Great Plains 2SNG30 Operator Manual - Manual (Page 27)

8/17/2006 202-499m
25 Operating Procedures
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 side of the drill is running too low or too
high because its lift cylinder is either overextend-
ed 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 hy-
draulic lever immediately after rephasing to allow
the cylinders to retract about 1/2" will help in main-
taining a level drill.
Note: Understand that having the cylinders be-
come gradually out of time is different than having
air trapped in the system from improper bleeding.
Each condition is corrected differently.
Unfolding
!
CAUTION
This drill has a negative tongue weight when unfolded
and raised. Be certain that the drill is hitched securely
to your tractor draw bar 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 neu-
tral.
2. Be aware of the clearance requirements of
the unfolding drill. Allow plenty of room to un-
fold and do not allow anyone in the area of the
drill when unfolding.
Refer to Figure 17
3. Remove pin from pull bar transport lock.
4. Slowly unfold the drill using the hydraulic cyl-
inders. 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 un-
folded carelessly.
Refer to Figure 18
5. Apply hydraulic pressure to the raising and
lowering system. Lowering the drill may be re-
quired to free up the transport lock pins in the
vertical tubes for removal. Place pins into
storage position.
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Figure 17
Pull Bar Lock Pin in Transport Position
Figure 18
Pull Bar & Transport Lock Pins in Field Position