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Implement Alley Discussion Forum

IHC #21 MOUNTED MOWER ADJUSTMETS???

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1946 BN IHC

06-13-2018 10:39:04




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I am now considering umpacking my A/C 21 mower with 6 foot cutter bar. BUT! I need some help in making abjustments to the hold downs of the knife. I know it was not in proper hold down adjustment when I disassembed and paced it away 20 some years ago. SO!! How does one go about setting the poper knife clearences, so that the knife will shear properly? Thank you for all your input help.
Wm.

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jCarroll

06-14-2018 06:01:27




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 Re: IHC #21 MOUNTED MOWER ADJUSTMETS??? in reply to 1946 BN IHC, 06-13-2018 10:39:04  
something else to look for ........

as you mow, and hit a rock that the cutterbar bounces over,
often the guard which hit the rock will be bent up a little.
This lifts the whole knife off the adjacent guards.

So keep an eye that your guards are lined up - a BH is useful here.



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old

06-13-2018 12:35:19




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 Re: IHC #21 MOUNTED MOWER ADJUSTMETS??? in reply to 1946 BN IHC, 06-13-2018 10:39:04  
Be it right wrong or some where between all I have even done was take a hammer and hit the hold downs to bend them down to the point they are just touching the bar and holding the section down on the guards. Been doing it that way since 1980 on many mowers I have worked on



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wolfman

06-13-2018 18:54:30




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 Re: IHC #21 MOUNTED MOWER ADJUSTMETS??? in reply to old, 06-13-2018 12:35:19  
I've used the hammer method since the late 50s.



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1946 BN IHC

06-14-2018 04:21:57




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 Re: IHC #21 MOUNTED MOWER ADJUSTMETS??? in reply to wolfman, 06-13-2018 18:54:30  
Fellows So as I read what both of you hae witten there is, as apears to me, no exacting science so to speak, such as placing a secton under the hold down plus a feeler gage to test each individual hold down insuring each is equal to start out with, near fatory settings???
I'm astounded!



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old

06-14-2018 08:32:23




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 Re: IHC #21 MOUNTED MOWER ADJUSTMETS??? in reply to 1946 BN IHC, 06-14-2018 04:21:57  
Well it isn't a rocket. LOL You just tap on them till they are close and that is it. I have had bars where the hold down had rubbed the section it rode on shiny you just want to make sure they hold the bar down tight enough that the section sit right down on the guards



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1946 BN IHC

06-15-2018 04:08:11




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 Re: IHC #21 MOUNTED MOWER ADJUSTMETS??? in reply to old, 06-14-2018 08:32:23  
Thank you to each of you. As I have said this mower has been stored in pieces for over 20 years and now I am going to re assemle. I an very suprised at the condition of the bearings, no glitches smooth as silk as the saying goes still has oil in the sump. So wish me the best as I start in to set this mower to functioning.
Thank you again .
Wm.



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old

06-15-2018 07:51:42




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 Re: IHC #21 MOUNTED MOWER ADJUSTMETS??? in reply to 1946 BN IHC, 06-15-2018 04:08:11  
Over the many years I have messed with stuff I have built 2 or 3 sickle bar mower form junk ones. Built a belly mount one for a Farmall B and used a power steering pump for the hyds on it. A couple years ago I took a JD #9 that was missing a good number of parts and used what parts I had laying around to make it work again. Pain t put on. Let a friend use it and he broke it in less then 48 hours

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