Great Plains 4000TM Operator Manual - Manual (Page 31)

Great Plains Manufacturing, Inc. Operating Instructions 27
12/03/2013 586-537M
General Operation and In-Field Adjust-
ments
Prior to Operating the Turbo Max
11. Raise the machine fully so the lift cylinders no longer
rest on the transport lock channels , Refer to Figure 28.
Remove transport lock channels and store on the bars
above. Remove the wing transport pins
Refer to
Figure 29 and store in the spools on the wing rest bar.
Open the wing fold valve located on the bypass/down
pressure valve (Models 3500-4000). You are now ready
to unfold unit.
12. Unfold unit being sure that the fold cylinders are fully
extended. You may increase flow rates during the folding
and unfolding procedure but be sure to slow the flow
rates back down once the unit is unfolded.
13. When operating the Turbo Max with the blades running
at an angle, it is generally unnecessary to operate with
hydraulic down pressure to the wings. Only in very hard
ground will down pressure be needed. If down pressure
is needed, see “Hydraulic Down Pressure 3500” on
page 21 or “Hydraulic Down Pressure 4000” on
page 22 for initial setup. If no down pressure is needed,
set the fold hydraulic system to the "FLOAT" position at
this time.
14. When operating the blades in the straight position, down
pressure is necessary, usually between 200 and 400
psi.
Note: 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 continuous downward
flow or “FLOAT” position before the wings can flex over
terrain in the raised or lower lift position.
Hitch Turnbuckle
Note: If possible have someone observe the machine during
the initial operation for levelness - both front to rear and
center to wings. Adjust each as needed.
Refer to Figure 30
15. For front to rear, either extend or shorten the front turn-
buckle on the leveling system by loosening jam nut
with turnbuckle wrench (stored on rear pegs of hitch).
Adjust turnbuckle until level front to back. Re-tighten
jam nut after machine is level. Never run the machine
lower (deeper) in the rear than in the front.
Figure 28
Transport Locks
42066
1
2
3
1
2
3
4
5
6
Figure 29
Wing Fold
42249
43101
5
4 6
Figure 30
Hitch Turnbuckle Adjustment
42260
1
2
3
1 2
3
1
1