How to clean concrete mixer
1. Wash the inlet with water before each loading to keep the inlet moist during loading.
2. When loading, fill the vehicle-mounted clean water tank with water.
3. After loading, rinse the inlet and clean up the residual concrete near the inlet.
4. After discharging at the construction site, flush the discharging chute, and then add 30-40L of washing water to the concrete storage chute to keep the concrete storage chute rotating slowly forward when the vehicle returns.
5. Remember to discharge the sewage in the concrete storage tank before loading next time.
6, call it a day, thoroughly clean the concrete storage tank and around the import and export, to ensure that there is no cement and concrete caking.
7. If you accidentally forget to clean it in time, clean it in time with an air cannon afterwards to avoid the loss of cleaning the tank.
Maintenance of concrete mixer 1. First of all, for newly purchased vehicles, it is necessary to check the bolt fastening of all parts, including the connecting bolts between cans and reducers, the connecting bolts between the reducer base and the front desk, the connecting bolts between the tugboat base and the frame, and the connecting bolts between the auxiliary beam and the girder, etc., and ensure that they are checked regularly once a month.
2. Before driving every day, check whether the lubricating oil on the joint surface of idler and raceway is dry and replenish it in time to maintain good lubrication effect. Before starting the vehicle every time, check the oil level of the cooler and reducer to ensure that the oil level indicator is within the visual range; Check the sealing condition of the hydraulic oil circuit, and keep the hydraulic system clean and sealed, so as to avoid dust particles and moisture polluting the hydraulic oil of the system and causing the system to fail to work normally or be damaged.
3. Clean up the dirt on the roller and raceway at least once a month, and inject grease into the roller through the nozzle on the roller to ensure that the transmission shaft is lubricated at least once a month.
4. The components of the hydraulic system have high precision, especially the hydraulic pump of the mixer truck, which is easy to maintain, but the requirement of replacing the hydraulic oil regularly is high. After running for 500 hours, the filter element should be replaced at least once a year. When refueling or changing oil, the engine must be stopped, otherwise the hydraulic system will be damaged.
5. It is forbidden to weld and replace the water tank at will to avoid the impact of heavy objects; The water level display tube and filter screen should be replaced in time to avoid blockage and affect the judgment of water level. Always check whether all kinds of valve bodies are blocked or abnormal, and lubricate them in time. When they are used in an environment that may freeze, the water supply system must drain water to prevent the pipeline from freezing. Check the key sealing parts of the system frequently and apply sealant to the pipeline.
Daily maintenance of mixer 1. Butter should be used once a week where there is a butter nozzle to ensure normal lubrication. In addition, the joint surface of idler and raceway should be greased every 3 ~ 4 days to keep normal.
2. The hydraulic oil and reducer oil should be replaced every 0/00 days after the new car is used. No.68 antiwear hydraulic oil should be used in the oil storage tank of hydraulic system, No.46 hydraulic oil should be used in cold areas, and No.90 heavy-duty gear oil should be used in the reducer. It is recommended to use hydraulic oil brands with better quality.
3. SAE 15W ~ 40 engine oil should be used for the integral pump (referring to the pump without reducer oil tank).
4. After the new car is used 1 ~ 2 weeks, the connecting bolts and riding bolts between the auxiliary beam and the main beam should be tightened again, and then tightened once a month.
5. After the new car is used for 1 ~ 2 weeks, check whether the fixing bolt of the idler seat, the flange of the oil pump and the connecting bolt of the transmission shaft are loose, and then check once a month.
6. Every time the concrete mixer calls it a day, the inside and outside of the mixing drum should be cleaned to ensure that there is no accumulated blockage in the mixing drum. If the unloading time at the construction site exceeds 2 ~ 3 hours, the inside and outside of the mixing drum should be cleaned when returning to the site.
7. After the vehicle is used for a period of time, check the integrity of the sealing skin of the feed hopper. If the wear is serious, it must be replaced in time, otherwise it will easily lead to the wear of the drum mouth or the feed hopper.
8. When washing the car, it should be noted that the high-pressure water flow cannot be aimed at the sealing ring of the reducer flange for washing, so as not to damage the grease. Warning: If it is washed at the sealing ring, it may splash sand and other sundries, damage the sealing ring and parts, and affect the normal use of the vehicle.
9, concrete mixer should check the hydraulic oil level before each trip, the oil level should be higher than 2 ~ 75px.
10. The integral pump should check the oil level of the hydraulic oil system once a month, and the oil level should reach the notch of the bolt.
1 1. Every time the rear joystick changes from mixing to discharging or from discharging to mixing, it should be suspended in the middle position, and the next action should be carried out after the mixing drum stops rotating. When the handle is pulled to the limit position, you can't continue to exert force to prevent the oil pump from being stuck.
