Fujian Southchina Heavy Machinery Manufacture Co.,Ltd

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Website: www.socma-forklift.com

50 Tons 50t Heavy Forklift FD500

50 Tons 50t Heavy Forklift FD500

HNF-500 Rated load: 50,000 kgs Load center:1200 mm Operating weight: 60,000 kgs Wheel base: 6,000 mm Email: claire@socmachinery.com

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    Email: claire@socmachinery.com


    50 tons 50t heavy forklift FD500 brand SOCMA vs Kalmar, Hyster, Konecranes, Sany, TCM, CVS 

    For mechanized construction enterprises, whether the technology condition of construction machinery is good or not is a direct factor for the normal production of enterprises. For the hydraulic transmission engineering machinery, the normal operation of the hydraulic system is a main sign of its good technical condition. Qualified hydraulic oil is the guarantee for reliable operation of the hydraulic system, and proper maintenance is the basis for reliable operation of the hydraulic system. For this reason, I make a rough discussion on the maintenance of hydraulic system of construction machinery in general working environment according to the work practice.


    1 select the suitable hydraulic oil


    Hydraulic oil plays the role of transmitting pressure, lubrication, cooling and sealing in the hydraulic system. The improper selection of hydraulic oil is the main reason for the early failure of the hydraulic system and the decline of the durability. Hydraulic oil should be selected according to the number of the random "instructions". When special oil is used in special case, the performance of the oil should be the same as that of the original brand. Different grades of hydraulic oil can not be mixed to prevent chemical reactions and performance changes of hydraulic fluids.



    Maintenance methods and measures for hydraulic systems of common construction machinery


    Dark brown, milky white, and odorous hydraulic oil is a metamorphic oil that can not be used.


    50 tons 50t heavy forklift FD500 brand SOCMA vs Kalmar, Hyster, Konecranes, Sany, TCM, CVS 


    2 prevent solid impurity into hydraulic system


    The 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 cracks. If the solid impurity invasion will cause the precision parts to be pulled, hairpin and oil passage blockage, it will endanger the safe operation of the hydraulic system. General solid impurities into the hydraulic system through: hydraulic oil dirty; dirty refueling tools; refueling and maintenance, careless maintenance; hydraulic components, such as chip removal. The solid impurity invasion system can be prevented from the following aspects:


    2.1 refueling time


    The hydraulic oil must be filtered and filled, and the refueling tools should be reliable and clean. It is not possible to remove the filter at the fuel tank outlet in order to improve the speed of refueling. Refueling personnel should use clean gloves and work clothes to prevent solid impurities and fiber impurities from falling into the oil.


    50 tons 50t heavy forklift FD500 brand SOCMA vs Kalmar, Hyster, Konecranes, Sany, TCM, CVS 


    2.2 maintenance


    Disassemble the refueling cover of the hydraulic oil tank, the cover of the filter, the testing hole, the hydraulic tubing and so on. It is necessary to avoid the dust when the system oil channel is exposed, and the disassembly part should be thoroughly cleaned before it can be opened. If the oil tank is dismantled, the soil around the tank cover is removed, the cover of the oil tank is loosened, the residue remaining in the joint is cleared (and the water can not be rinsed into the tank), and the oil tank cover can be opened after cleaning. When wiping materials and hammers are needed, wiping materials that do not remove fiber impurities and special hammers with rubber attached to the hitting surface should be selected. Hydraulic components and hydraulic hoses should be carefully washed and assembled after high pressure air drying. It is necessary to select the intact filter cartridge (damaged in the inner packing), even though the filter core is intact, it may be unclean. While cleaning the filter while changing the oil, wipe the material before installing the filter element and carefully clean the bottom dirt in the filter shell.


    2.3 cleaning of hydraulic system


    Cleaning oil must use the same brand of hydraulic oil as the system, the oil temperature is between 45 80 C, with a large flow as far as possible to remove impurities from the system. The hydraulic system should be cleaned more than three times. After each cleaning, it will be discharged from the system when the oil is hot. After cleaning, clean the filter, replace the new filter element and add the new oil.


    50 tons 50t heavy forklift FD500 brand SOCMA vs Kalmar, Hyster, Konecranes, Sany, TCM, CVS 


    3 prevent air and water intrusion hydraulic system


    3.1 air intrusion prevention hydraulic system


    In the normal pressure and normal temperature, the hydraulic oil contains 6 to 8% of the air. When the pressure is reduced, the gas will come out from the oil, and the bubbles break up to make the hydraulic element "cavitation" and produce noise. A large amount of air entering oil will aggravate the phenomenon of "cavitation", the compressibility of hydraulic oil increases, the work is unstable, the working efficiency is reduced, and the execution of the work "crawling" and so on. In addition, the air will also oxidize the hydraulic oil and accelerate the deterioration of the oil. To prevent air invasion, the following points should be paid attention to:


    1, after repair and oil change, it is necessary to exclude the air in the system according to the random instruction manual, so that it can operate normally.



    50 tons 50t heavy forklift FD500 brand SOCMA vs Kalmar, Hyster, Konecranes, Sany, TCM, CVS 


    2, the oil suction pipe mouth of the hydraulic oil pump must not expose the oil surface, and the oil suction pipeline must be well sealed.


    3, oil pump driving shaft seal should be good, should pay attention to replace the oil seal should use "double lip" positive oil seal, can not use "single lip" oil seal instead, because the "single lip" oil seal can only seal one one oil, do not have the function of sealing gas. After a heavy repair of the ZL50 loader in this unit, the hydraulic oil pump has continuous "cavitation" noise, and the oil tank oil level rises automatically. After inquiring the repair process of the hydraulic oil pump, it is found that the oil seal of the hydraulic oil pump drive shaft is misused as the "single lip" oil seal.


    3.2 water intrusion prevention hydraulic system


    Excessive moisture in oil will cause corrosion of hydraulic components, oil emulsion deterioration, lubricant film strength reduction, and accelerate mechanical wear.


    In addition to maintenance and maintenance to prevent water invasion, but also to pay attention to the oil storage bucket should not be used, tighten the lid, the best inverted placement; the oil with large amount of water should be filtered many times, each filter once replaced by a drying filter paper, in the absence of special instrument testing, the oil can be dripped to the hot iron plate, no steam emerge side by side. That is, the burning side can be added to the injection.


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