2020 Yanmar SA424 PTO Noise

   / 2020 Yanmar SA424 PTO Noise #1  

gojeepin21

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Jan 13, 2021
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5
Tractor
SA424 Yanmar
Want to know if anyone has a 2020 SA 424 that makes at loud clanking noise when you turn in the pto and if this is normal. It doesn’t sound normal to me I just want to make sure I’m not missing something. The transmission fluid is showing where it should and dealer did all the prep so I would imagine it’s been tested before I did it’s never been connected any attachments I turned it on to make sure it works . Let me know your thoughts
Thanks
 
   / 2020 Yanmar SA424 PTO Noise
  • Thread Starter
#3  
The noise is at lowest idle I will try to add a short video clip
 
   / 2020 Yanmar SA424 PTO Noise #4  
My 424 pto makes a clattering noise at idle when engaged.
It gets quieter as rpm’s increase.
 
   / 2020 Yanmar SA424 PTO Noise
  • Thread Starter
#5  
I have at the lowest idle when it’s engaged.
 
   / 2020 Yanmar SA424 PTO Noise
  • Thread Starter
#6  
Thanks i tried to rev up engine to see if it goes quieter. I have a appointment for the 50 hour service and they will check it out while under warranty.
 
   / 2020 Yanmar SA424 PTO Noise #7  
This may be a month late, but I have a 2015 sa424, and I have always had a bit of a clank when engaging; I don't like it either, but I'm oddly comforted that you have the same issue, as I had often thought mine was abused at the new-tractor lot before it was purchased. I think there is a bit of play built in as part of the hydraulic coupling to the rear PTO output shaft, but I have not seen an exploded diagram to verify. It will be good to see what your 50 hour checkup indicates.

One of the best investments I made was a slip clutch on the rear PTO. Because of that aforementioned play, if I engaged or disengaged too quickly, the bounce was likely as not to add momentum that sheared off my pins more frequently than I thought was normal. Going to a grade5 shear bolt seemed like it defeated the purpose, I would much rather keep replacing pins than replace drivetrain components. But it always made me cringe.

Enter the slip clutch.

The downside is that you have to carefully make very sure that your PTO shaft doesn't bottom out on each implement, because it makes the PTO output much nearer to the implement, so a too-long shaft is going to damage something when you go through the minimum (at parallel). So when you install each implement, raise it up to parallel, and compare the length of the shaft next to the installed clutch. If it's too long at its shortest, you'll need to take a little bit of length off th shaft until it has sufficient clearance. (If you are using an add-on quick-hitch adapter, this may not be an issue, but you should repeat the procedure to make sure you have good shaft length with and without the 3-pt quick-hitch).

Also it makes it hard to glance at the fluid level window from a distance.

Now the upside. The transition is much smoother on my 4x10 chipper and my 4' brush hog, both of which ave a lot of momentum in either direction. With the clutch, it may slip just a bit on startup, then catches up immediately. If I stuff the chipper with a branch that is too much, it may stall the tractor, but it's a gradual stall, so I have a chance as it's bogging down to pull the branch out, and I know that the sliding force is much easier on things than zero-yield components.
 
   / 2020 Yanmar SA424 PTO Noise #8  
Want to know if anyone has a 2020 SA 424 that makes at loud clanking noise when you turn in the pto and if this is normal. It doesn’t sound normal to me I just want to make sure I’m not missing something. The transmission fluid is showing where it should and dealer did all the prep so I would imagine it’s been tested before I did it’s never been connected any attachments I turned it on to make sure it works . Let me know your thoughts
Thanks
I just bought a 2022 sa324 and having the same issue. It sounds like 2 gears that are not synchronized if that makes sense. Did you ever get yours figured out
 
   / 2020 Yanmar SA424 PTO Noise #9  
I just bought a 2022 sa324 and having the same issue. It sounds like 2 gears that are not synchronized if that makes sense. Did you ever get yours figured out
If this is only when engaging and goes away once you increase speed it is not a problem. If it continues when increasing speed you should contact your dealer.
 
   / 2020 Yanmar SA424 PTO Noise #10  
If this is only when engaging and goes away once you increase speed it is not a problem. If it continues when increasing speed you should contact your dealer.
I contacted the dealer and Sent in a video. They said its a transmission issue. Only 5 hrs on it. Said no noise should be heard when engaging the pto
 

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