FARMI 4670
25
HYDRAULICS
CONNECTION TO THE CLOSED CENTER SYSTEM
(ON/OFF, 80 l)
1. Plug the drill hole at the bottom of port T with an
R¼” plug. Move the hose going to the tank here.
2. Plug the previous hole of the tank hose with an
R1/2” plug.
Fig 4. Modifying the valve for closed center system
3. Tighten the main relief valve by ¾ turn so that its
pressure is at least 5-10 bar higher than that of the
tractor.
Before modification
After modification
Pressure P
Return T
Pressure P
Return T
Plug 1/4”
Main pressure relief valve, tighten 3/4 turns
Plug R1/2”
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