5317-5323 hydraulic down pressure – Great Plains TC5319 (S/N A1420X+) Operator Manual User Manual
Page 21
Great Plains Manufacturing, Inc.
Preparation and Setup
17
03/06/2014
566-224M
5317-5323 Hydraulic Down Pressure
Refer to Figure 13
Note: This setup procedure is for tractors with closed-center
or pressure compensated flow hydraulic systems.
Open center hydraulics not supported.Adjust down
pressure valve as shown on decal
(located on front
right hand truss), Refer to Figure 14.
Never leave tractor valve centered when unfolded with machine
in motion. Machine damage may occur when wings flex up or
down
This machine is designed for continuos hydraulic flow to the wing
fold cylinders during field operations. It is for use on tractors
having CLOSED CENTER hydraulics only. If your tractor has an
OPEN CENTER hydraulics, please consult your dealer for oper-
ating instructions.
25. Adjust the bypass/pressure reducing valve by turning
knob
clockwise all the way in and then backing out 1
full turn.
26. On tractor, adjust flow-control valve to low side of flow
rate.
Note: The faster the flow of oil through the system the
greater the potential for oil heating, premature wear
or tractor damage.
27. Lock the fold hydraulic lever for continuous downward
oil flow.
28. Adjust bypass/pressure reducing valve knob
on
implement so the pressure gauge
reads 1200 psi.
Never exceed 1400 psi.
29. While watching pressure gauge
, slowly open knob
until gauge reads 1100psi. 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
at 1100 psi.
30. Finally adjust valve
to the desired wing down pres-
sure setting. Never exceed 900 psi.
31. In field operation, lock the fold hydraulic lever for con-
tinuous downward oil flow. If wings are running too
high, increase pressure setting, knob
, to level
machine. If center is too high, decrease pressure set-
ting with knob
on valve.
.
Figure 13
5317-5323 Down Pressure
41296
2
1
4
3
U
D
F
B
L
R
4
Figure 14
Down Pressure Decal
848-390C
1
2
3
3
1
1
2
2
2
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