Great Plains YP3025 Operator Manual - Manual (Page 107)

Great Plains Manufacturing, Inc. Table of Contents Index Maintenance and Lubrication 103
2013-09-09 Table of Contents Index 401-703M
Hopper Strap Maintenance (Option)
This applies only to the 150bu hopper. The 82bu hopper
and bulk seed boxes have no straps.
Refer to Figure 143
A new 150bu hopper requires periodic attention to the
hopper strap, as the hopper initially seats, and thereafter
due to continued hopper seating and strap stretching.
Check tension before and after filling the hopper, and
periodically during the first season. Seasonally check
tension and inspect the strap for wear and damage.
Replace if frayed or torn.
To tension:
1. Choose one end of the strap to work with (both ends
are adjustable).
2. Loosen the tensioning nut and back it off until
flush with the top of the bolt threads .
3. Cinch the strap to remove all slack.
4. Fully tighten the tensioning nut.
Chain Maintenance
Initially check the drive chains after the first 10 hours of
drill use. The slack of new chains tends to increase dur-
ing the first few hours of operation due to seating. There-
after, check the chains every 100 hours.
Lubricate chains any time there is a chance of moisture,
and when being stored at the end of the planting season.
Chain Slack
Refer to Figure 144, 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).
2. Determine the ideal slack:
Long chains (over 91cm/36in): 2.1cm/m (
1 ⁄
4
in per ft)
Vertical short chains: 2.1cm/m (
1 ⁄
4
in per foot)
Horizontal short chains: 4.2cm/m (
1 ⁄
2
in per foot).
3. 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.
4. 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 145 (arrow shows chain direction)
Install clip with open end facing away from direction of
chain travel (shown by gray or striped arrows in chain
routing diagrams).
Figure 143
Hopper Strap Tensioning
31468
1 2
3
1
2
3
Figure 144
Measuring Chain Slack
27264
2
1
1
Figure 145
Chain Clip Orientation
26482
2