John deere 125 drive belt blowout
OK folks. New on here, not new to fighting lawn tractors. I lost a belt as I was finishing the backyard yesterday. I ran over a rubber mat and the already worn belt broke.
But I had a spare and went to putting it on. Used my operators manual, diagram on the mower and diagram on the belt package.
Put it on and didn't finish the front yard before the new one burned up and broke off..
The old belt snapped but was still on so I put the new one on exactly like the old. All the pulleys turn freely. There were no sticks in the pulleys and the belt cover was off.
If the deck was set at 2 or below the drive would engage and disengage as it should. If I raised it higher the drive would start running without engaging it.
I adjusted the belt tensioner to no slack but not tight as the manual says.It seemed to help some as the deck could be raised and the drive would stay off. I'd cut some, stop and inspect then cut some more. All the pulleys are turning. Its always garage kept and never washed(so the bearings on the deck should have never been wet).
How tight is the tensioner spring supposed to be? What about the brakes on the blade pulleys? The new belt went on just like the old. It got a groove burned in it so I ran it trying to finish before it rained and blew the rest of the belt off(didn't get finished either).
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