Work principles of travel, braking, steering, lifting and swinging of mast, hoisting and cooling hydraulic circuits are all illustrated.
给出了行走、制动、转向、门架升降与摇摆、吊具，以及冷却液压回路的工作原理图。
2
Failures which can be solved by minor adjustment on brake pump, wheel, steering hydraulic cylinder, and micro-valve, connect level, mast roller, steering axle, etc. are excluded.