746
Model Code Page
6250--8950
16B440
44. DPS, shuttle, 4WD clutch
1. 8. 2000
1. 11. 1998
HiTech
Picture 7B. Lubricating system in HiTech tractors
1. Distribution piece
1a. Valve 0,25 MPa (2,5 bar), ealier 0,4 MPa, determines the
lubr. oil pressure. The pressure was earlier 0,4 MPa
(---K41106). This modification improves the lubr. oil pressure.
This pressure drop has been made so that the valve spool(1a)
has been lenghtenedabout 4 mm. Valve spring isthe same as
in valve 2a
1b. Fixing nut of the distribution piece.
Observe, that the o---ring must remain in the thinned part of
the distribution piece (not between threads).
1c) Test point, lubr. oil pressure. Fittend on the rearmost pres-
sure filter, J26434---.
2. Valve body
2a. Pressure limiting valve 0,3 MPa (3 bar) determines the
max. pressure in return oil circuit.
2b. Return oil connection for front loader.
3. Return oil filter.
4. Return oil connection for auxiliary hydraulics.
5. Lubr. oil to DPS and shuttle. Oil flow into the shuttle has
been reduced with a restriction (diam. 5 mm) (K41107---)
6. In the servo valve block, in the gearbox lubr. oil pipe, there
is a valve of 0,05 MP a, which ensures lubr. oil to DPS and
shuttle, if pressure drops below 0,05 MPa:n.
7. Oil from control valve (Bosch)
8. Oil from valve blocks
9. Pressure filtre in low pressure circuit
10. Lubr. oil pipe to the PTO clutch (J26434---).
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