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Common sense of car use

    Common sense of hydraulic crane oil change

  • Author: chengli special purpose vehicle Co., Ltd
  • Source: Original
  • Release time: 9:46:29, October 11, 2019
  • News browsing popularity: second
What type of hydraulic oil is commonly used for truck mounted cranes? Change time of hydraulic oil of truck mounted crane? How to change the hydraulic oil of truck mounted crane?
The following truck crane manufacturers share some common knowledge of truck mounted crane maintenance. First of all, let's talk about the selection and replacement of hydraulic oil for truck mounted crane. We know that the truck mounted cranes are controlled by the hydraulic system. The working medium of the hydraulic system is the hydraulic oil in the hydraulic oil tank, which needs to be replaced regularly. Do you know how to choose the hydraulic oil? How to judge whether the hydraulic oil needs to be replaced?
1、 Selection of hydraulic oil type for truck mounted crane
The specification of hydraulic oil commonly used with truck crane is: HM 46 / 32 anti-wear hydraulic oil. HM represents hydraulic oil. It is based on ordinary hydraulic oil (HL), with oiliness and antiwear agent, metal passivator, etc. the number 32 / 46 represents its density. In normal temperature area, HM46 is generally used, while in low temperature area, hm32 hydraulic oil is used. The truck mounted cranes are filled with a tank of hydraulic oil (HM46 in the South and hm32 in the North) when they are delivered from the factory. The filling amount of the hydraulic oil can be seen through the liquid level indicator of the oil tank.

2、 Change time of hydraulic oil for truck mounted crane
The first three months of the new car belong to the running in period with a lot of impurities. The hydraulic oil can be replaced after three months, and then it can be replaced once a year.

3、 Replacement method of hydraulic oil for truck mounted crane
Before changing the hydraulic oil, it is necessary to stop the crane operation and shut down the engine.
1. Drain the hydraulic oil in the hydraulic oil tank and add new hydraulic oil after cleaning the oil tank (the filter element with filter needs to be replaced).
2. Pull out the oil return pipe and start the engine to run at idle speed to make the oil pump work continuously for a period of time.
3. Operate each mechanism separately, and discharge the old oil in the circuit one by one with hydraulic oil until there is new oil flowing out of the oil return main pipe.
4. Finally, connect the oil return main pipe with the oil tank, and add new oil to the oil tank until it is specified. This oil change method is slower, but it can better protect the hydraulic system.
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