8070 running hot

Pull the radiator and very throughly clean it. Blowing it out in frame isn't enough. That did wonders for my 8030.

Is all the foam in place?

I had the radiator flushed about 4 years ago, probably start there. Foam is in place. InjpumpEd just did the pump, so safe to say its okay, I will check the temp from the top to the bottom,  new thermostats last fall. What is the temp when the needle is straight up on the gauge? assuming it is about 200 degrees. It seams to cool off in a minute or so. Thanks for the ideas, will try them all.

Are the fan belts TIGHT? I think it was Dr. Allis that said once that they have to be tight. That's a big fan and any slippage makes it slow down quite a bit.

I dont know how the 8000s are set up, but a guy I know had a 4255 deere that would run hot. They did everything they could think of even a complete overhaul but it still ran hot.They finaly solved the problem by bolting the fan clutch solid. That fixed it. It turns out the fan clutch was wore and wasnt turning the fan full speed. My 7060 dynos 210hp I have never had a problem with it running hot, 90 plus with the ac on 26ft disk behind it.

I don't know what hot is, but I don't like to see my digital gauge hit 200. When it does I would shift down a gear for a while. I was pulling a Phillips harrow 9mph in hills. Always wanted to put a 7080 radiator in it, but it's no longer used for that now. I assume the 8070 has the same core radiator as a 7080 though.

I talked to the local radiator shop guy to day, he cleaned and flushed it out 5 years ago. He sugested that i move the oil cooler out of the way, and take out the air cleaner out so it could be blown out and check if i could see through it, before i take it out. I will try that first. I assumed that the new sending unit was a match to the gauge, an Allis part from the dealer. Simple things first. It cools down fast is what made him think a air flow problem.

Talking of hot engines, reminded me of my uncle and his son years ago. both are deceased now... But anyways, they had finished planting all their crops and seen a local farm that was listed for sale. the old man wasn't asking much for it and the deal was struck for the 180 acres and to hurry up and get it planted, they traded in a 4010 on a new 4620 JD, hired a fellow with a D7 to push out the fence rows and cattle lanes and to run through the old pastures with a brush disc. They got started plowing with their 4020 and 4620 and had the other 4020 on the planter.  8 hours into the day with the new 4620, the heat gauge needle flopped over and they called the JD dealer and the man told them he didn't have anything to use to take the place of the new tractor. They called a fellow with a stieger and he came with his big plow and started in and got about 60 acres done and he lost a plunger barrel in his cat engine... So... they put the 4620 back to work and it was so hot that they closed the cab doors and watched the heat radiate off the engine and hated looking at the gauge flopped over and threw their gloves over it.  Every three hours they pulled the drain plug and dumped new oil in and went back to work... and they weren't babing it... They figured that by the time they were done, it would probably need a new engine... Think they changed the oil close to 40 times in it because it would be all broke down in 3 hours run... tractor went into the shop, and found a water tube had dropped down inside and didn't allow the water to circulate correctly, they reinstalled the tube and that tractor engine was still going strong without using oil between oil changes when it was sold on the retirement auction 18,000 hours later... musta been broke in right. LOL 

glad to hear it's not that darned old pump again! You had enough problems with it before I got to rescue it lol!