Do I need to add a slip clutch on a 4’ Howes bush mowers : Field Mowers Brush Cutters  -- Tractor Attachments Implements 3ph Discussion Forum and Review Do I need to add a slip clutch on a 4’ Howes bush mowers : Field Mowers Brush Cutters -- Tractor Attachments Implements 3ph Discussion Forum

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 02-21-2003, 14:01 Post: 49720
Joe D.
2003-02-21 14:01:36
Post: 49720
 Do I need to add a slip clutch on a 4’ Howes bush mowers

I assume never have seen a slip clutch for a bush mower that it attaches to gear box PTO shaft and can help protect the tractor drive line.
I’m pulling mower behind an YM1500 Yanmar and going to help a friend clear a piece of land.

Thanks ahead of time.
Joe






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 02-22-2003, 23:26 Post: 49801
BillMullens

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 Do I need to add a slip clutch on a 4’ Howes bush mowers

There is some type of slip clutch that is meant to protect the tractor, driveline and mower BUT usually the smaller and cheaper rotary cutters (the only kind I've seen) have a shear bolt for protection. Exceed the rated power, or incur a shock load, and the bolt shears. Replace it and keep going.
You may be thinking of an "overrunning clutch" that is used on tractors that don't have a live PTO. It is a clutch mechanism that only transmits power one way; so if the rotary cutter's speed exceeds the PTO speed, the clutch slips to keep the implement from pushing the tractor. It fits onto the PTO shaft on the tractor; the implement driveshaft attaches to the overrunning clutch.
Bill






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 02-23-2003, 19:39 Post: 49848
Joe D.
2003-02-23 00:00:00
Post: 49848
 Do I need to add a slip clutch on a 4’ Howes bush mowers

Just purchased the overrunning clutch, but I had heard you could get a slip clutch for the other side of the shaft.
I do not know if it would replace my shear bolt or go on before or after it.
To tell the truth I’ve only seen picture of them on the Internet and when I asked the local tractor dealer I purchased my slip clutch from, he stated I mite be money ahead if I added a slip clutch to my bush mower.

He sold me my overrunning clutch for $44 and said he could get the slip clutch for about $100.
From what I can tell from the Internet the price overrunning cutch was more than fair.

Thanks again,
Joe






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 05-02-2003, 20:11 Post: 54187
loghouse95



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 Do I need to add a slip clutch on a 4’ Howes bush mowers

make sure you use the right grade shear bolt and I would not think there would be any need for a slip clutch






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 05-02-2003, 20:48 Post: 54191
plots1

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 Do I need to add a slip clutch on a 4’ Howes bush mowers

As loghouse stated , make sure your shear pin is the correct grade.!!! I have had my cutter stall earlier this year and got heavy clutch stink.after taking a good look at shear pin found it was a grade 5 instead of a grade 2.gear box on cutter was protected but hard on tractor clutch. it was the pin that came with my kk cutter, oops someone made a mistake. MAKE SURE TO CHECK BEFORE USING! having the wrong pin installed could result in big damage, lucky for me mine faired ok that time. slip clutch might be a good safety device.






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 05-14-2003, 20:27 Post: 54893
MarkStewart



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 Do I need to add a slip clutch on a 4’ Howes bush mowers

I just bought a howse 42" cutter. It also came with a grade 5 bolt as shear pin. I think I might have damaged my pto gears on my ym1401. It still works but I have to play with clutch for it to slip into gear. It doesnt make any weird noises so I hope it isn't terminal. I wish I would have known that it wasn't the right bolt when I bought it. You would think that with a 42" cutter they would have put a lower grade pin in it.






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 05-14-2003, 20:42 Post: 54894
Billy

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 Do I need to add a slip clutch on a 4’ Howes bush mowers

You need to use a grade 5 shear bolt, not a grade 5 bolt. If you're going to use a plain bolt as a shear bolt use a grade 2.

The two implements I have that use a shear bolts both use a grade 8.8 metric (grade 5 SAE) shear bolt.






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 05-14-2003, 22:05 Post: 54900
Peters

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 Do I need to add a slip clutch on a 4’ Howes bush mowers

Billy how do the marks differ for a grade 5 shear bolt and a regular SAE grade 5?






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 05-15-2003, 06:41 Post: 54903
BillBass



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 Do I need to add a slip clutch on a 4’ Howes bush mowers

Joe-Tractors are protected from the implements by either a shear bolt or a slip clutch. Seems implements that are larger and/or require more power and/or a little more expensive tend toward the clutches. Here is a link to a basic description.






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 05-15-2003, 07:03 Post: 54906
Billy

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 Do I need to add a slip clutch on a 4’ Howes bush mowers

Eric, the shear bolts that came with the implement has a ring cut around it. Other than that, the markings are the same.

I could be totally wrong about this whole shear bolt thing?

Billy






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Discussion Boards > Active Subjects > Messages as Posted > Field Mowers Brush Cutters Forum

Thread 49720 Filter by Poster:
BillBass 1 | BillMullens 1 | Billy 4 | Joe D. 2 | loghouse95 1 | MarkStewart 1 | Murf 3 | Peters 2 | plots1 1 | TomG 2 |

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