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Fan Belt pulley rehab

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bob in Ky

02-23-2004 18:30:52

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Can anyone give me some ideas on how I can get my fan belt pulley to free up so that I can adjust my pulley belt? As you will recall, the adjustment is in a pinch mechanism that caused the belt to run higher or lower in the groove according to how it is adjusted. I have sandblasted mine in preparation for paint. I have soaked it in penetrating oil, transmission fluid and motor oil. I have used heat and tried to move it back and forth to free it up, but nothing has worked. Any suggestions would be greatly appreciated.

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Dave Grubb

02-24-2004 08:22:58

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 Re: Fan Belt pulley rehab in reply to bob in Ky, 02-23-2004 18:30:52  
I had to use a torch on mine to persuade it to come apart (the pulley was removed from the water pump). Heat the OD part red hot and drive the ID part back with a hammer a lttle at a time. When I got them apart I used a sanding disc on a drill on sanded the outer surface of the ID part down until the parts would mate together and adjust by hand. I painted the parts and coated the outer surface of the ID part with anti-seize when I put them back together. It all takes time and patience.

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Tom Westerfield

02-23-2004 20:07:57

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 Re: Fan Belt pulley rehab in reply to bob in Ky, 02-23-2004 18:30:52  
Hi Bob, This is Tom in W. Ky.-Hopkinsville to be exact. I've tried all that liquid stuff too but there is one special product that is superior to all of them. I'd almost guarantee you good results. The product...available at your local Wal-Mart...is Marvel Mystery Oil. Manufactured as a engine oil and fuel additive, I've found it to be the best...bar none in loosening rusty parts. Squirt it on...leave it overnight. If it doesn't work in one cycle...do it again.

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bob in KY

02-24-2004 12:16:38

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 Re: Re: Fan Belt pulley rehab in reply to Tom Westerfield, 02-23-2004 20:07:57  
Thanks Tom. I will get some of that stuff and see if I can get this thing apart. This thing is a real bugger!

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02-23-2004 19:23:26

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 Re: Fan Belt pulley rehab in reply to bob in Ky, 02-23-2004 18:30:52  
i wire brushed mine and soaked with WD40 like you. i then grabbed the inside where belt runs with a bearing puller (two big half moon clamps that fit around the ID of belt area. i snugge it up, then "punched" the back side of the cup area, where the four bolts mount. hit it gnetly with a hammer about 20 times, watching it move less than 1/16 inch each time. after it was appart i wire brushed again, and still snug. i mounted the one piece in a lathe and filed it down a few thousands till it slid together with antisieze.

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