Yanmar EX450/CL400 problem remains

vukhuongduy · Mar 26, 2014

Dear j-j Dear j.j Thank you very much.
You are very knowledgeable in hydraulics.
i have no knowledge of hydraulics.
Thanks to your advice to help me choose the hydraulic system.

For example, I run 12HP engine. Should I choose how many gpm pump, cyl, hand controls and the accompanying accessories like the system to suit.

Thereby I will look to buy spare parts in the country or in china.
Actually I need. Please help me

Here is the model I want to follow: Mini pelle JMEKA. helps you learn me. what I need, its parameters.

Thank you !

Eyecatcher · Mar 26, 2014

I went out and looked at the tractor to see if I could trace the hydraulic flow. It's impossible to see much of anything without removing the right rear wheel, and of course the tire is loaded. I'm using the tractor almost daily in the garden, so guess I'll just have to postpone pursuing this any further until season is over, and I can get my son to come help me handle that tire. I certainly appreciate your interest, and I'll get back with you when I get a chance to remove the wheel. As a point of interest, when they build the tractor, they evidently mark critical fasteners with white paint, to determine if they have moved. The lug bolts on that wheel have paint marks that haven't been disturbed. Wonder how they changed that valve.

J_J · Mar 26, 2014

vukhuongduy said:
Dear j-j Dear j.j Thank you very much.
You are very knowledgeable in hydraulics.
i have no knowledge of hydraulics.
Thanks to your advice to help me choose the hydraulic system.

For example, I run 12HP engine. Should I choose how many gpm pump, cyl, hand controls and the accompanying accessories like the system to suit.

Thereby I will look to buy spare parts in the country or in china.
Actually I need. Please help me

Here is the model I want to follow: Mini pelle JMEKA. helps you learn me. what I need, its parameters.View attachment 367315
Thank you !

Basically, your 12 HP engine can support a 7 GPM pump at 2500 psi.

So you need cyl to fit each operation of the BH.

You need at least a three spool valve, and if you use out riggers, you need two more spools.

vukhuongduy · Mar 27, 2014

Thank you very much.
I know if I race the load, you will calculate and let me know,
I need any kind cyl. Problem is I do not calculate. Anyway, thank you .Duy

gtrippleb · Apr 5, 2014

Eyecather,

I don't know if you have any of this information or not, but take a look at the hydraulic and or loader section from this website. The loader section covers the hydraulics of the loader valve.

Ex450 Technical Manual

I notice that on my Sc2400 and my NH T2320 that they both seem to go into a limp mode sometimes when curling the bucket.

Eyecatcher · Apr 14, 2014

Just as a little update, I talked to Yanmar America today about another problem, and he told me they had been experiencing similar problems to my loader problem with the EX3200's. On top of everything else, now I have a major leak at the loader valve, so am going to have to pull the right rear wheel to see what is going on. I'm sure I'll be able to take some pix. He said on the 3200s, they had been able to reverse the regeneration plate, doing away with regeneration, and everything worked fine, except no regeneration. I told him I didn't think mine had a regeneration plate, and he said he didn't think so either.

Eyecatcher · Apr 17, 2014

We pulled the right rear wheel and fender to allow access to the loader valve. Got everything cleaned up, and the leak was a banjo fitting. Copper washer seals. Didn't have a replacement washer quite that big in my kit, so reversed the inside and outside washers and over-torqued a tad, and it seems to have fixed it. Had my son and here to help me, and then 2 neighbors showed up, and you know how too many cooks spoil the soup? I had the camera setting on the bench, ready to take pix with the wheel and fender removed. After everything was back together, I remembered the camera - it's still setting on the bench. So much for pictures. I did verify that power beyond comes off the valve in the correct place, other than that, it got away from me.