, but t he reverse shuttle is easier to fit if the shafts are
fitted first onto the gearbox front side and after that the hous-
ing.
10. If you change the input shaft roller bearing, the inner race
can be removed from the shaft by warming it up. Fit a new
bearing fully home into its location on the housing .
Note! On the latest reverse shuttles, there is a loosemetal ring
between the input shaft bearings, see pictureon page 440/18
point 8. See also picture on page 440/19.
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