In the use of cranes, the inevitable wear and tear of the moving parts, the loosening of the connector, the deterioration of the oil and the corrosion of the metal structure will cause the technical performance, economic performance and safety performance of the crane to be reduced in varying degrees. Therefore, before the crane parts wear and tear have not reached the degree of affecting the crane failure, in order to prevent and eliminate the hidden danger, the crane is often in good condition, and the crane should be maintained and maintained.
In the use of cranes, the inevitable wear and tear of the moving parts, the loosening of the connector, the deterioration of the oil and the corrosion of the metal structure will cause the technical performance, economic performance and safety performance of the crane to be reduced in varying degrees. Therefore, before the crane parts wear and tear have not reached the degree of affecting the crane failure, in order to prevent and eliminate the hidden danger, the crane is often in good condition, and the crane should be maintained and maintained.
(1) maintenance and maintenance periodic table
In order to ensure the normal work of the hydraulic system, it is necessary to maintain the cleanliness of the system because of many factors. In order to ensure the normal work of the hydraulic system, the cleanliness of the system must be kept. It affects the flow rate of the oil filter and affects the normal work of the hydraulic system. For new cars, 100 days of operation usually require cleaning of gasoline and polyester or silk fabrics for filter. After every 300 working days, clean it once every other day.
Note: different grades of hydraulic oil, gear oil and grease can not be mixed with each other.
1. maintenance form for hydraulic oil and gear oil:
(2) maintenance and maintenance methods and matters of attention
1. maintenance of hydraulic oil: the crane is a full hydraulic transmission. The quality, viscosity and cleanliness of the hydraulic oil are very important to the normal work of the crane. If you ignore the replacement of the hydraulic oil, it is very easy to cause all kinds of failure of the machine and shorten the working life of the machine. The company will not undertake all consequences of your failure to replace and filter hydraulic oil according to the instructions.
Whenever the pollution of hydraulic oil is serious, it should be filtered or replaced in time. The replacement of hydraulic oil is carried out by JB/T9737.3-2000.
Appropriate hydraulic oil is selected according to the ambient temperature.
Hydraulic oil shall not be used for more than 24 months. After more than 24 months, it can not be used even after filtration.
The temperature of hydraulic oil
The maximum working temperature of hydraulic oil is 80 degrees centigrade
2. hydraulic oil brand name
Ambient temperature above 5 degrees centigrade: L-HM46
The ambient temperature is -15 C ~ 5 C: L-HM32
The ambient temperature is -15 C ~ -30 centigrade: L-HV22
Ambient temperature below -30 degrees Celsius: No. 10 aviation hydraulic oil
3. check oil quantity
The amount of oil should be checked when the crane is in the running state. The liquid temperature liquid level meter has dual functions, it is marked with scale, it can display the oil level and the temperature of the hydraulic oil. When checking oil, it is necessary to keep the oil level between the middle of the liquid temperature liquid level meter and the top scale.
Note: when changing the hydraulic oil, clean the oil tank and replace the hydraulic oil filter element.
(3) maintenance of reducer mechanism:
1. Maintenance of the main lifting mechanism: 10-15 minutes of empty operation before refueling, with the appropriate hexagonal wrench screw down the oil hole cock, drain the old oil. The oil hole screw plug is tightened, the oil injection hole screw plug and the oil standard hole screw plug are unscrewed, the lubricating oil is added, the oil is spilled into the oil mark hole, and then the oil injection hole cock and the oil mark hole screw plug are tightened.
The fuel injection of main hoist is about 7 litres. Winter: Mobil SHC220, or the Great Wall L-CKT220 gear oil; summer: L-CKD220 or L-CKD320 gear oil.
2. Maintenance of auxiliary lifting mechanism: 10 to 15 minutes of empty operation before refueling, with the appropriate hexagonal wrench screw down the oil hole cock, drain the old oil. The oil hole screw plug is tightened, the oil injection hole screw plug and the oil standard hole screw plug are unscrewed, the lubricating oil is added, the oil is spilled into the oil mark hole, and then the oil injection hole cock and the oil mark hole screw plug are tightened.
The amount of auxiliary oil injection is about 4 litres. Winter: Mobil SHC220, or the Great Wall L-CKT220 gear oil; summer: L-CKD220 or L-CKD320 gear oil.
3. Maintenance of rotary mechanism: 10-15 minutes of empty operation before oil change, unscrew the oil release plug at the bottom of the reducer, drain the old oil, tighten the oil release plug. Unscrew the oil injection screw plug, add the specified amount of lubricating oil and tighten the oil injection screw plug.
The oil content is about 7 litres in winter: Mobil SHC220 or the Great Wall L-CKT220 gear oil; summer: L-CKD220 or L-CKD320 gear oil.
(4) the lubrication part of the car:
Lubricating position control table
Be careful:
A) clean the oil cup and be on the surface before filling.
B) lubricated oil is also regularly added to the sliding surfaces not listed in the table.
C) when the hoist arm is stored on the boom bracket, a lubricating grease should be applied once a month to the exposed part if the hanger's amplitude oil cylinder piston rod is partially exposed.
D) the centralized working time is 35 hours, and the No. 3 grease is strictly prohibited. The total capacity of the pump is 2 litres.
(5) engine oil at home and abroad
Strictly according to the requirements of the engine manual.
In the use of cranes, the inevitable wear and tear of the moving parts, the loosening of the connector, the deterioration of the oil and the corrosion of the metal structure will cause the technical performance, economic performance and safety performance of the crane to be reduced in varying degrees.
Therefore, before the crane parts wear and tear have not reached the degree of affecting the crane failure, in order to prevent and eliminate the hidden danger, the crane is often in good condition, and the crane should be maintained and maintained.
