Great Plains NTA2007HD Operator Manual - Manual (Page 39)

Great Plains Manufacturing, Inc. Contents Index Operating Instructions 35
04/04/2011 Contents Index 166-283M
Lowering and Raising Air Drill
Lowering/Raising Safety Information
Crushing Hazard During Lowering:
Stay clear of wings and openers during lowering and raising.
Wings are extremely heavy and are driven down with hydraulic
pressure. Coulter and opener disks are sharp. During lower-
ing, openers will cut or crush anything beneath them, and can
cause serious injury or death.
Crushing Hazard While Raised:
Use lift lock (page 34) and gauge wheel lock channels when
working above or beside openers.
Without locks, center section and wings are held up only by
hydraulic pressure, and slowly lower over time. They may
lower more rapidly if the hydraulic system is damaged. They
lower rapidly if the hydraulics fail, or the Lift circuit is set to
Float or Retract.
Shoving Hazard:
Air drill length changes by 56 cm (22in) during raising and
lowering. Injury is possible.
Implement casters and row units move forward during raising,
and backward during lowering. Gauge wheels move forward
during lowering. Casters may swivel. Tractor may move in
some circumstances.
Set brakes / use park to avoid tractor movement. Remain clear
of all tires and row units during raise and lower.
Equipment Damage Risk:
Do not lower while any folding or unfolding operations are
underway or partially complete. Openers can dig in or drag on
ground and be damaged.
Note: Gauge wheel lock channels are provided to hold
the wings of an unfolded implement at the fully
raised position, for maintenance only. These chan-
nels are an important safety feature for mainte-
nance, but are not used in normal operations.