Great Plains NTA3007HD Operator Manual - Manual (Page 36)

32 NTA907HD or NTA3007HD
166-207M 04/04/2011
Lowering and Raising Air 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 disks
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 dam-
aged. They will lower suddenly if the hydraulics fail, or the cir-
cuit is set to Float or Retract.
Do not lower while any air 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 27).
Lowering
1. Unfold drill before lowering (page 25).
2. Make sure all persons are clear of opener sections.
3. Activate dedicated lift circuit (normally Extend).
4. If down-pressure has been adjusted (page 85), leave
the circuit in Extend.
If down-pressure has not been adjusted, or if not
planting immediately, set the circuit to Neutral.
Null4:
Null4:
Lower: Hydraulic Circuit Operation
Lift
Fan,
Auger
Fold, Tilt,
Marker
Transport
Hooks
Extend - Neutral Neutral