How to choose lubricating grease for reducer maintenance

When selecting grease according to the bearing load of traveling reducer, the grease with small penetration shall be selected for heavy load. When working under high pressure, in addition to small penetration, it also has high oil film strength and extreme pressure function. When selecting grease according to the environmental premise, calcium based grease is not easy to dissolve in water and is suitable for dry and less moisture environment. When selecting lubricating grease according to the working temperature, the main indicators shall be drip point, oxidation stability and low-temperature function. The drip point can generally be used to evaluate the high-temperature function, and the actual working temperature of the bearing shall be 10-20 ℃ lower than the drip point. The service temperature of synthetic grease shall be 20-30 ℃ lower than the dropping point.
Different lubricating oils shall not be mixed with each other. The positions of oil level plug, oil drain plug and breather are determined by the installation position.
Oil level check:
1. Cut off the power supply to prevent electric shock. Wait for the reducer to cool down;
2. Remove the oil level plug and check whether the oil is full;
3. Install the oil level plug.
Oil inspection:
1. Cut off the power supply to prevent electric shock. Wait for the reducer to cool down;
2. Open the oil drain plug and take an oil sample;
3. Check the viscosity index of the oil: if the oil is obviously turbid, it is recommended to replace it as soon as possible;
4. For reducer with oil level plug: check whether the oil level is qualified; Install the oil level plug.
Oil replacement:
After cooling, the viscosity of the oil increases and it is difficult to drain the oil. The reducer should change the oil at the operating temperature.
1. Cut off the power supply to prevent electric shock. Wait until the reducer cools down and there is no danger of combustion;
Note: the reducer shall remain warm during oil change;
2. Place an oil pan under the oil drain plug;
3. Open the oil level plug, breather and drain plug;
4. Drain all oil;
5. Install the oil drain plug;
6. Inject new oil of the same brand;
7. The oil quantity shall be consistent with the installation position;
8. Check the oil level at the oil level plug;
9. Tighten the oil level plug and breather.