1710D hydraulic problem: Yanmar Tractors  -- Other Tractor Brands Discussion Forum and Review 1710D hydraulic problem: Yanmar Tractors -- Other Tractor Brands Discussion Forum

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 01-28-2003, 18:19 Post: 48338
fox9988
2003-01-28 18:19:18
Post: 48338
 1710D hydraulic problem

After adjusting the hand throttle,I have no hydraulics on the lift or the loader.I un hooked one quick coupler from the pump to the loader controls,for acsess,then reconected.The valve under the seat is opened,and hydo fluid level is fine.There seems to be no pressure from the main line coming from the pump.With the troctor running and the quick conector valve open,no fluid comes out,other than a fast drip.Thank you for any advice.






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 01-28-2003, 19:42 Post: 48344
marklugo



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 1710D hydraulic problem

First of all if you diconnected the quick coupler to the loader while it was running, then you have destroyed your pump. Your pump has either blown a seal, sheared a key or broken the shaft, all which are probable. Notice any extra oil in the crankcase? That would be the seal and cheapest repair. Other repairs could be more severe.
What happens is that the after market loaders, (I'm guessing you may have a Koyker or Kelly), are plumbed directly off the pump. If the tractor was left running and the quick coupler was disconnected even for a half a second, the pump pressure would "dead head" and the pressure would have to be relieved by puking the pump.

If this problem occured before you disconnected the loader, you may still have the same problem if the relief valve stuck in the loader valve and the cylinders were overloaded or fully extended.






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 01-28-2003, 19:46 Post: 48345
marklugo



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 1710D hydraulic problem

After comptemplating your action, I am sure you have finished the pump. The quick connecter is not supposed to allow oil to escape when disconnected. See that little ball inside. It holds the pressure back. A little seepage is normal, especially when a pump dead heads at 2500 psi.

Get your friendly dealer to take a look. From what you are describing, lack of knowledge or understanding may have caused the problem. I know it may not be an answer you are looking for, but after fixing a few tractors like this, I hope I am wrong.






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 01-29-2003, 06:39 Post: 48355
TomG

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 1710D hydraulic problem

What MarkL says is true, but I'll try for an explanation with less extreme consequences. It all depends on the particular hydraulic hookup, which I don't know on a Yanmar.

On my Ford 1710, the loader is fed from a hydraulic manifold block. The block contains a diverter valve and the system relief valve. With the diver in the auxiliary system position, oil goes from the block to the loader valve, back to the block and on the 3ph. If the loader valve is disconnected the relief valve still provides protection. Of course, prolonged operation would overheat the oil and damage the pump.

My loader valve has threaded fittings for the inlet and return lines and quick-connects for the cylinder hoses. I'm not sure where the quick-connects mentioned are. I think it would be unusual to have them on inlet or return lines except for something like a power-beyond kit. The problem you describe would happen only if the valve inlet or return hoses aren't connected or if a loader valve isn't centered.

What I hope you find is that the tractor has quick-connects on inlet or outlet lines, it does have relief valve protection when the loader valve is disconnected and that a quick-connect just isn't seated properly. That can easily happen especially for people who haven't used them much, and they can be hard to reconnect if there's pressure in a line. I'd also jiggle the loader controls to make sure they are centered.






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 01-29-2003, 07:33 Post: 48361
marklugo



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 1710D hydraulic problem

Tom,
That would be the case for your 1710. However, the Yanmar gray market system is a little more primitive and all of the FEL's that I have seen on these tractors plumb the same way.






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 01-29-2003, 16:28 Post: 48379
fox9988
2003-01-29 00:00:00
Post: 48379
 1710D hydraulic problem

The problem seems obvious after reading your replies.I disconnected the main pressure line with the tractor running.Does anyone know were to get the parts (key hopefully,seal,or pump)to fix it.






