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I'm trying to replace the frame bearings in my Whyte and can't undo the main swing arm pivot pin. The diagram below from the manual shows the arrangement. The diagram is missing the bolt that goes through 19/20 into the RHS of the pivot pint (12). That's the one that I can't undo from the pivot pin. This almost certainly just wants a good soak in some release agent and a big spanner but I was wondering if there was more too it as the manual says:
"using the 5mm A/F Allen Key, partially unscrew the M6 x 20 long Capscrew (10) from the Pivot Pin 80mm long, expanding collet, M15 thread (12). Using the 6mm AF Allen Key, unscrew and remove the Pivot Pin 80mm long, expanding collet, M15 thread (12). The capscrew (10) may now be completely removed, to allow the tapered sleeve (11) to be released from the collet (12)."
The bit that doesn't make sense is what is the point of partially unscrewing the cap screw (10). It doesn't say but I wonder if I need to give it a clout to free something off.
Any thoughts or experience gratefully received before I start getting heavy with it.
Bumpity bump!
If it the same as the newer T130, it is a funny arrangement as one side of the pivot undoes the opposite way. The loosening direction should be marked.
I can't see the picture but I'd guess that the pivot pin m15 threads into something and the cap screw m6 threads onto the end of the pivot pin.
If that's the case, loosening the cap screw would prevent it from spinning against the frame and damaging stuff. Also, if the cap screw is tightened up against something (frame?) backing it off will remove any extra tension on the pivot pin and make it easier to remove? I wouldn't go clouting anything just yet. If it's telling you to use an allen key, then it's threaded into something and percussive maintenance probably won't help.
But yeah, as above... Are you definitely turning it in the correct direction? Sometimes frame pivots are righty loosely, lefty tighty