furse Posted January 27, 2012 Report Share Posted January 27, 2012 Can anyone explain why when the dogs wear in a gearbox it jumps out of gear? I thought once it is in gear then its the position of the selector barrel thats keeps it in gear? Quote Link to comment Share on other sites More sharing options...
dabber Posted January 27, 2012 Report Share Posted January 27, 2012 Bit like when a tyre has the edge off it. They need to have a sharp edge to engage properly. My old 348 Mont used to jump out of gear a lot, but re 'edging' the dogs used to stop it. (Ash, the memories - careening backwards down a hill, helmet touching the front mudguard when the gear has jumped)! Quote Link to comment Share on other sites More sharing options...
monty_jon Posted January 27, 2012 Report Share Posted January 27, 2012 (edited) The selector only moves the gears into the correct position, the dogs drive the adjacent gear when the square edge has gone (tapered) the power pushes the dogs out Once they start to jump out, the wear rate is exponential Edited January 27, 2012 by Monty_Jon Quote Link to comment Share on other sites More sharing options...
furse Posted January 27, 2012 Author Report Share Posted January 27, 2012 Thanks for replies, I understand that bit, I think I may have described it wrong, its the indents in the gear that the dogs push into, to turn the adjacent gear that are worn, so no longer round, but oval. I supose if one gear is loose in the other and turning at different speeds then it will push out to movement, correct? ? Quote Link to comment Share on other sites More sharing options...
lee harris Posted January 27, 2012 Report Share Posted January 27, 2012 second gear i fink? Quote Link to comment Share on other sites More sharing options...
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