859
Model Code Page
46. Front PTO
1. 8. 2000
463 13D
6250Hi--
6850Hi
Picture 25. 6250Hi---6850Hi tractors’ oil pump in the front
PTO.
1. Suction filter
2. Drive gear
3. Gear wheel pump
4. Pressure---limiting valve (20 bar), clutch pressure
5. Safety valve (6 bar)
6. 3/2 --- proportional valve
7. PTO multi---disc clutch
8. Pressure---test point
9. Into oil cooler
10. Oil cooler
The pump produces the clutch engaging pressure (20 bar)
and circulates oil through the oil cooler.
Removing pump:
--- drain oil in PTO unit
--- remove the suction filter flange snap ring (slacken first the
centre bolt).
---removetheflangeandfilter
--- disconnect prop. valve wires
--- unscrew two pump fixing screws (see picture above)
--- remove the pump from front
Note! The pump can be dismantled by opening the assem-
bling screws. The prop. valve, pressure---limiting valve (20
bar) and safety valve (6 bar) can be removed
To be observed when fitting the pump:
--- ensure that there are small o---rings round the pump pres-
sure drillings. Fix them with a little grease.
--- check all sealing rings.
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