Tiller How do I buy a PTO for my tiller?

[Doc_Bob]

Here's the pto shaft/slip clutch/shaft extension I use for my 48"-wide Yanmar RS-1200 rototill and my Kubota B7510HST.


Bought the Weasler slip clutch from agpartz.com for $65. That website is no longer functioning. You can get slip clutches at TSC and at Agri-Supply.com.

Now my question is how to adjust this slip clutch (any slip clutch) so that it does it's job of offering protection for the implement and PTO tractor tranny. How do you do it on yours?
Bob

 

[flusher]

Now my question is how to adjust this slip clutch (any slip clutch) so that it does it's job of offering protection for the implement and PTO tractor tranny. How do you do it on yours?
Bob

It's pretty straightforward.

Measure the gap between the two plates at each bolt. Use a $15 vernier caliper and measure to a few thousandths of an inch. The gap measurements should be the same to that tolerance. If not, adjust the bolts to even out the gap.

Loosen the bolts until the springs are free to turn. All the bolts should be loosened the same number of turns.

Run the pto for a few seconds. The shaft should turn, but the tiller should not operate.

Now tighten the bolts the same number of turns to engage the slip clutch plates. The tiller should operate when the pto shaft rotates.

You may have to readjust the clutch bolts if it slips too easily when the tiller is in the ground.

Slip clutches provided with tillers and rotary mowers usually have a manufacturer-specified plate separation gap that supposedly protects the tractor and implement.

The Weasler clutch that I have on my tiller was factory adjusted to 8,000 inch-pounds.

 

[Doc_Bob]

It's pretty straightforward.

Slip clutches provided with tillers and rotary mowers usually have a manufacturer-specified plate separation gap that supposedly protects the tractor and implement.

This is the answer I am looking for from CCM. No answer yet.
Bob
PS Thanks for the help!

 

[HayDR]

PTO clutches do not protect against all damage. A PTO clutch is designed to only lessen the possibility against catastrophic damage and consequential damage to the implement and or the tractor. If an implement like a tiller is being used and it goes from full speed to a complete stop in milliseconds, then the likely hood something will absorb most of the inertia and that part or parts will fail. Hence you would want a tine to break rather than an internal part in a gearbox.

Most of the PTO clutches being used on tillers have a torque setting of 650-1000 nm +/- 15%. This setting is when the clutch is new and unused. Use history, altitude, atmospheric pressure, ambient temperature, relative humidity all have a an effect on a clutch. It is impossible for someone to say, set a 2 plate clutch's springs at a certain distance of compression and the clutch will be set to slip at X-HP. Different manufacturers use different tensions on their springs and different materials in their friction disc's. Tightening a nut on a spring may not increase the clutch setting. If the condition of the clutch friction disc's is worn or glazed then they should be replaced. If the clutch was slipped and the paint on the clutch is discolored the springs, friction disc's and or the metal plate may need to be replaced.

The primary reason you slip the clutch before use is to make sure that there is not any surface tension on the friction disc's caused by rust. If you want to reduce the spring tension on the compression springs then do so. If you reduce it too much you could reduce the life of the clutch parts because the clutch is slipping too much. Common sense is the best safety protection and operator can have. If you use you tiller in a rock garden the the life of it components may be reduced. Inspect the area before you till. Ask questions like what has been in this area in the past. If you don't know the area don't till at maximum tilling depth. Trust the factory settings and try to stay close to their recommendations.

 

[Ranch_Hand_Supp]

PTO clutches do not protect against all damage. A PTO clutch is designed to only lessen the possibility against catastrophic damage and consequential damage to the implement and or the tractor. If an implement like a tiller is being used and it goes from full speed to a complete stop in milliseconds, then the likely hood something will absorb most of the inertia and that part or parts will fail. Hence you would want a tine to break rather than an internal part in a gearbox.

Most of the PTO clutches being used on tillers have a torque setting of 650-1000 nm +/- 15%. This setting is when the clutch is new and unused. Use history, altitude, atmospheric pressure, ambient temperature, relative humidity all have a an effect on a clutch. It is impossible for someone to say, set a 2 plate clutch's springs at a certain distance of compression and the clutch will be set to slip at X-HP. Different manufacturers use different tensions on their springs and different materials in their friction disc's. Tightening a nut on a spring may not increase the clutch setting. If the condition of the clutch friction disc's is worn or glazed then they should be replaced. If the clutch was slipped and the paint on the clutch is discolored the springs, friction disc's and or the metal plate may need to be replaced.

The primary reason you slip the clutch before use is to make sure that there is not any surface tension on the friction disc's caused by rust. If you want to reduce the spring tension on the compression springs then do so. If you reduce it too much you could reduce the life of the clutch parts because the clutch is slipping too much. Common sense is the best safety protection and operator can have. If you use you tiller in a rock garden the the life of it components may be reduced. Inspect the area before you till. Ask questions like what has been in this area in the past. If you don't know the area don't till at maximum tilling depth. Trust the factory settings and try to stay close to their recommendations.

I agree, true , true.

Ronald
Ranch Hand Suppy

 

[Doc_Bob]

Trust the factory settings and try to stay close to their recommendations.

I am unclear as to what the factory settings are on this slip clutch. I cannot find them listed anywhere. I cannot check to see if the slip clutch is close to what the factory says they should be since I have no idea what they were intially.
Bob

 

[HayDR]

I am unclear as to what the factory settings are on this slip clutch. I cannot find them listed anywhere. I cannot check to see if the slip clutch is close to what the factory says they should be since I have no idea what they were intially.
Bob

The factory setting is the setting of the clutch as you received new. Implement manufacturers often use multiple PTO manufacturers so publishing a specification would requite you know exactly the PTO manufacturer you have and lot that specification refereed too. PTO MFG's change designs all the time.