Great Plains 3S-4010HDF Operator Manual - Manual (Page 24)

20 3S-4010HD and 3S-4010HDF Great Plains Manufacturing, Inc.
196-522M 03/28/2012 E
Raising and Lowering (Lift)
The drill Lift function is used only when the drill is
unfolded. The drill must be fully lifted and locked when
folded.
When unfolded, the lift function is used for headland
turns, adjustments and maintenance, and in preparation
for folding.
Raising
1. Operate the tractor lever for the Lift circuit to fully
extend the lift cylinders. Set lever to Neutral to hold
at lift. If raising for turns or short field moves, lift is
complete.
2. If lifting for adjustments, maintenance or in prepara-
tion for Fold, install lift locks.
FigureSpacer:
Lift Locks
Refer to Figure 16 and Figure 17
3.
Remove lock channels from storage locations on the
rockshaft.
4. Install lock channels over extended lift cylinder rods.
Six cylinder rods total.
Lowering
Lower drill only when fully unfolded.
1. Extend lift cylinders to fully raised (in case cylinders
have settled against lock channels). Set circuit lever
to neutral.
2. Remove lock channels and stow them at their stor-
age locations.
3. Retract lift cylinders and fully lower drill.
Re-phasing Lift System
Over a period of normal use the cylinders may get out of
phase. This will cause some drill sections to run higher
than others. To re-phase cylinders:
1. Raise the drill completely and hold the hydraulic
remote lever on for several seconds until all cylinders
are fully extended. Do this every 3 or 4 times you
raise drill out of ground.
2. When all cylinders are fully extended, momentarily
reverse hydraulic remote lever to Retract height
1 ⁄
2
in
(6.3cm) to maintain levelness.
FigureSpacer:
Figure 16
Rear Lift Cylinder Lock
20264
FigureSpacer:
Figure 17
Rockshaft Lock Channel
29081
FigureSpacer:
Figure 18
Lock Channel Storage
20268
20269