hillary Posted November 28, 2004 Report Share Posted November 28, 2004 Can anybody help with a steel replacement rear brake pedal for a Cota 315. fed up with breaking the cast alloy ones which are very difficult to straighten. Quote Link to comment Share on other sites More sharing options...
charliechitlins Posted November 28, 2004 Report Share Posted November 28, 2004 If you anneal it, you can straighten it. Method 1--rub with white soap (like Ivory), heat until soap turns black, dunk in water. Method 2--turn on acetylene only, light torch, cover part with ash, turn on oxygen and heat until ash flakes off---dunk in water. If the pedal is actually breaking, you can do this to a new pedal and it will bend rather than break...and put less stress on the shaft in the process. Quote Link to comment Share on other sites More sharing options...
nigel dabster Posted November 29, 2004 Report Share Posted November 29, 2004 I didn't think annealing cast aluminium did anything much except weaken it? Quote Link to comment Share on other sites More sharing options...
subira Posted November 29, 2004 Report Share Posted November 29, 2004 Contact Adrian Lewis at http://www.lewisportusa.com They make a billet alloy one that doesn't bend and is shorter than the original - doesn't bend / lasts forever. If you're in the UK don't forget how strong the pound is at the moment. I had one on my 315 for two years, never had to worry about it Quote Link to comment Share on other sites More sharing options...
charliechitlins Posted November 29, 2004 Report Share Posted November 29, 2004 I didn't think annealing cast aluminium did anything much except weaken it? Depends on what you mean by "weaken". It makes it more malleable. If you try to straighten a bent hand lever, it will snap because it has been 'work hardened'. If you anneal it, it won't snap. Which is weaker? Quote Link to comment Share on other sites More sharing options...
nigel dabster Posted November 29, 2004 Report Share Posted November 29, 2004 I guess I'm not a mettalurgist (sp?) but guess if its softer it will bend further anyway so that to straighten it you will break it so it kinda defeats the object. Guess the way to tackle it would be to leave it alone then anneal it before straightening it? Quote Link to comment Share on other sites More sharing options...
jesster Posted November 30, 2004 Report Share Posted November 30, 2004 Annealing new lever sprobably wont hurt. If you crash hard and bend an annealed lever, your probably better off than if you break off the normalized lever. You can also have a broken lever welded, but it will "go soft" which is a bit softer than annealed aluminum. For cast alloy, you dont have to anneal it fully. To anneal properly, you have to get the metal to 800 degrees F. so even getting 600 degrees and then quenching with water will soften it a bit. The instructions charlie gave are good ones. Pretty failsafe. Quote Link to comment Share on other sites More sharing options...
charliechitlins Posted November 30, 2004 Report Share Posted November 30, 2004 I guess I'm not a mettalurgist (sp?) but guess if its softer it will bend further anyway so that to straighten it you will break it so it kinda defeats the object. Guess the way to tackle it would be to leave it alone then anneal it before straightening it? Yep. Every time it bends, it will work harden slightly, so it's best to leave it until you can anneal it. I've probably done this to the shifter on my boy's txt 80, 6 or 7 times. Quote Link to comment Share on other sites More sharing options...
ringo Posted December 1, 2004 Report Share Posted December 1, 2004 I have about 6 broken levers you can have. Lewissport lever is currently on my bike and have had no problems John McGregor also makes an excellent lever that doesn't brake either. Had that one on the last Monty. I have a brand new one I'll sell ya. ringomoto@yahoo.com I bought both and my size 14 boots prefer the Lewisport but you may like the McGregor better. Quote Link to comment Share on other sites More sharing options...
rineholio Posted December 1, 2004 Report Share Posted December 1, 2004 Write this down-What Ringo said is the absolute unvanquished truth! I've seen his box of broken pedals! Quote Link to comment Share on other sites More sharing options...
trials lad Posted December 1, 2004 Report Share Posted December 1, 2004 The foot brake pedal was on my mont for about 2 years...but at a trial the brake pedal was there in the fist half of the section and the second half it wasnt! I dont even know how it fell off as i didnt knock it againdt anything or press it down with my foot at all Quote Link to comment Share on other sites More sharing options...
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