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 01-29-2003, 17:30 Post: 48381
marklugo



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 1710D hydraulic problem

This is the reason that I have felt that the people trying to make an extra buck and sell these gray market tractors were doing a big disservice to their customers. The parts are not generally available. First of all, your machine is close to 20 -25 years old. The Japanese obsolete even their US tractor parts inventories beginning around 8 years. (this keeps ya-a-buyin' new un's) Second there isn't an exact cross over to Deere. Third, what parts there are, they are sky high. Fourth, many dealers offer no service or warranty. Fifth, etc. etc. etc....

Let's see I still think I can Help. Lazenby's Equipment in Starke FL is the best I know for this. They sell Yanmar Gray tractors directly from Japan. In fact, he goes over and hand selects the tractors himself. He also warranties and services the product he sells. He will also tell you the truth if you want to hear it. He has a web site. I don't have it right here but do a search for lAZENBY'S EQUIPMENT.






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 01-29-2003, 22:23 Post: 48386
lsheaffer



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 1710D hydraulic problem

First of all . You don't have a YM1710 . There is no such beast. I'm guessing you have a YM1720 or YM1700. You probably sheared a key. I can supply the key. I also have a used pump for a YM1700.
Secondly I disagree with Marklugo. Yanmar does not obsolete their US parts inventories at 8 years. I can get most any part for a US model Yanmar & they haven't sold a tractor in the US for 10 years.. I can get most parts for Bolens/Iseki tractors. Satoh /Mitsubishi tractors doesn't have quite as good a coverage, but pretty good for 20 year old tractors.But then I can't get everything I want for 100hp JD tractor either. You don't need a cross to Deere . You just need someone that can supply Yanmar parts. Yanmar has the cheapest parts of any compact tractor, Especialy when it comes to bearings & seals. The other brands are higher.

I can't argue with the statement"many dealers offer no service or warranty. ". I don't call those people dealers, they are tractor sellers. They are good for my parts business .

I still believe the grey tractors are a good value. One of the reasons they are so much cheaper is that getting parts is not as convienent as going to your local equipment dealer. I also beleive it is very important to buy a high quality tractor to start with.






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 01-30-2003, 05:29 Post: 48393
TomG

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 1710D hydraulic problem

MarkL & Leonard: I did think that you know about Yanmar hookups. I suppose there would be the possibility of an after-market installation where my explanation would hold. At least the possibility of my 'no repair needed' explanation should be checked off.

It's really too bad if the pump was deadheaded. I do think that a design where there is the possibility of a disconnecting a quick-connect that would deadhead the pump is close to incredible. After all, standard quick-connects do fail or simply pull apart if a hose snags. I pulled one apart myself last summer.

A bunch of us owners do have the sky-high factory parts problem. My starter has taken to not engaging on the first try every time. I inquired about parts from my NH dealer. In Canadian dollars, it's $850 for a new starter and in pieces it doesn't take long to buy several complete starters--$185 for a solenoid, $450 for the gear drive, $350 for the field etc. Oh, and in Ontario we add 15% tax on everything.

I have to check the battery condition, charging system and wiring when it gets warmer, but a 15-year old solenoid seems a good possibility. AT 650 hours I wouldn't expect much else on a starter to fail. At any rate I might be looking for after-market sources, used parts or even Shibaura to Ford crosses. There are a number of companies that sprang up to mostly to supply parts for pre-'62 Fords after NH dropped parts support for these tractors, and the after-market prices seem pretty good. I haven't seen after-market sources for mid-80's compacts yet.






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 01-30-2003, 07:03 Post: 48396
larry



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 1710D hydraulic problem

Hi Tom
I would get the starter "bench tested"
I thought mine was going (also $900 Can.)& it turned out that it (Cub) needed a relay to put more "juice" to the starter.About a $30 fix.Now it works A-1
Larry






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Discussion Boards > Active Subjects > Messages as Posted > Yanmar Tractors Forum

Thread 48338 Filter by Poster:
fox9988 5 | gbirky 1 | larry 1 | lsheaffer 4 | marklugo 5 | TomG 5 |




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