Great Plains 1005NT Assembly Instructions - Manual (Page 25)

06/02/2008 123-535M
Great Plains Manufacturing, Inc. Maintenance 23
Maintenance
Small Seeds Box Cleanout
1. Open lid of each box and scoop out as much seed as
possible.
2. To recover remaining seed, place a collection tarp
under the small seeds tubes at the openers.
3. Raise drill.
4. Set seed rate handles to 100.
5. Rotate gauge wheels until no seed flows.
6. If a vacuum cleaner is available, remove any residual
seed from top of meters.
Chain Maintenance
Inspect and lubricate chains regularly. The slack of new
chains tends to increase during the first few hours of
operation due to seating.
Chain Slack
Check slack within the first 8 hours of operation and
adjust idlers as necessary.
Refer to Figure 21, which, for clarity, greatly exaggerates
slack, and omits the idlers.
1.
Measure the span for allowable slack:
Locate the longest span of each chain (usually the
span which does not run through the idlers). The
ideal slack is between 2% and 4% of the span.
For example:
A slack of
1 ⁄
2
in is appropriate for a 17in span.
2. Measure the current slack :
Acting at a right angle to the chain span at the center
of the span, deflect the chain in both directions with a
force of about 9 lbs (4 kg). The slack is the distance
of the movement.
3. Adjust the idlers for ideal slack.
Whenever mounting a chain, make sure the clip at the
removable link is oriented to minimize snags.
Refer to Figure 22
Install clip with open end facing away from direction of
chain travel (shown by gray arrows in chain routing dia-
grams).
Figure 21
Measuring Chain Slack
27264
2
1
1
Figure 22
Chain Clip Orientation
26482
2