Posted by Bob M on October 04, 2011 at 18:15:27 from (69.207.87.100):
In Reply to: towing a tractor posted by mb58 on October 04, 2011 at 13:03:46:
Should be OK to tow a tractor a few miles at speed not exceeding road gear speed (20 mph or so). But keep in mind there are a LOT of internal parts - bull gears, differential, brakes, differential bevel gear set and tranny output shaft all spinning whenever the rear wheels are turning. And rolling faster than normal road gear speed spins these parts faster than the designers intended.
Also some tractors - the IHC 300 for sure; not sure on the others - depend on a spinning transmission countershaft to lube the upper (mainshaft) bearings. But when towing on the rear wheels and the tranny in neutral, the countershaft remains stationary. Consequently there's no lubrication to the upper bearings under these conditions.
This is OK for a few miles of towing (I've done it many times). But for extended distances - or at higher speeds - you're asking for trouble.
A better solution is to back the tractor onto the dolly and tow with the FRONT wheels on the ground. Now you are limited only by the speed rating of the front tires. Also you are not causing wear to the tranny internals nor the (expen$ive) rear tires.
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