Yanmar 1500 hydraulics

Post your questions or problems you are haviing with your Yanmar tractor here.

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Spencermac17
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Yanmar 1500 hydraulics

Postby Spencermac17 » Mon Sep 14, 2020 8:40 am

The three point hitch on my Yanmar 1500 doesn’t seem to be working right. The lever doesn’t seem accurate. If I pull up, it goes up and just keeps going up, if I push down it goes down and just keeps going down. There’s a tiny sweet spot where to will hold what it’s got but that spot is super easy to lose. So if I pull the lever up an inch from the holding sweet spot, the 3 point will pretty much just keep on going up until I push down again. It’s like there’s an up, a down, and a hold. If I lift out of the sweet spot while shredding, it lifts way up, then bottoms out when I try and lower again, so I end up having to mow with one hand on the lever making constant tiny adjustments as I go along. I’ve tried adjusting the speed knob under the seat in front and the small knob under the seat in the middle but it doesn’t do anything until it’s closed off entirely.

Any ideas?

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Re: Yanmar 1500 hydraulics

Postby Aaron » Mon Sep 14, 2020 12:28 pm

There is kind of an intricate linkage system there and my guess is that something is not adjusted quite right or something is binding. Has the tractor always done that (bought it that way) or just started doing it?
Image

winston
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Re: Yanmar 1500 hydraulics

Postby winston » Mon Sep 14, 2020 2:39 pm

Is your spring #38 attached and in good shape?

Spencermac17
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Re: Yanmar 1500 hydraulics

Postby Spencermac17 » Tue Sep 15, 2020 11:47 am

Spring #38 is rusted but still feels solid. There’s give but it pulls right back without issue.

The bar in the left, 17 or 58, I can’t tell, is broken however. The top is sheared off where it should plug into 42.

It also looks like there should be a spring that attaches to that triangle piece between 42 and 43 maybe? It’s not on the diagram but it looks like an empty attachment.

And it’s always been like this. Haven’t owned the tractor long. Originally hydraulics didn’t work, but clean oil, a flush, cleaning the screen and a new hose got the 3 point moving.

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Re: Yanmar 1500 hydraulics

Postby Spencermac17 » Tue Sep 15, 2020 11:56 am

Hopefully this link works.

Here’s what I’m looking at.

https://imgur.com/gallery/vHTbAnx

Blue is sheared bar.
Red is the part that looks like it’s missing a spring

winston
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Re: Yanmar 1500 hydraulics

Postby winston » Tue Sep 15, 2020 5:16 pm

That is your feed back rod and your problem. https://www.hoyetractor.com/PROD/194151-47512.htm

Don't think a spring goes there.

Yours should look like this.
draft1.jpg
draft1.jpg (195.22 KiB) Viewed 779 times
Last edited by winston on Wed Sep 16, 2020 4:06 am, edited 1 time in total.

Spencermac17
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Re: Yanmar 1500 hydraulics

Postby Spencermac17 » Tue Sep 15, 2020 6:22 pm

That would be awesome, thank you so much! I’ll get it ordered and installed ASAP.
I’ll send you an email shortly.
Thanks again.

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Re: Yanmar 1500 hydraulics

Postby Spencermac17 » Sun Sep 20, 2020 8:30 am

I’ve gotten a replacement rod but it looks different. I tried to mount anyways as it looks like an updated piece, but I honestly think it will just break again. I got it set but the rod started to bend under the stress of the weight of the lift arm alone. Any thoughts?

https://imgur.com/gallery/0ej053R

winston
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Re: Yanmar 1500 hydraulics

Postby winston » Sun Sep 20, 2020 8:45 am

If adjusted correctly I wouldn't think it should be getting in a bind. Might read through this thread and see if anything in it might apply for you. viewtopic.php?t=1193

Spencermac17
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Re: Yanmar 1500 hydraulics

Postby Spencermac17 » Sun Sep 20, 2020 1:07 pm

Should the hole that the rod feeds into pivot? Mine doesn’t and I wonder if I need to break it loose to fix the problem.

winston
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Re: Yanmar 1500 hydraulics

Postby winston » Sun Sep 20, 2020 1:15 pm

Yes, it should pivot.

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Re: Yanmar 1500 hydraulics

Postby Aaron » Mon Sep 21, 2020 8:12 am

It is correct. There was just a design change. See link below
https://www.hoyetractor.com/PROD/194151-47512.htm

Usually those holes have enough wear that the new pin is not too tight but if it is too tight you can just drill the hole out slightly.

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Re: Yanmar 1500 hydraulics

Postby Spencermac17 » Sun Sep 27, 2020 4:54 pm

So. I spent a good while over the weekend tinkering and figured it out. The pivot hole was rusted solid. I was eventually able to break it loose, get it moving smoothly again, and got the feed back rod installed. It’s made it into a whole new tractor. Solved my issues completely.

Thanks for your help guys.


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