New Cat Adventure

They came out in 1943 according to the Cat SNID book and the 6U & 7U D4s came out in 1947 so likely it,s in the 46 year guessing or in between that time as my Cat SNID book only shows starting production.If the traxcavator is a 1952 then it would be a 7U serial number. I would think the traxcavator tracks would be longer.

The HT4 Traxcavator uses a 5 roller track frame so you would need a few more links. I have seen Traxcavators with grouser pads on them. I believe the rollers are a different style but I am guessing that they could be fitted.

Tom

I show 5T6303 as early 1947.
Along with the 5-roller frame they also used the large diameter front idler.
37 link chain is used (31 for standard tractor)
Grouser shoes can be used but they are pretty aggressive with all the maneuvering you normally do with a loader......but almost a requirement if pushing on slippery ground.
Except for the standard flat shoes everything else is standard tractor undercarriage.

Glad to see your back to the "yellow iron"😊 😊

Hello,
I just changed my d-4 7u from a 5 roller to an older ,but better 4 roller bottom. Had to change frames and all but it all fits. With a loader you would be better off the 5 roller carriage. My book shows 1 extra double flange roller to make it five. All other parts interchanged for me.