tractor over heating

[dansangus]

Having trouble with my allis 7040 .Seems to be running hot. Temp gauge is around 220- 225. Belts are not slipping,not low on coolant or leaking coolant. Replaced both thermostats. When I shut it off, I can hear it percolate.bubbling sound. Could the waterpump be damaged inside? It seems like its not circulating coolant properly. Never ran into this problem before. Thanks Dan

 

[skyhightree1]

Have you been mowing any tall hay or bushhogging and bumping into tall grass with seed heads and such trash like that could have blocked the radiator fins and not getting enough air. I have however had a waterpump that the fans were messed up on and it was not propery making the water circulate. I would try power washing the fins on the radiator if you haven't already. The radiator may have a blockage have you removed that or tried to flush it?

 

[Tim/South]

I agree.
Either the radiator does not have proper air flow or the water pump impeller is worn out.

 

[greybeard]

Look at you radiator hoses too--especially the lower one. A bad lower hose will collapse --sides get sucked in at medium-high rpm and load and not allow enough water into the radiator. Lower one does it most often, but depending how the bypass for the t-stat is made on yours, either or both can collapse.

 

[skyhightree1]

I agree.
Either the radiator does not have proper air flow or the water pump impeller is worn out.

Thanks Tim/South I couldn't remember what the technical term for that was lol

 

[tom4018]

Radiator tubes can be clogged and not allowing coolant to flow thru it if it has not been kept changed.

 

[highgrit]

It's a Kubota, and every one that I have worked over heated. The screens on the front and the radiator needs to have the dust and dirt washed out. The 8200's will not bale hay in a dry, dusty field for one day without running hot.

 

[tom4018]

It's a Kubota, and every one that I have worked over heated. The screens on the front and the radiator needs to have the dust and dirt washed out. The 8200's will not bale hay in a dry, dusty field for one day without running hot.

He says it is a Allis. Never had any issues with my Kubota 7040 overheating.

 

[chevytaHOE5674]

Clean out the radiator. Also make sure that the foam around the radiator is all there and in good shape, if it is missing then the fan doesn't move enough air through the rad to cool it.

 

[B&M Farms]

It's a Kubota, and every one that I have worked over heated. The screens on the front and the radiator needs to have the dust and dirt washed out. The 8200's will not bale hay in a dry, dusty field for one day without running hot.

He says it is a Allis. Never had any issues with my Kubota 7040 overheating.

He77, I have had issues with all of them from blue ones, red ones, orange ones to even green and yellow ones. If you use them they will eventually have a problem. All of them.

 

[dansangus]

I have tried everything mentioned and plus the radiator was rebuilt a fears ago. One other thing- the top hose is very hot to the touch while the bottom is only warm.This is after running for 15 minutes. Temp gauge is still near 220. Before I pull the waterpump,could there be anything else I could have missed? Thanks again DaN

 

[Kingfisher]

You might remove , inspect and test the thermostat. Sounds like it might be part opening. You might see if your Allis has a plastic impeller on the pump or not. I doubt a metal impeller would deteriorate enough to cause your complaint. Does it have a/c ? Is their a bunch of debris trapped between the radiator and condenser?

 

[Stocker Steve]

1) Buy a new cap (I don't like to hear them hissing)
2) Back blow radiator with compressed air and recheck temp. ( I don't like making mud)
Since you have replaced the radiator and thermostat you may want to skip the next 2 steps
3) Remove the thermostat entirely and recheck temp.
4) Chemical flush the cooling system and recheck temp.

Last hot one I worked on was a used bargain that needed a lot of TLC. Turned out the old antifreeze was so bad some of the flow channels in the block were partially plugged... Found that out when we replaced the head gasket.

 

[lavacarancher]

I ran my tractors pretty hard last week trying to get the hay worked up. The JD started to overheat but when I washed out the radiator fins it didn't overheat anymore.

If you're operating at 200 degrees or more and you shut it off you will hear "gurgling" in the system. It's called heat soak where the temperature actually goes up a few degrees causing the coolant to "boil". Perfectly normal.

Everyone here has made good suggestions. In this order check:

-Radiator fins clear
-Radiator hoses (if they need to be replaced get the kind that have the spring inside the hose. This keeps the hose from collapsing.)
-Check to see if the radiator tubes are open. You can do this by bringing the engine temp up 'till the thermostat opens then have someone hit the throttle up and down (goose it) and see if the coolant level rises and falls in the radiator. BE CAREFUL DOING THIS. IF THE RADIATOR TUBES ARE CLOGGED THE COOLANT WILL/MAY COME GUSHING OUT OF THE RADIATOR BECAUSE THE COOLANT IS NOT FLOWING AND THE COOLANT IS BEING RETURNED TO THE RADIATOR (top of the rad) FASTER THAN IT IS BEING SUCKED OUT (bottom of the rad). USE A MIRROW TO DO THIS.
-Water pump
-Head gasket

Good luck

 

[tom4018]

I have tried everything mentioned and plus the radiator was rebuilt a fears ago. One other thing- the top hose is very hot to the touch while the bottom is only warm.This is after running for 15 minutes. Temp gauge is still near 220. Before I pull the waterpump,could there be anything else I could have missed? Thanks again DaN

That is a sign of poor flow, could be radiator clogged, water pump impeller or hose restriction.

 

[Stocker Steve]

If your radiator is "clogged up"- - how much good does the "flush" additives do? I assume they can not get to and thru areas that are totally closed...

 

[dun]

If your radiator is "clogged up"- - how much good does the "flush" additives do? I assume they can not get to and thru areas that are totally closed...

ZIP, NADA, ZILCH

 

[M.Magis]

I didn’t see it mentioned, I apologize if I missed it. But a bad radiator cap can cause overheating. Usually easy to check, and cheap to fix.