Raising, Raising: centre lift lock – Great Plains NTA2007 Operator Manual User Manual
Page 45
Great Plains Manufacturing, Inc.
Operating Instructions
41
2012-01-05
166-372M
Raising
Equipment Damage Risk:
Raise the implement for folding and unfolding. If lowered,
inside wing openers drag or dig sideways during fold/unfold,
and damage is likely.
Equipment Damage Risk:
Always raise the implement for tight turns and reverse/backing
operations. Backing with openers lowered causes row unit
plugging, and may cause opener damage. Tight turns with
openers lowered may damage openers near the turn centre.
Equipment Damage Risk:
On tractors with electronic timer controls for hydraulic
circuits, lift timers must be set to no more than 2 seconds
longer than needed to fully raise drill. To reduce oil heating
and system wear, Do Not Set for Continuous Mode.
Regulatory Requirement:
Unless the gauge wheels are in the lowered (tucked) positions
when the drill is folded, the drill may not meet transport
clearance requirements that apply to your operations.
1.
Make sure all persons are clear of opener sections.
2.
Activate dedicated Lift circuit (normally Extend).
Refer to Figure 31
3.
Extend cylinders until all sections are raised. Hold for
a few seconds to re-phase cylinders.
4.
Set circuit to Neutral to temporarily hold sections at
raised.
Raising: Centre Lift Lock
For convenience during field turns, the centre section lift
lock does not automatically engage during lift. The lock
does automatically engage during full fold. To engage the
lock without folding, follow these additional steps:
Refer to Figure 32
5.
Verify that all persons are safely clear of implement
sections.
6.
Have an observer stand where the observer can see
the lock cylinder, and the tractor operator can see
the observer.
7.
Press “Enable Fold” softkey on seed monitor.
8.
Activate the Fold circuit for folding (typically Retract).
Hold at fold until the observer signals that the lock
cylinder has extended. The lock cylinder normally
extends early in the fold cycle.
9.
Gradually move the Fold circuit to neutral, to allow
any wing folding to reverse, by not cause the lock
cylinder to retract.
10. Lower the implement until stopped by the lock. This
also prevents the lock from releasing. Set the Lift
circuit to neutral.
Note: Gauge wheel lock channels are provided to hold an
unfolded implement at the fully raised position, for
maintenance only. These channels are an
important safety feature for maintenance, but are
not used in normal operations.
Figure 31
Implement Lowered / Raised
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Unfolded Lift Lock: Wing Pinch and Crushing Hazards:
The lift lock prevents the centre section from lowering, but only
hydraulic oil prevents wings from lowering at the tips. Use
maintenance locks to hold wings raised for extended periods.
See page 110.
Figure 32
Lift Lock Engaged
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