What hydraulic oil does Sany excavator use? Comprehensive analysis and purchasing guide
In the field of engineering machinery, the stability of hydraulic systems directly affects the performance and service life of the equipment. As a leading brand in the domestic excavator industry, Sany Excavator's hydraulic oil selection has attracted much attention. This article will combine popular topics and user discussions across the network for the past 10 days to answer the selection standards, recommended models and precautions for Sany Excavator hydraulic oil.
1. Official recommendation standards for hydraulic oil of Sany excavator
| Equipment model | Hydraulic oil type | Viscosity grade | Replacement cycle |
|---|---|---|---|
| SY60C/SY75C | HM anti-wear hydraulic oil | 46# | 2000 hours |
| SY135/SY155 | HV low temperature hydraulic oil | 46#/68# | 2000 hours |
| SY365/SY750 | High pressure hydraulic oil | 68# | 1000 hours |
2. Comparison of performance of mainstream hydraulic oil brands in the market
| brand | Product Series | Applicable temperature | Price range (yuan/liter) | User rating (5-point scale) |
|---|---|---|---|---|
| Great Wall | Zhuoli HM series | -30℃~80℃ | 35-45 | 4.7 |
| Kunlun | Tianhong HV series | -40℃~100℃ | 40-50 | 4.6 |
| Shell | Delix H series | -25℃~90℃ | 50-65 | 4.8 |
| Mobil | DTE series | -20℃~110℃ | 60-75 | 4.5 |
3. Analysis of key indicators for hydraulic oil selection
1.Viscosity grade: Sany Excavator generally recommends 46# or 68# hydraulic oil, and the specific choice must be based on the working environment temperature. It is recommended to use low-temperature HV oil products in the north in winter.
2.Anti-wear properties: The hydraulic system pressure can reach more than 35MPa, and the HM (high pressure anti-wear) grade oil must be selected, and the zinc content must be >0.03%.
3.Cleanliness standards: The NAS cleanliness level should reach below 8 levels, and the ISO standard must meet the requirements of 4406/20/17.
4.Antioxidant: The TAN value (total acid value) change rate of high-quality hydraulic oil should be <0.3mgKOH/g/1000h.
4. User FAQs
Q1: Can different brands of hydraulic oil be mixed?
A: In principle, mixed use is prohibited. Different formulation additives may produce chemical reactions, resulting in the formation of sludge. If you need to change your brand, the hydraulic system should be thoroughly cleaned.
Q2: How to determine if hydraulic oil needs to be replaced?
A: It should be replaced immediately when the following situations occur: ① The color of the oil becomes darker and dark brown ② The viscosity changes more than ±15% ③ The moisture content is >0.1% ④ Mechanical impurities >0.05%.
Q3: How to choose hydraulic oil in high temperature environments?
A: It is recommended to use high viscosity index hydraulic oil with a viscosity index >120 (such as HV or HS type), and appropriately shorten the replacement cycle to 1500 hours.
5. Maintenance suggestions
1. The filter element should be replaced simultaneously every time the hydraulic oil is replaced, including the oil suction filter element, the oil return filter element and the pilot filter element.
2. It is recommended to change oil for the first time of new equipment to 500 hours in advance to remove metal debris generated during the run-in period.
3. When storing hydraulic oil, avoid direct sunlight, and it must be used within 6 months after opening.
4. Regularly check the oil condition, and it is recommended to conduct pollution detection every 250 hours.
Summarize: Sany Excavator recommends using HM/HV anti-wear hydraulic oil that meets GB11118.1 standards. The specific viscosity selection must be combined with the equipment model and working environment. Although the initial cost of choosing high-quality hydraulic oil is high, it can significantly reduce the maintenance frequency, extend the service life of the pump and valve, and have better overall benefits.
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