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post #1 of 3 (permalink) Old 08-18-2019, 01:35 PM Thread Starter
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John Deere LA115 Mower Grinding Noise

I was getting prepared to mow my lawn and when I turned on my mower, It made a grindimg noise. It goes on about every 5-10 seconds and lasts about 1.5-2 seconds. If I engage the brake, the grinding stops. What is the problem? I mow about 2 acres every weekend, and it is on a hill.
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post #2 of 3 (permalink) Old 08-19-2019, 01:35 AM
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Might be the transmission drive pulley getting wobbly and chattering. Also check your drive belt for cracks and wear and the idlers on the drive belt. Might be an idler bearing going bad too.


I have a pulley and drive shaft setting in my garage to put on my LT150 K46 hydro as it is getting pretty noisy but it is not really constant. Kind of depends on the load on the transmission. When you put on the brake it shuts off the drive belt rotation to the transmission. So the noise is likely generated in there someplace.

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post #3 of 3 (permalink) Old 08-20-2019, 05:46 PM
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Everything Mark said Hopefully it's one of the engaging idlers midship. If it's the pulley on the trans input way aft they are a royal PIA to get to on those series machines. You really need to drop the trans to do a proper job of replacing. It's a sprocket pulley designed to be softer than the input shaft teeth of the trans. It'll fail before allowing damage to the trans. On my LX188 mine went out with no warning or noise, just stopped moving. Completely stripped out after 19 years so I was pretty upset You can reach up in there and wiggle the pulley under the fan, it shouldn't have much movement.
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