Thats got to be a typo in the D337 & torque converter conversion specs where they refer to a No. 20 scraper. I'm thinking that's a No. 80 (2D) model.

Hi Guyz

Eye've been lurkin in the back ground
Gone R the days of loggn in to any 4M n stay n logd in 4 ever
so me is often lurk n in the back ground az many do
LOL
4 memory Cable Cat supplied the info on a few pages n eye condensed into one page
cya
§wishy
HasBeen

Why were the original engines swaped out

Hi Old Dozer 3T,
welcome to the BB.
The Original engines were replaced with an engine of higher horse power and RPM's for scraper push machines. The extra ground speed allowed faster load cycle times-hence more production.
Scan below may help.
Cheers,
Eddie B.

Why does it have such a little narrow blade on the front while having so much more power??

That's just a pusher blade.

lol I knew, just being a wise%$# or maybe a Dumb%$# lol

Arent they all pusher blades? lol there I go again.

Actually, you're both missing the main reason for developing these. This was back in the heat of the cold war, and we were furiously working to expand our nuclear weapons capabilities. These tractors were developed to work in the uranium mines, where the very heavy ore needed to be pushed up. Even with their extra weight and horsepower, the ore was so dense that that small blade was all that the horsepower could push.

Pete.

Becoming better known as the B.S. blade.