Maintenance of concrete mixer parts Maintenance method of mixer chassis From the perspective of using concrete mixer, mixer chassis parts are actually more prone to problems than engines, but many people often ignore the inspection of chassis parts in daily maintenance.
The parts of concrete mixer chassis prone to problems mainly focus on:
1. Shock absorber: Oil leakage of mixer truck is a precursor of shock absorber damage, and in addition, the bump on bad road surface is obviously increased or the braking interval is longer.
2. Rubber sleeve of suspension control arm: After the rubber sleeve is damaged, the vehicle will have a series of problems such as deviation and swing, and even four-wheel alignment will not help. If you look at the chassis carefully, the damage of the rubber sleeve is easy to find.
3. Steering rod: If the steering rod is loose, it will affect the steering control of the car. You can judge whether the steering tie rod is abnormal by grasping the tie rod and shaking it vigorously. If it shakes, it means it is not normal. Replace the ball head or pull rod assembly immediately.
4. Exhaust pipe: The exhaust pipe of the cement mixer is one of the easily damaged parts under the vehicle. Don't forget to take a look when overhauling. Especially the exhaust pipe with three-way catalytic converter, we should check it carefully. Usually, in order to maintain the chassis of the concrete mixer, we can make a chassis armor for the chassis of the mixer, which can play a very good role in maintaining the chassis, and we should also pay attention to prevent the chassis of the concrete mixer from being hit when driving.
5. Universal joint dust cover: Don't underestimate the dust cover outside the universal joint of the mixer. It not only has the function of dust prevention, but also avoids the loss of grease around the universal joint. Once the dust cover is damaged, the grease will be lost soon. Due to dry grinding, the universal joint is easily damaged.
Maintenance of concrete mixer tire 1, remove pebbles and other inclusions on tire tread to see if there are problems such as foaming, delamination, tearing, swelling and aging.
2. When removing the tire, derust the rim, check whether the inner tube and liner are damaged or wrinkled, and inflate the tire with air pressure according to the regulations to flan or transpose the tire.
3. Check the spare tire regularly.
Signs of problems in the maintenance of brake system of concrete mixer: 1. Under normal circumstances, when braking, you will feel that the pedal is firm and the mixer will stop smoothly along a straight line. If not, be sure to pay attention.
2. The problem of indicator light. If the "brake" light is on when the mixer is running, put down the handbrake at this time, which means that there may be serious problems in the brake system of the mixer and it needs to be checked and repaired in time.
3. During driving, if there is abnormal noise when braking, attention should also be paid to check whether there is any problem.
Brake system maintenance tips: 1. Usually pay more attention to check the brake pads. Under normal driving conditions, the service life of the front brake pad of the mixer is 30000-50000km, and the service life of the rear brake pad is 12- 15000km. The service life of brake pads will be shorter if you often drive on roads with many turns up and down slopes. Be sure to pay more attention If serious wear is found, please replace the brake pads immediately.
2. Replace the brake oil regularly. The added and replaced brake oil model must match the original brake oil model, otherwise a chemical reaction will occur, resulting in sludge and inorganic salt precipitation, which will block the pipeline over time and affect the normal use of the brake system, thus causing serious consequences.
How to deal with the brake failure of concrete mixer: If the concrete mixer suddenly finds the brake failure during driving, remember not to panic. First, control the direction and change the high gear to the low gear, so that the traction resistance of the engine will quickly reduce the speed. At the same time, combined with the hand brake, the hand brake must be moderate. If it is pulled too tightly, the brake disc will "lock up"; if it is pulled too slowly, the brake disc will wear out and lose its braking function. When the brake fails, if the vehicle itself can't control the speed, it will decisively use natural obstacles such as stones and trees on the roadside to cause resistance to the vehicle, thus forcing the mixer to stop.
The maintenance drive of the mixer truck is used to drive the concrete tank to rotate. It consists of a power take-off, a universal shaft, a hydraulic pump, a hydraulic motor, a control valve, a hydraulic oil tank and a cooling device. If this part stops working due to failure, the concrete tank will not be able to rotate, resulting in the scrapping of the concrete in the car, and even the whole tank of concrete will be seriously condensed in the tank, resulting in the scrapping of the concrete mixer. Therefore, whether the driving device is reliable is a problem that must be paid great attention to in use. In order to ensure the integrity and reliability of the driving device, the following maintenance work should be carried out:
1, the universal rotating part is a fault-prone part, so it is necessary to add grease on time, regularly check the wear and tear, and repair and replace it in time. The team should have a spare cardan shaft assembly to ensure that it can resume work within a few minutes in case of failure.
