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Implement Alley Discussion Forum

Shear Pin or Slip Clutch on Rotary Mower?

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Jerry/MT

08-13-2003 13:27:59




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I'm looking into buying a rotary cutter and I'm considering getting a model with a slip clutch rather than the standard shear pin/shear bolt type. I once had a Bush Hog 5 ft "Squealer" that I bought used that used shear pins and the pin hole was elongated and wouldn't hold the shear pin without the universal fix-it, duct tape. Any comments pro or con regarding slip clutch vs shear pin/shear bolt would be appreciated. Oh yeah, I will not use the cutter without a ORC!

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Jerry/MT

08-14-2003 17:34:56




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 Re: Shear Pin or Slip Clutch on Rotary Mower? in reply to Jerry/MT, 08-13-2003 13:27:59  
Looks like I'll be getting a slip clutch model cutter and of course an ORC to use with my TO-30. Thanks to all who responded to my note.



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Chris-se-ILL

08-14-2003 07:27:14




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 Re: Shear Pin or Slip Clutch on Rotary Mower? in reply to Jerry/MT, 08-13-2003 13:27:59  
Definitely a slip-clutch!!!! I just bought a bushhog style mower and it has a shear pin (2 grade, 1/2" X 3 1/2" bolt). I went to the field the first time to mow and sheared the bolt within the first 10 feet. I have sheared the bolt out of that thing about 7 times now, and if I get the thing into any embankment of dirt at all... I have to put a new bolt into it. I carry many spares on the tractor.

I will be putting a slip-clutch on this mower just as soon as I can!!!!! !!!!!

My old BushHog had a slip-clutch and we never had a problem!

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Ron

08-13-2003 20:18:49




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 Re: Shear Pin or Slip Clutch on Rotary Mower? in reply to Jerry/MT, 08-13-2003 13:27:59  
WHY would you want to run a ORC...???

With that, the mower is a MUCH bigger hazzard to everything around you.... How are ya going to STOP it, in an Emergency...?? NO ORC for me....I want to have CONTROL of the equipment....!!!



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Mike

08-14-2003 10:20:01




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 Re: Re: Shear Pin or Slip Clutch on Rotary Mower? in reply to Ron, 08-13-2003 20:18:49  
Ron,
The ORC needs to be added to tractors like the 8N. Without it, the winding down of the mower can actually push the tractor forward if it's in gear. I know a guy who stuck the front end if his inside the wall of his barn like that.



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Robert

08-14-2003 06:18:52




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 Re: Re: Shear Pin or Slip Clutch on Rotary Mower? in reply to Ron, 08-13-2003 20:18:49  
My '45 JD A doesn't have a live PTO, and I LIKE being able to disengage the mower, knowing that the ORC won't allow the mower to "drive the tractor" if I come up on a mysterious obstacle in the field.



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Unimog

08-13-2003 14:49:58




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 Re: Shear Pin or Slip Clutch on Rotary Mower? in reply to Jerry/MT, 08-13-2003 13:27:59  
Shear pin is simple but can be a pain. The slip
clutch is a much better setup PROVIDED it is
adjusted on a regular basis. If the mower is
stored outside or in damp areas the clutch discs
sometimes freeze together and the unit won't slip
when needed causing big trouble. If you're the type of person who will back off the tension and
slip the clutch and readjust at the start of the
season, I would definately get a mower with the
slip-clutch.

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Indydirtfarmer

08-14-2003 07:10:39




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 Re: Re: Shear Pin or Slip Clutch on Rotary Mower? in reply to Unimog, 08-13-2003 14:49:58  
Unimog is absolutly right. The slip clutch is the "preferred way". But, check and adjust them so they work when needed. I bought a Woods MD172 mower this spring. It has the slip clutch. When I got it home, and started going over it, I found that even with all the bolts loosened in the clutch pack, it wouldn't slip. After getting it loose, I made it slip for a few seconds. now, whenever I need to do any mowing, I get out the impact wrench, and loosen the bolts, make sure it slips, then adjust to "specs". Yesterday, I was mowing a power line right-of-way, on a nieghbors land. I hit a bicycle frame, buried in the weeds. The slip clutch likely saved my mower, and at the very least, saved a pto shaft. What a racket that made!!!!!

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