This is an N scale model of a 1960's Wagner Lumberjack Model 60. Well as close as I could get from a couple pictures of one I found on the internet. There are a lot of pictures of the 90 and other later ones that were designed and made in the 70's and onward to today. I needed something from the 60's so with a few basic measurements that were published created this with a lot of guesswork about a number of the components on the log stacker.
I'll use two for my sawmill scene. One to unload trucks and the other to unload rail cars.

These were and are huge machines capable of lifting 60,000 to 120,000 lbs depending on model. This is a 60 ton/60,000 lb model. I modeled this off of a couple distant, only one angle shots of one the Hull Oakes mill had.
I talked to the owner recently and they said the sold it and moved to a model 90 later as the 60 was too light and would pivot down to the ground with a load that was too heavy leaving the back wheels/tires off the ground. I did hollow this one out and have a bottom cover and hope to fill the cavity with weight.

There are 3 pivot points in the model allowing one to position three of the components in different positions. .025" piano wire is used at the pivots.

If the model was in a fixed location I can see away to operate the movement shown above from under the model/layout but won't pursue that at this point.

This was the first print of the model and it came out good but plan a couple minor changes to it. When those are done I'll put the print files up on my thingiverse account
( HERE ). I'll also come back and post links.
A few more images on Railwire ....
https://www.therailwire.net/forum/index.php?topic=61121.0Sumner