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bonhammj

Posted 6/17/2023 05:37 (#10274377)
Subject: Followup on the JD7410 transmission coupler

Southern NJ

Here is my followup post after using a JD7810 transmission coupler to replace a worn 7410 coupler/shaft.

I took the larger coupler to a machinist and had him cut it down. I more or less took a guess at how much I needed cutoff and what you see in the picture is about 2.75 inches overall length. I did end up grinding it down slightly. If you look at the before and after photos you should be able to get pretty close on the size. Also added a grease fitting and installed the rubber boot (not shown)

It took a little effort to get it installed as there isn't much wiggle room but I believe this will gain me a few years before I need to replace the shaft. If I'm lucky maybe I won't, but If I have to replace the shaft I will again cutdown a 7810 coupler.

This tractor only has 3000 hours on it. Had John Deere used a coupler that engaged the splines more there wouldn't have been an issue.

I seriously recommend everyone with this series tractor look into this before the shaft gets much wear on it.

Pic 4 shows the difference between the 7410 and 7810 couplers. Picture 3 is how far the 7810 coupler was machined down.
Picture 5 shows the coupler from the machinist before I took a bit more off.

Edited by bonhammj 6/17/2023 05:49