-X BAG0235.4 01.23
5.4.3 PTO shaft with friction clutch (optional)
The PTO shaft with friction coupling is recommended in the event of
frequent shearing of the shear bolt between the connection fork and
gearbox flange bush and for tractors with hard-mesh universal joint
shaft coupling.
Function and maintenance:
Transient peak torques of approx. 400 Nm or more—which can occur
when the universal joint shaft is switched on, for example—
by the friction clutch. The friction clutch prevents damage to the PTO
shaft and gearbox elements. Therefore, proper function of the friction
clutch must be ensured at all times. Thermal distortion of the friction
lining prevents the friction clutch from activating.
1. Use an extractor to pull the flange bushing
(Fig. 24/1) from the gearbox input shaft.
2. Clean the gearbox input shaft (Fig. 25/1).
3. Take the PTO shaft apart.
4. Remove the locking screw (Fig. 25/6).
5. Turn the PTO shaft guard (Fig. 25/2) into
installation position (Fig. 25/7).
6. Withdraw the guard half.
7. Release the lock nut (Fig. 25/3) in the con-
necting fork of the friction clutch (so that the
setscrew no longer protrudes beyond the
lock nut), unscrew the hexagon socket set-
screw (Fig. 25/4) and check that the con-
necting fork can be easily fitted on the
gearbox shaft.
8. Push the greased connection fork onto the
gearbox input shaft as far as it will go.
24
25
Make sure the feather key (Fig. 25/5)
is fully covered!
9. Secure the PTO shaft against axial move-
ment. Firmly tighten the setscrew with a
hexagon socket wrench and lock with nut
(Fig. 25/3).
10. Refit and lock the guard half and insert the
PTO shaft halves into each other.
11. Secure the PTO shaft guard against rota-
tion by attaching the chain to the machine.
Removing:
1. Release the PTO shaft guard and remove
toward the rear.
2. Unscrew the lock nuts (Fig. 25/3) in the
connection fork from the friction clutch. Re-
move the setscrew (Fig. 25/4).
3. Pry the connection fork off of the gearbox
input shaft using a flat bar.
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