B2620 PTO questions

[grizzjeeper]

Any time I move PTO lever from 540 to neutral I get horrible grinding. Happens occasionally moving from 960 to neutral as well when mowing. Is there an adjustment somewhere? ANd yes clutch is depressed. When there is no load on PTO its not an issue... I am perplexed. No matter how gently I move lever it seems to catch...

Any thoughts? Brand new

 

[s219]

Note sure if this is your problem, but I used to wait until the implement stopped rotating before shifting. So I'd push clutch in, idle down engine while waiting for implement to slow down, and then shift PTO into neutral once the implement shaft came to a rest. If you still get grinding then, I'd probably get it checked out.

 

[628pm]

I use my PTO the same as S219, no grinding do it that way.

 

[grizzjeeper]

Ok so as long as i know that you cannot move the PTO lever to neutral until implement stops I am ok. This is the only kubota I have ever owned I needed to do this with. Waiting for a bushhog to stop before moving pto lever or releasing clutch is a PITA.

Thanks.

 

[JCByrd24]

Instead of going slowly try quickly moving lever to neutral. Once you are to neutral there is nothing to grind whereas in between is a bad place to be. There should be little resistance to this coming out of gear. If there is or you get grinding sitting in neutral take it to the dealer.

 

[s219]

The thing to remember is that the PTO gears surely don't have synchros, which is what makes it possible to shift an automotive transmission in/out of gear at arbitrary speeds while shafts are turning. Without a synchro, you will only get a grind-free shift if you can match the RPM of input/output shafts correctly. It's possible to do but takes experimentation and practice. Otherwise, wait for the shafts to stop rotating.

 

[prevent]

Push clutch in and wait for implement to slow down...

I throttle down to idle, clutch in see the implement has stop moving then i shift the lever to whatever i need it to be


I get grinding when i forget to clutch in or when i clutch in but don't let the implement stop... only takes like 2-3 seconds.

long healthy tractor life > 5 seconds of my time

 

[Paystar]

Mine doesn't do that? I just put the clutch in and disengage.
Something not right with yours.

 

[s219]

Mine doesn't do that? I just put the clutch in and disengage.
Something not right with yours.

What implement are you running? That has a lot to do with it. When I run my woodchipper, the massive flywheel puts quite a load on the PTO shaft. In fact, if you were to suddenly throttle back the engine, the chipper's flywheel would hold the revs up.

 

[kbplaza]

Mine never did that, I could just push the clutch in at any rpm and pull it out of engagement. Don't shift slow! I would get it checked out because that would be a royal pita to have to wait till the implement to stop to disengage.

 

[tractchores]

What implement are you running? That has a lot to do with it. When I run my woodchipper, the massive flywheel puts quite a load on the PTO shaft. In fact, if you were to suddenly throttle back the engine, the chipper's flywheel would hold the revs up.

x2 I've noticed the same thing with my chipper. I throttle down to idle slowly allowing the engine to slow the spinning, then depress the clutch. If its still spinning you get grinding, if its not you don't. I don't know for sure, but I don't think there is a brake on the PTO's on these machines, so with the clutch in it spins freely with very little friction (that's why you can turn it by hand to line up the spindles when attaching something)

 

[prevent]

Hmm, now im having fuzzy thoughts if it does that or not... but i do know i don't shift the mid pto off until i see the mower stop spinning

I'll have to double check next time im out at the farm. only implement i have for pto is MMM

 

[Paystar]

What implement are you running? That has a lot to do with it. When I run my woodchipper, the massive flywheel puts quite a load on the PTO shaft. In fact, if you were to suddenly throttle back the engine, the chipper's flywheel would hold the revs up.

Wallenstien BXM32 chipper/shredder, 60"mm mower, 51" rear snowblower.

 

[JCByrd24]

Glad to see someone else echo'd my response of "do not shift slow"...Coming out of gear with a quick and confident motion of the lever should be no problem even with an implement still spinning and the clutch in. Going slow in the same situation is much more likely to grind.

 

[grizzjeeper]

Its not a slow shift scenerio. It will continue to grind until the implement stops. Its as if there is not enough clearence in the neutral position and is trying to engage the rear 540 to 960.
Its like its caught between ranges and nicking the 960 side or the 540 side and no in between until PTO is stopped.


Another thing I just notices is with clutch in I can still move tractor for another few feet before the hydro is disengaged... hmm. I am using a bush hog so silimar to a chipper the rotating mass keeps turning. I have never expirienced this on ANY tractor and I have had several.

 

[buck boost]

Its not a slow shift scenerio. It will continue to grind until the implement stops. Its as if there is not enough clearence in the neutral position and is trying to engage the rear 540 to 960.
Its like its caught between ranges and nicking the 960 side or the 540 side and no in between until PTO is stopped.


Another thing I just notices is with clutch in I can still move tractor for another few feet before the hydro is disengaged... hmm. I am using a bush hog so silimar to a chipper the rotating mass keeps turning. I have never expirienced this on ANY tractor and I have had several.

It sounds to me like a sticky clutch. If the clutch is not disengaging completely, that would explain the grinding when attempting to engage the pto. Is there a clutch pedal adjustment? (My manual isn't readily available at the moment)

 

[sandyc]

There is a clutch adjustment according to my manual. The only implement I run off the PTO is a snow blower and I have not heard any grinding either going into or out of gear

 

[tk tom]

Forgive me for a slight tangent, but what is the need for a PTO clutch on some models and not on others? I assume the tractor is an HST? There is no clutch on mine, just a PTO lever. Is this just a 20 series feature?

 

[s219]

Not sure I'd call it a feature, but the older HST B and L series Kubotas have a clutch and clutch pedal. It's only the more recent B models that are doing away with the clutch pedal. I don't know how the mechanicals are setup to allow that, or whether or not the clutch is still there but actuated differently. Perhaps they have put some sort of synchronizers that allow changing speed ranges and PTO engage/disengage without a clutch?

 

[grizzjeeper]

Is it dual stage clutch? Punching clutch immediately disengages implement but not hst. I can go ahead another foot or so which clutch in then it disengages. Interesting at that point implement rotating or not no grind!