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JDX300rao 08-11-2019 12:58 PM

John Deere X300
Hi, I need help with my JD X300, the cutting belt doesn't last more then 2 months. It snaps with a clean cut, no sign of rubbing. The pulleys spin freely. However the biggest one moves about 1/4 inch before I hear the blade move, do you think this could be the problem? If you are facing the front of the machine, it is the pulley holding the blade farthest from the bagger shoot.The belt brakes right after I have reversed the machine, go forward and engage the cutting deck. Maybe use the machine 8-10 times and belt snaps, gone through 3 already, on 4th. Thank you, Robin

jgayman 08-11-2019 09:20 PM

Re: John Deere X300
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That is definitely not normal. The belt should not be breaking like that and the pulley should not turn without the blade turning. What deck do you have? It looks like there are 6 different decks you could have.

JDX300rao 08-11-2019 11:17 PM

4 Attachment(s)
Thanks for your response. It is 42 inch deck. Not sure exactly which one. The first photo shows two broken belts, pretty clean rip. The second and third photo are under deck, cutting blade removed where I see friction showing where the blade meets the pulley rod. Do you think this could cause it? There is a little cup that comes off the rod, do I just replace that? 4th photo cup in my hand. Or am I totally off with this idea?

JDX300rao 08-11-2019 11:20 PM

I got 5 years out of the first belt, since last August replace 3 and on my fourth one. To top it off I live in New England, no mowing Nov - April.

jgayman 08-12-2019 12:36 AM

Re: John Deere X300
1 Attachment(s)
It looks like the have the 42X deck (without tensioner handle). According to the parts breakdown shown below, the little cup comes with the spindle shaft (#20). JD Parts lists it as AM141110 ($34.34). Always verify the part number with your dealer before purchasing.

JDX300rao 08-12-2019 06:57 AM

Thank you so much for your help, I appreciate it!

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