Great Plains 2SBM30 Operator Manual - Manual (Page 14)

2SBD30 30-Foot, Folding, Soybean Machine 173-086M 5/3/05 12 Great Plains Mfg., Inc.
Section 3 Hydraulics
Fold Hydraulics
Operating The Hydraulic System
Lifting
The lift cylinders may after a period of time get out of
time or phase. The effects of this can be seen when one
cylinder is either overextended or over retracted com-
pared to the other lift cylinders. To rephase the cylinders,
raise the machine completely up and hold the tractor hy-
draulic lever on for a few seconds to give the cylinders
time to rephase. This should be done each time the ma-
chine 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.
Unfolding
1.
Remove pin from pull-bar transport lock, Figure 3-2.
Pin must always be used when transporting the ma-
chine in the folded position.
2. Unfold boxes using hydraulic cylinders. Do this very
slowly and carefully. Serious damage could occur if
done fast and carelessly. Folding and unfolding is
best achieved on level ground. Install lock pin in bar
slide.