Like any other type of crane, a truck crane requires proper maintenance to ensure optimal performance. The general requirement for the operation and maintenance of truck cranes is to implement concrete, effective measures and strictly adhere to all established maintenance protocols-including daily, periodic, and seasonal maintenance, as well as break-in procedures for new equipment. Maintenance should support operational needs, with necessary repairs performed as circumstances dictate. Beyond routine upkeep, it is essential to balance technical maintenance with construction schedules during busy periods; integrating maintenance into daily operations helps ensure that timely and effective care ultimately enhances operational efficiency.
3. Challenges and Requirements for the Operation and Maintenance of Truck Cranes Under Special Conditions
Challenges and Requirements for Operating Truck Cranes in Extremely Cold Conditions
(1) Key challenges in operating truck cranes in extremely cold conditions: In freezing temperatures, fuel evaporation is hindered, and engine heat loss increases. The viscosity of lubricants and greases in transmission mechanisms and undercarriage components rises, tire-to-ground adhesion deteriorates, and battery performance declines. These factors collectively lead to difficulties in starting the engine, accelerated wear of mechanical components, higher fuel consumption, and reduced safety.
(2) General technical requirements for the operation and maintenance of truck cranes in extremely cold conditions:
① Maintain the engine at an appropriate operating temperature.
② Switch to winter-grade lubricants and greases.
③ Increase the generator charging current and adjust the density of the battery electrolyte.
④ Enhance the operation and maintenance of the hydraulic system.
⑤ Prevent the cooling system from freezing during winter operations by draining the coolant or adding antifreeze.
⑥ In winter, the fuel level in the carburetor float chamber may be slightly raised to ensure the air-fuel mixture is suitable for low-temperature operation. To facilitate cold starts, the dwell angle (contact closure angle) of electrical points should be increased, and the contact gap adjusted to strengthen the spark. ⑦ The engine must be preheated before starting. Preheating reduces the rotational resistance of the crankshaft, improves the atomization and evaporation of fuel during a cold start-thereby facilitating the formation of an optimal air-fuel mixture-and helps maintain sufficient battery capacity and terminal voltage to ensure a successful start.
⑧ When operating a diesel engine in winter, use diesel fuel with a pour point 3–5°C lower than the lowest expected seasonal temperature; this ensures the fuel will not solidify and hinder engine operation during periods of extreme cold.
