YM2500 HYDRALIC LEAK

[kyspartan]

My 2020 and mt 1700 has no leak down even with very heavy implements on them. So not all leak down

so if you leave them up for a week with a heavy implement on them they will stay up. that is great you got some tight seals in those tractors.
Ive operated a new bota 4330 that leaks down with a 6 foot woods cutter, a M bota that would leak down with a howse 7 foot heavy duty cutter, a ford 2000 would leak down in a day with out an implement in a day, david brown 990, a massy 135, my jinma takes about two weeks to go to the ground with a medium duty 6 foot box blade on it, every tractor i have ever operated has leaked down.
even the front end loader and backhoe on the bota 4330 leak down pretty fast. on the backhoe if you start moving dirt with the front end loader i hafta put in the storage pins on the backhoe other wise you will be dragging the backhoe bucket after about 10 minutes

 

[Gizmo36]

My yanmar 1700 don't leak down. My 2210 don't leak down . I pull a motor with my 2210 and a boom pole . And the motor stay in the air for a week and did not go down. If it was mine they would fix it now , while it is under warranty. Look's to me the other one was a better deal. At least they did not shoot you a big line. I told you If it was me I would have got it from HOYE . They are good people,nuff said.

 

[Eddie]

so if you leave them up for a week with a heavy implement on them they will stay up. that is great you got some tight seals in those tractors.
Ive operated a new bota 4330 that leaks down with a 6 foot woods cutter, a M bota that would leak down with a howse 7 foot heavy duty cutter, a ford 2000 would leak down in a day with out an implement in a day, david brown 990, a massy 135, my jinma takes about two weeks to go to the ground with a medium duty 6 foot box blade on it, every tractor i have ever operated has leaked down.
even the front end loader and backhoe on the bota 4330 leak down pretty fast. on the backhoe if you start moving dirt with the front end loader i hafta put in the storage pins on the backhoe other wise you will be dragging the backhoe bucket after about 10 minutes

I have a 5' bush hog brand finish mower which is very heavy and it will stay up indefinately on both my tractors. I have owned tractors up to 100 hp and none of them leaked down. If I bought a new bota that leaked down it would go back to the dealer immediately!

 

[Travis_R]

O.K. Thanks for the replies. But I don't think ya'll understand. I don't think I made it clear enough though either.

When I say it leaks down, I mean it REALLY leaks down! With my 6' blade, Bush Hog Squealer, or whatever. With my Squealer attached (my heaviest implement), in the air (Up position), tractor not running, It takes about 1 minute when the fluid is hot!!!!! Maybe 1 and half minutes if I'm lucky. THIS IS NOT RIGHT!!! I DIDN'T PAY FOR A TRACTOR TO HAVE THE HYDRAULICS LEAK THIS FAST!!!

Funny thing is, is that it did NOT leak down with the old control valve assembly. It just leaked fluid from the control valve when the tractor was running but the implement NEVER dropped when I killed the tractor. It only started it when the mechanic changed the complete valve assembly (Used one AND new one- which is the one installed on it now).

Hey, I wonder if it could be because the mechanic didn't put a gasket under the new control valve assembly. All that he used was some purple liquid stuff. Its not leaking fluid anywhere, but maybe the gasket served as a spacer or something too. What ya'll think?

I don't want to go back to the dealer for the 4th weekend in a row. Its costing me too much in fuel. I think I can fix it with ya'll's help and my parts manual.

I DO HAVE A OPERATOR'S MANUAL (came with tractor) AND A PARTS MANUAL (bought from Hoye).

I really need this fixed. Its bothering me a lot. Being that it didn't leak down with the old control valve assembly, makes me think that the problem is somewhere 'around' the control valve area. Maybe its something as simple as just needing the gasket.

Gizmo,

I had a deal with Hoye on a tractor (YM2310) and some attachments. We even had the delivery date set. It ONLY fell through because Mr. Stan called back and said that he found the tractor had a welded block. Thats PURE HONESTY in my book. Thats why I will be buying parts from them for my YM2500. He was honest enough to tell me that (and didn't have too- most people wouldn't have).
I told him that there were too many tractors that didn't have welded blocks. He agreed with me. But like I said, thats why I didn't buy from him. And I wasn't interested in the other tractors that he had. They were either too small or were 4x4 with loaders attached.

PLEASE HELP. ANY sugguestions from dealers? I know ya'll must be following this thread. Come on!

