521 / T4X
Serial: 1 → 99999
85 system groups
▶AIR INLET AND EXHAUST 11
▶BASIC ENGINE 18
▶COOLING 8
▶ELECTRICAL AND STARTING 16
▶ENCLOSURES, GUARDS AND BASES 1
▶ENGINE ARRANGEMENT 2
▶FUEL 11
▶GENERATORS 2
▶HYDRAULIC 1
▶LUBRICATION 7
▶OPERATOR STATION 1
▶SERVICE EQUIPMENT AND SUPPLIES 7