Maintenance guide for hydraulic system of the hott

2022-08-09
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Maintenance guide for hydraulic system of small cranes

the hydraulic system is the key component of cranes (cranes, small cranes, small cranes). The maintenance of the hydraulic system is related to the performance and service life of the crane. The crane is powered by hydraulic pressure and equipped with various hydraulic devices. Therefore, it is estimated that greenhouse gas emissions of more than 350 million tons of carbon dioxide equivalent can be reduced by 2025. If the operation and maintenance rules are not truly observed, hanging or removing the corresponding pendulum thallium on the pendulum rod will not only make full use of its due performance, but also shorten the service life of the parts. Therefore, the following items must be observed during operation

1. Before operation, the liquid level window of the oil tank should determine whether the hydraulic oil is fully added according to the regulations. If it is lower than the specification, it can also be used for the stacking test with the required constant pressure. If it is below the marking line, it must be supplemented. When refuelling, be sure to inject it through the refuelling filter, and pay great attention not to mix impure characteristics such as oil or water of different brands

2. The filter element of the oil filter should be checked after 250h of operation, and cleaned or replaced if necessary

3. Various valves of the hydraulic system have been fully tested before leaving the factory, and the pressure and flow have been adjusted. Do not touch them casually

4. Dirt should not be attached to all kinds of machine parts, especially the devices of the hydraulic system. After the operation, the dust and oil stain must be removed

5. The hydraulic oil tank should remove water and impurities from the bottom oil drain every half a month, and replace all hydraulic oil every other year (or work for 2000h) (if the oil does not deteriorate, the oil change cycle can be extended appropriately). When the crane operates in a particularly harsh environment, the oil replacement cycle should be shortened accordingly

6. After long-term operation, hydraulic oil will produce some condensate and sediment, which should be discharged regularly once a month. Drain the condensed water one night after the roller stops working, unscrew the oil drain plug at the bottom of the oil tank, and let the dirty oil flow out until the clean oil is seen. Then install the oil drain plug and fill with fresh hydraulic oil

7. No matter how long the working time is, the hydraulic oil should be updated at least once a year to prevent the oil from deteriorating and polluting the hydraulic system. Before changing the oil, start the engine and warm the hydraulic oil to facilitate drainage

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