Travis R

 

[lens12]

I don't buy the safty feature idea. that was a dumb statement on their part. Some leak some don't. As long as it stays up while running, I wouldn't be concerned.

 

[Eddie]

O.K. Thanks for the replies. But I don't think ya'll understand. I don't think I made it clear enough though either.

When I say it leaks down, I mean it REALLY leaks down! With my 6' blade, Bush Hog Squealer, or whatever. With my Squealer attached (my heaviest implement), in the air (Up position), tractor not running, It takes about 1 minute when the fluid is hot!!!!! Maybe 1 and half minutes if I'm lucky. THIS IS NOT RIGHT!!! I DIDN'T PAY FOR A TRACTOR TO HAVE THE HYDRAULICS LEAK THIS FAST!!!

Funny thing is, is that it did NOT leak down with the old control valve assembly. It just leaked fluid from the control valve when the tractor was running but the implement NEVER dropped when I killed the tractor. It only started it when the mechanic changed the complete valve assembly (Used one AND new one- which is the one installed on it now)

If the tractor is still under warranty I would insist that it be fixed right or a complete refund. I wouldn't put up with a tractor that leaks down that fast. As you say IT IS NOT RIGHT!!!!!

 

[shvl73]

I can understand now that you've explained it. It didn't leak down (at least as fast) before, it just leaked fluid. Now after the repair, it leaks down within one minute, but no fluid leak. That would frustrate me a bit. I guess only you can decide if its worth travelling back again or living with it. You can possibly return it for complete refund, although this may be premature at this point (or sell it) and buy one from one of the dealers here on TBN that have clean used Yanmars. They will at least have tested them out for you, but there will be shipping cost.
Good luck

 

[Travis_R]

I know that some are saying not to worry about it. But I can't help it. I Have to fix it- just to give me peace of mind (and to help re-sale). DOES ANYBODY KNOW WHERE I AM SUPPOSED TO START TEARING IT APART? I think that the problem seems to be somewhere in the control valve assembly- If I had to guess. But I could be wrong.

With the implement up, tractor killed, and the "lock out" valve (in front/underneath the seat) is closed, it DOES NOT LEAK DOWN.

Also, with the implement up, tractor killed, "lock out" valve open, AND the valve behind the seat- sort of UNDER the right lift arm- is closed, it DOES NOT LEAK DOWN.

These two reasons make me believe that the problem is up top in the control valve assembly- or somewhere in that area.

Hey I wonder if the hydraulic screen could be plugged up a little? It DOES seem like its starving for fluid (squealing hydraulics) at times. Especially when it gets hot. Will that cause it to leak down when engine is killed, but stay up while running?

Maybe I should check the screen and all the "little" stuff before I start tearing into it? I know I can fix it if ya'll could just guide me through.

If needed, I AM ready to start ordering parts immediately. But I want to rule out the small/obvious things first. Right now, I know that I'm gonna need the control valve assembly base gasket (Yanmar part# 194151-45841) IF the control valve assembly has to be removed. I'll probably go ahead and remove it any way JUST to put the gasket on. Right now it only has the gasket that was made out of the purple liquid stuff (which isn't even a gasket). It STILL isn't even dry on the edges after almost a week!!

WHERE DO WE START??? I/WE CAN DO IT! (this is what TBN is about anyway, isn't it?)

Travis R

 

[LMTC]

I'll probably go ahead and remove it any way JUST to put the gasket on. Right now it only has the gasket that was made out of the purple liquid stuff (which isn't even a gasket). It STILL isn't even dry on the edges after almost a week!!
Travis R

Sigh.............

Hylomar Universal Blue
The following is just the highlights.
Important Features ::

Non hardening and non setting even at high temperatures.
Seals surface imperfections.
Allows metal to metal contact ensuring a very strong structural joint.
Color :: Blue

Typical Applications ::

Water and oil pumps, instruments inspection cover, cylinder heads and sumps.

Coating pre-formed gaskets, weatherproofing motors and outdoor high voltage circuit breakers.

Inlet manifolds, timing case covers, oil pumps joints, gearbox and transmission components, thread sealing.

Gas turbines, water cooled generators, turbo vacuum systems and any machined surface.

 

[Normmm]

Sounds like the cylinder is ok. Try raising the lift all the way and then lowering it to about 80% and then shut off the tractor and see how long it takes for it to lower. If it stayes up then you have a linkage problem and a adjustment will solve it and the pump nouse you refered to.