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Dan -- I think you left out one important aspect of the pitch circles. Correct me if I'm wrong, but don't they determine the gear ratio? Specifically, aren't the velocities of gear 1 and gear 2 equal at the pitch circle? For example, if r1 is the radius of gear 1 in inches at the pitch circle...

I think the point we've been arriving at is that sliding between gear surfaces is a function of geometry, not lubrication. The lubricant must be designed/spec'd propertly because there is sliding, both to provide the necessary lubrication to the gears, but also provide longevity to the lubricant.

Are you using the term "pitch line" synonymous with "pitch circle"? I found a definition of "pitch line" in the context of a linear gear, and it seemed to be analogous to the term "pitch circle" when used to describe a circular gear.

I am proud of what we have accomplished.

Damn you guys ... now I'm sitting here pondering the mathematical definition of sliding versus rolling. The best I can come up with is something like: assume two meshed gears called P and Q, with P representing the set of all points on gear P and Q representing the set of all points on gear Q...

There are 3 T1060-33720 relays used, but the one that @Fordtech86 mentioned was T1060-33710, which is the glow plug relay and seems to look more like the relay in OP's picture. But all this guesswork is unecessary if OP provides a picture of where the relay was located.

And those three applications are?

It sure looks like the glow plug relay. You know, it's possible that this relay is bad but also not be the cause of your problem. https://apps.kubotausa.com/illustrated-parts/

oh yeah, we're definitely well into "beating this up" territory. Yup, no doubt 'bout that. @Fordtech86 it's about time you showed up ;)

You mean turning the driveshaft by hand back and forth doesn't give an accurate measurement? :D

I agree. Ok so would it be correct so say that the question at hand is "how do you measure lash when you can't use a dial guage?"

Do we even know that the Kubota manual is directing the use of plastiguage? If I recall, OP said that the manual used the term "fuse" and wondered if that was plastiguage, and we're off to the races. Or has this simply become a thought problem? Not ever having even opened up a differential...

This is cool. I have no experience adjusting differentials, so I looked up "gear marking compound" and landed on this page ... https://www.yukongear.com/blogs/how-to-create-read-ring-gear-patterns_1 I've read about this before and it refreshed my memory that the goal is to properly position the...

Add me to the list. @fried1765 your comment brings nothing to this thread.

All good now. I knew you were trying to say something but I read and re-read your posts and could not for the life of me figure out what it was. My comment about disconnecting the alternator was simply a thought experiment attempting to determine what you were saying. I think both you and...

I love this! Reminds me of my two success stories from years ago on my Volvo 145 station wagon. Young but not dumb. First was when I figured out that one of diodes in the alternator was bad, so I replaced it instead of buying a whole new alternator. Second was replacing upper and lower bushings...

I'm so confused ... you seem to be disagreeing with something that you agree with. I need more coffee.:coffee: Are you talking about situations where the positive battery terminal is the common?

I'm confused about what distinction you're trying to make. @Henro was pointing out the importance of checking the battery negative to frame connection, which you apparently agree with. What is it about the statement that "ground circuit starts at the negative battery terminal" do you find...

Thanks. I read your posting and then two additional resources: 1) https://bobistheoilguy.com/forums/threads/how-does-detergents-and-dispersants-work-in-oil.18621/ 2) https://www.planeandpilotmag.com/article/issues-with-oil/ The second one was especially helpful. Here's a particularly...

You explained why aviation oil, containing dispersants rather than detergents, is advantageous in an aircraft engine, because it doesn't result in metallic residues. Do you know what the advantages (if any) are of detergents? Are they simply cheaper or do they have some performance advantage...