PTO Thingamajig. Any body know what it is?

[brown40]

It's definitely a friction clutch and should be protecting both machines from one another. If set right it would overrun on a hard stop and slip on an obstacle/hard start. 1000# takes a lot to stop or start moving... that clutch (once you clean and adjust it) will slip at a torque range/load you decide. Supposedly JD protects theirs internally, but is a much more expensive and less accessible system--in the event it does not function as designed--the tractor gets taken apart.
There should be a number of discs and springs clamped by the bolts on the perimeter. Check for corrosion (clean) and glazing on brake/clutch material (removing to dull finish/replace if too far gone).
I would not run a machine with a dual-purpose clutch built in the driveline that has failed--enough forces are there to add $$$ to production costs and list price to add the insurance/protection. I suspect you can set it to cushion start and stop for a variety of inputs. Do you know if the owner ever adjusted it? How big a tractor it was behind before?
It will be a very simple device once you get it apart--be sure the order and direction of plates and clutch discs is maintained in the event there's a ?bell spring? in the mix. There also be coil springs around those bolts--those are more forgiving but maybe harder to initially set.
I'd note how many turns the bolts began a before I disassembled--could also find a "gauge" to reference the housings.

 

[aczlan]

The problem is not that the clutch is slipping, but that's it's failing to slip on startup as it is designed to do.

First off, the OP needs to find a manual from the manufacturer of the slip clutch. Someone posted a link to what maybe the same one. In that manual there should be directions on how tight the bolts should be.
Once you know how tight the bolts should be, I would loosen them all up (but not take them out), then start the PTO and let the clutch spin for a second then shut the PTO off.

At that point you can retighten the bolts as directed in the manual and you know that it should slip.
What often happens is that the plates on slip clutches like this get rusted up and they won't slip until you loosen up the bolts and spin then.

Aaron Z

 

[TerryR]

The service instructions are on the manufacturer's website: Service Instructions

 

[spokane 1]

The problem is not that the clutch is slipping, but that's it's failing to slip on startup as it is designed to do.

did anyone tell the operator the PTO needs to be disengaged at startup? This guy is starting his engine with the pto on?
My morebark JD 110hp diesel if fired-up in neutral after it warms up I slowly engage the pto (in Out box) this slowly begins turning its 1200lb destruction wheel. this sequence take a full minute.
I warm the hydraulics before loading timber.
as for power Mine can eat a 40 foot telephone pole 12 inches round in 40 seconds it has awesome power .

 

[Industrial Toys]

Thanks for the replies. It is not possible to start the JD 6200 with the PTO engaged. It is electrically operated.

I think this thing will eat a telephone pole as well, except I think I may have to stop it mid way so it can catch it's breath. The 6200 puts out 66PTO HP (showed a little higher on the Dyno) but this is a little at the low end for this chipper, which says up to 100 HP. I bought this chipper knowing that I could not fully realize it's capacity, but liked the very large in-feed. So far, I have been nothing but impressed, and that doesn't happen very often.

I am a little annoyed. Bandit has not called me back. Fine, if companies don't want to have the resources to respond to customers in real time and say to leave a msg. WELL, AT LEAST CALL BACK! Welcome to 2017. Pathetic!

I may take off the belt shield again and get a better look at that clutch for a name or model number.

 

[TerryR]

Have you followed the links posted above? The photo of Weasler type M looks exactly like the photo you posted:


If it's not the same thing it's an exact copy.

 

[jenkinsph]

Have you followed the links posted above? The photo of Weasler type M looks exactly like the photo you posted:
View attachment 510365

If it's not the same thing it's an exact copy.

That link should answer all of the OP's questions, a call to them should help with any changes needed to work with your tractor.

 

[aczlan]

That link should answer all of the OP's questions, a call to them should help with any changes needed to work with your tractor.

Specifically:

RUN-IN
(Necessary for all new clutches and any clutch that have not been used for approximately 60 days.)
1. Make sure tractor is off and PTO is disengaged.
2. Disconnect drive shaft from tractor.
3. Loosen bolts on outside diameter of clutch until all bolts are just loose, then tighten all bolts one half turn.
4. Attach implement to tractor and drive shaft to tractor PTO. Stand clear of machine.
5. Start tractor. Engage PTO and run for a few seconds or until clutch visibly smokes, then disengage PTO.
6. Make sure tractor is off and PTO is disengaged.
7. Disconnect drive shaft from tractor.
8. Tighten all bolts on outside diameter of clutch until compression plate is tight against housing

View attachment Service-Instructions-M-Type-Friction-Clutch.pdf

That PDF also has directions on checking the overrunning clutch on page 2.

Aaron Z

 

[sixdogs]

For some PTO applications like this, if a new part is not prohibitively expensive I just buy a new one. For example, a slit seeder I have used a particular type of radial pin clutch specific to that product. I didn't even know what that was but did know the old one didn't work right and looked shaky. I bought a new one and now have protection for an expensive piece of equipment for not a whole lot of money.

 

[Industrial Toys]

Thanks for all the help. It is a weasler clutch, just not sure what it does yet. Bandit is once again promising to call me "right" back. That was half and hour ago. It seems that the last PTO chipper they sold was in 08 although they are still offered. These things seem to be very scarce and I have to wonder why?

It's another project (and expense) that I don't need, but maybe a twin disk clutch should just be added to save the JD PTO clutch and brake.