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Ford 9N, 2N & 8N Discussion Forum
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Top Link Rocker Pin Stuck

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Patrick/N-Tiques/OR

02-27-2005 15:49:41




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Need a little advice.... My top link rocker is broken on my 861 and I need to replace it. But, I can"t get the pin out of the housing that holds the base of the rocker in place.

I heated the housing up with an oxygen-acetylene torch until it was red hot and let it cool. This pin is stuck.

Anyone have any other ideas?

I am about to take it to a machine shop to have it cut out.

Thanks In Advance
Patrick

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Michael in PA

02-28-2005 07:33:55




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 Re: Top Link Rocker Pin Stuck in reply to Patrick/N-Tiques/OR, 02-27-2005 15:49:41  
I went through this recently as well, and it is a bear. Heating didn't work for me, so I used a C-clamp style U-Joint press to pop it out. But it wasn't easy :)

I left the new pin in the freezer overnight before installing it, to give a few extra thousandths of clearance, and tapped it in with a rubber mallet, so that the pin wouldn't deform.

You may want to try packing the area in dry ice: both the pin and the hole may receed, giving a tiny little bit of extra clearance. Also, try pressing it both ways, because the bin may have a belled end if someone took a hammer to it previously.

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flathead

02-28-2005 05:44:48




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 Re: Top Link Rocker Pin Stuck in reply to Patrick/N-Tiques/OR, 02-27-2005 15:49:41  
Mine was stuck pretty good too. The pin in mine was hollow. To get it out I turned a two-piece driver. The first piece had a slighly smaller diameter than the pin hole with a spigot on the end to fit into the pin. I cut this off short enough to fit between the center pin boss and the right housing boss. I drilled a hole in the outboard end of this piece. The second piece was slightly smaller than the hole in the right side housing boss with a spigot turned on the end to fit in the hole drilled in the first piece. Once the driver was assembled in place, I applied the flame wrench and pb blaster and knocked it out with a 2-lb ball peen.

flathead

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Larry 8N75381

02-27-2005 17:46:14




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 Re: Top Link Rocker Pin Stuck in reply to Patrick/N-Tiques/OR, 02-27-2005 15:49:41  
I had to get one out of my Ford 3000. What a BATTLE!!! My renter at the time had a hydraulic bottle jack, 12 ton I think. I was able to rig up a way to jack against the pin by using a 4" I beam that I just happened to have. I turned a piece of steel bar so that one end had a short tapered end that would set inside the pin about an inch. Then the bar had a shoulder about 2 inches long that would bear against the pin, the OD of the bar being turned to fit inside the hole in the diffy boss with good clearance. The other end looked the same but was so that it would go about 3" inside the pin. I started with the long end in and the short out, at half way I turned the bar around since the end had gotten to the face of the boss. The long end then stuck out enough to push the pin the rest of the way thru.

I heated the diffy boss as hot as I could and then started to jack against the pin while it was hot. I got it to just move with all I could pull on the jack pump handle. I got about half way before it cooled and I just could not move it any more. A second heating got it out, FINALLY!

So while it is HOT you have to push on it! When it cools, stop pushing and heat again. And making a "pusher" bar was also the key to getting it out. A buddy used my bar to get his top link rocker pin out by just beating on it with a big hammer/small sledge. HARD JOB!!!

Good luck!!

Regards,
Larry

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HOOKER

02-27-2005 16:34:46




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 Re: Top Link Rocker Pin Stuck in reply to Patrick/N-Tiques/OR, 02-27-2005 15:49:41  
on some 841's ford and thier new ideas had a brainstorm to put some in with what they call blind bolts that means it's a pin till you get up to the head of the pin and then it goes into threads, try to turn it out and if that doesn't work get a big hammer
just my $.02
jake



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souNdguy

02-27-2005 15:52:30




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 Re: Top Link Rocker Pin Stuck in reply to Patrick/N-Tiques/OR, 02-27-2005 15:49:41  
On my 8n, I had to do a bit of heat and cool cycles, and lots of penetrating oil.. In fact.. I cooled it with the oil. Might also try parafen wax. And tap on it every time you walk by. Got a piercing tip for that oxy-acet rig? I've seen guys blow a hole or a deep pit in a pin to help it get moving.

Soundguy



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