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Tractor Talk Discussion Forum

how they angle Wing plow on large plow trucks

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diggerdave

03-04-2005 07:15:30




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Sort of a silly question but ive never seen how a wing plow is hooked up to those large state plow trucks up close..so how do the drivers angle the plow so that they clear the snow on a road where the bank slopes DOWN from the roads edge ( Iknow its hydraulically operated) without trashing the edge of the asphalt road?? Is this just a case of "side view mirror and good old experience" or is there ome sort of "float" at work. Just curious as the seem to do a good Job!

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Mark - IN.

03-04-2005 22:08:34




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 Re: how they angle Wing plow on large plow trucks in reply to diggerdave, 03-04-2005 07:15:30  
Funny you should ask Dave, just gave one a good looking over the other day. Was a 5 ton state truck and was leaning on the blade. Blade had one push-pull cylinder on each side of the blade, and one large cylinder to lift and lower it. The thing that amazed me was the 3/8" cable between the cylinder and the blade that lifted and lowered it. That was a huge blade, and I'm sure that cable gets stressed out like no one's business. The cable locks are the same exact ones that we use for the cables that we use to anchor utility poles. We use 2 on each end of the cable, the truck used 3. Obviously 3/8" cable is much stronger than I ever gave it credit for. Then again, maybe used to be 1/2" cable when it started out. Hmm? Naw, locks were tight at 3/8".

Mark

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RJ-AZ

03-04-2005 19:46:38




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 Re: how they angle Wing plow on large plow trucks in reply to diggerdave, 03-04-2005 07:15:30  
The ploe operators do make boo boos now and then but a good operator has a feel for the way the toe and heel of the wing plow are pulling. Our Monster truck has a drop limit setting for the toe on the wing.



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K C in Ia

03-04-2005 14:49:54




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 Re: how they angle Wing plow on large plow trucks in reply to diggerdave, 03-04-2005 07:15:30  
Mostly it's the operator, but having the shoulder frozen hard does make it look easier. Idealy you try to just skim the ground and leave 1" or so of snow on the shoulder or back-slope area. In a couple days the sun will help shrink this away. Also as mentioned some are equipped with support wheels, skids/shoes, cable or cylinder stroke stops to help prevent skalping the shoulder material. Some front posts are down pressure others are floating, depends on the brand.

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srs_mn

03-04-2005 08:09:03




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 Re: how they angle Wing plow on large plow trucks in reply to diggerdave, 03-04-2005 07:15:30  
The "angle" is set with a push arm mounted to the plow at the outside end of the blade, and to the truck frame at the other end - it"s usually just a sliding pipe inside a pipe that"s locked in place with pin in a hole... it usually has a spring shock absorber arrangement on it, too, although this is a joke if you hit something solid!
The blade is raised with a cable that is in turn hooked to a hydraulic cylinder and set of pulleys - it is strictly up only, with no down pressure, and "floats" along the surface... if the surface is frozen it looks like you really know what you"re doing, but if it is not frozen it can get pretty rough looking real quick.
srs/mn

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Rick Kr

03-04-2005 07:47:14




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 Re: how they angle Wing plow on large plow trucks in reply to diggerdave, 03-04-2005 07:15:30  
Dave,
The county trucks here in Mid Michigan actually have a caster wheel that the blade rides on. BUT, my neighbor never filled the edge of his driveway, new asphalt. When the truck came by that winter, the driveway was about 4 inches above the shoulder of the road, took out about a three foot long chunk and a foot wide of his new driveway.

Rick



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