John Deere 3720 Air Conditioner Fix

   / John Deere 3720 Air Conditioner Fix #1  

JDneophyte

Member
Joined
Oct 7, 2011
Messages
45
Location
Chicago & Wisconsin
Tractor
John Deere 3720
After ignoring the A/C for two+ years due to reliability and high pressure switch cut out issues, I decided to fix this once and for all!

Any of you guys who use your tractors in hot dusty conditions....know the AC is mediocre at best. It’s a bad design (undersized condenser, battery blocks air flow, exhaust blows debris into front of tractor) and sitting in the fish bowl at 90+ sucks! Here's what I did:

Relocated the battery to a bracket I made, upgraded the battery to an Optima, mounted to the drivers side loader support -

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To increase air flow over the condenser, I added a small 8 amp fan (the altenator is 40 A)...blows all the dust, clippings through the condenser, dissipates the heat much better than the engine fan alone.

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I ran the tractor for 8 hours today (raking hay) in 90+ heat......cab stayed cool, condenser was clean as a whistle!

Having fun!
 

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