Planters have multiple chains and drive systems that benefit from regular inspection and maintenance. Here are four tips for this spring.
1. A planter drive chain that jerks when its shaft turns may be corroded or just plain worn out. But it’s possible the chain’s sprockets are worn and hooked. Be sure to check smaller sprockets that turn faster than their larger counterparts.
2. Release chain tension and check all small 8-, 10-, or 12-tooth idler sprockets to make sure they spin freely. Also make sure all idler sprockets are aligned with their associated drive/driven sprockets. Those small idlers are often overlooked when searching for chain problems that reduce metering accuracy.
3. Be sure spring-loaded arms that support idler sprockets move freely. Gunk and wear can freeze or restrict the movement of the spring-loaded arm on those sprockets so they can’t keep consistent tension on chains.
4. It’s not hard to fabricate a turning tool to rotate driveshafts and lube and check chains for kinks. A 7/8” socket affixed to a small, short stub shaft, chucked into a heavy-duty ½” electric drill and fitted on the end of a hex drive shaft, works well, though it will probably require a partner to hold and operate the drill while you inspect and lube all the chains on the planter. You’ll have to disconnect the main chain to the seed drive transmission so the driveshafts can turn freely.
