The BSA A7-A10 Forum
Technical (Descriptive Topic Titles - Stay on Topic) => A7 & A10 Engine => Topic started by: coater87 on 01.07. 2017 15:08
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I have never run into a "lock washer" that looks like this... *conf*
How do you use this thing? It has some tabs that fit into a spline, that I understand. But the dished part? Not so much....
And what is the hole for?
To me a lock washer locks a nut or bolt down to keep it from backing off by bending tabs onto the flats.
Am I suppose to just beat the tar out of this thing to get it around the flats? Am I suppose to notch tabs into it? Is the hole for safety wire?????
Should I just toss it out and use a real lock washer...whats the deal with this thing? *conf*
Oh, and a picture of the bike.
Lee
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It is the usual A10 gearbox sprocket nut lock washer.
Orignally for the circular nut which fits in the dish.
Just bend it over a couple of the flats on the SRM nut.
The nuts do tend to slacken off in use. I use a bit of thread locker as well.
As for the hole? Dont know.
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Thanks Julian,
First time I have ever seen a 'lock washer" that locks nothing. You would almost think its a KIA automotive part. *smile*
I will beat the sass out of it so it actually locks.
Lee
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The tabs on the inside of the washer fit into the splines on the sleeve gear which are for fitting the sprocket. Bend over a couple of the edges of the washer and it locks sprocket to the SRM nut.
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First time I have ever seen a 'lock washer" that locks nothing. You would almost think its a KIA automotive part. *smile*
Not quite the case... as Julian pointed out, it's for the original round nuts that have four 'cutouts/notches' (there's a name for 'em I'm sure) for a tube type socket-spanner, and the washer is knurled/peined up into those- and the internal bits go into the splines
Dunno about the hole either
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hi guys, details from Manual if that helps don't use that washer myself but I guess when the nut is tightened it deforms the tabs when it hits the end of the splines, anyway see if you can work it out,cheers
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It's the same washer as the final drive sprocket right?
Because somehow I have 2 of those KIA washers. Neither looks very effective. ;)
Lee
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Hi Lee,
It's the same washer as the final drive sprocket right?
No, its different' You probably ordered a set of lock washers and then the SRM nut that comes with its own washer *????*
I just use thread locking fluid on the crank nut, the original washer is a *** poor effort *eek*
John
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I do use that washer but I honestly dont know how effective it is I know its a damned pain to fit
I have always hoped that locktite and 65 pounds on the torque wrench will keep the damned nut tight anyway