1215
Model Code Page
90. Hydraulic system
1. 11. 1998
6000--8750 910 9B
15. 5. 1996
Hydraulic s ystem, 660071---
The new system is shown in picture 2A on previous page.
The servo valve block has been changed with effect from trac-
tor ser. no. 660071. At the same time the hose between the
valve block and the priority valve has been removed (and also
the non---return valve, see ref. 8 in picture on page 910/8).
1. Oil tank
2. Suction strainer (125 m)
2a. Pressure---limiting valve 0,2 MPa
3. Double pump 23,5+6,4 cm
3
/r (---658899) or 25+8 cm
3
/r
(658900---). i=1,32)
4. Pressure---limiting valve 23 MPa.
5. Pressure---test point (Valmet HPR)
6. Pressure filter (degree o f separation: β10=75).
--- by---pass valve 0,35 MPa.
6a. Warning light sensor, blo cked pressure filter (option)
7. Priority valve
Note! On 8050---8750 tractors the priotity valve is the larger,
OLS 120. On other models OLS 80.
8. ---
9. Steering valve (125 cm
3
/r).
--- p re s su re --- l im i t in g va l v e 1 4 M Pa
10. Steering cylinder
13. End plate (oil inlet side)
--- p re s su re --- l im i t in g va l v e 1 9 M Pa
19. Hydraulic lift control valve (Bosch)
--- s h oc k v al v e 20 MPa
20. Lifting cylinder
21. Lifting cylinder+transmission housing breather filter
(degree of separation: β10=75).
23. Servo valve block (safety valve 0,4 MPa + pressure---limit-
ing valve 1,8 MP a)
36. Return oil connectio for auxiliary hydraulics.
37. Oil cooler
38. Note! From ser. no. F13130 incl. the tractors have a pres-
sure filter also in the low pressure circuit. The filter mainten-
ance intervals are the same as for the pressure filter in working
hydraulics
Thefunctionofthehydraulicsystemisthesameasearlier,see
page 910/9.
Picture 2B. Warning light sensor, blocked pressure filter
(option).
Note! The function of the sensor can be tested by pushing the
sensor pin with power of 13 kp, at which time a bulb connec-
ted to the sensor should light.
Note! On HiTech models there are three pressure filters (one
in working hydraulics and two in low pressure side) and all ha-
ve the indicator lamp switch. By disco nnec ting the switch wi-
rescanbetested,whichoneofthefiltersisblocked.
To Next Page
Loading...
