[GreenKeys] Odd Model 15 gears

[Sam Hallas]

Sheldon Daitch wrote:
>  Way back, maybe the early 1970s, the AP increased the operating speed
>  of the M-15 and M-20 machines.
>
>  One of our forum members posted an AP document detailing the
>  step-by-step instructions so the subcribers could change the
>  mainshaft and motor gears hopefully without the assistance of the AP
>  techs.

Jim Haynes posted the document and I've tidied it up to reduce the file 
size. It's on my site at:
<http://www.samhallas.co.uk/repository/telegraph/ap_m15_m20_gearchange.pdf>

Sam