Machine description: ENCLOSED TRAILER MOUNTED 545KW/681KVA SR4 GENSET, 3 PHASE, 480 VOLTS, 819 AMPS, FUEL TANK, CATERPILLAR 3412 ENGINE (GENERATOR REBUILT IN 2023 & NEW ENGINE INSTALLED BY CATERPILLAR IN 2010)... more info about the 1991 Caterpillar SR4.