Mahindra 2816 pto speed fluctuating

VroomVroom · Sep 8, 2020

Well I got an hour to look at the tractor. I only heard the knockin once or twice. I noticed an adjustment in the linkage to the control arm that engages the pto. So I removed the pin and moved the lever buy hand while the linkage was unhooked. One thing I did notice was when the handle up by your left hip was all the way back in the disengage position, and the linkage was disconnected at that time from the control arm that engages the pto clutch, I could move the control arm a touch more and it felt almost like a detent position. Almost like when it was linked together, it wasnç¨š quite in the disengaged position. So I put the control arm back as far as it would go to ensure the pto clutch was fully disengaged and adjust the end of the linkage to allow me to put my pin back in so I could use the lever by my left hip. I found that I then could not fully engage the pto then. I had the tractor off and tried turning the pto and it was not engaged and could turn it in both directions. So I had to put the control arm all the way forward(engaged) and move the hand lever forward to the engaged position and adjust to allow me to install the pin connecting the linkage back up. I tried keeping count of the turns but soon lost it. Even though I marked it all. Anyway, I may have a turn in the difference as it do seem to go fully forward in the engage position. It seems fully disengaged as the pto will turn both ways when the tractor is off. I just know I could get it back a hair more if the hand lever did not come to a stop on the fender slot.
I hooked up the snowblower, 6 foot and ran it at 540 for twenty minutes. Slowing rpms down occasionally, clutching and then engaging again and ramping rpms back up. I did not notice the rpms change but I was not watching for it as much. I may run it again before I leave. Maybe the lever needed a hair more in the engage position as it feels like a cleaner stroke , up until in the fully engaged position on the fender handle. It seemed a bit mushy and like you couldn’t get it to fully engage on the fender handle leaving a hair before handle should of come to a stop in the fender or a detent position. Wish I had more time with it. But it seeemed fine. I heard one knock I thought

ptsg · Sep 8, 2020

You sure made some progress.

Then again, without a service manual to see how things are built, it's hard to diagnose.

Maybe all it needed was a readjustment. Hopefully it works out fine.

K5lwq · Sep 8, 2020

I would definitely say you made progress. I have a question though, when do you or did you hear the knocking sound? Was it when you lowered the RPMs to disengage or clutch? Or was it at operating RPM?

VroomVroom · Sep 8, 2020

Honestly it’s hard to say for sure. But I think it was at about 1800 or around. Most of the time I run it around it’s at 1500-1800. 2370 is pto speed and quite a bit faster. When I first heard it I was squatting behind the tractor not using the pto. Though I think I was running the tractor about a month before running the snowblower. I do think the lever felt spongy the last 1/4”. So maybe I did change adjustment. I lost track of my turns as I adjusted it first to ensure it was fully disengaged but then I couldn’t fully engage it. So I put the lever into the fully engaged position and turned the linkage end until I could get the pin back in. I might of changed it by a turn or so as the lever now goes forward and stops as it just touches the fender in “ fully engaged. I’m hoping it’s all it was. I tell you, there isn’t much rotational movement in that control arm from disengaged to fully engaged. I’ll post pictures tomorrow as I marked it . I still would like to run it more. I have to leave tomorrow but maybe I can run it again Due to circumstances the past few years I couldn’t use it much and I’d say this winter and onward I’ll use it quite a bit more once the garage is finished. I was going to get a post hole auger and first thing I hear all the chatter in the back end. Also, I did adjust the clutch too.

K5lwq · Sep 8, 2020

I understand. The reason for the question is that it is not uncommon for a overrun clutch to make some noise if the RPMs are lowered quickly. The momentum of the implement will cause it to make some noise. I always try to slowly bring down the RPM on my Kioti for this reason. Might give that a try.

This does not explain the intermittent slowing of the PTO though. But the linkage adjustments sure seems plausible. Hopefully you get to give it another try before you need to leave. Good luck!

VroomVroom · Sep 9, 2020

K5lwq said:
I understand. The reason for the question is that it is not uncommon for a overrun clutch to make some noise if the RPMs are lowered quickly. The momentum of the implement will cause it to make some noise. I always try to slowly bring down the RPM on my Kioti for this reason. Might give that a try.

This does not explain the intermittent slowing of the PTO though. But the linkage adjustments sure seems plausible. Hopefully you get to give it another try before you need to leave. Good luck!

Yes, I have never heard it. But I read here somewhere that the one way bearing or sprag clutch or whatever the proper name is , is a little better than the newer models that are silent ? This one should make a ratchet sound though I have not heard it. I usually slow it down so it probably does not have enough momentum. Or I just do not hear it with the engine running.

I did have it going this morning. Ran the snowblower for another 20 minutes. I did not hear it. I wonder if it was that the clutch lever was not fully in position. Although it seems to me that when I first heard it a month ago I was not using the pto at all. But like I said, the lever moves maybe 3 inches from engaged to disengaged. But the control arm that turns from the linkage moves only very slightly. I could see if the lever was not slid fully forward or back that it could make a difference if the clutch is engaged or slightly in between.

The lever seats good when pto is off. And slides to a stop when pto is running more crisp than before. Anyway, right now I don not hear it. In a few weeks I will run it again and I値l know for sure once the snow hits