TD80D Fuel system Problem Harry in KY

Jerry/MT · Apr 27, 2023

I have a TD95D and i read your advice to the guy having a problem wit a TD80D. Why do you think the water separator is the problem? I had a problem on my NH TD95D last year. I never get an indication of water in the fuel from the sensor. How ever I was able to get a lot of water out of the drain. I cut the separator open after replacing it and I expected to see some filter material in it. All I found was a sheet metal cone and a big spring! I think the cone thins out the fuel and water mix and the water drops into the lower chamber because it's less viscous than the fuel. That's my theory any way.

Harry in Ky · Apr 27, 2023

A water separator itself is not a bad idea. It all depends on the unit. The ones I see on the TD series tractors are mounted under the cab (or floor plate), and behind the ladder assembly, often tend to be neglected. Sooner or later fuel problems arise and finally someone decides to replace the spin on element. By then it's probably years old, corroded, and in an awkward spot to deal with. By the time the filter is changed the base and brackets are bent, twisted, the fittings get torqued, yanked around, and before you know it there are air leaks. Mounted between the tank and the lift pump, air leaks tend to cause problems.

If it's in good shape, and serviced regularly, then it serves a purpose. When I come across one on a tractor with fuel supply problems, repeated air in the system issues, one of the first things I do is bypass it to determine if or not it's part (or most) of the problem. The results determine what comes next.

Jerry/MT · Apr 28, 2023

Thanks for the reply.
I'm going to see if I can fit something with clear bowl at the bottom so that I can easily monitor water separated from the fuel. The system on theTD95D suoosedly has a sensor that is supposed to set off a light in the dash panel. If you have a light it usually comes on when you turn the key to the run position. Never saw one on my panel so I don't believe the water sensor lead is hooked to anything. I have had water in the fuel and never got any warning. I even replaced the sensor but no luck. As you say, it's a bit of a chore to check the separator for water because of the way it is located. But I can do it. Given these facts I would like to have a device I can monitor visually and drain as needed. Do you know of anything like that?

Harry in Ky · Apr 28, 2023

https://www.ebay.com/itm/143650551023?_trkparms=amclksrc%3DITM%26aid%3D1110006%26algo%3DHOMESPLICE.SIM%26ao%3D1%26asc%3D247548%26meid%3D483d88d25c6e482d8cf0486c10d78ea9

Are you thinking of something on this order? There are a number of different units available, but I would suggest something like this one because it doesn't come with a filter element. You really don't want a replaceable element. All you want is a bowl to collect the water, and a way to drain and clean it out when necessary. An element makes you captive to finding the proper replacement when it's needed, and you probably won't find it.

I have one similar to this that I hang on tractors as a temporary measure when needed. Not sure where I got it, probably a leftover from something. It has banjo fittings more like the one on your tractor. Makes it easy to swap fittings for different hose sizes.

Jerry/MT · Apr 29, 2023

I ordered a Racor with a 10 micron filter and a transparent bowl on the bottom. It's my understanding that the filters are treated to shed water and they maximize the collection of any water in the fuel. It was only $49 so I figure it's worth a try.

Jerry/MT · Apr 29, 2023

https://www.ebay.com/itm/29325149723

Harry in Ky · Apr 30, 2023

It's your choice, as always, but I wouldn't go with a 10 micron filter on the suction side of the supply pump. In fact, when I'm dealing with fuel supply/air ingestion type problems I don't put any element filter ahead of a supply pump. I mainly use something with a fine mesh screen, nothing truly restrictive at all. Just enough to catch trash, bugs, hay stems, etc. If I felt the need for more filtration I would place it after the pump so the fuel flows through under some pressure, not vacuum. If you mount that in the same spot as the original, I think you're increasing rather than decreasing the chances of air ingestion into your system. You're asking the supply pump to pull fuel from a low mounted tank, through a filter element, and then up to the engine.

I'm not here to tell you what to do or not to do, but if you want opinions, that's my take on it.

TD80D Fuel system Problem Harry in KY

Jerry/MT

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