Great Plains UT5052 Operator Manual - Manual (Page 30)

Section 2: Hydraulics Great Plains Mfg., Inc.
Series I UT3030-UT5052 Ultra-Till 576-026M 3/5/2008
28
3030 Ultra-Till Hydraulic Down Pressure Preparation and Setup
Note: This setup procedure is for tractors with closed-center or pressure
compensated flow hydraulic systems. Open center hydraulics not supported.
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 1,400 psi. Never exceed
1,600 psi.
5. While watching pressure gauge, slowly open
valve knob (1) until gauge reads 1,300 psi.
Pressure might rise and then fall off as knob
is opened. If pressure exceeds 1,600 psi
during this step, the tractor flow is too high,
reduce tractor flow. Lock valve knob (1) at
1,300 psi.
6. Finally adjust valve (2) to the desired wing
down pressure setting of 400 to 800 psi.
Never exceed 1,000 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.
8. Caution: Never leave tractor valve
centered when unfolded with
machine in motion. Machine
damage may occur when wings flex
up or down (see page 91).
Figure 1
!