The purpose of the maintenance of the excavator is to reduce the common failures of the equipment, increase the service life of the equipment, reduce the shutdown time of the equipment, improve the efficiency, and reduce the work cost. If the fuel, grease, water and gas are managed well, common failures can be reduced by 70%. In fact, about 70% of common failures are caused by improper management methods.
1 Fuel management method
Different types of diesel engines should be used according to different operating temperatures;
Diesel engines must not seep into residues, dirt and water, otherwise the fuel pump will be damaged prematurely;
The high water content of the solid paraffin and sulfur in the fake fuel will cause harm to the diesel engine; the diesel fuel tank should be filled with fuel after working every day to avoid water droplets in the inner cavity of the car fuel tank;
Open the drain valve at the bottom of the diesel fuel tank to add water before working every day;
After the diesel engine material is exhausted or the filter element is replaced, the gas in the road must be exhausted.
2 Grease management method
Choosing grease (unsalted butter) can reduce the damage of the fitness sports surface and avoid noise. When storing the lubricating grease, it must not penetrate into dust, sand, water and its residues;
It is strongly recommended to use lithium-based grease G2-L1, which has good anti-wear performance and can be used with light loads;
When filling, squeeze all the old oil as much as possible and wipe it clean to avoid sand sticking. 3Maintenance of filter element
The filter element has the function of filtering the residue in the fuel pipe or air supply, preventing it from invading the system software and causing common failures;
Various filter elements should be replaced on time in accordance with the provisions of the (practical operation and maintenance manual);
When replacing the filter element, check whether there is metal material attached to the old filter element. If metal particles are found, the diagnosis should be made immediately and improvement measures should be adopted;
Apply authentic filter elements that meet the requirements of the equipment. Counterfeit and inferior filter elements have weak filter working ability, and the quality of the filter layer and the quality of raw materials do not meet the requirements, which will seriously endanger all normal applications of the equipment.
4 The content of on-time maintenance
①The fuel filter element and additional fuel filter element should be replaced after 250 hours of operation of the new mobile phone; check the gap of the diesel engine cylinder.
② Usual maintenance. Check, clean or replace the air filter element; clean the inside of the refrigeration system; regularly check and tighten the track shoe anchor bolts; regularly check and adjust the chain rail anti-tension degree; check the air inlet electric heater; replace the bucket teeth; adjust the bucket gap; Check the front window cleaning fluid level; check and adjust the central air conditioner; clean the wooden floor in the car cab; replace the filter element of the breaker (selecting parts and accessories). When cleaning the inside of the refrigeration system, after the diesel engine has enough water to cool down, slowly unscrew the water filler cap to release the internal working pressure of the water storage tank, and then add water; there is no need to carry out the cleaning work while the diesel engine is working, the high-speed electric fan Will cause risks; when cleaning or replacing the refrigerant, the equipment should be parked on a level road.
③ Check new items before starting the diesel engine. Check the aspect ratio of the liquid level of the refrigerant (drain water); check the engine oil level, add car oil; check the fuel level (add fuel); check the gear oil level (add gear oil); check whether the air filter element is blocked ; Check the cable; check whether the sound horn is normal; check the dampening bucket; check the water and precipitation in the oil and gas separator.
④ Maintain new items every 100. Boom cylinder cylinder head shaft pin; boom foot pin; boom cylinder cylinder rod end; arm cylinder cylinder head shaft pin; boom and stick coupling pin; arm cylinder cylinder rod end; bucket cylinder cylinder head shaft pin ; Half rod crankshaft coupling pin; bucket rod, bucket cylinder cylinder rod end; bucket cylinder cylinder head shaft pin; bucket rod crankshaft coupling pin; check the oil level in the rotating organization cabinet (add car oil); drain from the diesel fuel tank Out of water and precipitation.
⑤Maintain new items every 250H. Check the oil level in the final gear box (add oil); check the battery electrolyte; replace the oil in the engine oil pan, replace the diesel engine filter element; lubricate the slewing ring (2 locations); check the tension of the engine belt, and Check the tightness of the compressor drive belt and make adjustments.
⑥ Maintain new items every 500h. In addition, carry out new maintenance projects every 100 and 250H; replace the fuel filter element; check the aspect ratio of the lubricating grease of the rotating transmission gear (lubricating grease); regularly check and clean the heat pipe radiator, water cooler radiator, and cooler heat pipe heat dissipation Replace the hydraulic filter element; replace the oil in the final gear box (only carried out at 500h for the first time, and once after 1000h); clean the air filter element inside and outside the air conditioner system software; replace the gear oil vent filter element.
⑦Maintain new items every 1000h. In addition, carry out new maintenance projects every 100, 250 and 500h; replace the oil in the rotating organization cabinet; check the oil level of the shock absorber cover (return to the car oil); check all the standard parts of the turbocharger; check the turbocharger stator Backlash; check and replace the tension of the generator belt; replace the corrosion-resistant filter element; replace the oil in the final gear box.
⑧ Maintain new items every 2000h. First carry out new maintenance items every 100, 250, 500 and 1000h; clean the hydraulic oil tank filter; clean and check the turbocharger; check the generator set and starter motor; check the diesel engine valve (and adjust); check the shock absorber.
⑨Maintenance of about 4000h. The inspection of the centrifugal water pump is upgraded every 4000h; the new item of gear oil replacement is upgraded every 5000h.
⑩Long-term storage. When the equipment is stored for a long time, in order to avoid the rust of the hydraulic oil cylinder, the equipment should be placed on the ground during work; the entire equipment should be cleaned and dried and stored in the dry natural environment in the room; if the standard is restricted, only outdoors When storing, the equipment should be parked on a concrete floor with good drainage pipes; before storing, fill the diesel fuel tank with oil, lubricate all positions, change gear oil and automobile oil, and coat the exposed stainless steel passivation of the hydraulic oil cylinder. Salt butter, remove the battery's cathode terminal block, or unload the battery for independent storage; add a moderate proportion of automobile antifreeze to the cooling circulating water according to the minimum operating temperature; start the diesel engine once a month and actually operate the equipment, which is convenient Moisturize the fitness components, and charge the battery; turn on the soft start and run for 5-10 minutes
