1972 combat gearbox removal request

BERT

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I got near berated for it but simply machined the bits to make that job easy with no stress to the gearbox.
Torqueing the nut to the 70 ft/lbs was almost Zen like. (Maybe 'Magic carpet ride was playing at the time )

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A locking split collar that fit over the rotor using the same sprocket holding tool became part of the rotor holding tool that made that 70 ft/lbs easy also.

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Just to make it a little more over the top the M6 locking cap screw turned CCW opens the collar when it hits the small grubscrew for easy fitment then CW to lock the collar.

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Said many times but I will never forget the struggles to do the most simple job (without a bodge or risking breaking something) way back in the beginning. (mid/late 1970's)
Nothing is to much trouble these days having the machine tools to do so.

That bike is coming along nicely to live on for another 40 years.
That is one very nice tool. Thank you for posting this. I have discovered that there are a few seemingly simple procedures that become a challenge and making a tool to make the task easier is always well worth the effort.
 

Time Warp

.......back to the 70's.
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That is one very nice tool. Thank you for posting this. I have discovered that there are a few seemingly simple procedures that become a challenge and making a tool to make the task easier is always well worth the effort.

I would imagine a simple version could be done with a piece of flat bar with a length of old drive chain welded to the top and bottom long enough that it would fold over itself (The Boilermaker version) as RoadScolar mentioned.

 

grandpaul

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I simply wrap an old chain or piece of chain (whichever I find first) around the sprocket, clamp it with a set of vice-grip pliers, and commence doing up, or undoing, the sprocket retaining nut.
 

gortnipper

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We use chain whips for removing bicycle sprockets

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