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29er / Re: AM831 - The flex-fix
« on: March 29, 2022, 07:52:05 PM »
Thought I'd post JJJ's email here with the original instructions:
"The bolt diameter is somewhat close to its upper tolerance limit (at least for the ones I mounted), so it doesn't go smoothly through the 6802 bearing. It doesn't require too much hassle though (gentle tapping until you reach the threads in the link). The advantage is that it fits snugly in the bearing.
The edge of the bolt head is somewhat sharp, so you will probably need to sandpaper it a little.
Important reminder: only tighten the bolt "finger tight", the purpose being only to compensate the axial clearance. The "finger tight" sensation is a little difficult to feel with the tight fit of the bolt. Tighten while turning the link; when you feel a crunching sensation in the link, stop and back-off a little until the turning becomes smooth again.
It's the role of the M8 grub screw to hold the bolt in place, tighten that one sufficiently when you've finger-tightened the bolt. Beforehand, insert the grub screw through the tip of the bolt. You can then use a 4 mm Allen wrench to tighten it through the bolt head.
DO NOT use the bolt to squeeze the 6703 bearing into its recess. The 6703 bearing should be in its final position before you insert the bolt. If necessary, use a bearing press to fit the 6703 bearing in its recess.
Since the recess for the 6703 is not so "clean", depending on the paint and resin jobs, there may be a break-in period after which you may need to tighten the bolts a little more."
"The bolt diameter is somewhat close to its upper tolerance limit (at least for the ones I mounted), so it doesn't go smoothly through the 6802 bearing. It doesn't require too much hassle though (gentle tapping until you reach the threads in the link). The advantage is that it fits snugly in the bearing.
The edge of the bolt head is somewhat sharp, so you will probably need to sandpaper it a little.
Important reminder: only tighten the bolt "finger tight", the purpose being only to compensate the axial clearance. The "finger tight" sensation is a little difficult to feel with the tight fit of the bolt. Tighten while turning the link; when you feel a crunching sensation in the link, stop and back-off a little until the turning becomes smooth again.
It's the role of the M8 grub screw to hold the bolt in place, tighten that one sufficiently when you've finger-tightened the bolt. Beforehand, insert the grub screw through the tip of the bolt. You can then use a 4 mm Allen wrench to tighten it through the bolt head.
DO NOT use the bolt to squeeze the 6703 bearing into its recess. The 6703 bearing should be in its final position before you insert the bolt. If necessary, use a bearing press to fit the 6703 bearing in its recess.
Since the recess for the 6703 is not so "clean", depending on the paint and resin jobs, there may be a break-in period after which you may need to tighten the bolts a little more."