Construction machinery oil refers to the special lubricating oil specially used for large-scale mechanical equipment such as large excavators, loaders, hoists, forklifts, cranes, concrete mixers and rollers. It mainly includes four categories and more than ten varieties, including diesel supercharged engine oil for construction machinery, anti-wear hydraulic oil for construction machinery, heavy-duty gear oil and hydraulic transmission oil. This article will introduce how to choose heavy-duty gear oil. Different brands of construction machinery have different requirements for this. Therefore, this article is for reference only.
The gear transmission device of construction machinery mainly includes transmission device, steering gear, gear box of front and rear drive axle, needle roller bearing of universal joint and other mechanical parts. Among them, the importance of transmission in power system is second only to engine. Among them, the stepped transmission is the most widely used. It adopts gear transmission and has several fixed transmission ratios.
In order to make the transmission work stably and effectively for a long time, proper heavy-duty gear oil must be added to reduce the friction and wear of the gear, transmit the heat generated by the friction surface, and prevent corrosion and rust. The performance characteristics of gear oil mainly lie in its small kinematic viscosity, excellent extreme pressure and wear resistance, good low temperature performance, excellent viscosity temperature performance, energy saving and environmental protection performance. General equipment can choose GL-5 level. The viscosity grade can be 80w-90, 85w-90, 85w-140 according to the load and ambient temperature.
