In the past, we always talked about the oil type, so how to choose among the many hydraulic oil types? Liugong excavator parts editor today teaches us how to use it.

    1. Classification of hydraulic oil types

The use of hydraulic oil is very wide, it is the most used product in industrial oil. Regarding automobile and construction machinery, excavator parts and other hydraulic systems, hydraulic oil is required as a medium for transmission operations. The quality of hydraulic oil will greatly affect the reliability of the hydraulic system and the service life of the equipment.

There are three types of hydraulic oil for excavator parts: HL type, HM type and HG type.

(1) The HG type has anti-rust and anti-oxidation functions, and is added with a viscosity index improver, which has good viscosity-temperature characteristics. This type of hydraulic oil was originally 32G and 68G in general hydraulic oils, also known as hydraulic rail oil.

(2) HM type has series of alkaline high zinc, alkaline low zinc, neutral high zinc type and ashless type, etc. According to the kinematic viscosity at 40 degrees Celsius, it is divided into four trademarks: 22, 32, 46, and 68.

(3) HL type hydraulic oil is made of refined medium base oil with relatively high depth and anti-oxidation and anti-rust additives. According to the kinematic viscosity at 40 degrees Celsius, it can be divided into six brands of 15, 22, 32, 46, 68, and 100.

   2. Use of hydraulic oil type

Different types of hydraulic oil have different uses.

(1) HG hydraulic oil has good anti-rust, anti-oxidation, anti-wear and anti-stick-slip properties, so it is mainly suitable for the smooth system of machine tool hydraulics and guide rails.

(2) HM hydraulic oil is mainly used in the hydraulic system of heavy-duty, medium-pressure and high-pressure excavator parts vane pumps, plunger pumps and gear pumps. In addition, this type of hydraulic oil is also suitable for medium pressure and high pressure engineering equipment and vehicle hydraulic systems.

(3) HL hydraulic oil is used for the smoothing effect of bearing housings and low-pressure circulation systems of various machine tools with no special requirements for smooth oil and the ambient temperature is above zero degrees Celsius. Such products generally have very good sealing adaptability, and the maximum operating temperature can reach 80 degrees Celsius.

3. Here comes the main point, how to choose the type of hydraulic oil?

In fact, Liugong excavator accessories thinks: it is easy to know the above two points. In the selection, the type of hydraulic oil must be selected according to the operating environment and operating conditions. When selecting hydraulic oil, it must be summarized from the operating pressure, temperature, environment, hydraulic system, the structure and raw materials of the excavator accessories, and economy, etc. consider. In the case of relatively high working pressure, the requirements on the smoothness and anti-wear properties of the hydraulic oil are relatively high, and HL or HM type hydraulic oil can be selected.

The above is the editor of Liugong excavator parts that Kunshan Chuanna Hydraulic Parts Co., Ltd. has cleaned up for everyone to teach you how to choose the type of hydraulic oil. If you want to buy Liugong excavator parts, please call or consult online!