John Crandall here, I inherited this D4 from a fellow that intended to repair it but unable to complete.  Its a 24V direct start D330 engine with oil clutch and manual transmission, 4a dozer with 143 hydraulic controls.  Mechanical part of the tractor is excellent, engine runs good and both cylinders have reman rods/seals.  Dozer 4A with a good face/cutting edge. Repairs needed as follows:
-Track frame diagonal brace end need to be replaced
-Both idlers need to be rebushed seals replaced.
-Track rollers are %50 without any leaks
-Final drive duo cone seals need to be replaced.
-Dozer push arm trunion and ball plates replaced.
-Dozer push arm diagonal braces need welding repair, dozer face and cutting edge are ok.
Parts on hand:  New set Cat Yellowmark SALT link assemblies, full set pad bolts but no pads.
                                        Idler seals and bearings
                                        Track frame diagonal brace weld in ends
                                         Cat duo cone seals for inside and outside 
                                          Full set of Cat sprocket press tooling including pump 60 ton cylinder and remove/install tooling.
This tractor would make an excellent farm/ranch tractor.  Not sure price wise but it still has a lot of life remaining, hate to see it junked.  I can send pics on request, its located in Mapleton Utah.  The track frames have been removed for repair, tractor is on stands.  Approximate smr 8700
My phone is 385-535-1088 I try to post some pics  tomorrow  thanks   (old cat hand on this end.)

pictures really help sell machines
KING of the self-appointed armchair advisory committee .