John Deere 4400 overheating

[Jdtank122]

Trying to start cutting my 35 acres of wheat and having trouble with overheating. Combine will overheat after 10-15 minutes of cutting. Coolant coming out of overflow and from radiator cap. Can hear it bubbling and surging. Fan belt looks good and tight. Radiator cap looked bad so ordered a new one. waiting on it to come in from Deere. Combine has NEVER ran hot in the 12 years I’ve owned it UNTiL I Had to replace the hose from the water pump to engine before I started cutting due to rats and completely drained the radiator and flushed it while I was doing that. It had a bunch of rusty looking chips in it but got it cleaned up good. Anything I can look for incase this radiator cap doesn’t solve the issue. Thermostat? Thank you

 

[matthies]

Maybe an air bubble in the system, try turning on your heater valve and see if that helps. If you have a flare wrench or socket you could loosen the temp sender for the gauge but be careful not to mess it up.

 

[joeysmith]

WAG but did the hose get replaced immediately or is it possible a rat/bird/squirrel/grizzly bear build a nest in there you didn't see/get out?

 

[Jdtank122]

Maybe an air bubble in the system, try turning on your heater valve and see if that helps. If you have a flare wrench or socket you could loosen the temp sender for the gauge but be careful not to mess it up.

I’ll give that a try thanks!

 

[Jdtank122]

WAG but did the hose get replaced immediately or is it possible a rat/bird/squirrel/grizzly bear build a nest in there you didn't see/get out?

The rats had just chewed the outside of the hose in 1 spot causing some leaking. The grizzly bear part of your reply had me laughing haha