Liugong excavator parts editor teaches you how to choose hydraulic oil models

2025-03-26

We always talk about the type of hydraulic oil, so how do we choose among the many types of hydraulic oil? Liugong excavator parts editor will teach us how to use it today.

1. Classification of hydraulic oil types

Hydraulic oil has a wide range of uses and is the most widely used product in industrial oil. Regarding hydraulic systems such as automotive and construction machinery excavator parts, hydraulic oil is required as a medium for transmission operations. The quality of hydraulic oil greatly affects the reliability of hydraulic system operation and the service life of equipment.

Excavator accessories hydraulic oil types are classified into three types according to national standards: HL type, HM type, and HG type.

(1) HG type has anti rust and anti-oxidation functions, and has added viscosity index improver, which has good viscosity temperature characteristics. This type of hydraulic oil used to be 32G and 68G in general hydraulic oil, also known as hydraulic rail oil.

(2) HM types include alkaline high zinc, alkaline low zinc, neutral high zinc, and ash free series, and are classified into four trademarks based on their 40 degree Celsius kinematic viscosity: 22, 32, 46, and 68.

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

2. Types and uses of hydraulic oil

The use of hydraulic oil varies depending on the type.

(1) HG hydraulic oil is primarily suitable for smooth systems used in machine tool hydraulics and guide rails due to its excellent anti rust, anti-oxidation, anti-wear, and anti slip properties.

(2) HM hydraulic oil is primarily used in the hydraulic systems of heavy-duty, medium pressure, and high-pressure excavator components such as blade pumps, plunger pumps, and gear pumps. In addition, this type of hydraulic oil is also suitable for hydraulic systems in medium and high-pressure engineering equipment as well as vehicles.

(3) The purpose of HL hydraulic oil is to achieve a smooth effect on bearing housings, low-pressure circulation systems, and other aspects of various machine tools with no special requirements for smooth oil and ambient temperatures above zero degrees Celsius. These types of products generally have excellent sealing adaptability, with a maximum operating temperature of up to 80 degrees Celsius.

3. The key point is here, how to choose the type of hydraulic oil?

In fact, Liugong excavator parts thought that knowing the above two points would make it easy. When selecting, it is necessary to choose the type of hydraulic oil based on the working environment and conditions. When selecting hydraulic oil, various factors such as working pressure, temperature, environment, hydraulic system, structure and raw materials of excavator parts, and economy should be taken into consideration. When the homework pressure is relatively high, the requirements for the smoothness and wear resistance of hydraulic oil are relatively high, and HL or HM types of hydraulic oil can be selected.

The above is the list of LiuGong excavator parts prepared by Kunshan Chuanna Hydraulic Parts Co., Ltd. The editor will teach you how to choose the type of hydraulic oil. If you want to purchase LiuGong excavator parts, please contact us by phone or consult online!

柳工挖掘机配件小编教您如何选择液压油型号-柳工挖掘机配件