D4 7U 5 Roller Frame

Just check the trackframe set up on the Loader .They usualy have a riidged Frame ,So may not adapt to your Dozer .

Several year ago I found a pair of 5 roller frames and tracks from a newer 7U and replaced the 4 roller frames and tracks that were on my current D4. The newer critter had the spring instead of the rigid bar so all parts were compatible.

Other than everything being heavy and a bit awkward, the swap went nicely. It made the D4 much more easy to doze with, no more whoop de does. The only drawback is it's a tad harder to turn with more track on the ground.

I don't know if this is a ridgid bar tractor or not. He has a full machine shop so I think he could use his old spring and just copy features off of his 4 roller frame and duplicate them onto the 5 roller frame if needed. Thanks for the input. Nice to know someone tried it and feels it is an improvement.

I believe McMike from Bakersfield did a four roller to five roller conversion on his "Mighty D4".

See it at his Playday tomorrow in West Bakersfield.

Daron

isn't the track frame longer? actually requiring a 5 roller frame to rebuild? good luck.

Yes.

Daron

I read through some older posts and it sounds like the 5 roller frames that have the rigid bar have shorter gusset bracing on the inside of the swing frames. It also sounds like the front idlers have heavier bearings and the actual roller frames are box section rather than two C-channels.
Still adaptable but it will take some extra work it sounds like.

May I make a suggestion? Maybe just cut off the front of the loaders track frame with one roller and the large idler and the heavy duty bearing ( probably heavy duty because the loader carried heavy loads ) do some careful measuring and use straight edge to keep things in alignment. Trim the inside boxing plate back from the joining weld and make a new boxing plate that would span your welded area. I'll bet if your welding and alignment is right it would take a beating. Also here are the track frames both ridged and osolating for the 5 roller arrangement. I also included both large idlers, the loaders and the osolating. I got the pics out of D47U 27570 to 7U 44307 parts book. At least you have that 7U loader to hack on. Hope this is some help. Charlie