521 / 3XR
Serial: 1 → 99999
93 system groups
▶AIR INLET AND EXHAUST 7
▶BASIC ENGINE 15
▶ELECTRICAL AND STARTING 10
▶ENGINE ARRANGEMENT 1
▶FRAME AND BODY 5
▶FUEL 7
▶HYDRAULIC 12
▶LUBRICATION 2
▶MACHINE ARRANGEMENT 1
▶OPERATOR STATION 11
▶SERVICE EQUIPMENT AND SUPPLIES 2