Great Plains 3N-4025P Operator Manual - Manual (Page 145)

Great Plains Manufacturing, Inc. Table of Contents Index Maintenance and Lubrication 141
2014-01-29 Table of Contents Index 196-538M
Chain Tension
Refer to Figure 190
The seed meter drive has a spring-loaded idler which
requires no adjusting. However, chain stretch may make
it necessary to shorten the chain.
For best chain tension the recommended vertical
distance between chain idlers should be not less than
1 ⁄
4
in and not more than
1 ⁄
2
in (
1 ⁄
4
in to 1
1 ⁄
4
in for 25 series).
This measurement should be taken with opener arms
horizontal.
Note: The front idler should be below the rear idler. Be
sure chain is installed with the chain connector link
retainer towards the centerline of the opener and
the clip opening (split end) faces the opposite way
of the chain travel.
Figure 191
Seed Meter Chain Idlers
22528
rear idler
arms
horizontal
front idler
Figure 192
Chain Travel
19598