M0258-01Model 3500
2-18 9/14
TM
Machine Operation
WRAP SPRING WRENCH
Chain idlers use wrap spring wrenches to release and adjust transmission chain tension.
NOTE: Wrap spring wrenches are L.H. and R.H. specific. L.H. styles have silver metal or grey plastic release
collars. R.H. styles have gold metal or blue plastic release collars.
Rotate wrap spring wrench knurled collar while rotating chain idler away from chain to release chain tension.
Rotate chain idler into chain while rotating handle to tension idler spring.
Release chain tension
Increase chain tension
CONTACT WHEEL DRIVE SPROCKETS
NOTE: 15 tooth, 19 tooth or 30 tooth drive sprockets at each contact drive wheel can be interchanged from
sprocket storage rod bolted to each transmission. 30 tooth sprockets require use of 124 pitch chains instead
of standard 116 pitch No. 40 chains.
Chain tension is controlled by a spring-loaded sprocket idler. Amount of spring tension on chain is controlled by idler
arm. Planting rate chart in Rate Chart section will aid you in selecting correct sprocket.
NOTE: 15, 19, and 30 tooth drive sprockets are NOT applicable to all rate charts. 23 tooth driven sprocket at
reverser plate is changed to a 17 tooth sprocket when using 60 cell soybean seed disc. Check chart titles to
ensure proper rate chart is selected.
NOTE: Make a field check after each sprocket combination adjustment to be sure you are planting at desired
rate.
Contact wheel drive sprocket
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