The cold winter is approaching, and construction sites across the country have begun to cease operations. This is not only the time when workers are resting, but also the golden age of equipment maintenance. The equipment is well maintained and the money can make a lot of money. So how is the crane maintained in winter? The technician of Yellow River from Xinxiang Crane Rental Company will introduce the maintenance method of crane in winter in detail.
Maintenance method of crane in winter:
1. Oil product selection
Engine oil selection: Engine oil has not been replaced for a long time, it will accumulate a lot of carbon deposits and impurities, increase the viscosity of the oil, and cause problems such as insufficient heat dissipation or inadequate lubrication during the warm-up period. , Connecting rod, oil pump and other parts cause direct damage or hidden damage. When choosing lubricating oil in winter, you should choose oils with low oil viscosity, such as 5W, 10W, 15W, and four-grade oil.
Hydraulic oil maintenance and maintenance: When the temperature is low in winter, the hydraulic oil has a high viscosity, and when it is not warmed up or the oil temperature is not high, it is easy for the boom to rise, there is no combined action, and the warm up time is too long. It should run at idle speed for a period of time before entering the high-speed state to prevent excessive viscosity from causing damage to oil pumps, pipelines and other components. If the temperature is low, it can be replaced with 32 # hydraulic oil.
Gear oil replacement and maintenance: Crane gear oil maintenance cycle is about one year. When the gear oil is worn for a long time, due to factors such as reduced air temperature or oil deterioration, when the gear is running at high or low speed, it cannot produce a comprehensive oil film on the gear surface, which causes abnormal wear or rust on the gear contact surface. In winter, parts such as axles and reducers should be cleaned and replaced with new oil.
Check whether the exposed lines are aging or loose, and comprehensive inspection and repair should be done before winter comes. The more common problems are: the height limiter switch is often exposed, the switch is connected to the pull rope position, and it is easy to form dripping water. When it is cold, the switch is blocked due to rapid freezing, and the line of sight is poor at night. Protection is easy to cause safety accidents or losses. When using it in the morning, check the long-angle sensor cable to clear the ice cubes to prevent the cable from being frozen during operation and the wire skin rupturing, causing leakage and string current. Check the battery to see if the ventilation holes are blocked. If necessary, cover and protect them to avoid direct exposure.
3.Check the gas path
Check the drain valve of the gas storage tank to see if the exhaust gas is normal when draining water. It should be checked once every day before stopping at work to prevent the valve from freezing or opening at night due to temperature drop at night, resulting in air leakage or blockage of the air pipe and valve body.
4. Wheel maintenance
The horizontal deflection value of the crane wheel is an important technical parameter of the crane. Excessive deviation of the deflection value will cause rails, increase running resistance, generate vibration and noise, increase track and wheel wear, and greatly reduce the life of the crane wheels. The crane manufacturing technical conditions must stipulate the allowable value for the wheel horizontal deflection.
① Wheels should be scrapped if cracks are found;
② The ellipse of the wheel tread should be scrapped when it reaches 1mm;
③ Bend deformation of the flange thickness to 20% of the original thickness should be discarded.
The above is the related introduction of " How to maintain a crane in winter? " Understanding the above content, I hope you will be helpful in maintaining the crane in winter.