Why is the excavator cylinder always broken? See if you have these five operations!
Source:机惠多工程机械
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Author:instrument-1022132
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Published time: 2020-11-16
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The newly-purchased excavator didn't do much work, and it kept breaking down. Some excavator failures were accumulated due to long-term improper operation.
The newly-purchased excavator didn't do much work, and it kept breaking down. Some excavator failures were accumulated due to long-term improper operation.
1. The working device is fully recovered and walks
When the working device is not fully retracted, the bucket can easily hit the rock, and the piston of the cylinder will generate a large load, which will cause the internal damage of the cylinder and the cracks around the pin.
2. Digging with walking force
When hydraulic oil is mixed with water, it is easy to emulsify and deteriorate. If it enters the hydraulic system, it will cause the parts to rust. The rust slag flows in the hydraulic system for a long time, the hydraulic pressure will be affected, and the movement of the big and small arms and the bucket will become weak.
3. The cylinder rod expands to the limit for excavation
The hydraulic cylinder is telescopic to the end position. In this case, the working cylinder and frame will produce a large load. The impact of the bucket teeth and the impact of each axle pin will cause the internal damage of the cylinder and affect other hydraulic components.
4. The rear of the crawler floats for excavation work
Using the lifting power of the rear of the excavator body to carry out excavation operations. When the bucket and the rock are separated, the bucket, configuration, frame, slewing ring, etc. will be heavily loaded when the car body falls, which is easy to cause damage.
5. The excavator starts construction without standing
On uneven gravel roads, if the excavator is not stopped and started working, it will cause uneven force on the lower frame over time and cause damage to the lower frame. It is best to put some soil underneath to make the ground stable, and then work again.
So if you want the excavator to work for a long time, you must usually do these small things~
Cylinder maintenance method:
One. The hydraulic oil should be replaced regularly during the use of the cylinder, and the filter screen of the system should be cleaned to ensure cleanliness and extend the service life.
Two. Each time the oil cylinder is used, it needs to be fully extended and retracted for 5 strokes and then run with load. This can exhaust the air in the system and preheat the systems, which can effectively avoid the presence of air or water in the system, causing gas explosion (or scorch) in the cylinder body, which will damage the seals and cause leakage in the cylinder. Wait for failure.
three. Control the system temperature. Excessive oil temperature will reduce the service life of the seal. Long-term high oil temperature will cause permanent deformation of the seal, or even complete failure.
four. Protect the outer surface of the piston rod to prevent bumps and scratches from damaging the seals. Frequently clean the mud and sand on the dust ring of the cylinder dynamic seal and the exposed piston rod to prevent difficult-to-clean dirt sticking to the surface of the piston rod Into the inside of the oil cylinder damage the piston, cylinder or seal.
Fives. Check the connections of threads, bolts, etc. frequently, and tighten them immediately if they are loose.
Six. Lubricate the connecting parts frequently to prevent rust or abnormal wear in an oil-free state.
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