Great Plains NTA2007 Operator Manual - Manual (Page 54)

50 NTA607 or NTA2007 Table of Contents Index Great Plains Manufacturing, Inc.
166-372M Table of Contents Index 2012-01-05
Meter Doors
Refer to Figure 39 and Figure 40 (shown with guards
removed - do not operate without guards)
Each meter box has two distinct access doors on the
bottom:
• On the air outlet (rear) side: Clean-Out
(for emptying hopper)
• On the air inlet (front) side: Calibration
(for meter sampling and meter clean-out)
The doors are closed during transport, loading and
planting. They may be open slightly in storage to allow
drainage of condensation.
The doors need to close and seal tightly during planting.
Periodically inspect the lever clamps for proper tension,
and inspect the elastomer seals for integrity and
resiliency.
Meter Door Opening
1. Lower the meter chute. Push the latch back
(toward cart centre). Pull the outside end of the
chute to the outside and down.
2. There are two interconnected clamp handles on
each door. Pull out on a clamp handle
. The door
normally swings down on its own. If not, pull it open
by hand.
Meter Door Closing
Make sure the clamp handles are out or down (not up),
or it will not be possible to close the door.
1. Use a clean rag to wipe any residual material from
the face of the elastomer seals on the door, and from
the bottom face of the meter box.
2. Swing the door up into closed position.
3. While holding the door closed, swing the clamp
handles up, until the toggle arms are past vertical.
4. Inspect the door closure for possible air leaks.
Replace any deformed elastomer seal or damaged
latch clamp.
5. Raise the meter chute. Pull it away from cart centre.
Engage the latch handle under the washer.
Material Loss / Air leak Risks:
Do not open the clean-out door (the rear door at the air outlet
side) until preparations have been made to capture any
material to be re-used. Any material present will flow
immediately, possibly in large volume, as soon as the door is
open. It is not possible to close the door with an adequate air
seal, until the hopper is empty.
Figure 39
Meter Doors Open
31161
1 2
3
3
4
1
2
4
3
Figure 40
Meter Doors Closed
31158