Great-plains 4000TT Operator Manual User Manual download pdf (Page 26)

22 1200-4000TT Great Plains Manufacturing, Inc.

586-201M 02/11/2014

General Operation and In-Field

Adjustments

24. Remove the transport pins, see “Transport Locks”

on page 20 and unfold machine. Make sure the fold

cylinders are fully extended to allow the wings to fully

ﬂex in the ﬁeld.

25. Set the hydraulic down pressure using the instruc-

tions, see “Bypass Valve Adjustments” on

page 25.

Never leave tractor valve centered when unfolded with

machine in motion. Machine damage may occur when wings

ﬂex. The hydraulic down pressure cylinders have no wing ﬂex

capability and oil ﬂow is required when the wings ﬂex up or

down. You must have the tractor fold hydraulic lever in contin-

uous downward ﬂow or “ﬂoat” position before the wings can

ﬂex over terrain in the raised or lower lift position.

26. If possible have someone observe the machine dur-

ing ﬁrst time operation for levelness—front to rear

and wings to center frame. Adjust each as needed.

For front to rear, either extend or shorten the length

of the turnbuckle on the self-leveling system. Never

run the machine with the back lower (deeper) than

the front. To adjust the machine from side to side,

use the lift turnbuckle on each wing

27. For best results, if at all possible, run the machine at

a slight angle to the rows. This will improve trash ﬂow

and help spread the residue more evenly throughout

the ﬁeld.

Depth Stop

Refer to Figure 14

28. When you have machine level and set to the desired

working depth, set the depth stop on the depth

stop tube . This is located at the front of the

machine. This will maintain a constant depth each

time after raising and lowering machine.One full turn

of the handle will change the depth approximately

1/4”.

Note: Slight tire to ground pressure should be maintained

to prevent cylinder pin and clevis wear. If after set-

ting the depth stop, the detent on the tractor kicks

out before the stop contacts the button on the

depth stop, slow the hydraulic ﬂow speed down. If

this problem exists, contact the factory service rep-

resentative for other possible adjustments. On trac-

tors with a timed detent setting, set the detent so

when you raise the machine, the pump will run for

1/2 to 1 full second after full raise. If it runs longer

than this, damage to the seals of the lift cylinders

may result.

Figure 14

Depth Stop Adjustment

42070

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Great-plains 4000TT Operator Manual User Manual Page 26

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