Fits a 312 excavator SN: 6gk00001 and up, 311 TRACK-TYPE EXCAVATOR 9LJ00001-UP, 312C & 312C L Excavators CBA00001-01200, 311C U Excavator CKE00001-UP, 312C & 312C L Excavators FDS00001-00300, 314C CR & 314C LCR Excavators KJA00001-UP, 311C U Excavator PAD00001-UP, 314C CR & 314C LCR Excavators PCA00001-UP, 314C CR Excavator SNY00001-UP.