[mpreiss]

I have a x300 (2013?)JD riding lawn mower and can someone give me the deck belt size, part number for a 42 inch? I've ordered the wrong one that said it'd fit but is too small.

 

[X300owner]

I have the 2010 X300 with 42 inch deck and used this one V Belt – Mower deck M154621 $52.79
Went to Deere dealer with my serial numbers and they looked it up for correct fit.

 

[PA318Guy]

I recommend you take your serial number to the dealer and let them get the correct size for you. There are several 42" decks that were used on the X300 here are maintenance reminder sheets for a few:

X300_42Edgedeck.fm (deere.com)
X300_42Mdeck.fm (deere.com)

 

[mpreiss]

Thanks for the answers. I did order the right belt but but they sent the wrong one and I agree about taking the serial number in.

 

[mpreiss]

Okay so I put on the correct belt and I sharpened the blades some but now the cut is horrible with the drivers side ok but the right side not cutting grass well at all. ggggrrrr!!!! any ideas where I went wrong? wrong bevel on sharpening? belt not on correct?

 

[Herd of Deeres]

If one blade is cutting OK it makes the belt the less likely culprit. Maybe swap the blades and see if the bad cut moves to the other side?

 

[mpreiss]

If one blade is cutting OK it makes the belt the less likely culprit. Maybe swap the blades and see if the bad cut moves to the other side?

Yeah is possible but why would one blade cut so much worse now? I slightly sharpened each of the blades the same. You know the bad cut I'm talking about, it just kind of swirls the grass but doesn't really cut it cleanly. I'm almost just ready to trade it in for a new one. Thanks for the reply, I'll take a good look at it when I get a chance.

 

[dave_r]

maybe double check that both blades have the same orientation (ie, that one isn't upside down)?

 

[mpreiss]

maybe double check that both blades have the same orientation (ie, that one isn't upside down)?

Thanks for your reply...No I just did a little filing on the blades while still attached. I think I read to be careful sharpening the blades as they have a certain bevel/cut that if it gets changes will not cut well but I don't think I did that. It's really kinda strange as all I really did was put a new belt on. I have not had time to take a good look at it but soon I will. Thanks

 

[greenmachine]

If the blades didn't come off the deck then that takes me back to the belt, in particular the routing of it. It's not easy because the manual usually doesn't have very good pictures, but I'd look carefully to make sure that the way the belt is routed on the deck matches what they show in the manual.

 

[mpreiss]

If the blades didn't come off the deck then that takes me back to the belt, in particular the routing of it. It's not easy because the manual usually doesn't have very good pictures, but I'd look carefully to make sure that the way the belt is routed on the deck matches what they show in the manual.

I agree, I'm almost sure it's gotta be that i put the belt on incorrectly, I'll find out soon. Thanks for your input.

 

[X300owner]

I was afraid when I took the deck off all the time that I wouldn't get it back on. So I found this picture of the belt routing. I also took a picture on mine.

 

[mpreiss]

Well it was the belt was not on properly, just one loop was under instead of over. Works fine now, thanks for the help

 

[dave_r]

thanks for coming back and posting what the fix was.