Question About engaging PTO

[Bluegill2]

Im glad for your good fortune.
,,,. My experience is that fasteners are sized to stabilize the joint against any movement, and the joint material is of like strength to endure the bolt force. After seeing multiple bolts loosen multiply on my dad and me copying him I began to tighten fasteners to their full spec when the joined parts were sufficiently robust to take it. Thats the only way Iv found to produce a long term secure joint under load reversal and shock conditions.

First I've ever heard of those high torque rates for those bolts (bush hog blades). Glad it works for ya. No disrespect intended.

 

[David_Kb7uns]

I am sure I can bypass the switch on electronic PTO to make this happen. I will be in contact with the dealer next week to be sure the blades are correct. I am wounding why the blades are bent down and back up but are not clearing the pivot bolts. I wish I knew if the blades should be clearing the pivot bolts but that is not something people check unless they are having a problem. If I can't get the blades modified, I will consider you suggestion.

Thanks

Most of these clutches may have a electric switch or cable to engage the PTO but the clutch itself is a hydraulic multi disc clutch pak and either the discs are engaged with the driven discs or the braking discs and there is little between the two and they are hard to feather. So bypassing and engaging switch while cranking will not work very well as there is no hydraulic pressure developed yet.

David Kb7uns

 

[SPYDERLK]

Most of these clutches may have a electric switch or cable to engage the PTO but the clutch itself is a hydraulic multi disc clutch pak and either the discs are engaged with the driven discs or the braking discs and there is little between the two and they are hard to feather. So bypassing and engaging switch while cranking will not work very well as there is no hydraulic pressure developed yet.

David Kb7uns

Hopefully it would engage as soon as the pressure starts to rise and would be less abrupt and at a lower rpm. :confused3:

 

[TripleR]

I well remember when the -3 came out with the electric over hydraulic PTO was introduced, I posted I didn't want one, no way, no how. I have had one for a year and found it to be a non issue. I checked and the John Deere 4000 Series uses the same PTO engagement.

 

[Bluegill2]

I well remember when the -3 came out with the electric over hydraulic PTO was introduced, I posted I didn't want one, no way, no how. I have had one for a year and found it to be a non issue. I checked and the John Deere 4000 Series uses the same PTO engagement.

I'm sure it's fine, but I'd much rather clutch the PTO with a big cutter hooked up!

 

[TripleR]

I'm sure it's fine, but I'd much rather clutch the PTO with a big cutter hooked up!

The clutch is pretty much a non issue with me as all of our larger tractors have independent PTO's in which depressing a clutch has no effect, they do however have the lever which I prefer as you can engage slower than the electric over hydraulic. I really liked the system on one of our Case tractors in which there was a halfway position where you moved the lever and a clutch began to rotate the PTO before going on to full engagement, really smoothed the engagement.

We use a fairly heavy Woods DS1260 10'6" pull type cutter with our M8540 and I can get smooth spool up with the lever. I don't know if any of the bigger tractors have the electric over hydraulic, I need to check. Our renters use a JD7000 Series with a Woods 15' bat wing.

 

[Beltman60]

I have an electric clutch on my JD 3032e

The best way I have found out to engage my pto is at about 1000 rpm's turn it on for a split second and once it moves ever so slightly then shut it off for a split second then back on

what this does is gets movement into the blades but not to the point of having them come around and hit the bolts
once there is movement I turn it back on and have no problems at all and take it up to my 540 rpm for the slasher

when I go to stop it I gradually take my throttle down until I get back down to 1000 rpm's and push the button down

only had problems once when I first got my little JD
now 300 hrs. later I got it down

 

[David_Kb7uns]

Not sure about the Grand L 40 series but looking on my service manual for the L3130GST it does show an accumulator in the circuit for the PTO, the oil supply comes from the regulating valve for the GST transmission with oil suppliede from power streering section of the hydraulic pump. The HST version gets oil supply from the charge pump.

Now if you could put a restrictor on the feed to the accumulator you would slow the engagement some and maybe playing with the spring you could also change how hard it brakes the shaft when stopping, you do want good pressure on the clutchpak to prevent slipping though.

David Kb7uns

 

[wmonroe]

The clutch is pretty much a non issue with me as all of our larger tractors have independent PTO's in which depressing a clutch has no effect, they do however have the lever which I prefer as you can engage slower than the electric over hydraulic. I really liked the system on one of our Case tractors in which there was a halfway position where you moved the lever and a clutch began to rotate the PTO before going on to full engagement, really smoothed the engagement.

We use a fairly heavy Woods DS1260 10'6" pull type cutter with our M8540 and I can get smooth spool up with the lever. I don't know if any of the bigger tractors have the electric over hydraulic, I need to check. Our renters use a JD7000 Series with a Woods 15' bat wing.

My brother in law works for a farmer in central IL (about 6000 acres) and they have all John Deere equipment. The tractors I have been in are a 7220, 8200, 8330, 8295R, 9430 and the combine is a 9760STS. I have been in all the above machines while they were operated and have spent time operating 3 of them myself, all of them have the same electric pto engagement that my 5240 does. My 5240 sounds like it engages the brush hog kind of rough until you hear a 200+ hp tractor engage the auger on a 1000+ bushel auger wagon, it sounds really rough! Lol. However they put thousands of hours on this equipment with zero pto issues.

