Great Plains NTA2007HD Operator Manual - Manual (Page 109)

Great Plains Manufacturing, Inc. Contents Index Maintenance and Lubrication 105
04/04/2011 Contents Index 166-283M
Maintenance Lift Lock
Crush and Pinch Hazards; Equipment Damage Risk:
Do not rely on hydraulics to hold the implement at lift. Use the
maintenance lift locks provided. Unlocked lift cylinders settle
over time. Implement sections can crush anyone working
under them. Implement links can pinch or crush anyone work-
ing near them.
Do not rely on the transport lift lock to hold the wings at
raised. Use the gauge wheel lock channels provided. Unlocked
gauge wheel cylinders settle over time. Outer wing openers
can crush anyone working under them. Openers at wing gaps
can pinch anyone working between them. Opener damage is
also possible.
Locks, including gauge wheel cylinder locks, are pro-
vided to hold all implement sections at raised for mainte-
nance, and for raised unfolded storage. The gauge wheel
lock channels are not used in routine operations (field or
transport).
Steps to engage maintenance lift lock presume a starting
configuration of implement unfolded and lowered:
1. Raise the unfolded implement.
Refer to Figure 89
2.
Install the gauge wheel lock channels. Remove the
channels
from the wing lugs and pin to cylinder
rods .
Refer to Figure 90
3.
With the implement still fully raised, begin a fold
operation (page 33) just long enough to cause the
center lock cylinder
to extend and engage the
center lock lug .
4. Lower the implement.
Maintenance Lift Unlock
1. Raise the implement.
2. Remove the gauge wheel lock channels. Return
them to storage.
3. To lower, Perform an unfold operation (page 31) just
long enough to disengage the center lock.
To fold, leave the center lock engaged, and complete
a fold operation (page 33).
Null4:
Figure 89
Maintenance Lock Channel
31415
1
2
3
Null4:
Figure 90
Center Lock Engaged
31248
4
5
1 2
3
1
1