Great Plains UT3030 Disk Assembly Instructions - Manual (Page 8)

Section 2: Hydraulics Great Plains Mfg., Inc.
Series I UT3030-UT5052 Ultra Till 786-026M 3/11/2004
40
UT3030 Ultra Till Hydraulic Down Pressure Preparation and Setup
Note: This setup procedure is for tractors with closed-center or pressure compensated flow
hydraulic systems. For open-center hydraulic systems contact your dealer for instructions.
1. Adjust the bypass/pressure reducing
valve by turning knob (1), Figure 1,
clockwise all the way in and then backing
out 1 full turn.
2. On tractor, adjust flow-control valve to low
side of flow rate. NOTE: The faster the
flow of oil through the system the greater
potential for oil heating, premature wear
or tractor damage.
3. Lock the fold hydraulic lever for
continuous downward oil flow.
4. Adjust bypass/pressure reducing valve
knob (2) on implement so the pressure
gauge reads 1200 psi. Never exceed
1400 psi.
5. While watching pressure gauge, slowly open
valve knob (1) until gauge reads 1100 psi.
Pressure might rise and then fall off as knob
is opened. If pressure exceeds 1400 psi
during this step, the tractor flow is too high,
reduce tractor flow. Lock valve knob (1) at
1100 psi.
6. Finally adjust valve (2) to the desired wing
down pressure setting of 400 to 700 psi.
Never exceed 900 psi.
7. In field operation, Lock the fold
hydraulic lever for continuous
downward oil flow. If wings are
running too high, increase pressure
setting, knob (2), to level machine. If
center is too high, decrease pressure
setting with knob (2) on valve.
Figure 1