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Adjustable three point linkage binding up

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Bruce L.

12-01-2002 21:08:46




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Another question as I try to finish my 630 restoration. The threaded three point linkage height adjustment on one side is really bound up. I can turn it but only with my biggest pipe wrench and a cheater. The more I turn it the tighter it seems to be getting. I have been using penetrating oils which seem to be reaching the area I want to soak. I have the partial assembly on the bench with one end in a vise. I am sure that there is rust on the lower portion of the threads. As I try to turn the adjustment out, it really tightens up. I am wondering if there is something I can use that would safely dissolve the rust. This three point is in excellent condition otherwise. It appears to have had little use. All joints are very tight.

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Clooney

12-02-2002 04:22:27




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 Re: Adjustable three point linkage binding up in reply to Bruce L., 12-01-2002 21:08:46  
Bruce, Scott covered the basic crud part of it. I will add that there are 3/16" roll pins in the very bottom of the lift link threaded sections & if they aren't removed will mess the threads up in the cast body parts if you try to unscrew them past the normal part of the travel. ~To remove the roll pins try to line the pins up with center holes in the lift link body then drive the pins out. In a lot of cases I have had to heat those pins or even drill them out [they're hard, so will need heat to soften, or a good carbide bit]. There is also a difference in the thread length between the L/H & the R/H sides..

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Scott

12-01-2002 22:24:23




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 Re: Adjustable three point linkage binding up in reply to Bruce L., 12-01-2002 21:08:46  
Bruce: I had the same problem on both sides when I was restoring my 620. I tried for weeks soaking them in every penetrating fluid I could get my hands on, but they still would only slightly turn. A friend ended up taking a torch and heated the adjustable upright while I spun the threaded portion out. They were full of rust and other crud. I cleaned/repainted them and they work perfect now. I hope this helps.

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