... PC70,PC90-5,PC100-2,PC100-3,PC100-5,PC100-6,PC120-2,PC120-3,PC120-5,PC120- komatsu main ... ass'y, thrust metal ass'y, piston, piston ring, connecting rod, intake valve ass'y, exhaust valve ass'y, service ... motor, boom cylinder, arm cylinder, bucket cylinder and so on.3) Komatsu undercarriage parts: Chassis parts, track link ass'y, ... ,relief valve,PC70,PC90-5,PC100-2,PC100-3,PC100-5,PC100-6,PC120-2,PC120 ...