Washers

[nickjtc]

So, all you learned Steamerphiles out there, a question.

Why would Triumph change from a trusty tab washer (left) to secure the engine sprocket, to a dome washer (right)? The parts guy at my local dealership insists that this is the correct replacement for the original.

Thoughts anyone?

[threepot]

The 'dome'probably acts like a 'spring' washer? But why change something that works ??

[Sin_Tiger]

Is the domed washer also meant to be bent up to lock it? I've seen similar on other engines where this was done to reduce manufacturing costs but instructions were still that the edge should be bent up against the nut flat and locating point.

[rf9rider]

 

[HeavyHustler]

The dome washer is fine.  My '07 S3 has one and you just bend up the sides.  Some will bend 2 sides others may only bend 1.  I am also still using the original washer on the S3.  The Tiger still has it's original as well.  Both work fine.  No need to replace.

[nickjtc]

Shows how ignorant I was. I always thought that the idea with a dome washer was to tighten it under compression and that was what held things in place. But I suppose it will be possible to mount it so that the edges can be folded over a couple of the flats of the retaining bolt; just that there is less 'meat' folded over than with the original tab washer..

[Sin_Tiger]

Not ignorance, some are like that, just depends on the material and the manufacturing method. You can usually identify the "spring" steel type By the gunmetal Blue tinge that the material characteristically has.

[nickjtc]

You can usually identify the "spring" steel type By the gunmetal Blue tinge that the material characteristically has.

That's good to know. Thanks.