To ensure the safety of equipment use and operation, the crane shall be operated, maintained and repaired normally during lease. What should we do after hoisting? Today, Huai'an truck mounted crane rental will introduce to you what fault detection should be done for the truck mounted crane in rental use?
First, the crane shall be inspected and maintained regularly during use. Within the specified two periods of time, maintenance personnel and operators shall jointly carry out multiple maintenance on mechanical equipment, focusing on cleaning, lubrication, adjustment, disassembly and maintenance. When the general assembly of the equipment reaches or approaches the service life limit, the mechanical dynamic performance will significantly decline, the fuel consumption will increase, and the operation will be ineffective. Comprehensive and thorough repair measures will be taken. If the sound is abnormal or the equipment can no longer play its normal production performance on the appearance, the purpose of replacing the old with the new should be achieved.
Leakage symptom of crane hydraulic cylinder: after the boom retracts, the weight of the crane declines, indicating that the hydraulic cylinder is leaking. Leakage detection method of hydraulic cylinder: when there is a pressure difference between the two ends of the piston seal, the hydraulic oil flows from the high-pressure chamber to the low-pressure chamber, and the piston of the hydraulic cylinder is a two-way seal.
There are two structures, one is bidirectional seal, the other is bidirectional seal composed of two unidirectional seals. The initial sealing performance of the hydraulic cylinder piston depends on the sealing quality, the size of the piston groove, the processing quality of the piston and the inner surface of the cylinder. The change of leakage at different positions of the piston depends on the machining quality of the inner surface of the cylinder. As long as the pressure difference is the same, the internal leakage is the same whether the rod cavity faces the rod cavity or the rod cavity faces the rod cavity.
The main reason for air entering the hydraulic system is that the pipe joints or hydraulic components are poorly sealed, and the local pressure is lower than atmospheric pressure, so that air enters the system; The diaphragm of the oil tank is damaged, which makes the oil in the oil tank easy to produce bubbles, and the air will not be discharged after replacing the new oil or repairing the hydraulic system; The oil level in the oil tank is too low after the pipeline leaks oil.
Design, processing and assembly defects of the hydraulic system itself. It can only be modified, such as adding radiators and increasing pipe diameter. High oil temperature due to hydraulic oil change. Always keep the oil clean and replace the hydraulic oil in time. (Please pay special attention to that there is usually an air filter element on the hydraulic oil tank. Users often do not notice this element.
When there is a large amount of dust on the construction site, if there is no filter element, the dust is easily sucked into the hydraulic oil tank. Another point is that after replacing the master cylinder or motor, please pay attention to cleaning the hydraulic oil tank and filter element, because the scrap metal powder of the iron core may be in the oil tank.
Huai'an Crane Rental The monthly inspection has passed the inspection and operation to check the signs of minor faults caused by the leakage, working pressure, temperature, vibration and noise of the lifting machinery. It is undoubtedly abnormal to understand the operating technology of the bare machine leased by the truck crane and check the source of the kitten by observing the objectivity test of the structure, support plate and transmission system of the truck crane lease
