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Top link rocker repair

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Barnstormer

05-06-2003 06:30:33

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The 3 position rocker on this 8N I'm working on has worn oblong holes where it mounts to the diff. casting. Has anyone reemed the rocker holes and fitted or machined bushings to take up the wear sloppiness?
I have rebuilt the internals (including replacing the cam pin) and adjusted them by the book and verified the adjustments with the jig that I bought from Zane. I want to eliminate the external wear.

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Tom-Pa

05-07-2003 11:01:44

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Re: Top link rocker repair in reply to Barnstormer, 05-06-2003 06:30:33

I did the cat2 bushing to cat 1 and just put it in the lathe to turn down to the cleaned up hole. The advantage of doing this is you can then leave a lip on the bushing to keep it from going completely thru..In fact. One bushing made 2 bushings...even old lathes can be handy...turned the bushing down with a lip on each end and then cut in half..
lots of Ideas here, welding i think would be the worst on cast...
Tom-Pa

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2fordsmike...new one?

05-06-2003 11:18:04

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Re: Top link rocker repair in reply to Barnstormer, 05-06-2003 06:30:33

Some good restoration ideas here, but...Recently there was an advertisement for a new reproduction of this part. Yes, I'm looking, but haven't found it yet. Mike-Iowa

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souNdguy

05-06-2003 06:45:59

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Re: Top link rocker repair in reply to Barnstormer, 05-06-2003 06:30:33

Though I've never done it.. sounds like a good way to go.. machine out the hole, and bushing with a cat1 spacer bushing, like they sell to bush up the cat 1 pins for cat 2 hardware...

other options? weld it up... not sure how that would do on the cast...

anyone else?

Soundguy

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good idea . . . Dell (WA)

05-06-2003 08:46:36

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Re: Re: Top link rocker repair in reply to souNdguy, 05-06-2003 06:45:59

good idea using cat-2 to cat-1 adaptor sleeves as bushings to repair your wallered out castiron toplink holes.

BUT..... .DON'T WELD CASTIRON, you'll pop-off those mounting ears. Braze is ok, maybe. Maybe J&B Weld more better? Maybe "stake 'em" in place? Sometimes you really have to be clever in repairing old stuff..... .....Dell

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markct

05-06-2003 09:20:33

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Re: Re: Re: Top link rocker repair in reply to good idea . . . Dell (WA), 05-06-2003 08:46:36

the only problem with using the cat 2-1 bushings is that they are 1/8" wall thickness,that means that when you bore out the toplink bracket you need to make a 1" hole, that doesnt leave much material left around it. also another problem is that the hole in alot of those cat1-2 reducer bushings is a pretty sloppy fit for a cat 1 pin, so after you bush it it may not be too much better. if i were going to do this sorta thing i would probably just machine out some bushings that would fit properly with a thinner wall,since ya gota machine the bracket anyhow. on my fathers NAA the toplink bracket was all eged out so i just fabricated an entire toplink rocker from steel plate and welded it together,i made it a bit deeper too since many of the heavy duty toplink brackets have thicker eyes on them and wont fit the normal toplink rocker.

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souNdguy

05-06-2003 10:22:20

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Re: Re: Re: Re: Top link rocker repair in reply to markct, 05-06-2003 09:20:33

The new fabricated toplink rocker sounds like the ultimate way to go.. some cutting and welding and walla!

Back to fixing it, what about just building it back up with brazing material? and then fileing / drilling / honeing out for close fit?

It might be a bit soft.. but them many bushings are brass / bronze anyway for heavy equipment.

Well, at tleast the original poster has quite a few options.. some easy, some cheap, aside from direct replacement.

Soundguy

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markct

05-06-2003 12:38:00

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Re: Re: Re: Re: Re: Top link rocker repair in reply to souNdguy, 05-06-2003 10:22:20

i will try to get some pics to post of the toplink bracket i made. it works good, not original but i could care less, and my father who actualy owns the tractor could care even less than me about originality. i think that your idea of brazing them would probably be best, i am not sure tho if these toplink rockers are cast or forged, or cast steel as oposed to cast iron. i have seen them welded before, the one on out ford 3400 has been welded, and also the one that was on our NAA that i replaced with the fabricated one had been welded before,it seemed to have held well and it had been done before my dad got the tractor over 25 years ago. it didnt apear that they had welded it with nickel rod (used for cast iron) or anything special, thats why i am wondering if they are cast steel or a forging,also they seem like they would need to be thicker if they were cast iron, but i could be wrong

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souNdguy

05-07-2003 04:50:02

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Re: Re: Re: Re: Re: Re: Top link rocker repair in reply to markct, 05-06-2003 12:38:00

Yeah, I don't know myself .. what they are.. was just making a worst case scenerio guess.

Though come to think of it.. I have seen the front axle areas welded up and they have held on the tractors i know in the area that have them.. wonder if they are cast steel??

Any way, thanks

Soundguy

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markct

05-07-2003 12:53:35

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Re: Re: Re: Re: Re: Re: Re: Top link rocker repair in reply to souNdguy, 05-07-2003 04:50:02

i am sure the front axle itself is a forging, i have seen tractors that were in hot barn fires and they have actualy had the front axle droop down from the heat, i think cast would just crack and break when it cooled if it even bent in the first place

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souNdguy

05-07-2003 13:12:16

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Re: Re: Re: Re: Re: Re: Re: Re: Top link rocker repair in reply to markct, 05-07-2003 12:53:35

I gotcha.. come to think of it.. I've seen the same from a pic of an N from a barn fire.. looked like a special 'low' crop model.. instead of a -row- crop model...

Soundguy

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