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John Deere B push rod tubes

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Jason Z in MO

04-12-2004 02:28:46

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I would like to replace the push rod tubes as I am rebuilding SN 81291.

The service manual uses a special tool to remove install and seat new tubes. Do I need the tool or is there another way?

I had the head rebuilt but the tubes were not mentioned. After they cleaned the head I can see some pretty good pits on the water side of the tubes. I assume they are the original steel tubes. I believe the replacements are brass.

Thank you all!

Jason

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Picture of Special Tools

04-12-2004 21:50:36

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Re: John Deere B push rod tubes in reply to Jason Z in MO, 04-12-2004 02:28:46

I just posted a picture of the special pushrod removal and install tools in "parts & pieces" along with some information. Hope that helps you.

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Jason Z in MO

04-13-2004 07:17:51

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Re: Re: John Deere B push rod tubes in reply to Picture of Special Tools, 04-12-2004 21:50:36

Thank you very much! The picture and discription helps a great deal.

I also found out the tubes are tapered so they must be installed and removed from the rocker side of the head.

Are these tools still available?

Jason

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Jake

04-13-2004 20:46:01

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Re: Re: Re: John Deere B push rod tubes in reply to Jason Z in MO, 04-13-2004 07:17:51

I don't know about availability. The tools were made by OTC (Owatona Tool Company) in Minnesota.
That set was on Ebay a while back and that is where I got the picture from.

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John

04-12-2004 11:03:27

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Re: John Deere B push rod tubes in reply to Jason Z in MO, 04-12-2004 02:28:46

JD has the tubes, they are brass. I made a driver form mine on a lathe. Beat the old ones out, cleaned up the holes, loc-tite in the holes and on the tubes, and beat the new ones in. I didn't swell either end and so far all is well. I am get home today and find the crankcase full of water. I think I got the JD part number from Clooney as the local Deere man is 2 cyl challenged. He thinks an 830 was built in Japan and has 3 cylinders. What a sad life to live!

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Double H

04-12-2004 07:15:20

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Re: John Deere B push rod tubes in reply to Jason Z in MO, 04-12-2004 02:28:46

Just rebuilt the head on my JD B. Push rod tube,
valve quide tubes purchased from Sharp's, machine shop installed with no problem. Same problem pitting to the point of water leak.

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Mark Scholten

04-12-2004 04:26:27

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Re: John Deere B push rod tubes in reply to Jason Z in MO, 04-12-2004 02:28:46

I made a push rod tube tool. If you don't have access to a lathe, take a tube to a machine shop, have them turn a piece of stock to fit the inside of the tube and a shoulder that is the same diamater as the outside of the tube. That allows the tube to be pushed out. When reinstalling, slide a washer on the stem of the tool as a stop so when you install the new tubes, you don't go to far.
Mark

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easydoesit

04-12-2004 08:15:08

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Re: Re: John Deere B push rod tubes in reply to Mark Scholten, 04-12-2004 04:26:27

Mark, I recently purchased some pushrod tubes from JD for my unsty B. The tubes purchased however are slightly larger than the tubes presently in the unstyled head. Can you believe that they were for the styled head and do you have a source of tubes? easy

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Jason Z in MO

04-12-2004 09:02:34

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Re: Re: Re: John Deere B push rod tubes in reply to easydoesit, 04-12-2004 08:15:08

Easy,

Do you still have the new tubes or did you return them?

I still need pick mine up from JD. I need 4 AB1284R

Jason

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easydoesit

04-13-2004 06:38:40

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Re: Re: Re: Re: John Deere B push rod tubes in reply to Jason Z in MO, 04-12-2004 09:02:34

Jason, I still have the tubes..I only got 2 at the time....and I still need to find some smaller ones. I ordered 1284's. You are working with an unstyled head right?

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Jason Z in MO

04-13-2004 07:04:37

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Re: Re: Re: Re: Re: John Deere B push rod tubes in reply to easydoesit, 04-13-2004 06:38:40

Easy,

I have an early styled tractor SN 81291 with 175ci block. The parts book calls for this part. Is this the same part for the un-styled?

Jason

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Jason Z in MO

04-12-2004 04:37:45

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Re: Re: John Deere B push rod tubes in reply to Mark Scholten, 04-12-2004 04:26:27

Mark,

Thanks for your comments!

The service manual talks about... "reversing the driver, inserting the tapered end into the new sleeve. Tap sharply to expand sleeve, sealing it in the head."

Is this necessary with the new brass sleeves?

Jason

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Mark Scholten

04-12-2004 11:35:06

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Re: Re: Re: John Deere B push rod tubes in reply to Jason Z in MO, 04-12-2004 04:37:45

It isn't nessessary to expand the tubes but I recommend it. Besides, if you show your tractor, the correct police may search you out and scold you for not being proper!!!

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Jason Z in MO

04-12-2004 13:52:25

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Re: Re: Re: Re: John Deere B push rod tubes in reply to Mark Scholten, 04-12-2004 11:35:06

My goal with the new tubes is to prevent any water from getting into the oil. So whatever is correct to achieve that goal I want to do.

As for the correct police... I'm not to worried about them. They're not going to be taking off any valve covers or heads while I am around! Besides, to be "correct" wouldn't I need to find original steel tubes??? :)

I think I will take your suggestion and expand the tubes as recommended!

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04-12-2004 06:51:15

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Re: Re: Re: John Deere B push rod tubes in reply to Jason Z in MO, 04-12-2004 04:37:45

Yes you need to expand one end of the tubes. I put pematex on both ends of the tube and use a larg tapered punch to expand the sleeve.

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