Ordered the new nut and washer, some loctite and hopefully this will never happen again.
Today the new 12mm nut arrived. Cleaned the threads, put some Loctite on there for my head and torqued to 70NM. Hope the problem is solved
I am thinking 'Red Locktite' - Gnasher?
If it's Loctite go for 270 green, but you'll need to apply heat first to remove it.
I assume a normal butane torch can provide enough localised heat for this..?
And if 270 green is the best/extreme, what the next best that doesn't require a blowtorch..?
I just used the normal blue Loctite. If this would ever loosen again I will probably go with Loctite 638.
Could you school me on the importance of the washer? Of course I bend it but it should be only an additional security or am I missing something?
- That shadow looks like a tab washer was on there that hasn't been folded over. - Another one here for loctite 243.
Quote from: celticbiker on 05 July 2021, 07:44:33 am- That shadow looks like a tab washer was on there that hasn't been folded over. - Another one here for loctite 243.- Common mistake by people that dont know what they are doing.- Gnasher has recommended Green 270
If anyone needs the new nut and tab washer kit I have one sitting right beside me, I sold my 600 years ago now, kit no. is 90891-10124.Anyone near south cambs. is welcome to collect it or cover postage.
Personal view The sprocket nut is there to stop the sprocket sliding off the output shaft. It doesn’t need to tighten flush with the sprocket to do this. The output shaft is the fault on some of the fazers. The grooves in some output shafts are cut a slightly too wide. This allows the sprocket to move backwards and forwards on the shaft when placed under load or off load. Because the nut is tight against the sprocket it continually rotates slightly on the threads… wearing them out. The answer in my opinion is grind down the flange on the sprocket nut so that when it tightens on the shaft it is simply flush with the sprocket but does not tighten against it…. And put some grease on the sprocket to further ease the junction between the nut and sprocket. Therefore there is insufficient ‘grip’ between the sprocket and the nut to allow the sprocket to turn the nut. In essence you want to tighten the nut up on the output shaft but not tighten it up against the sprocket.
Quote from: Captain Haddock on 13 September 2021, 08:56:38 pmIf anyone needs the new nut and tab washer kit I have one sitting right beside me, I sold my 600 years ago now, kit no. is 90891-10124.Anyone near south cambs. is welcome to collect it or cover postage.Hello mate, have you still got this nut and tab washer kit?