Great-plains 1625AHL Operator Manual User Manual download pdf (Page 33)

Great Plains Manufacturing, Inc. Table of Contents Index Operating Instructions 29

2014-04-21 Table of Contents Index 411-020M

Raising/Lowering Planter

The planter mainframe raises and lowers independently

of the tongue.

• The planter may be fully raised at any time (and must

be raised for folding).

• The planter may be lowered onto its transport lock

channels at any time.

• The planter may be fully lowered, with lock channels

removed, only when unfolded.

Refer to Figure 18

Leave or set the Hydraulic Selector Marker/Fold switch to

center/OFF or “MARKER” position to prevent

unintended folding.

Raising Planter

The planter may be raised at any time.

1. Move the Lift circuit lever to extend the lift cylinders.

2. Install lock channels if raising for transport, parking,

storage, adjustments or maintenance.

Note: After every few hours of operation (or earlier, if

uneven lift is observed), re-phase the lift circuit.

At a lift operation, hold the circuit in Extend for

30 seconds.

Lowering Planter

If lock channels are installed, the planter may be lowered

at any time. if lock channels are not installed, lower only

when unfolded.

Install lock channels (page 24) as appropriate for next

activity.

1. Move the Lift circuit lever to retract the lift cylinders

until settled on lock channels or fully lowered to

ground.

2. Set the lift circuit to Neutral for ﬁeld operation.

Note: Unless lock channels are installed, fully lower the

planter only when fully unfolded. Lowering when

folded is prevented by the transport locks.

Re-phasing Lift System

Over a period of normal use the cylinders may get out of

phase. This will cause some planter sections to run

higher than others. If this is the case, it will be necessary

to re-phase lift cylinders.

Note: Lift cylinders can only be re-phased when planter

is unfolded.

To re-phase cylinders:

1. Raise the implement completely and hold the

hydraulic remote lever on for several seconds until all

cylinders are fully extended. Do this every

8 to 10 times you raise planter out of ground.

2. When all cylinders are fully extended, momentarily

reverse hydraulic remote lever to retract system

13 mm (

⁄

inch) to maintain levelness.

Lowering Planter Hazard:

Use transport locks. A raised planter slowly lowers when held

up solely by circuit Neutral. Anyone beneath the row units

could be trapped and injured. Rely on circuit neutral to hold

the planter raised only for brief periods, such as ﬁeld turns

and during lock channel installation. Use lock channels at all

other times.

Crushing Hazard:

Keep all persons away from frame sections during lift and

lower. Area under row units is particularly dangerous. Sharp

coulter and opener blades descend with hundreds of pounds of

down-force.

Figure 18

Hydraulic Selector Switches

34522

36230

O M

1 2 ... 28 29 30 31 32 33 34 35 36 37 38 ... 175 176

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Great-plains 1625AHL Operator Manual User Manual Page 33

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