Question About engaging PTO

[n4khq]

I don't think a blade can contact the opposite pivot bolt.

Mine does, maybe there is a washer missing or something, I don't think the blades are upside down and the mower cuts great.

 

[n4khq]

They won't hit the pivot bolt.

NotForhire & whistlepig mine is hitting the Pivot blot. It sounds like someone is hitting the cutter with a 8 lb hammer every time I enguage the PTO. I have no ideal what would happen if I engaged at high RPMs.

Thanks

 

[n4khq]

Thank to everyone that replied. Below is the email I sent the dealer. let me know if I am missing something.

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I am hoping there is an assembly problem with my LandPride. The blades do not appear to be on upside-down but ever time I engage the PTO at the lowest possible RPMs, the blades slam into the pivot bolts. The seat kill switch only works when the PTO is engaged and must have a safety feature that locks the PTO because it jammed one blade on the pivot bolt andI had to beat it off with a large hammer.

If I disengage the PTO the blades spin down in cutting position. When I engage the electric PTO, I think the inertia of the blades cause them to slam into the pivot bolts sounding like I am hitting the cutter with a large hammer. I am think the blades should rotate 360 degrees.

Thanks

 

[Brad_Blazer]

The blades will backspin and hit each other when the PTO is engaged abruptly even if they are free to spin 360 deg. If the blades on yours are straight with little or no dogleg maybe they can hit the bolts.

Is it possible for you to adjust your idle lower? Maybe it is set at the high end of the spec.

My neighbor had a blade break at the eye and fly off. The direction of the break looked like it was due to the blades clacking together at startup, and both blades had a significant dent at the point where they met each other on the backspin. His tractor is a Ford 4000 and it has a separate PTO clutch that is pretty abrupt.

 

[TripleR]

Here is a previous thread: http://www.tractorbynet.com/forums/.../177989-disengage-pto-before-idling-down.html

 

[n4khq]

The blades will backspin and hit each other when the PTO is engaged abruptly even if they are free to spin 360 deg. If the blades on yours are straight with little or no dogleg maybe they can hit the bolts.

Is it possible for you to adjust your idle lower? Maybe it is set at the high end of the spec.

My neighbor had a blade break at the eye and fly off. The direction of the break looked like it was due to the blades clacking together at startup, and both blades had a significant dent at the point where they met each other on the backspin. His tractor is a Ford 4000 and it has a separate PTO clutch that is pretty abrupt.

Idle speed is 800 RPM now. I might get it lower but I think the electric PTO will slam it at any speed. The blades have a bend but not enough to clear the pivot bolts. I see what you are saying about the first blade hitting the second but it appears to me with both blades rotating 360 degrees it would not be a solid stop as the pivot bolts and if both were rotating they could avoid the hard slam. Should the blades be hitting the pivot bolts?

TripleR, I read engaging PTO prior to posting

Thanks

 

[Notforhire]

Thanks Bill, my cutter has brakes but at low RPMs they work great and do not tangle blades. Yes probable bad design on the land pride blades causing the lockup. The seat on the L3240 has a kill switch. If you stand up with the PTO engage, the tractor engine is killed. The blade lockup only occurred when I stopped the tractor by standup. I disabled the switch and I think the lockups will not be a problem. I think your reply is correct but still hopping to fine a better solution. Thanks again

my cutter has brakes

I think you are confusing brakes with a slip clutch located between the PTO shaft and the gear box of your cutter. The PTO brake is part of the tractor it stops the PTO shaft from turning when you disengage the PTO.
When you pull up the PTO switch, the PTO brake releases and the PTO drive clutch engages. When you push down on the button the clutch releases and the brake comes on. As far as I know there is no operator control over how fast this happens, just on or off. The only control you have is engine speed as mentioned earlier.

If you stand up with the PTO engaged, the tractor engine is killed.

Then it's working as designed. The safety interlock on the seat switch "knows" that the PTO is engaged. When you stand up it senses that, and shuts off the engine, as designed. Because the PTO is engaged, the cutter is attached directly to the tractors engine. When the engine shuts down it is being back driven by the inertia of the spinning cutter. In this case the engine is acting as a brake. The PTO remains engaged and the PTO brake is disengaged, because there is still power to the PTO switch and as long as things are turning there is still hydraulic pressure on the PTO clutch system.
What I am trying to say, in one thousand words or less is that this is all normal. :laughing:
Sorry for being long winded.
Bill

 

[TripleR]

View attachment 326220View attachment 326221

Idle speed is 800 RPM now. I might get it lower but I think the electric PTO will slam it at any speed. The blades have a bend but not enough to clear the pivot bolts. I see what you are saying about the first blade hitting the second but it appears to me with both blades rotating 360 degrees it would not be a solid stop as the pivot bolts and if both were rotating they could avoid the hard slam. Should the blades be hitting the pivot bolts?

TripleR, I read engaging PTO prior to posting

Thanks

I am at a loss as to your problem or reference to poor design on Land Pride. I have the same PTO switch and use a LP RCR2572 cutter, been using this cutter in heavy stuff for about four years without problems, same with another LP on a different tractor.

I have mine down now putting a new seat in, but will look at the cutter when I get finished later this week sometime, hard to use without a seat.:laughing:

 

[n4khq]

I think you are confusing brakes with a slip clutch located between the PTO shaft and the gear box of your cutter. The PTO brake is part of the tractor it stops the PTO shaft from turning when you disengage the PTO.
When you pull up the PTO switch, the PTO brake releases and the PTO drive clutch engages. When you push down on the button the clutch releases and the brake comes on. As far as I know there is no operator control over how fast this happens, just on or off. The only control you have is engine speed as mentioned earlier.

Then it's working as designed. The safety interlock on the seat switch "knows" that the PTO is engaged. When you stand up it senses that, and shuts off the engine, as designed. Because the PTO is engaged, the cutter is attached directly to the tractors engine. When the engine shuts down it is being back driven by the inertia of the spinning cutter. In this case the engine is acting as a brake. The PTO remains engaged and the PTO brake is disengaged, because there is still power to the PTO switch and as long as things are turning there is still hydraulic pressure on the PTO clutch system.
What I am trying to say, in one thousand words or less is that this is all normal. :laughing:
Sorry for being long winded.
Bill

I am not sure if I have a PTO brake, or a slip clutch or both. I think I have a brake for the following. When I used the seat kill switch, it appeared to lock the PTO immediately. The blades slammed so hard into the pivot bolts, I had to beat one off with a hammer. When I turn the PTO off, it takes about about 30 seconds for the blade to stop turning and the blades never leave the cutting position. I think I have a brake on the PTO to keep it from spinning for ever.

Thanks

 

[n4khq]

I am at a loss as to your problem or reference to poor design on Land Pride. I have the same PTO switch and use a LP RCR2572 cutter, been using this cutter in heavy stuff for about four years without problems, same with another LP on a different tractor.

I have mine down now putting a new seat in, but will look at the cutter when I get finished later this week sometime, hard to use without a seat.:laughing:

I don't think the blades on the LandPride should be slamming the pivot bolts making a noise as loud as a high power rifle. I think the problem is both the electric PTO and the blades not having enough bend to clear the Pivot bolts. Thanks for checking when you get your seat.