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Noise, idler pully rubbing against middle blade

John deere 261 grooming mower: noise, idler pully rubbing against middle blade pully, this don't look right? I can't see that anything is bent, but there should be clearance there I would think. bought used, don't have a manual. have been using 3 yrs now. first time I have taken top safety belt guard off and saw pulleys touching.

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  • Anonymous Mar 25, 2014

    mower vibrates
    driveshafter looks good.
    could it be one of the three blades or pullies?

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Unless there is some other means of placing tension on the deck belt, I would say that the idler pulley does. If the idler pulley is on a pivot arm, there is a spring that typically is attached to the pivot arm, near the pulley, that attaches to a post or some other part of the deck, that creates the tension on the belt. Check the belt for proper tension.

Posted on Aug 01, 2009

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Posted on Jan 02, 2017

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I HAVE A JOHN DEERE 135 RUNS WELL ..BUT WHEN THE BLADE IS ENGAGED IT STOPS THE MOWER.. WHAT IS THE PROBLEM ?


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BLADE DRIVE BELT ADJUSTMENT


Well, most riding mowers have a "pully idler", meaning once you have the belt on there (and it is the RIGHT size), the idler automatically gives the belt tension when you engage it (in fact, the idler pully is what IS engaged when you engage the belly mower).

Couple things to check (super simple):

The Belt. Look to see if she is wore smooth out.
Sometimes....they WILL stretch on you, instead of busting/coming apart, and give you noise (when she is engaged, but wore out enough to flop around a little)

The Deck Blade Bearings. Straight away, that is what it sounds like, or bent blades.

Check your Blade Bearings (super simple):
1. Pick up your deck to the highest high setting (mower off, just sitting).
2. Reach under, and grab your mower blade (do this for both sides), and TILT your blade UP (meaning, don't LIFT the blade straight up).
Seriously, jiggle it at a TILT. If you feel some slack in the bearing, the bearing IS shot. Straight up and down is most of the time OK, IF it is VERY little play on your blade bearings. As you do it, look at your belt pulley directly on top, if you see that pully bobbing....

However, if you grab one side of the blade only, then tilt the blade up, and she moves.....
Bearings need replaced, both the upper AND lower bearings PER blade.

They are not hard to replace, and not expensive either! (Though unfortunately, most are "sealed" junk nowadays!)

Bad Bearings show up (make themselves known) in only a few ways: Tons of Noise (grinding, squealing) & Vibration.

Go check them thar Bearings!

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