How to easily change deck belt on John Deere X300 M154621

How to easily change the mower deck belt on JD X300. Replacing the mower deck belt on a John Deere X300 series lawn tractor with the Edge 42 deck. John Deere belt OEM part number M154621. Step-by-step tutorial. Similar process for other X series John Deere tractors, and other Edge deck widths.
Step 1: Check serial number and verify correct belt part
Step 2: Remove mower deck
Step 3: Remove spindle cover, guides, tension spring, and old belt
Step 4: Use belt path diagram and install new belt
Step 5: Re-install spindle cover, guides, spring
Step 6: Re-install mower deck
Step 7: Test operation

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Published May 23, 2023
Current subscriber count at the time of upload: 15,661
Purple Collar Life is a privately owned channel and part of Education Situation Specialists.

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0:00 - Intro
1:22 - Step 1: Check serial number and verify correct belt part
2:28 - Step 2: Remove mower deck
3:40 - Step 3: Remove spindle cover, guides, tension spring, and old belt
6:51 - Step 4: Use belt path diagram and install new belt
9:02 - Step 5: Re-install spindle cover, guides, spring
11:14 - Step 6: Re-install mower deck
13:04 - Step 7: Test operation

[rebekah]

Thank you for this video! It was clear and concise! My belt came off and I was able to get it out back on quickly and easily by myself, thanks to you! I ordered a new belt and if my old one comes off again, I will replace it.

[RustyMayoo]

Men like you keep the world turning 😂 great video!

[karenez]

Great video, very helpful, thank you!!!
Fyi, our JD supplier sold us the wrong belt in the right packaging. Very frustrating. Ha ha. Got it replaced and went on like a dream. One other note: did not need to remove the spring. My guy did that the first go round; it was very difficult for an older guy. With the correct belt, he got it on perfectly with no need to touch that spring.

[B]

This video was great!! My JD OEM belt snapped and this video made replacing it super easy! I also found the pulleys to be overtightened, 🤷🏻‍♂️ But, THANK YOU!!

[zackwhatley]

I have a JD x304 and have had to replace this same belt 7-8 times. Have used after market as well as OEM belts. The OEM is costly but is better quality belt. You can buy aftermarket and get two for same price as the OEM but who wants to change this 2-3 times a year. This watching this video its best I have seen in explaining the correct steps. Thanks

[kevinkahikina]

Excellent & Informative! Thank you for the tutorial, the operator's manual is a futile attempt at best! Happy mowing!

[triciatrunek]

thank you....i honestly watch this every time i have to change my belt....

[DarleneWortham]

Thanks for posting this video. I too bought an after market belt that only lasted for about 3 mowings. I was changing oil, filter and blades so thought I would put a new belt on at the same time (still had the original John Deere belt) and was very disappointed how soon the belt broke. I have ordered a John Deere belt to replace the after market belt. Hopefully will last as long as the original belt.

[gregfletcher]

Thank you. Used this today to change my belt on my X300. Your video walked me step by step right through it.

[davida.p.]

Very easy install! 😎👍 And good looking mower too! I do like those John Deere mowers! Thanks for sharing, Chad!

[jerrygentry]

Good tutorial. I learned the same lesson with lawn tractors - OEM parts are the only way to go. You actually spend more with cheap parts.

[watershedoverlook]

Good job Chad, really clear and concise. I must say that after watching this, and after having had to replace the drive belt on my Deere GT235, I am convinced that JD (and most other modern mower brands) just like to make belt changing overly-involved and complicated. They could learn a LOT from my 70's Wheel Horse tractors. I can literally remove the deck, change the belt and reinstall the deck—without tools, mind you—all in about 5 minutes.

(Having typed this, I realize that I sound like the pair of grumpy old men Muppets that live in the theater balcony!) 🤨😅

[rsmith]

Very clear video. Went to cut my lawn and the pto did not engage. The belt has slipped off. This video should make fixing it a lot easier, Thanks

[moci]

Excellent video. The JD manual is a mess. This video makes it so much easier. Thanks

[anthonypaul]

Thank you for your very helpful video. Much appreciated!!!

[mkisor]

Thanks so much just changed my belt and blades pretty easy

[Rob_and_C]

My mower is the same i just replaced the belt and blades, but when i went to test it i smell a burning rubber smell. Is there a belt tension adjustment or is that just that tensioner puller... about to take another look it it. Any info would be great

[jeremsmith]

So how long did you mow with that belt that you took off I can mow 4 times and my belt that is not the john deere you put on looks just like the belt you took off and it jumps off so is it a belt issue or what

[helichuck]

Do you have a video for deck leveling?

[matthewnowack]

Where do you guys get cheaper OEM parts from.