My 1811 had a bad hydro whine when I first got it. I changed the filter and that didnt help much. Then I decided to replace the fluid and filter again and now its much more quiet than it was and seems to respond better. I used hytran ultra and a napa/wix 1410 filter. I have also owned a 1450 and a 149 and their hydros seem quieter than the the one in the 1811. I would change the fluid and filter again and see if this helps.
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Cub cadets 100, 128, 582, 1050, #2 tiller, 42" blade, 2-10" Brinly plow, 12" cat0 Brinly plow.
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