Great-plains NP4000B Operator Manual User Manual download pdf (Page 59)

Great Plains Manufacturing, Inc. Table of Contents Index Operating Instructions 55

2014-05-14 Table of Contents Index 417-199M

Field Lower

These steps are for lowering in the ﬁeld after initial

line-up and after turns. Lift-assist lock channels

(page 50) are presumed to have been replaced by

spacers (page 43). The down-pressure/weight transfer

system (page 92) is presumed to be adjusted.

The key objectives for an optimal lowering are:

• avoid side loads on coulter discs or tines by avoiding

lowering with drooped wing tips, and

• avoid tine plugging by avoiding any reverse motion of

the tines at the ground.

Being in slow forward motion during lower avoids both of

these risks. The following instructions presume a

lowering while stationary.

Refer to Figure 30

1. Verify that the FOLD / FIELD switch is set to

FIELD

2. Check that wings are partially folded in ﬁeld lift, or at

least level. If they are drooping, retract the fold

cylinders to correct.

3. Lower the tractor 3-point hitch to the preset ﬁeld

height. Set the hitch circuit to Position or Depth

Control.

4. Extend the fold/lift circuit to lower the wings below

level into down-pressure mode, and to retract the

lift-assist cylinders to their spacers.

Note: You may lower the hitch and lift-assist

simultaneously, but avoid lowering the lift-assist

before the hitch.

5. Pull forward.

6. Leave the fold/lift circuit active in the lower/unfold

position, to supply oil to the down-pressure system.

Figure 30

Switch for Field Lower

34918

1 2 ... 54 55 56 57 58 59 60 61 62 63 64 ... 199 200

No comments

Great-plains NP4000B Operator Manual User Manual Page 59