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A JD why ?

crsutton81

crsutton81

Member
We have 2 of these automatic tobacco primers that run the JD 219 diesel engines in them. During this hot spell 1 of them was running considerably cooler than the other one, albeit neither were in danger of running extremely hot. I got to looking and the only difference I could find is the cool one has the radiator fan drawing in fresh air through the radiator towards the engine, while the hotter one pushes hot air from the engine through the radiator. Both engines have the cooling system of a JD 2640 tractor. Why would the hot one be setup this way ? Is it common to be able to interchange the fan air flow direction on these engines ?
cvphoto132426.jpg
 
Equipment if often set up to blow out when their is the possibility of sucking debris into the radiator. Our D2 Cat and C4 Tree Farmer had both fans. A reverse fan also keeps the operator cooler.
 
This is what we use to crop the tobacco with to be sent to the barns and cured. We normally crop the 1st time by hand on Long Mfg harvesters, then the of rest of the several pullings are done mechanically. The heads on these machines can be swapped out for either multi pass heads which you go over it several times till no leaves remain, or the cutterbars can be installed to totally strip the stalks clean.
 
What popped into my head, I know, could be dangerous, is that are both fans exactly the same? Rotate the same way, same angle on blades, same belt pulley slzes?
 
Hope you resolve any issues.

For certain, those are some interesting looking critters to somebody from tropical MN. :)
 
Jim I have had both machines cooling systems apart in the past. The blade count and rotation is the same. I know some history on the front machine in picture that runs cool. The PO were meticulous with it. The back one I bought off an auction and wonder could some engine parts swapping went on prior to sale yard delivery ? I have suspicion of the engine coming from a tractor or possibly a 6000 hiboy and have the wrong direction fan blades ? It doesn't have the Dubuque power unit code on the tag like the other one does. JD dealer is stumped on it.
 
It seems to me one could see a difference in the fan itself. Another consideration that may be crazy, what about the thermostats? I'm just throwing things against a wall to see if anything sticks.
 

Coolant absorbs the heat air takes it away I would be suspicious of the air flow on the one that runs a little hotter... With no indication of compromised head gaskets, radiator restriction are a malfunction thermostat I would make sure the belt has the grip to spin the fan and water pump.

Why would it push air toward the front its not like its down in the crop/weeds. high as it is I see no need to push the air flow.
 
My dad had 2 fans for his 350 crawler, the summer one blew the hot air out the front, otherwise the operators station would get way too warm, in the winter it was nice to have the warm air, he used it for logging as cold as -40F. I don't think it ever ran warm, it was a good machine, 3 cylinder diesel.
 
Was there a pusher fan used on old fords to prevent hot air from the radiator hitting the gas tank causing gas to boil?
 
If you have a pusher fan, you should have no screens in front of radiator, but a screened engine compartment. So it seems that you have one running backward.
Same differences than early/late Deere Titans.
 
Are you checking temp with an infrared thermometer or just using the gauge on the machine? Could be a gauge that's a little off.
 
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