Shantui, gearbox Komatsu bulldozer etc. why is oil instead of the gearbox? And hydraulic systems and transmission systems. Why don't you use hydraulic oil and oil?
Let me answer you. I used to sell roller and Komatsu fittings. I started lubricating oil ten years ago, so I know something about it.Shantui bulldozer is the gearbox and gear in addition to hydraulic structure, if the direct use of the gear oil viscosity is relatively large, the hydraulic system which is not too ideal, but there are few domestic and gear oil instead of the corresponding, according to the actual situation, for the 15W-40 engine oil viscosity and pour point is more suitable than the freezing point (i.e. 3 C) is -25 DEG C, to meet and adapt to most of the region's climate, furthermore, engine oil is a comprehensive index of relatively strong, for the protection of the metal and rubber parts can be achieved, so we can replace the gearbox oil! But in the strict sense, there is still a difference, only a replacement.
So the hydraulic oil and transmission oil viscosity is relatively close, and has properties of hydraulic transmission, so the convenience, with the same kind of oil, as long as solving the compressive and wear even meet the basic, and is close to the engine in 30 or 10W-30 5W-30, the oil viscosity at 100 DEG C at about 10, with this oil instead of the viscosity, although slightly larger, but the domestic components will inevitably lead to pressure relief, add a bit of viscosity just make up for this shortcoming, it did.The application of the above habits prevalent in the the Yellow River basin, because of the oil in the winter to keep solidification suitable to the climate here, if in the northeast region is not feasible, so we can only say that the phenomenon of in parts of such use, does not represent all, if in the northeast cold area construction, must pay attention to this point.
As for the hydraulic system and transmission system should be the use of hydraulic oil and hydraulic transmission oil, because the 46# hydraulic oil viscosity at 40 DEG C is about 46, about 8 viscosity at 100 DEG C, transmission oil strictly should use 6#, viscosity at 100 DEG C is 6, but the transmission oil everyone used to use 8#, which because 8# pour point is relatively low, can meet the vast area.
