Valtra 6550 - Page 1264

1207
Model Code Page
90. Hydraulic system
15. 5. 1993
6000--8750 910 7
15. 6. 1992
Hydraulic diagram, ---660070
(see figure 1 on previous page)
1. Oil reservoir
2. Suction strainer (125
m)
2a. Pressure---limiting valve 0,2 MP a (lubricating pressure)
3. Twin gear pump (23,5+6,4 cm
3
/r, i=1,32)
4. Safety valve 23 MPa. (placed in the high pressure pump).
5. Pressure test point (Valmet HPR)
6. Pressure filter (degree o f separation:
β10=75).
--- by---pass valve 0,35 MPa.
7. Priority valve
8. Non---return valve
9. Steering valve (125 cm
3
/r).
--- steering system pressure---limiting valve 14 MPa
10. Steering cylinder
11. Steering valve, reverse drive (optional)
12. Shuttle valve, reverse drive
13. End plate (oil inlet)
--- pressure---limiting valve 19 MP a (high pressure circuit)
14 . Va l v e f o r a u x i l ia ry h y d ra u l i cs , 2 /1 --- ac t ion ( o u t --- h ol d --- i n )
15. Valve for auxiliary hydraulics, 2/1--- action (float---out---
hold---in), float pos itio n can be locked)
16. End plate (tank side)
17. Valve for auxiliary hydraulics (optional), 2--- action (out---
float---in), out and in positions can be locked)
18. Valve for auxiliary hydraulics (optional), 2---action, kick---
out function (float---out---hold---in), float, out and in positions
can be locked)
19. Hydraulic lift control valve (Bosch)
--- lifting cylinder shock valve 20 MP a
20. Lifting cylinder
21. Breather filter for l ifti ng cylinders and transmission hous-
ing (degree of separation:
β10=75).
22. Brake valve for trailer (optio nal)
23. Servo valve block
--- safety valve for oil cooler 0,4 MPa
--- pressure---limiting valve for low pressure circuit 1,8 MPa
24. Differential lock
25. C ushioning valve for PTO engagement
26. PTO
27. 4WD clutch
28. Quick---shift gear
29. Reverse shuttle lubrication
30. Lubrication for bevel pinion shaft
31. Lubrication for pump drive mechanism
32. Lubrication of gearbox input shaft
33. Lubrication of differential gears
34. Lubrication of PTO unit shafts
35. Lubrication of PTO mechanism
36. Return oil connection for auxiliary hydraulics
37. Oil cooler
38). Oil flow regulator valve (Rexroth), (optional)
38a). Intermediate flange for oil flow regulator valve