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Discussion Forum

What's the spring for on belly and front mounted blades?

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AGEN

09-19-2002 13:13:07




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I noticed that almost all the front mounted snow push blades you see on tractors have a "relief" coil spring mounted on them in some fashion. (See example picture) Most belly blades have this same coil spring as well. However, modern 3pt hitch blades have nothing like that at all. I don't have a push blade like this, so I am wondering what the spring is for. What does it really do? How come modern blades don't have this feature? Thanks for ending my curiousity.....

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Harold Hubbard

09-20-2002 04:36:47




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 Re: What's the spring for on belly and front mounted blades? in reply to AGEN, 09-19-2002 13:13:07  
If it has springs, it was probably designed as a snowplow. Blades designed as dozer blades are much stronger and usually rigidly mounted, no matter where they mount. For snowplowing, some sort of safety device is required, as you can get up considerable speed in light snow, and then, as the other guys said, hit something that won't move. Ask anyone who has broken or bent a three point blade how they did it. The chances are pretty good that they were plowing snow and hit something else. Or they put a five foot light duty blade on a 100 horsepower four wheel drive tractor, in which case the blade had no chance anyway.

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F14...It's safety related.

09-19-2002 15:10:19




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 Re: What's the spring for on belly and front mounted blades? in reply to AGEN, 09-19-2002 13:13:07  
Belly and front blades are essentially mounted rigidly, and have springs on them so if the cutting edge catches on something immovable, either the edge or the whole blade will flop forward and allow the blade to ride up over the obstacle. You can adjust the preload on the spring to determine how hard the blade hits before it 'trips' and rides up over.

A rear blade on a non power-down 3 point hitch will just lift the hitch to ride up over the obstacle.

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Alvin NE WI

09-19-2002 17:45:44




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 Re: Re: What's the spring for on belly and front mounted blades? in reply to F14...It's safety related., 09-19-2002 15:10:19  
F14-- you are so right, just don't drive faster than the spring can trip!! About 45 years ago I and the bosses BIL had to plow snow for the township with a IHC truch and a angle blade, also had to plow the snow off the run ways at a local airport. That was the fun place , could get a good apeed cause they were half mile long and no mail boxes etc. Well we forgot about the shallow ditch at end of runway, hit it going **ll bent for lection, blade went down a bit, was going to fast and blade didn't get back up in time, dug into dirt, broke off brackets and runned over the blade with all wheels, head still hurts. Boss just laughed, his BIL never did any thing foolish like drive fast!!.

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F14...ROFL!

09-19-2002 18:07:34




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 Re: Re: Re: What's the spring for on belly and front mounted blades? in reply to Alvin NE WI, 09-19-2002 17:45:44  
My ex-BIL did something like that. Had a little Fisher blade on the front of an old Scout 2 seater. One of his contract driveways was a half-circle drive right off the main highway. Ol' Jupe got a little likkered up one day and decided he'd just kinda ease off the gas a little, (top end on them old Scouts wasn't much anyway) drop the plow, turn off the highway, run around the drive, whip back onto the highway and keep right on a-truckin'. Mighta worked too, if that feller hadn't a put a bunch of railroad ties along the edge of his driveway that fall...

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AGEN...ooooohh

09-19-2002 17:16:41




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 Re: Re: What's the spring for on belly and front mounted blades? in reply to F14...It's safety related., 09-19-2002 15:10:19  
That makes sense. Thanks F14.



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