855
Model Code Page
46. Front PTO
1. 4. 1997
6000--8150 463 13
Picture 22. Cross section.
1. Elastic joint.
2. Clutch inner part
3. Input shaft
4. 1. intermediate shaft
5. 2. intermediate shaft
6. Outer casing of t he clutch
7. Intermediate discs (10 pcs)
8. Friction discs (9 pcs)
9. Clutch piston
10. Pressure springs (12 pcs)
11. Cylinder end
12. PTO shaft
13. Pump (Casappa)
14. Spacer sleeves (4 pcs). Not 4---cyl. engines
E. Reconditioning multi---disc clutch/
changing PTO shaft (detached unit)
Disassembly
1. Drain PTO unit oil. Disconnect the oil ho ses and pipes.
Remove the oil pump (hexagonal socket head 5 mm, 4
pcs) and the solenoid valve.
2. Unscrew the fixing bolts of the housing halves.
3. Tap with a plastic malle t at the PTO shaft rear end flange
(B) and at the upper drive shaft rear end, until an opening
appears between the housing halves.
4. Place the housing horizontally with the PTO shaft end
upwards and pry with two fitting levers the foremost hous-
ing half loose from the rearmost half.
Note! This work requires a little force because o f t he ten-
sion pins and bearing t olerances.
5. Tap out the PTO shaft/multi---disc clutch.
6. Remove bearing (G). Compress with a hydraulic press
thepistonspringsandreleasecirclip(H)andremovethe
support ring under it.
Note! When using the hydraulic press, the pressure sleeve
should have a hole on one side, through which the circlip
(H) can be released.
7. Remove the piston, springs and the clutch discs.
8. If the PTO shaft has to be changed, remove the gear
wheel/clutch drum by removing bearing (K) and circlip (D)
and by pulling the drum off with an extractor. Place the sup-
port ring (F) and the circlip (E) onto a new shaft. When refit-
ting the drum, tap it onto to the new shaft with a suitable
sleeve. Refit the circlip (D) and the bearing (K) and mount
the seal rings onto the new shaft.
9. Fit new clutch discs (friction discs, 9 off, and steel discs
10 off outermost) and change, if necessary, the piston
seals.
10. During reassembly, compress the piston springs and
refit the support ring and the circlip (H). Refit the bearing
(G).
Assembly
11. Check/change, if needed, the seal rings of flange (B).
Fit o---ring (A) onto the flange (B) and tap the flange into
place. Fit the flange circlip (C). Ensure that the o---ring (A) is
situated correctly in place.
12. Position the rearmost housing half horizontally on a
table and tap the PTO shaft/multi---disc clutch into the
housing so that the rear bearing (G) is pushed into the
bearing locatio n against the flange (B).
13. Place the intermediate shafts and the drive shaft
together with their bearings into the rearmost housing half
(if loo s ened) .
14. Clean the mating surfaces of both housing halves and
fit a new paper gasket (thickness 0,4 mm).
15. Position the foremost housing half on the other half and
tap the foremost housing half until the bearings are pushed
into their locations and the mating surfaces touch each
others.
16. Tighten the housing half bolts evenly to the correct
torque.
17. Refit the oil pump, the solenoid valve and reconnect all
oil pipes.
18. Fill the unit with 4 litres transmission oil (oil level must
be at the level of the filling hole lower edge).
F. Intermediate shafts
If these shafts or their bearings are t o be changed, tighten
the shaft nuts so that the bearings have not clearance and
secure the nuts with lock washers.
G. Oil seals
The PTO shaft oil seal can be changed without removing
the PTO housing. Fit a new s eal by using a suitable sleeve.
Fit the protective ring and the PTO shaft guard, if removed.
If the upper drive shaft oil seal has to be changed, the PTO
unit must be removed.
Note! If the front PTO is disas sembled and repaired, it is
reco mmended t hat the oil seals are changed.
H. Others
The pump drive sleeve in the front end of the upper shaft
has a press---fit. In additio n, locking fluid has been used.
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