Posted by DRL on August 04, 2010 at 18:05:52 from (24.206.128.104):
In Reply to: JD 620 running hot posted by TWS on August 04, 2010 at 17:46:47:
Had you used this tractor to bush hog in hot weather before?? You may just be working the tractor hard enough now to bring it up to temp. If you had used it to bush hog in hot weather before and it ran cooler I would do the following:
I would first check to see if there is any trash in front of the radiator. Brush hogging does tend to stir up trash that is sucked into the radiator. You might take a hose and nozzle and spray from the back side of the radiator and wash out all the dust, dirt and trash. Next, I would check to see that the impeller in the water pump didn't come loose from the shaft. Also check to be sure that the clutch facings on the fan aren't worn enough to allow the fan to spin freely on the shaft.
All that said, 200 degrees isn't all that hot for the older JD's. In fact, it was necessary to run them that hot or hotter for proper combustion of the power fuel. Don't know if it is too hot for the newer 20 series tractors or not.
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