Pressure sleeve
656
Model Code Page
41. Hydraulic coupling
1. 1. 1995
6000--8750 411 8
15. 6. 1992
Hydraulic coupling (Transfluid)
(fitted on Valmet tractors from serial number 658206 up to
serial number 666065)
A. Disassembling hydraulic coupling
1. Split the tractor at clutch (see instr. 411 1A). Remove the
mechanical clutch. Do not detach yet the clutch attaching
plate.
2. Unscrew the oil draining plug and drain the oil from the
coupling into a suitable vessel.
3. Unscrew the bolted joint between flywheel---coupling on
the coupling outer edge.
A
4. Detach the hydraulic coupling with an extractor according
to the figure above. Position extractor legs behind the clutch
attaching plate and place a suitable support bar inside the
coupling.
5. Remove the large o---ring. Remove the attaching plate of
the mechanical clutch. Unscrew the pump wheel bolts A (12
off).
6. Remove the pump wheel and the gasket from its flange.
Release the turbine wheel circlip at the front end of the coupl-
ing hub.
7. Place the turbine wheel on a support and press the hub out
from the splines.
Note! On the splines there is locking fluid Loctite 601.
8. Remove the spacer ring in front of the bearing.
9. Place the hub on a support and press the hub out from the
bearing housing.
10. Remove the bearing circlip, bearing and the seal behind
it.
11. Check the smaller bearing in the flywheel and change the
oil seal in the flywheel. Change all rubber seals. Check also
the ball bearing inside the hub rear end.
12. Clean all seal and bearing locations. Remove remaining
locking fluid from the turbine wheel and hub splines.
13. Clean every parts thoroughly and change worn parts.
Apply EP grease onto the rubber seals.
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