This was a 75,000 lb machine with a 38' boom. Only two were built and I actually owned this machine shown. It was an odd size
for a log loader at the time, but later these '290' size log loaders became incredibly popular in the forest industries.
These Thunderbird 836 Machines were built around the Koehring 6630 platform as Ross was a Koehring Dealer
and was trying very hard to break into the hydraulic log loader market during those years.