 

[TripleR]

My brother in law works for a farmer in central IL (about 6000 acres) and they have all John Deere equipment. The tractors I have been in are a 7220, 8200, 8330, 8295R, 9430 and the combine is a 9760STS. I have been in all the above machines while they were operated and have spent time operating 3 of them myself, all of them have the same electric pto engagement that my 5240 does. My 5240 sounds like it engages the brush hog kind of rough until you hear a 200+ hp tractor engage the auger on a 1000+ bushel auger wagon, it sounds really rough! Lol. However they put thousands of hours on this equipment with zero pto issues.

Thanks for the information, that will save me a trip up into one. I have never driven one, but had to go up into one about a year ago to leave some instructions and man there sure was a lot of stuff in there and it made our "biggest" tractor fee like a toy.

Those guys do stuff with those big machines that it is hard to believe unless you see it, sure lets you know the difference between someone like me and someone who does it for a living.

 

[EE_Bota]

With some of the electrically actuated PTOs, depressing the clutch doesn't help, unfortunately. There doesn't appear to be anyway to feather the engagement.

What about on-off-on-off-on type of feathering?

 

[RoyJackson]

What about on-off-on-off-on type of feathering?

I don't know, actually..I'm a "lever" guy.
Best advice I can suggest is to engage at as low an RPM as possible...

 

[RoyJackson]

What about on-off-on-off-on type of feathering?

I don't know, actually..I'm a "lever" guy.
Best advice I can suggest is to engage at as low an RPM as possible...

 

[EE_Bota]

I don't know, actually..I'm a "lever" guy.
Best advice I can suggest is to engage at as low an RPM as possible...

My tractor has a lever too, but the electric just electrically shifts a valve I am manually shifting. Like you, I don't know if it will work with electric, but I believe it should work.

 

[n4khq]

Just my novice opinion but I think Kubota need to add the soft engage PTO option to their tractors with electronic PTOs. My bailer on the M4070 electronic PTO engages fine which tells me the LandPride rotor cutter could be improved. I use the New Holland on the 11 FT bush hog. The New Holland does not have an electronic PTO so I can't compare. The blades are tight on the land pride and stop in the cutting position (completed extended). If I manually push the blades forward, before engaging, I get an acceptable start, just a little shuffle and no big bang. I am think all that is required is to get the blades loosen up which would allow the blades to swing forward on disengagement.

I don't think the big bang I have been complaining about is going to break the land pride but I would like to eliminate it if possible.

This was my first post on the forum, I am very impressed with the knowledge and sharing. Thanks.

 

[n4khq]

What about on-off-on-off-on type of feathering?

I have tried the on off feathering from day one. The big bang scares me so much, I cut it off the first try.

 

[TripleR]

Just my novice opinion but I think Kubota need to add the soft engage PTO option to their tractors with electronic PTOs. My bailer on the M4070 electronic PTO engages fine which tells me the LandPride rotor cutter could be improved. I use the New Holland on the 11 FT bush hog. The New Holland does not have an electronic PTO so I can't compare. The blades are tight on the land pride and stop in the cutting position (completed extended). If I manually push the blades forward, before engaging, I get an acceptable start, just a little shuffle and no big bang. I am think all that is required is to get the blades loosen up which would allow the blades to swing forward on disengagement.

I don't think the big bang I have been complaining about is going to break the land pride but I would like to eliminate it if possible.

This was my first post on the forum, I am very impressed with the knowledge and sharing. Thanks.

Have you discussed this with your dealer? I expect some shuttering and a little noise on all our tractors, but I never get the big bang you are describing and would be concerned. Is there anyway you can upload a video of this, some TBN members have done so which gives us all a better understanding of he issue.

 

[RoyJackson]

...but I never get the big bang you are describing and would be concerned.

"Big bang" is pretty subjective. My old Land Pride cutter made a pretty loud "bang" when the blades extended...even at idle (1000) RPM. Once the blades extended, and that vibration from the imbalance subsided, it wasn't too bad. The Woods Brush Bull I have now seems to make a lot less racket during the initial engagement.

 

[Bluegill2]

Just my novice opinion but I think Kubota need to add the soft engage PTO option to their tractors with electronic PTOs. My bailer on the M4070 electronic PTO engages fine which tells me the LandPride rotor cutter could be improved. I use the New Holland on the 11 FT bush hog. The New Holland does not have an electronic PTO so I can't compare. The blades are tight on the land pride and stop in the cutting position (completed extended). If I manually push the blades forward, before engaging, I get an acceptable start, just a little shuffle and no big bang. I am think all that is required is to get the blades loosen up which would allow the blades to swing forward on disengagement.

I don't think the big bang I have been complaining about is going to break the land pride but I would like to eliminate it if possible.

This was my first post on the forum, I am very impressed with the knowledge and sharing. Thanks.

You need to get out there and mow a few acres to get those blades loosened up. They aren't supposed to be tight, but usually are when new. Talk to your dealer also...

 

[TripleR]

"Big bang" is pretty subjective. My old Land Pride cutter made a pretty loud "bang" when the blades extended...even at idle (1000) RPM. Once the blades extended, and that vibration from the imbalance subsided, it wasn't too bad. The Woods Brush Bull I have now seems to make a lot less racket during the initial engagement.

Yes it is subjective, but when I hear the noise is like hitting the cutter with an 8 pound hammer that "seems" a lot louder than anything I have ever used.