Peter thanks for the info. I had a little better luck searching on Mt Lyell Railway. Several looked very promising but yielded little. Martyn Blanes site had an article on the new Lempor exhaust ejector system installed in no 5 & 3 but no data on the locos - click
here if interested.
I did find out a lot more than I had anticipated. So no need to guestimate it all. But so far you're the only source of the wheel & cog data.
Following 3 sources were pretty useful:
Rail Tasmania site
http://www.railtasmania.com/loco/abt.htm
Mount Lyell Abt Railway Nomination for Engineers Australia Engineering Heritage Recognition Volume 1 - pdf
https://portal.engineersaustralia.org.au/system/files/engineering-heritage-australia/nomination-title/HRP.West%20coast%20Wilderness%20Railway.Tasmania.Nomination%20Volume%201.V7.August%202015.pdf
Facebook Tasmanian Railways site
https://www.facebook.com/1797222117184948/photos/a.1797223040518189/2067520326821791/?type=3&theater
4 separate braking systems on the loco: vacuum train brake, independent loco brake on drive wheels, counter pressure brake (Riggenbach system) on all 4 steam cylinders and manual brake that worked on the rack pinion brake drums. The latter was not included in the restoration effort and I don't think is on the current No 1,3&5 locos.
I have tank capacities, loco wt, tube data, boiler pressure and tonnage specifications per Abt loco in adhesion mode and on the 1 in 16 and 1 in 20 grade rack sections.
Note: the engineering report states they used adhesion and cog drive on the rack sections. The gradients generally were constant enough so balancing was not a problem and once set didn't need much in the way of further adjustment.
Valve gear is walschearts on both inside and outside cylinders.
Still lacking firebox/grate and cylinder data - other than 4 saturated steam, 2 outside for drive wheels and 2 inside driving the cogs, totally independent systems with separate controls.
I can probably reverse engineer the cylinders and/or scale a few photos for crank and cylinder head dia. With your boiler dimensions and the other pics I found I can probably scale something for fb/grate.
Every little bit helps - thanks all,
Bob Pearson