Flip over saw head locking knob loose / not locking

[MattD]

Hello All,

I have a 18ish year old MacAllister flip over saw and it has just started to not lock into place when being used as a table saw. I've tried to tight the internal bolt and also the allen/hex "lugs" on the locking knob but have not been able to rectify the issue. Does anyone have any suggestions on how I can tighten the knob so that the saw head stays in place? Link below is to a dropbox folder with some images.

https://www.dropbox.com/scl/fo/myib...CwZBzFm8?rlkey=7j9oi3y4ncrlac49tzkvaphrq&dl=0

If any one is able to advise me on how to resolve it I would b very grateful.

Many thanks,

Matt.

 

[Amplidyne]

Unless you're lucky enough to find someone with the same saw, who has fixed the same problem, then the only way I know to deal with things like this is to strip it down, clean it all up properly, and examine it carefully under a good light. Experience says there is sometimes a crack in the plastic somewhere that is opening up under pressure. Not always easy to find.
Good luck.