Great Plains NTA3007 Operator Manual - Manual (Page 46)

42 NTA907 or NTA3007 Table of Contents Index Great Plains Manufacturing, Inc.
166-371M Table of Contents Index 2012-07-02
Lowering and Raising Drill
Lowering/Raising Safety Information
Crushing Hazard During Lowering:
Stay clear of wings and openers during raising and lowering.
Opener sections, in addition to being extremely heavy, are
forced down with hydraulic pressure. Coulter and opener discs
are sharp. During lowering, openers will cut or crush anything
beneath them, and can cause death or serious injury.
Crushing Hazard While Raised:
Fully lower openers when working above or beside them.
Use blocking or stands when working under openers.
Raised wing openers are held up only by hydraulic pressure.
With wings tilted down, openers will slowly lower over time.
They may lower more rapidly if the hydraulic system is
damaged. They will lower rapidly if the hydraulics fail, or if
the lift circuit is set to Float or Retract.
Ground Contact Risk:
Do not lower openers while any drill folding operations are
under way or partially complete.
Note: The lift (raise/lower) circuit is also the hydraulic
down-pressure circuit. Hydraulic down-pressure
only functions as intended if the transport locks are
set to FIELD (page 39).
Lowering
1. Unfold drill before lowering (page 34).
2. Make sure all persons are clear of opener sections.
3. Actuate dedicated lift circuit (normally Extend).
4. If down-pressure has been adjusted (page 101),
leave the circuit in Extend.
If down-pressure has not been adjusted, or if not
planting immediately, set the circuit to Neutral.
Note: After unfolding, the centre section openers may be
resting in the transport hooks, despite the lock
handle being set to FIELD. You may need to raise
the openers before lowering them, to allow the
spring-loaded hooks to swing to FIELD position.
Lower: Hydraulic Circuit Operation
Lift
Fan,
Auger
Fold, Tilt,
Marker
Transport
Hooks
Extend - Neutral Neutral