981
Model Code Page
64. Powered front axle
8. 11. 1990
6000--8750 644 1
Differential (Op. no. 644)
1. Reconditioning differential
A. Changing pinion shaft seal ( without re-
moving the front axle)
1. Drain the oil from the differential. Remove the protective
shield and unscrew the propeller shaft front flange joint.
2. Unscrew the pinion shaft nut and remove the spacer ring
and shims which are under the nut. Pull the drive flange off
the shaft.
3. Pry out the oil seals and fit new seals (tool ETV 893600 can
be used to facilitate fitting the seals). Fill the space between
the lips of the seal with universal grease).
4. Check the drive flange o---ring and change if necessary.
Grease the o---ring.
5. Fit the drive flange, shims (use the same shims) and the
spacerring ontothe shaft.Tighten thenut to250 Nm. Connect
the propeller shaft flange joint (35 Nm). Fit the protective
shield.
6. Fill the differential with oiland test---run the tractor.Check for
possible leakages.
B. Changing differential friction disc
1. Raise the front end of the tractor and support it with sturdy
trestles. Drain the oil from the differential housing.
2. Disconnect the tie---rod from the steering arm on the side
with the shorter axle section.
3.Pulltheaxlehousingsectionapartoncetheboltshavebeen
unscrewed. Remove the differential unit from the axle hous-
ing..
4. Unscrew the bolts holding the differential carrier. Knock off
the crown wheel and remove the locking pins.
N.B. Mark the halves of the differential carrier to facilitate reas-
sembling.
5. Open the carrier and remove the various components.
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