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Implement Alley Discussion Forum

Moldboard plow question

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Chuck NH

05-23-2007 14:19:44




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Why are there shims between the moldboard and frog? Some I have seen with a steel shim and others I have seen a gasket type paper.....




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richard in nz

05-25-2007 01:59:06




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 Re: Moldboard plow question in reply to Chuck NH, 05-23-2007 14:19:44  
Just there to correcly position the mouldboard to the back of the share to prevent a step between the share and mouldboard which soil would stick to and spoil the scouring qualities of the plough.



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georgeky

05-24-2007 06:08:20




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 Re: Moldboard plow question in reply to Chuck NH, 05-23-2007 14:19:44  
The frog should be a little triangular shaped piece mounted to the bottom directly in front of the landslide. Is this what you are talking about. Anywho,lots of these moldboards,shin,shares and so on are after market and do not fit real well and sometimes shimming may be necessary to get a good fit.



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Gerald J.

05-24-2007 09:14:14




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 Re: Moldboard plow question in reply to georgeky, 05-24-2007 06:08:20  
The frog is the piece that the landside, moldboard, shin, and share bolt to and that frog then bolts to the plow frame. Sometimes useing the same bolts that hold the landside.

Gerald J.



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georgeky

05-24-2007 16:48:10




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 Re: Moldboard plow question in reply to Gerald J., 05-24-2007 09:14:14  
Yea thats it.



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Rich Va

05-24-2007 05:56:55




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 Re: Moldboard plow question in reply to Chuck NH, 05-23-2007 14:19:44  
My definition of a shim is the curved piece that mounts to the left side of the moldboard. This piece takes a lot of wear off the moldboard.



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Dave Anderson

05-23-2007 15:42:03




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 Re: Moldboard plow question in reply to Chuck NH, 05-23-2007 14:19:44  
Sometimes there is a difference in curvature between the moldboard and the shin. shims are to correct this, and wear, as you will replace a few shins before you replace the moldboard.



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Chuck NH

05-23-2007 18:05:21




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 Re: Moldboard plow question in reply to Dave Anderson, 05-23-2007 15:42:03  
When you say shin, do you mean the wear part (I always called it a share) that cuts the bottom of the furrow and mate up to the bottom edge of the moldboard?



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Randy as in Randy-IA

05-23-2007 18:34:11




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 Re: Moldboard plow question in reply to Chuck NH, 05-23-2007 18:05:21  
Hi . No , a shin is a seperate verticle cutting edge in front of the moldboard . Some plows don't have a shin , the moldboard serves that function .



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Chuck NH

05-23-2007 19:27:47




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 Re: Moldboard plow question in reply to Randy as in Randy-IA, 05-23-2007 18:34:11  
So if the moldboard does not have a replacable shin, why would there be a shim between the moldboard and frog? I'm guessing that it may be to: (a)align the face of the moldboard and share to each other, (b)act as a cushion for shock loading, and (c)stop the moldboard wearing into the frog. Just one of the many stupid questions asked when two guys are looking at a set of plows during reassembly..... Thanks for all your answers! Opps, forgot about (d), all the above.

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Randy as in Randy-IA

05-24-2007 14:55:21




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 Re: Moldboard plow question in reply to Chuck NH, 05-23-2007 19:27:47  
Hi , what does this shim look like ? How thick is it ? I'm really not an old time plow expert but still sort of learning also . What plow is this on ? ...Randy



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Chuck NH

05-24-2007 18:05:21




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 Re: Moldboard plow question in reply to Randy as in Randy-IA, 05-24-2007 14:55:21  
I was working on a ferguson 3ph 2 bottom plow. Nuts on the back side of the moldboard had almost rusted off, so I cut off the plowbolts to replace. I found a homemade shim (piece of thin tin under the moldboard where it mounts to the frog, so I had to ask the question why. I do know the difference between a share, shin (this plow does not have any) frog, landside, and etc. While replacing the moldboards on a friends Dearborn 2 bottom plow this spring, he had triangular shim made of tin (can still get from Ford) under his moldboards as well. While rebuilding my John Deere 411 plow a few years ago, I found what appeared to be gasket or felt paper between the moldboard and the frog. Tonight I reinstalled the moldboards on the ferguson plow without the shim. Not happy with the contact on the back side of the moldboard to the frog, but hardware is tight. I guess time will tell!

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JMS/MN

05-23-2007 22:10:28




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 Re: Moldboard plow question in reply to Chuck NH, 05-23-2007 19:27:47  
IF.. there were a shim involved- it would be to raise the lower portion (plowshare), above the next portion, so the dirt flows down to the next one. ie- if the dirt flowing off the plowshare were to hit the moldboard, it would wear off the leading edge. So the leading edge of the moldboard should be even with or below the trailing edge of the plowshare. Moldboard wearing into the frog? Makes no sense- the moldboard mounts onto the frog- so does the plowshare, and the shin, if there is one. Might be some mis-identification of parts.

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RodInNS

05-23-2007 19:47:48




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 Re: Moldboard plow question in reply to Chuck NH, 05-23-2007 19:27:47  
I've never heard of or seen a shim under a moldboard, and can't for the life of me understand why one would be needed. It ain't puttin the space shuttle in orbit... but mabey I'm just plain wrong.

Rod



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