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John Deere Tractors Discussion Forum
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Re: JD 1209 Mower Knife Drive Arm

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Author  [Modern View]

07-23-2013 09:24:44

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I bought 2 new hold downs from the JD dealer but they were the low cast-iron ones. They didn't give me an option. I will check with them again.
I also bought new wear plates. Do they need to be set all they way back near the knife head?

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Roger in Iowa

07-23-2013 16:46:35

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 Re: JD 1209 Mower Knife Drive Arm in reply to philsmith, 07-23-2013 09:24:44  
The wear plates should be all the way back on all locations! There should not be any wear plates near the knife head area. The knife has to move fore and aft as it strokes.

The pin should not be loose in the arm. The bolt should be torqued to I believe 150 ft-lbs to retain the pin for the knife head. If it wiggles, it can break the knife head or arm. Tight, tight, tight!.

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07-23-2013 10:23:47

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 Re: JD 1209 Mower Knife Drive Arm in reply to philsmith, 07-23-2013 09:24:44  
My dealer gave me the same low arched hold downs when I had the problem with the knife bar braking. You got to remember, sickle bar mowers are a thing of the past and not to many people are up on them, exspecially parts guys who don't have much experiance on them. Before I realised that the hold down was the problem I chnaged the pitman arm because there was a little slop in the pin. This did not make a difference. I will try to remember to take a picture of my knife bar to show the difference and post it later tonigth or tomorrow.

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