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Posted: 8/20/2009 5:01:58 PM EDT
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I've never installed one that needed to be indexed before. I bought an MSTN QCB 6.8. It came with a a series of washers but no matter how I play with them I can't get it indexed just right. What am I doing wrong? I was hoping to have this all put together for the weekend. |
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You aren't doing anything wrong. I have Crush Washers, Shims, Peel Washers and,,,,,,,,,,,, Smaller Spark Plug Washers when all else fails. Crush Washers are great but Spark Plug Washers have fixed more than a couple for me.
Kinda like Bailing Wire used to be long ago. Good Luck, SO-13 |
| you can get a full 360 degrees of indexing from a crush washer. just make sure you are using a upper vice block and a proper wrnech to tighten it down, if you need to apply a little gun oil to the threads. But with the proper tools there is no way should no be able to index one |
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Quoted:
You aren't doing anything wrong. I have Crush Washers, Shims, Peel Washers and,,,,,,,,,,,, Smaller Spark Plug Washers when all else fails. Crush Washers are great but Spark Plug Washers have fixed more than a couple for me. Kinda like Bailing Wire used to be long ago. Good Luck, SO-13 Crush washers come in all sorts of thickness'. Choose on close to what you need if you have a bunch. Most people, don't. Support the barrel and set torque wrench to the lower value, tighten and back off. Repeat, increasing torque, until it indexes. Wish I'd thought of spark plug washers. This seems like a no brainer. Available, cheap and thin as hell. Go get some. Thanks SO- won tree 458 |
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You'll also find it helps to lube the faces of the crush washer generously with CLP or another light oil. It indexes easier. For the MSTN brake, it's a lot like the Surefires. I think the washers are different thicknesses. You stack and add them until the brake stops about 15 degrees short of where it's lined up properly, then torque it down to alignment. There is some trial and error to it, just be patient. |
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Quoted: You'll also find it helps to lube the faces of the crush washer generously with CLP or another light oil. It indexes easier. For the MSTN brake, it's a lot like the Surefires. I think the washers are different thicknesses. You stack and add them until the brake stops about 15 degrees short of where it's lined up properly, then torque it down to alignment. There is some trial and error to it, just be patient. Not my strong point.  |
| I have a similar problem. Just received a used model one upper and the FH is off about 30-45 degrees. It appears to have a crush washer. What suggestions do you have for getting it indexed correctly? Can I just used a crescent wrench and try and get it turned or do I need a torque wrench? Do I need to get an upper vice? |
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Quoted: I have a similar problem. Just received a used model one upper and the FH is off about 30-45 degrees. It appears to have a crush washer. What suggestions do you have for getting it indexed correctly? Can I just used a crescent wrench and try and get it turned or do I need a torque wrench? Do I need to get an upper vice? Wrap the barrel in a section of garden hose (slit long ways down one side) that is long enough to cover your vise jaws. Clamp the wrapped barrel down in the vise. You should spray the washer/FH joint down with some penetrating oil (WD40 or similar) and let it sit a few minutes. Use your crescent wrench to index the FH. You may find it helpful to loosen and tighten several times to help the washer compress, it should crush a little more each time. |
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Quoted:
Quoted:
I have a similar problem. Just received a used model one upper and the FH is off about 30-45 degrees. It appears to have a crush washer. What suggestions do you have for getting it indexed correctly? Can I just used a crescent wrench and try and get it turned or do I need a torque wrench? Do I need to get an upper vice? Wrap the barrel in a section of garden hose (slit long ways down one side) that is long enough to cover your vise jaws. Clamp the wrapped barrel down in the vise. You should spray the washer/FH joint down with some penetrating oil (WD40 or similar) and let it sit a few minutes. Use your crescent wrench to index the FH. You may find it helpful to loosen and tighten several times to help the washer compress, it should crush a little more each time. Success! Worked like a charm. Thanks! |
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