Cat D4
Home Up Caterpillar 30 Cat D4 HT-4 Teardown HT-4 Assembly Cats Moving Dirt Cat D318 Power Unit Crawler Links

DCP00374.JPG (311895 bytes)We had to remove the tracks on the D4 because we had several track links lock up on us.  Actually 7 of them.
DCP00373.JPG (244385 bytes)DCP00376.JPG (274879 bytes)We took the tracks to a track shop to have them pressed apart, but their 200 ton press couldn't move the stuck pins.  They even broke the press pin they were using.  We ended up cutting the tracks apart with the oxy-acetylene torch and replace the pins and bushings in the stuck links.
DCP00379.JPG (256468 bytes)A lot of cutting, heating, pounding with a big hammer and sweat has the tracks fixed.  We have one of the tracks back on the undercarriage.
DCP00382.JPG (275312 bytes)DCP00383.JPG (292829 bytes)And Dad is driving in the master pin on the other side. My brother is tightening the track.