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4020 Fan

D

David G

Well-known Member
Is there a fan with more volume available for the 4020? The original fan is 5 blades. It runs hot at full power.

Thx
 
It's my understanding M&W supplied an HD fan for use with their turbo kits. Where you'd find one of those is another matter.
 
I think I've seen one of the fellows on the forum here mention that they used a larger fan(more blades) from another model of JD tractor...........not sure what model though??
 
Are you relying on the gauge to tell you it's running hot? (I know, sounds like an ignorant question) Operating temperature on every one I've ever seen was about half way between where-you-think-it-ought-to-be and hot.
 
M&W had a fan and shroud plus 20qt pan that were used .I thnk some combine fan and shrouds work. I have seen several cases where the radiator needed boiled out. M&W also had a bigger radiator if I remember right.
 
I just had this thought since I'm about ready to paint my 4010 and I've been looking at those grill screens. How am I going to prevent from plugging up them little holes with paint. If those hole grt plugged kinda screwws up that air flow,maybe 25% that would cause overheating???
 
The original 4020 fan is a 21" 5 blade fan. The M&W fan used with the turbo kit is a 19" 7 blade fan. I use a 2940 fan which is 21" 6 blade (it moves more air than the M&W fan) and still use the original shroud. I also installed a 4010 water pump pulley which is smaller in diameter which will increase the fan speed.
 
Yes it will, when you paint the side screens have a blow gun ready and blow them down before the paint sets, this helps, and also go light on the paint too..
 
There is a large chance the radiator core is pluged, with no history you would be ahead to have it re-cored, it makes a 'major' difference on keeping them cool,,could save an engine,,heat kills them..
 
Boiling a rad is a waste of time and money. All you have left after all the time, work and money is an old thin rad.
Go for a re-core or new.
 
Many people have painted radiators with paint. They should use rad paind as it lets the heat transfer better. I can not remember the exact number but I think it is something like 16 degrees warmer they will run when painted with paint. The paint we use to use was radiator and chasis black which was availabile from auto parts stores.
 
Check the thermostats, they may be opening too hot. I've had them fail on me in my 4020 and other engines, both ways.

The 4020 gas and 4020 diesel used different water pumps and radiators, with the gas have a greater cooling capacity because it generates more heat from not being as efficient. So the gas radiator has a thicker core and the water pump moves more water. Mixing up water pumps could cause trouble on a gas tractor with a diesel pump and/or radiator it might not have enough cooling.

Mixture and timing also significantly affect the engine's operating temperature.

But check the thermostats. Take them, out put them in a pot of water on the stove and monitor the water temperature with a good cooking thermometer (an instant read one handy for check A/C, soil temps, and thermostats costs about $7 at the hardware store these days) to see at what temperature they open.

And if the radiator isn't popping off steam it may not be too hot anyway.

Gerald J.
 
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