Great Plains 3SF45 Operator Manual - Manual (Page 20)

4/8/99 3-2
170-062M
BASIC DRILL OPERATING PROCEDURES (CON’T.)
The lift cylinders may after a period of time get out of time
or phase. The effects of this can be seen when one side
of the drill is running too low or too high because its lift cyl-
inder is either overextended or not retracted compared to
the other lift cylinders.
To rephase the cylinders, raise the drill completely up and
hold the tractor hydraulic lever on for a few seconds to
give the cylinders time to rephase. This should be done
each time the drill is raised out of the ground. Momentarily
reversing the hydraulic lever immediately after rephasing
to allow the cylinders to retract about 1/2" will help in
maintaining a level drill.
NOTE : Understand that having the cylinders become
gradually out of time is different than having air trapped in
the system from improper bleeding. Each condition is cor-
rected differently.
LIFTING GAUGE WHEEL ADJUSTMENTS:
This folding drill is equipped with rephasing-type hydraulic
lift cylinders. In order to keep your drill boxes level from
end to end, raise your drill ALL the way each time when
lifting. This will insure that your master and slave cylinders
do not get out of sequence.
Each master cylinder on each drill box has a hydraulic
depth control stop mounted on it. Set the depth stop so
that the cylinder stroke is controlled to allow your drill to
run level in the field or slightly tipped forward. This will in-
sure easy removal of the floating top link pin.
There is also a threaded eye-bolt adjustment at the top of
each slave cylinder, Fig. 7. This can be threaded in or out
to level the drill boxes from end to end. Once desired set-
ting is achieved, tighten nuts on top and bottom of tube
sleeve. For detailed instructions on " Leveling The Drill "
refer to page 6-4.
LIFTING
10066
Threaded Eye Bold Adjustment
Fig. 7