Great Plains 2SF30 Operator Manual - Manual (Page 30)

26 2SF24/30 Table of Contents Index Great Plains Manufacturing, Inc.
155-015M-A Table of Contents Index 2014-01-09
Lifting and UnFolding the Drill
Lift Cylinders
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 cylinder 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
inch 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 corrected differently.
Unfolding the Drill
Crushing Hazard:
This drill has a negative tongue weight when unfolded and
raised. Be certain that the drill is hitched securely to your
tractor drawbar and be certain the hitch safety chain is
securely attached to the drill hitch and tractor before raising
or unfolding the drill!
1. Unfolding the drill is best achieved on level ground
with the tractor transmission in neutral.
2. Be aware of the clearance requirements of the
unfolding drill. Allow plenty of room to unfold and DO
NOT allow anyone in the area of the drill when
unfolding.
Refer to Figure 20
3.
Remove pin from pull-bar transport lock.
4. SLOWLY unfold the drill using the hydraulic
cylinders. For the first time, watch to be sure the
hydraulic hoses do not get pinched or kinked.
Serious damage could occur if the drill is unfolded
carelessly.
5. Apply hydraulic pressure to the raising and lowering
system. Lowering the drill may be required to free up
the transport lock pins in the vertical tubes for
removal. Place pins into storage position.
Figure 19
Transport Lock Pin in Field Position
17268
Figure 20
Pull Bar Lock Pin in Field Position
10730