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Need help diagnosing problem with 7-year-old John Deere zero turn mower
Posted on 5/6/25 at 12:06 pm
Posted on 5/6/25 at 12:06 pm
I went to cut my grass this morning and noticed that when I engage the left side all the way forward I feel a strong vibration and that the wheel isn’t spinning as fast or powerful as the right side.
What steps can I take to trouble shoot it and has anyone experienced a similar issue? I change the oil in it every season and have replaced the blades before. Other than that, I haven’t done any maintenance beyond hosing off the grass and keeping the deck clean.
What steps can I take to trouble shoot it and has anyone experienced a similar issue? I change the oil in it every season and have replaced the blades before. Other than that, I haven’t done any maintenance beyond hosing off the grass and keeping the deck clean.
4
Posted on 5/6/25 at 12:17 pm to Oilfieldbiology
it it’s that old remove and replace the blade spindles
Posted on 5/6/25 at 1:25 pm to Oilfieldbiology
Make sure your hydraulic fluid isn't low.
Posted on 5/6/25 at 1:29 pm to Oilfieldbiology
Check for debris in the pulley grove first. I get that often from flying objects.
Posted on 5/6/25 at 7:17 pm to Geauxkart
If the drive motors are serviceable, change the hydro oil and filters
Posted on 5/6/25 at 10:17 pm to Oilfieldbiology
Change the drive belt.
It's quite common for one side to pull more when the drive belt is loose or worn. This is due to the routing of the drive belt and and one pulley gets more power than the other when loose.
Based on the age, replace the deck belt also, you generally have to remove it anyway to get to the drive belt.
Both my Dad and brother experienced similar issues with identical 7-10 year old Gravely ZTR mowers. New drive belt, back to like new.
It's a little bit of a PITA to change so if you can't DIY take it somewhere.
It's quite common for one side to pull more when the drive belt is loose or worn. This is due to the routing of the drive belt and and one pulley gets more power than the other when loose.
Based on the age, replace the deck belt also, you generally have to remove it anyway to get to the drive belt.
Both my Dad and brother experienced similar issues with identical 7-10 year old Gravely ZTR mowers. New drive belt, back to like new.
It's a little bit of a PITA to change so if you can't DIY take it somewhere.
Posted on 5/7/25 at 8:52 am to AndyCBR
a chain fall to lift the mower up from the front and rock it back on the rear tires helps greatly with this
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