How many hours does an excavator usually last?

The service life of general excavators (made in China) is 15 years. The time of excavator can be adjusted, but it needs professionals and professional tools.

Daily maintenance of excavators: the purpose of regular maintenance of excavators is to reduce machine failures and extend the service life of machines; Shorten the downtime of the machine; Improve work efficiency and reduce operating costs. As long as the fuel, lubricating oil, water and air are well managed, 70% of failures can be reduced. In fact, about 70% of failures are caused by poor management.

Fuel management:

Choose different brands of diesel oil according to different ambient temperatures (see table1); Diesel oil cannot be mixed with impurities, lime soil and water, otherwise it will make the fuel pump wear prematurely; The high content of paraffin and sulfur in inferior fuel will damage the engine; After daily operation, the oil tank should be filled with oil to prevent water droplets from forming on the inner wall of the oil tank; Open the drain valve at the bottom of the oil tank to drain water before daily operation; After the engine runs out of fuel or the filter element is replaced, the air in the road must be exhausted. The lowest ambient temperature is 0℃-10℃ -20℃ -30℃. The brand of diesel oil is 0#-10# -20# -35#

Management of other oils:

Other oils include engine oil, hydraulic oil and gear oil; Different brands and grades of oils cannot be mixed; Different kinds of excavator oil have different chemical or physical additives in the production process; Make sure the oil is clean and prevent impurities (water, dust, particles, etc.). ) from mixing; Select the oil label according to the ambient temperature and use. When the ambient temperature is high, the engine oil with high viscosity should be selected; when the ambient temperature is low, the engine oil with low viscosity should be selected; The viscosity of gear oil is relatively large to adapt to large transmission load, and the viscosity of hydraulic oil is relatively small to reduce the flow resistance of liquid.

Lubricating oil management:

Using lubricating oil (butter) can reduce the wear of moving surfaces and prevent noise. When storing grease, dust, sand, water and other impurities should not be mixed; It is recommended to choose lithium-based grease G2-L 1, which has good wear resistance and is suitable for heavy load conditions. When filling, try to squeeze out all the old oil and wipe it clean to prevent sand sticking.

Maintenance of filter element:

The function of the filter element is to filter impurities in the oil circuit or gas circuit to prevent impurities from invading the system and causing failures; Various filter elements should be replaced regularly according to the requirements of the operation and maintenance manual; When replacing the filter element, check whether the old filter element is attached with metal, and diagnose and take improvement measures in time if metal particles are found; Use pure filter elements that meet the requirements of the machine. The poor filtration ability of fake and inferior filter elements, and the quality and material of filter layer do not meet the requirements, which will seriously affect the normal use of the machine.

: Contents of regular maintenance:

Replace the fuel filter and additional fuel filter after the new machine works for 250 hours; Check the clearance of the engine valve.

Daily maintenance; Check, clean or replace the air filter element; Clean the inside of the cooling system; Check and tighten the track shoe bolts; Check and adjust the back tension of the track; Check the air inlet heater; Replace the bucket teeth; Adjust the bucket clearance; Check the liquid level of the front window cleaning solution; Check and adjust the air conditioner; Clean the floor of the cab; Replace the crusher filter element (optional).

When cleaning the inside of the cooling system, after the engine is fully cooled, slowly loosen the filler cap, release the internal pressure of the water tank, and then drain the water; Don't clean the engine when it is working, the high-speed rotating fan will cause danger; When cleaning or replacing coolant, the machine should be parked on a level ground; Replace the coolant and corrosion inhibitor according to Table 3. The ratio of antifreeze to water is as required in Table 4.

Every 100 maintenance items. Boom cylinder head pin shaft; Boom pin; Rod end of boom cylinder; Pin shaft of bucket cylinder head; Connecting pin of boom and bucket arm; The cylinder rod end of the stick cylinder; Bucket cylinder head pin shaft; Half-bar connecting rod connecting pin; Bucket rod and rod end of bucket cylinder; Bucket cylinder head pin shaft; Connecting pin of connecting rod; Check the oil level in the slewing mechanism box (refueling); Drain water and sediment from the fuel tank.

Maintenance items Check the oil level of the main reducer box every 250 hours (add gear oil); Check the battery electrolyte; Change the oil in the engine oil pan and engine filter; Lubricate the slewing bearing (2 places); Check the tension of fan belt, check the tension of air conditioner compressor belt and adjust it.

Maintenance items every 500h h. Maintenance items every 100 and 250H at the same time; Replace the fuel filter element; Check the height of the grease for the slewing pinion (add grease); Check and clean radiator fins, oil cooler fins and cold sensor fins; Replace the hydraulic oil filter element; Change the oil in the final drive box (only at the first 500 hours, and then at 1000 hours); Clean the air filter inside and outside the air conditioning system; Replace the hydraulic oil drain element.

Every 1000h maintenance project. At the same time, carry out maintenance projects every 100, 250 and 500h; Replace the oil in the slewing mechanism box; Check the oil level (oil return) of the shock absorber housing; Check all fasteners of turbocharger; Check the clearance of turbocharger rotor; Inspection and replacement of generator belt tension; Replace the anti-corrosion filter element; Change the oil in the final drive box.

Maintenance items every 2000 hours 1. Complete maintenance items every 100, 250, 500 and 1000h; Clean the filter screen of the hydraulic oil tank; Clean and check the turbocharger; Check the generator and start the motor; Check the engine valve clearance (and adjust); Check shock absorber.

Maintenance time exceeds 4000 hours. Increase the inspection of the water pump every 4000 hours; Add the item of changing hydraulic oil every 5000 hours.

Long term storage. When the machine is stored for a long time, the working device should be placed on the ground to prevent the piston rod of the hydraulic cylinder from rusting; The whole machine is cleaned, dried and stored in an indoor dry environment; If it can only be stored outdoors due to conditions, the machine should be parked on a well-drained cement floor; Before storage, fill the fuel tank, lubricate all parts, and replace hydraulic oil and engine oil.

Coat a thin layer of butter on the exposed metal surface of the piston rod of the hydraulic cylinder, and remove the negative terminal of the battery, or take out the battery and store it separately; According to the lowest ambient temperature, an appropriate proportion of antifreeze is added to the cooling water; Start the engine once a month, operate the machine to lubricate the moving parts and charge the battery at the same time; Turn on the air conditioner for refrigeration for 5- 10min.