Functional division and daily maintenance focus of truck crane chassis driving system and lifting operating system

A truck crane is a kind of lifting equipment that installs a lifting operation device on the chassis of a general-purpose or special-purpose truck. Its essence is the organic combination of the two functional systems of “driving” and “lifting”.A clear understanding of the functional division of these two systems and targeted implementation of daily maintenance are the basis for ensuring the safety of equipment on the road and the safety of lifting operations.The chassis driving system is mainly responsible for the rapid transfer of vehicles and the movement of the site. Its composition is similar to that of a heavy truck, including the engine, drive train (clutch, gearbox, drive shaft, drive axle), driving system (frame, axle, suspension, wheels), steering system and brake system.Its maintenance focus is to ensure the safety of road driving, such as regular inspection of engine oil and coolant; replacement of gearbox and drive axle gear oil on time; inspection and adjustment of brake clearance and brake fluid level; check tire pressure, wear and bolt fastening torque; check the clearance and lubrication of each ball head of the steering mechanism.

The lifting operating system is an independent loading part, including a rotary mechanism, a lifting mechanism, a luffing mechanism, a telescopic mechanism, an outrigger mechanism, and a hydraulic system and an electronic control system.The core of its maintenance is to ensure the safety and reliability of lifting operations.The hydraulic system is the core of power. It is necessary to regularly check the oil level and oil quality of the hydraulic fuel tank, clean or replace the filter element, and check all pipelines and joints for leakage.The wire rope on the lifting hoist is the "lifeline”, and its broken wire, wear, flattening, knotting, and corrosion must be checked daily, and lubricated in accordance with regulations.The hook, its anti-decoupling device, and pulley block also need to be inspected.Safety devices such as torque limiters, height limiters, and amplitude indicators must regularly verify their sensitivity and accuracy.

Daily maintenance should run through before and after each departure.Before leaving the car, the driver should conduct a comprehensive visual inspection of the chassis and the car to confirm that there is no oil leakage or water leakage, the tires are normal, and the components are intact.Before lifting operations, it is necessary to check whether the outrigger movement is normal and whether the power take-off device can be switched smoothly.After receiving the car, cleaning and supplementary inspections should be carried out, and problems found should be recorded and reported for repair in time.The establishment of a responsibility system of “who uses and who maintains”, the compilation of the maintenance points of the two major systems into the operation manual and maintenance plan, and strict implementation, is an effective management practice to keep truck cranes in good technical condition, extend service life, and ensure the dual safety of driving and operation.