849
Model Code Page
46. Front PTO
1. 4. 1997
8450--8750 463 7
Picture 19. Cross section
1. Drive shaft
2. Elastic joint
3. Clutch drum
4. Hub
5. Friction piece (6 pcs)
6. Spring
7. Clutch guide pin (3 pcs)
8. Return spring (6 pcs)
9. Piston
10. Clutch cylinder
11. Pressure oil into clutch (from tractor low pressure circuit)
12. Oil inlet cover
13. Shaft
14. Intermediate gear wheel
15. PTO shaft
16. Pump (for coo l ing circuit)
17. Pump drive sleeve
18. Oil draining
19. Oil level
.
Picture 20. Front PTO on 8450---8750
1. Solenoid valve
2. Pressure oil into the PTO unit cone clutch(about
11 bar)
3. Return oil
4. Pressure oil from tractor hydraulics (18---19 bar)
5. Rocker switch of front PTO
On 8450---8750 tractors the front PTO clutch pressure is
maintained by the low pressure circuit of the tractor
hydraulic system.
Solenoid valve (1), which is located in the engine compart-
ment, directs the oil pressure to the front PTO clutch when
the switch (5) is turned. The electronic box (A15) is the
same and in the same place as on 6000---8150 tractors.
Note! The electric systems of the front PTO on 6000---8750
tractors are similar, but the wire lengths are different, since
the solenoid valves are fitted in the different places on
6000---8150 and 8450---8750 tractors.
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