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JD A ... one more try

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Bob

08-07-2002 17:12:28




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Can someone tell me if there's SOMETHING that goes on the studs that hold the rocker arms to the head BEFORE the rockers go on? On the back of the pieces that go onto the studs there are recessed circular areas that look like a nut or gasket should go in them, but the parts book doesn't show anything going there. There is a space of some sort listed in the parts book, but I'm not sure it goes there and the parts book says it applies only to A's up to 400 thousand something, while mine is 557 thousand something. Surely SOMEONE familiar with these engines can help me here?

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Clooney

08-07-2002 19:02:18




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 Re: JD A ... one more try in reply to Bob, 08-07-2002 17:12:28  
Bob, I'm not exactly sure what you are working with there.
~That spacer goes over the actual round rocker shaft [between the rocker arms] & the stud that the rocker shaft mounts on goes through the slot in the spacer with the tapered retaining nut centered in the slot. That spacer [actually it is more like a rocker arm spacer] is only used on the earlier tractors that don't use a rocker shaft stand, but use a long stud with a hex on it.
~On your tractor, try installing the rocker shaft on the head [without push rods] first to make sure it fits tight to the head, if not find out what is interfering with a good fit. Then when you are sure it fits correctly remove the rocker shaft & re-install using the push rods. Also make sure [ALL] the valves are movable, if you have a stuck or sticking valve you will break something when installing the rocker assembly..... ...

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Bguy

08-07-2002 18:04:57




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 Re: JD A ... one more try in reply to Bob, 08-07-2002 17:12:28  
Bob, According to the manual I have the is a "Tappet Lever Spacer(2used))" JD part # A234R that can go under the tappet lever. However they were used only up to S.N.487999. There is probably a recessed area cast in this part to accomodate this spacer and after the redesign of the tappets they continued using the same lever. I am more familiar with the model B and on those the tappet lever slides on the stud right up against the head and tightened down.
Hope this helps.

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