pto slip clutch

[rcmike]

I just leave mine on the tractor and slip the pto shaft onto it. It is no harder than attaching it without the clutch.

[Soundguy]

For special applications, there are some slip clutches with quick release ends on the tractor pto side.

Soundguy

[greg_g]

Originally Posted by Soundguy

For special applications, there are some slip clutches with quick release ends on the tractor pto side.

I imagine there are exceptions to just about any rule folks can dream up. But for safety considerations, a forward mouted friction type slip clutch is probably employed only in the instances where there's insufficient rotational clearance on the implement end. In the final analysis, I'd consider that circumstance to be a design deficiency.

//greg//

[Soundguy]

A design deficience? I wouldn't go that far. Just because it was designed that way doesn't make it a bad design. Deere is know for some pretty darn good equipment.. The geometry of their drag mowers, shields and gear box setups at the fron, keeping in mind driveshaft angle and geometry.. there simply isn't much room left for a torque limiter right at the rear coupling point. That's why it is at the front of the pto shaft.

Since the tractor has a pto stub shield.. I don't see the issue.

Another thing.. with a large implement.. you are probbaly ( should be ) using a large tractor. Due to that geometry, the operator is not in a direct line of fire from flying peices in the event of a torque limiter failure. I.E... If I look back, I can't see the pto stub/driveline connection point on my larger tractors... thus no direct line for shrapnel. If it were mounted farther back there would be some chance.. but still low, agan.. due tot he geometry and size of the tractor. I have a feeling this would all be very different on a SCUT or even CUT.. where.. the torque limiter being ont he implement side gets it farther way from the operator. And due to geometry and size.. the operator is probably in a bad line of fire no mattter where the torque limiter is in the drive train... so they opted for the lesser of 2 evils.

Ergonomically. the torque limiter being on the tractor end does make for a few extra pounds to lift when attaching the pto shaft... that said though, those big metric #6 and larger drive shafts are already a bear to lift. A few extra pounds doesn't mean much.

Soundguy

[Bedlam]

Just got two responses from two different sales offices they are:

grflowers@agri-supply.com AL,SLIP CLUTCHES GO ON THE IMPLEMENT END OF SHAFT. THANKS,GENE

and sales@ssbtractor.com Al, It goes on the tractor shaft end so more than one implement may be used for the set up.

Looks like a tie at this point.

[heehaw]

i like the idea of it being on the tractor, that way you have one clutch for several applications: but i haven't ever seen them there??
heehaw

[Soundguy]

The only torque limiters i see at the tractor end are those that are pre-attached to specific drivelines.. etc. Like for my jd 1517 batwing.. etc. ( and similar setups.. )

Soundguy

[neverenough]

Originally Posted by rcmike

I just leave mine on the tractor and slip the pto shaft onto it. It is no harder than attaching it without the clutch.

Yes, if you leave it on the tractor all the time, then hooking up to it would be no different than with out it. As long as the clutch is calibrated for all the equipment it is required to protect, then you will be fine.

[rickmacheske]

I don't understand why you couldn't leave this one on the tractor all the time... http://www.agrisupplyco.com/cgi-bin/...951.000000&l=1

Looks like it would fit perfectly. What am I missing?

[greg_g]

Originally Posted by rickmacheske

What am I missing?

Primarily the safety factor; eight protruding springs and hex nuts, spinning at 540 rpm right behind the operator. But if safety is not an issue with you, the female end is not splined. http://www.agrisupplyco.com/Graphics/31951.jpg. Note that it says "Ideal for adding a slip clutch to rotarys cutters with shear pin protection". That means the female end (bottom) is round and has a bolt hole. It's compatible with the smooth transmission shafts found on some implement transmissions, and is held in place with a shear bolt. On the above model, you can just make out the shear bolt hole to the below and to the left of the center spring. That makes this particular device incompatible with the splined PTO shaft you'll find sticking out the rear end of many/most tractors.

Even if the female were splined, adjusting a slip clutch on the tractor end would be problematic. That is, assuming it's safely under a PTO shroud. In that configuration, it would be difficult to impossible to get a wrench on the backside hex heads. Adjusting the clutch off the tractor defeats your purpose for putting it there in the first place.

//greg//