English: Track Roller, Chinese: 支重轮 (Zhīzhòng lún), Russian: Опорный каток (Opornyy katok) - Location: Undercarriage, Example: Komatsu PC200 Track Roller
English: Hydraulic Pump, Chinese: 液压泵 (Yèyā bèng), Russian: Гидравлический насос (Gidravlicheskiy nasos) - Location: Hydraulic System, Example: Caterpillar CAT 320 Hydraulic Pump
English: Bucket Cylinder, Chinese: 挖斗油缸 (Wādǒu yóugāng), Russian: Ковшовый цилиндр (Kovshovyy tsilindr) - Location: Front Attachment, Example: Komatsu PC300 Bucket Cylinder
English: Engine Assembly, Chinese: 发动机总成 (Fādòngjī zǒngchéng), Russian: Сборка двигателя (Sborka dvigatelya) - Location: Engine Compartment, Example: Caterpillar CAT D7 Engine Assembly
English: Control Valve, Chinese: 分配阀 (Fēnpèifá), Russian: Распределительный клапан (Raspredelitel'nyy klapan) - Location: Hydraulic System, Example: Komatsu PC400 Control Valve
English: Sprocket, Chinese: 驱动轮 (Qūdòng lún), Russian: Ведущая звездочка (Vedushchaya zvezdochka) - Location: Undercarriage, Example: Caterpillar CAT D8 Sprocket
English: Idler, Chinese: 引导轮 (Yǐndǎo lún), Russian: Направляющее колесо (Napravlyayushcheye koleso) - Location: Undercarriage, Example: Komatsu PC220 Idler
English: Track Shoe, Chinese: 履带板 (Lǚdàibǎn), Russian: Гусеничная пластина (Gusenichnaya plastina) - Location: Undercarriage, Example: Caterpillar CAT 325 Track Shoe
English: Hydraulic Motor, Chinese: 液压马达 (Yèyā mǎdá), Russian: Гидравлический мотор (Gidravlicheskiy motor) - Location: Hydraulic System, Example: Komatsu PC350 Hydraulic Motor
English: Boom Cylinder, Chinese: 动臂油缸 (Dòngbì yóugāng), Russian: Цилиндр стрелы (Tsilindr strely) - Location: Front Attachment, Example: Caterpillar CAT 349 Boom Cylinder