Posted by Bob M on April 19, 2011 at 06:51:11 from (67.240.171.41):
In Reply to: Farmall H PTO posted by David G on April 19, 2011 at 05:58:09:
Slow turning when disengaged is caused by viscous drag of the gear lube "dragging" the PTO shaft around. (With the engine shut down manually turn the PTO - you will feel the viscous drag.)
Now if the transmission has SAE #140 gear oil in it, draining, flushing and refilling with lighter 85W-90 gear oil MIGHT stop the shaft turning. But it also might not....
Aside from the safety issue, a drifting PTO shaft causes no other problems. However never grab the shaft on ANY tractor while the engine is running!
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