Posted this in the "new to industry"section and only got a sarcastic answer, perhaps people here are more professional...replaced my old truck/meyers combo with an '89 GMC 1 ton and fisher 9' blade. Obviously everything is used equipment. Question is: when do you replace the cutting edge on a fisher. On the old meyers it wasn't as critical to me due to the difference in blade trip vs. just a tripping edge. Currently there is 5 1/2" of cutting edge on the fisher, but the bottom of the cutting edge is flush with the trip assy. Even appears trip assy may have some actual wear to it. Called a local fisher dealer and he told me to wear it down to 4". Seems like that will cause serious damage to trip assy. Was also told new trip edge is only 6" to start. How far below trip assy should a new cutting edge extend?
cutting edge
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Your dealer was right the actual part that trips is called the base angle and it needs to be worn down before a cutting edge is installed. Take off the cutting edge and let the base angle wear down for the rest of the season. Next year install the cutting edge or get a new one. Just make sure that you don't wear down the base angle too far. 
Jason
Jason
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I'm not 100% positive, but I believe its the MC series cutting edges that are reversible. I know my 9' MC is.
Leave the cutting edge on your blade and wear both it and the base angle to a point that the spring tabs are almost hitting the pavement. Be sure not to let the tabs hit and wear themselves to the bolts or you'll be in a world of doo-doo. After initially wearing the base angle just replace the cutting edge as needed. Good luck
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Also, If you don't have the proper attack angle on the blade...it will put the trip bars closer to the ground and they will touch pavement and wear out quicker. That a-frame MUST be parallel to the ground or slightly higher at the mounting ears than the pivot pin... I started with a brand new base angle and cutting edge both 6" wide and am wearing both at the same time. It took a little while to break the edge in for optimum scraping but it's perfect now. Thats the only thing I don't like about the Fisher is wearing down that base angle...
Drive me nutz to think I spent 500 bennies to grind it away on the pavement...YES, It is VERY expensive to replace so it needs to be well taken care of and not worn down too far !!
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On a new plow the trip edge is about 6" high and a new cutting edge is about 6" high.
Installing or leaving a new cutting edge on a new trip edge will simply result in both wearing at the same time. You just wasted a cutting edge for no reason.
Wear your trip edge down 1.500 to 2.000 inches. I am not sure if this is an exact science so you should check to make sure YOUR trip edge isn't worn to the trip edge spring brackets. You don't want to touch those at all!! If the bottom of your trip edge is flush with the bottom of the spring brackets then stop and pick up a cutting edge!
Install a new cutting edge. The cutting edge basically replaces the 1.500 to 2.000 inches of steel that was worn away during your initial use. It prevents further wear to the trip edge and levels the plow.
Before installing your new cutting edge, be sure to grind the trip edge smooth. Why... If you leave large burrs between the cutting edge and trip edge then you increase the chance of damage. The burrs that you leave will eventually mash down and wear away, this results in loose bolts and then they will either break or cause the cutting edge to split. I would also recommend using Nyloc Nuts
As for the used plow, depending on how much of the trip edge was worn away...
If it is a safe amount then I would remove the used cutting edge and save it. Wear the trip edge down as stated above. When you get to the point of needing a cutting edge, install the used one and use it as long as you can, then buy a new one.
If the trip edge is worn too far then remove the old cutting edge and replace it.
Installing or leaving a new cutting edge on a new trip edge will simply result in both wearing at the same time. You just wasted a cutting edge for no reason.
Wear your trip edge down 1.500 to 2.000 inches. I am not sure if this is an exact science so you should check to make sure YOUR trip edge isn't worn to the trip edge spring brackets. You don't want to touch those at all!! If the bottom of your trip edge is flush with the bottom of the spring brackets then stop and pick up a cutting edge!
Install a new cutting edge. The cutting edge basically replaces the 1.500 to 2.000 inches of steel that was worn away during your initial use. It prevents further wear to the trip edge and levels the plow.
Before installing your new cutting edge, be sure to grind the trip edge smooth. Why... If you leave large burrs between the cutting edge and trip edge then you increase the chance of damage. The burrs that you leave will eventually mash down and wear away, this results in loose bolts and then they will either break or cause the cutting edge to split. I would also recommend using Nyloc Nuts
As for the used plow, depending on how much of the trip edge was worn away...
If it is a safe amount then I would remove the used cutting edge and save it. Wear the trip edge down as stated above. When you get to the point of needing a cutting edge, install the used one and use it as long as you can, then buy a new one.
If the trip edge is worn too far then remove the old cutting edge and replace it.
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My theory is this...Why take a brand new 6" base angle and just grind it away?? Bolting on the cutting edge from the start will double the initial life of the base angle...and If you use your shoes....you will quadruple the life of the base angle AND cutting edge. Base angles are not cheap and I'm not replacing my cutting edge every 2" of wear.. Between the shoes, new base angle, and new cutting edge with carbide Plow Extendors...That's ALOT of metal touching pavement that will last quite a long time...And for all you Shoe Nay-Sayers...my **** scrapes just as good as any other without them !!mgf250;472962 said:
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cutting edge wear rate
A new base angle trip edge and a new cutting edge are both 6" high. This means that when the plow is lowered to the ground, both parts are touching the ground. When you drive forward with the plow down, both the cutting edge and trip edge are going to grind away at the same rate.
If this is so, then there is no advantage to installing a cutting edge on a new trip edge.
A new base angle trip edge and a new cutting edge are both 6" high. This means that when the plow is lowered to the ground, both parts are touching the ground. When you drive forward with the plow down, both the cutting edge and trip edge are going to grind away at the same rate.
If this is so, then there is no advantage to installing a cutting edge on a new trip edge.
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I just pulled the cutting edge off of mime and it scrapes a lot better now. With the cutting edge and base angle both on the pavement you reduce the PSI by 1/2. If you get X hours plowing with both on the pavement. With just the base angle you will get 1/2 X hours. Then you put the cutting edge on it and you get another 1/2 X hours. So you get the same amount of time but better scraping. So I would say run the base angle until about 2 1/2 to 3 inches are worn off then put a cutting edge on it.Wicked500R;481173 said:
Here is a pic of one which was let go a little to long. Not my Pic I pulled it from another thread here.
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Yeah...I never thought of it that way...
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I went a season with a new Fisher 8' HD and then put the cutting edge on the second season. The base angle got some wear and everything seems to be good. I would say that with a plow like that you should have a good amount where the cutting edge extends past the base angle.
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Proof is in the picture
Thanks for posting those pictures.
The second picture shows what happens if you wear down your base angle too far, see how close the bolts are to the bottom of the spring brackets. If the owner allowed that to go any further, the springs would have started coming out.
The new cutting edge brings the plow back to the appropriate height and angle.
Thanks for posting those pictures.
The second picture shows what happens if you wear down your base angle too far, see how close the bolts are to the bottom of the spring brackets. If the owner allowed that to go any further, the springs would have started coming out.
The new cutting edge brings the plow back to the appropriate height and angle.
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This correct I know I got a used truck today and didn't have time to change the cutting edge and one of the springs came out and one more was about to come out.mgf250;481540 said:
I welded everything up so it's good now and installed a 8 foot 8 inch cutting edge if you have the blade down alot get a 8 inch x 5/8 cutting edge it will help out a lot (I only got the 1/2
).Good luck plowing
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