GREAT PLAINS SPARTAN II, Operator'S Manual, Page: 67 / 131

Great Plains | 166-486M | 2020/10/08 60
Spartan
II
607 Table of Contents Index Operation
1. Release the lock ring (1) on the bypass valve (2).
2. Turn the knob on the bypass valve (3) all the way
clockwise to the closed position.
3. Tighten the lock ring.
4. On the tractor, turn the flow on this circuit down to
no more than 45.5 liters/min.
5. Engage the tractor hydraulics to the weight
transfer circuit. Lock the hydraulic lever on the
tractor for continuous operation.
6. Adjust both weight transfer circuits so the gauges
are at 124 bar (1800 psi).
7. While watching the gauges on the drill, slowly
turn the knob on the bypass valve
counterclockwise. Adjust the bypass valve just
until the needles on the gauges begin to move
down from 124 bar (1800 psi). Lock the bypass
valve at this setting.
As the pressure increases, the cart will
raise off the ground.
8. Adjust the pressure - control valves on the drill to
the desired weight transfer circuit pressure as
explained in “
Weight Transfer Operation ” on
page 58.
Set the bypass valve as low as possible while
staying at least 21 bar (300 psi) above the
weight transfer circuit setting.
Tractor Damage Risk
The higher the bypass pressure, the
greater the potential for oil heating and
tractor damage.
While 124 bar (1800 psi) is a good starting point for
setting the bypass valve, if you consistently operate
the drill with low weight transfer circuit pressure you
can set the bypass valve below 124 bar (1800 psi). If
you consistently operate the drill with very high
weight transfer circuit pressure, you may need a
bypass
- valve setting above 124 bar (1800 psi).

Wing Leveling Eye Bolts
Wing tip tool bar height is normally set by the wing lift
cylinders. These are rephasing cylinders operating
as slaves to the center section (master) lift cylinders.
The master cylinder lowering limit is set by spacers.
If the wing tip tool bar height is not the same as the
center section tool bar height, make these checks
before considering any adjustment to the eye bolts:
1. Make sure the lift system hydraulic movements
are smooth. If there is any air in the system, the
wing heights may not track the center height (or
each other).
2. Check tire inflation.
3. Make sure weight transfer is properly set for
conditions. If the wing gauge wheels are off the
ground (or nearly so), there may be too little
weight transfer. If the center section is running
high, and the wing ends are low, there may be
too much transfer.
4. Check the current eye bolt setting.
Before any adjustment, make sure the eye bolt
setting is at the factory-recommended setting.
The distance (A) from the base of the cylinder lug
tube (1) to the flat top of the eye bolt lug (2) is
factory-set to 57 mm
.
To adjust the gauge wheel height:
5. Unfold the implement on flat ground. Fully raise
the implement.
6. Loosen the jam nut (3).
7. Set the gauge wheel height with the adjust nut
(4). Adjust until the opener tool bar height at the
wing tip is the same as center opener tool bar
height.
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38334
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