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Great insight. I’ll look for the 75w90. Any idea what to do for gaskets? Also, for the u joints. Do I put gear oil in there or grease? When I took it apart oil came out. If grease I assume I just pack it around the u joint and slide the housing over. If oil, how do you get the oil in there?

Thanks again for all the help so far—it’s been a huge benefit having this forum to turn to. We spent more time on the tractor and ended up tearing into the front differential. The good news: we found no damage at all to the gears inside. That’s encouraging. What seems to be the underlying...

I originally thought I could buy the U joint replacements from brand M parts, but it looks like it’s just some of the components. The part that looks worn on mine is the part that attaches to the input drive for the front differential. I don’t know if replacing those roll pins would help. On...

Update: Thanks again, everyone, for all your help so far. It’s been reassuring to know that I can ask questions here and get such thoughtful advice. I was working on my tractor again today and wanted to share what I’ve found: I removed the left axle cover to check for stripped gears—so far...

My 4 wheel drive engage lever broke so I typically always keep it in 4 wheel drive, but I may need to fix the lever to take it out when not needed. Most of my work is on dirt, but it broke when I was moving rock for a friend.

There were some filings and chunks. I’m trying to find a machine shop that may be able to weld it up, then machine it down. When I would spin the left wheel I could spin it almost an entire revolution before the right wheel would engage. Whereas the same test on rear wheels engages immediately...

Thanks for the insight. I progressed through your suggestions then found these gears on both left and right with some teeth missing. In a quick search this seems to be one of the hard parts to find, correct? Part #194441‑13950 I believe it is called the front‑final drive bevel gear. I reached...

I’m having an issue with the front wheel assist (4WD) on my Yanmar YM1510D and could really use your insights. Here’s the situation: When I jack up the front of the tractor, I can spin one front wheel by hand and the other turns in the opposite direction, but it seems like it takes a minute to...

I read something on hoye regarding gear oil. Am I good to use 90wt or 80/90 or any similar gear oil when I refill?

Anyone have an idea of what my issue might be here? I have a ym1510d. I used it recently to move some dirt and rock. After I parked it in the garage I noticed there was some oil on the front tire. See the picture. I am hopeful that’s a simple gasket to replace and relatively easy to access and...

Had a friend come over and he put a long pry bar in there and wiggled it off in less than 3 minutes. It was slightly disappointing to me how easily he got it. Got the broken pin out and I’ll see if hoye has any used ones otherwise I think we might be able to weld it back together. We pushed the...

I rented a puller from o’reillys, but it’s too big. There isn’t really much to grab onto either, unless I could get something to go in those two holes where the spring pin was. If anyone knows where I could get one that small I’m all ears. From what I could see at Harbor freight i didn’t think...

So I’m trying to take off that nut as suggested. Can’t get a wrench in there in it. So I pulled the spring pin to pull the lever off, then I was going to put a socket on that nut and take it off. I can’t get that lever off. Any suggestions? So far I’ve tried: - grabbing and pulling with pliers...

Good idea. I got under to look at it. It looks like I might be able to access it from underneath. I’ll have to remove some things, but that hopefully would be easier than splitting it. I’ll try to video when I do it so I can share.

I got underneath the tractor and could see the linkage is moving with the lever. You have to look through the drivetrain and everything. I’m not sure yet if I’ll be able to access it without splitting it or not. I’ll try to video it when I do it so I can share it.

Thanks for the response. Do you suggest splitting there due to familiarity? Or why do you suggest that?

I have a Yanmar YM1510 D. This thing is awesome! I’ve had it for just a little under a year and have used it for all sorts of different things despite the front wheel assist not engaging. The shifter you use to engage the four-wheel-drive moves freely and I don’t feel it ever engage. In reading...