977
Model Code Page
64. Powered front axle
8. 11. 1990
6000--8750 643 1
Hub reduction gear (Op. no. 643)
1. Repairing planetary gear
A. Chang ing planetary pin ion roller bear-
ings
1. Raise the front end of the tractor and support the tractor
frame. Remove the front wheel on the side requiring repair.
Drain the oil from the hub.
2. Unscrew the planetary gear housing screws and pull the
housing off the axle.
3. Remove the planetary pinion shaft circlips.
4. Pull off the shafts using a screw (M8). The fitis notparticular-
ly tight.
5. To remove the gears, first move two from the outside, after
which the third one can be removed through the middle. Re-
move all the gears in the same way.
6. Remove the old bearing rollers from the gears.
7. Fit new bearing rollers (rollers are changed as a complete
set) and apply grease to the rollers so that they are held in
place on the gears. Fit the outer spac er rings against the
rollers.
8. Firstfit the two gears carefully throughthe middleholeofthe
retainer and position them against the housing. Then fit the
third gear into place thr ough the middle hole.
N.B. Check that the rollers and spacer rings are correctly posi-
tioned before fitting the pins.
9. Push the pins into place and fix them with circlips.
10. Chec k the o---ring on the planetary gear housing and
change if necessary. Fit the planetary gear onto the steering
knuckle and tighten the bolts to 70 Nm.
11. Fit the front wheel (550 Nm). Fill the hub with oil and tes-
trun the tractor.
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