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Lubricant filling methods include manual filling and centralized pump filling. Smearing or filling, grease gun filling, grease cup filling, etc. are all manual filling. When using grease on automobiles, manual filling is used. For example, wheel hub bearings are filled manually, leaf springs are manually applied, leaf spring pins (with grease nozzles) are filled with grease guns, and distributor drive shafts are filled with grease cups. For parts that use manual filling, the consistency of the grease should be mainly considered when choosing grease. Generally, grease with a consistency of No. 1-3 is selected, and grease with a consistency of No. 2 is best. It is easier to refill and has a longer life. Some lubrication equipment adopts a centralized filling method. The movable joints of the nose and tail elevators of the submarine are outside the warehouse. When the submarine is launched into the water, grease cannot be added to these parts. Therefore, grease is regularly and quantitatively supplied from the warehouse through pipes to these parts for lubrication. In industry, centralized grease filling is more common, such as conveyor roller bearings in steel plants. Because the rollers are arranged over a long distance and in large quantities, centralized grease filling is more convenient. Centralized filling and lubrication requires a long pipeline. In order to facilitate filling and avoid excessive pump pressure, the consistency of grease is generally No. 1-0. It is best to use grease with No. 0 consistency. Considering the lubrication consistency, general sealing grease, such as the sealing grease of the valve stem, adopts the consistency of No. 4-5. ； For high-speed or ultra-high-speed parts, consistency No. 3 to No. 2 should be used. ； Generally, the consistency of No. 2-1 is generally used. ； Centralized filling of grease adopts consistency No. 1-0 ； The grease used for the gears of the reduction box adopts the consistency of No. 00-000.