Great Plains 3PNG15 Operator Manual - Manual (Page 38)

34 3PNG12 and 3PNG15 Great Plains Manufacturing, Inc.
202-553M 10/06/2008
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.
All chains are #40 roller chains.
Chain Slack
Check slack within the first 8 hours of operation and
tighten idlers as necessary.
Refer to Figure 25, 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
1 ⁄
2
in per foot of span between sprocket
centers. For example:
A slack of 1in is correct for a 24in 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. 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 26
Install clip with open end facing away from direction of
chain travel (shown by gray or striped arrows in chain
routing diagrams).
Seed Flap Replacement
Refer to Figure 27
To replace a seed flap
use a needle nose or similar
tool and squeeze the tabs together. Pull plastic seed
flap down out of metal bracket .
Push new seed flap up through metal bracket until
tabs on seed flap snap in place.
Figure 25
Measuring Chain Slack
27264
2
1
1
Figure 26
Chain Clip Orientation
26482
2
Figure 27
Seed Tube Flap
19398
3
2
1
2
1
2
1 3
1 3
2