4 replies to this topic

[furse]

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?

[dabber]

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)!

[Monty_Jon]

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 by Monty_Jon, 27 January 2012 - 09:06 PM.

[furse]

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? ?

[Lee Harris]

second gear i fink?