Maintenance and common problems of hydraulic construction lift
platform. manufacturers produce wholesale hydraulic lifts. For mechanized construction companies, the technical status of construction machinery is a direct factor in whether the company can produce normally. As far as hydraulic transmission engineering machinery is concerned, the normal operation of the hydraulic system is a major indicator of its good technical condition. Qualified hydraulic oil is the guarantee for the reliable operation of the hydraulic system, and correct maintenance is the foundation of the reliable operation of the hydraulic system. For this reason, based on my work practice, I will make a rough discussion on the maintenance of the hydraulic system of construction machinery in the general working environment. 1. Choosing the right hydraulic oil Hydraulic oil plays the role of transmitting pressure, lubricating, cooling, and sealing in the hydraulic system. Improper selection of hydraulic oil is the main reason for the early failure of the hydraulic system and the decline in durability. The hydraulic oil should be selected according to the grade specified in the random 'Instruction Manual'. When a substitute oil is needed in special circumstances, the performance should be the same as that of the original grade. Different brands of hydraulic oil cannot be mixed to prevent chemical reactions and performance changes of the hydraulic oil. Dark brown, milky white, and odorous hydraulic oil is deteriorating oil and cannot be used. 2. Preventing solid impurities from mixing into the hydraulic system Clean hydraulic oil is the life of the hydraulic system. There are many precision parts in the hydraulic system, some have damping holes, some have gaps, etc. If solid impurities invade, it will cause strains, hairpins, blockage of oil passages, etc., and endanger the safe operation of the hydraulic system. Common ways for solid impurities to invade the hydraulic system include: dirty hydraulic oil; dirty refueling tools; careless refueling, repair and maintenance; desquamation of hydraulic components, etc. It can prevent solid impurities from invading the system from the following aspects: 3. Maintenance and cleaning of hydraulic oil A. When refueling, the hydraulic oil must be filtered and refilled, and the refueling tools should be reliable and clean. It is not possible to remove the filter at the fuel tank filler opening in order to increase the fueling speed. Fueling personnel should use clean gloves and work clothes to prevent solid impurities and fiber impurities from falling into the oil. B. Remove the hydraulic oil tank filler cap, filter cap, inspection hole, hydraulic oil pipe and other parts during maintenance. Avoid dust when the system oil passage is exposed. The disassembled parts must be thoroughly cleaned before opening. For example, when removing the hydraulic oil tank filler cap, first remove the dirt around the fuel tank cap, unscrew the fuel tank cap, remove the debris remaining in the joint (not flush with water to prevent water from seeping into the tank), and open the fuel tank cap only after confirming that it is clean. If you need to use a wiping material and a hammer, you should choose a wiping material that does not remove fiber impurities and a special hammer with rubber attached to the striking surface. The hydraulic components and hydraulic hoses should be carefully cleaned and assembled after drying with high-pressure air. Use genuine filter elements with intact packaging (the inner packaging is damaged, although the filter element is intact, it may be unclean). Clean the filter at the same time when changing the oil. Before installing the filter element, use wiping materials to carefully clean the bottom dirt in the filter housing. C. The cleaning and cleaning oil of the hydraulic system must use the same brand of hydraulic oil as the system used, and the oil temperature is between 45～80℃. Use a large flow to remove impurities from the system as much as possible. The hydraulic system should be cleaned more than three times repeatedly. After each cleaning, let it out of the system while the oil is hot. After cleaning, clean the filter, replace the new filter element, and add new oil. 4. Prevent air and water intrusion into hydraulic system A, prevent air intrusion into hydraulic system
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