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#1
08-25-2023, 12:52 PM
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Speed variation of deck spindles?!
Hi everyone;
I have been working on my 44 inch mower deck, which is under my 1974 IH Cub 108. I have successfully adjusted the mule drive pulleys so that the drive belt actually stays on and doesn't start smoking!  However, I've noticed something strange; as I'm mowing, the spindle on the left side of the deck (i.e. the one whose upper tip is visible while mowing) noticeably slows down, indicating that all three blades significantly slow down. As you might expect, this results in uneven mowing, which in turn means I have to run many more "laps" on the lawn to get all the missed spots. The tractor's engine (the Kohler 10hp) runs fine, and doesn't seem to be the issue; the spindle noticeable slows down, but the engine speed remains constant. Thinking this was a slipping deck belt, I tightened the tension pulley's spring on the deck by attaching it to the second hole on the deck, resulting in a tighter spring. This doesn't seem to have any effect. The spindles all seem fine (i.e. they aren't binding up or otherwise indicating any issue(s)). Has anyone experienced this before? Could it be the drive pulley is not tight enough (i.e. adjusting the j hook to tighten it up? Any thoughts or troubleshooting ideas would be greatly appreciated! 
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Cub Cadet is a premium line of outdoor power equipment, established in 1961 as part of International Harvester. During the 1960s, IH initiated an entirely new line of lawn and garden equipment aimed at the owners rural homes with large yards and private gardens. There were a wide variety of Cub Cadet branded and after-market attachments available; including mowers, blades, snow blowers, front loaders, plows, carts, etc. Cub Cadet advertising at that time harped on their thorough testing by "boys - acknowledged by many as the world's worst destructive force!". Cub Cadets became known for their dependability and rugged construction.
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