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About 6 months old, is this normal? Seems like it would create problems down the road when the oxidation starts to flake off
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Rusting fuel filling neck
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Try here...
www.greentractortalk.com
Anyone have Rust in thier 1025R fuel tank?
2018 and no rust as of yet. I don't keep my tank topped off. Keeping your fuel tank topped off is as much about reducing moisture in diesel fuel as it is about this issue of rust on the filler neck. Normal diesel fuel has moisture in suspense of between 60 and 100 PPM (parts per million)...
www.greentractortalk.com
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I have had that problem with a couple of my tractors, SEVENTY YEAR OLD TRACTORS, and have cleaned and relined the tanks. Makes me glad the tank on my 2520 is plastic.
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I was shopping tractors on a Sunday in the rain while the dealership was closed to find a tractor sitting there with the fuel cap off...maybe part of the dealer prep?
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Or vandalism...
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I guess it could be, not really an area I'd expect that to happen in but you never know. I mentioned it to the sales guy the next time I stopped in and he didn't even react...kept on with the sales pitch so maybe happens all the time there.
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I have had this issue on my 5320 as well. My 1025R purchased this summer has already started to rust. I'm just going to replace as needed in both and keep going. The replacements are not that expensive. And by the way I always keep my tanks topped off.
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My dealer is picking up my tractor Wednesday and acted this isn't a very common problem for them, although they have the parts in stock 
I don't expect it, but I hope they don't give me any grief over this.
I don't expect it, but I hope they don't give me any grief over this.
Just bad plating of the parts. The finish of the fuel filler neck shown in Andursun's earlier post is very flat and almost as if there is no plating on the part at all.My dealer is picking up my tractor Wednesday and acted this isn't a very common problem for them, although they have the parts in stock
I am surprised this is still happening with tractors purchased this summer as the issue was noted back in early 2019 and there was some awareness of bad plating on these parts at that time by Deere.You would think the problem would have been resolved in that time and the parts plating issue straightened out. Apparently not. .
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My dealer just called me, they have had the tractor since Thursday last week. They couldn't find any cause for why the rust developed, fuel was clear of water and not cracks in the fuel tank. They replaced the sleeve that was rusted and also the tank cap. They think the check valve on the tank cap was faulty, what do you think about this? I agree with Sulley that it looks like poor plating, I'll post a picture of the new sleeve when I get it back. They are going to try and get it returned this evening, but it might be tomorrow. Done under warranty either way, so I'm only out a tractor for a week. Not a big deal this time of year.
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It appears that S/N 120579 and after have the metal insert. S/N 120578 and prior do not.
Interesting. I wonder what the engineering reason is for swapping out the plastic tank. Or, I suppose, it might be regulatory relating to emissions. That design looks much better sealed. I know that the umbrella caps on my plane's tanks do a much better job keeping water out over the slicker flush caps on the faster planes.
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The tanks are still plastic. They changed from a tank inlet with external threads to a tank inlet with internal threads - and also added the tether.
Ah, yeah, you're right. I was thinking filler but wrote tank.
Ah, I think I found the reason! I'll take even bets it's all about part 16 on the second diagram...grounding strap. I wonder if they had a fire or something. Doesn't much matter to those of us that use it in a homeowner setting. I'm filling from yellow plastic cans. But might matter to someone filling from a transfer tank or directly from a station pump. Basically anywhere a pump is involved instead of gravity.
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This is one of those head scratching discrepancies in the parts catalog. My serial number is 225XXX, and I have the first design, with the all plastic filler and no metal inset. Even if you dropped to using the last 5 of my serial and the catalog serial, I still should have the metal insert. One of those that makes me say hmmm.
@arnoha ... take care of the fuel tank. The first design that we have is no longer available, and if I recall is over $700 to get the new tank and other pieces to replace it.
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What is your S/N prefix? JD Parts only shows a single S/N break:
Whereas the Owner's Manual selection shows several S/N ranges.
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My bad J.
1LV1025RCEH225XXX, uses catalog PC11842. In the owners manual, it'd be the first one listed, 110001.
Here a screenshot of the catalog index inside group 30-Fuel and Air
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My tank is listed in sections ST745939 and ST875901. I didn't check every part in those sections against each other, but the tanks and caps are the same. But ST875901 should not be for my tractor, according to the serial break, though it is. This is why I scratch my head sometimes and go with what the drawing of the part looks like versus what the serial number break is.
1LV1025RCEH225XXX, uses catalog PC11842. In the owners manual, it'd be the first one listed, 110001.
Here a screenshot of the catalog index inside group 30-Fuel and Air
My tank is listed in sections ST745939 and ST875901. I didn't check every part in those sections against each other, but the tanks and caps are the same. But ST875901 should not be for my tractor, according to the serial break, though it is. This is why I scratch my head sometimes and go with what the drawing of the part looks like versus what the serial number break is.
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