2. Ensure that the hydraulic oil is clean. The working environment of concrete mixer is harsh, so it is necessary to prevent sewage and sediment from entering the hydraulic system. Hydraulic oil should be replaced regularly according to the requirements of the user manual. Once water or sediment is found in the hydraulic oil during the inspection, it is necessary to stop immediately to clean the hydraulic system and replace the hydraulic oil.
3. Ensure that the hydraulic oil cooling device is effective. Regularly clean the hydraulic oil radiator to prevent the radiator from being blocked by cement, and check whether the radiator electric fan operates normally to prevent the hydraulic oil from exceeding the standard. As long as the hydraulic part ensures that the hydraulic oil is clean, there are generally few faults.
Paint maintenance 1 and crack prevention maintenance of the tank body of concrete mixer: If cracks appear on the surface of the mixer after driving, if the paint surface is not maintained at ordinary times, the metallic paint may produce a fine crack, which will continuously penetrate the paint until it penetrates the whole paint layer. This phenomenon is called "cracking". Sometimes cracks will appear because of the quality problems of heavy paint. If there is car wax in the crack, you will find striped cracks in the car body. Frequent waxing can gradually reduce the occurrence of cracks.
2. Anti-fading maintenance: the small concrete mixer fades, and the fumes and pollutants in the atmosphere are the main reasons for the discoloration and fading of the car paint. Fading is different from oxidation. When fading occurs, uneven color difference will appear in the car paint. Moderate and light fading can be treated by grinding and polishing, and must be repainted in severe cases.
3. Anti-corrosion trace: The corrosion trace of the small mixer is surface wear. Insects, bird droppings, tree sap, tar and asphalt can all cause corrosion marks. Slight corrosion marks can be solved by grinding and polishing.
4. Water mark: The water mark of the mixer truck is an annular mark left by the evaporation of water droplets. Cars that are oxidized and often cleaned with detergent are easy to get water marks. Slight water marks can be cured by waxing and polishing, and serious ones need polishing or painting.
5. Shallow scratches: the concrete mixer has shallow scratches. Due to friction and improper daily maintenance, the paint surface of the small concrete mixer was slightly scratched, but the primer was not exposed. This kind of scratch is more obvious in the sun. It is usually removed by professional polishing method.
Precautions for paint maintenance of mixer truck surface 1, paint surface oxidation. Under the irradiation of ultraviolet rays from the sun, the paint film will continuously evaporate oil into the air to protect itself, which will lead to excessive oil loss on the paint for a long time. The brightness and depth of the paint surface are greatly reduced, so that the paint surface turns white slowly, forming an oxide layer, shortening the service life of the car paint and being visible to the naked eye.
2. Traffic movies. Portable mixer has a strong electrostatic layer due to friction during driving, which has a strong adsorption capacity for dust, oil pollution and chemical dust. After a long time, it will form a hard traffic film, which is easy to cause oxidation and corrosion of paint surface. In this case, grinding and polishing can be used.
The maintenance cycle of concrete mixer scientifically determines the interval mileage of various maintenance operations, which can not only keep the concrete mixer in good technical condition, but also save you maintenance costs and maintenance costs. New cars with good general technical conditions can appropriately extend the maintenance cycle. However, the maintenance cycle of concrete mixers with poor technical conditions or poor service conditions should be shortened appropriately.
1. Daily maintenance content: visual inspection.
Before leaving the car, look around the mixer to see whether the lighting device is damaged, whether the car body is tilted, and whether there is oil leakage or water leakage; Check the tire appearance; Check the condition of doors, hood, trunk lid and glass. The signal device checks the key to turn on the ignition switch (don't start the engine), check the lighting of all alarm lights and indicator lights, and start the engine to see if all alarm lights are off normally and the indicator lights are still on. Check the fuel. Check the indication of fuel gauge and replenish fuel.
2. Weekly maintenance content: tire pressure
Check and adjust the tire pressure, and clean the sundries on the tire. Don't forget to check the spare tire. Check the engine and all kinds of engine oil, check the fixation of engine parts, and check whether the joint surfaces of the engine are leaking oil or water; Check and adjust the belt tightness; Check the pipeline and wire fixation of each part; Check the makeup oil; Check the supplementary coolant; Check the supplementary electrolyte; Check the auxiliary power steering oil; Clean the radiator surface; Replenish windshield cleaning fluid, etc. Clean the interior and exterior of the car.
3. Monthly maintenance content: external inspection.
Patrol the mixer to check the damage of light bulb and lampshade; Check the fixing of the body trim; Check the condition of the rearview mirror. Check tire wear and clean luggage compartment; Replace the tire when it is close to the tire wear trace, and check whether the tire has bulging, abnormal main wear, aging cracks and hard injuries. Cleaning and waxing thoroughly clean the inside of the car; Clean the sundries on the surface of water tank, oil radiator and air conditioner radiator. Chassis Check the chassis for oil leakage. If there are traces of oil leakage, check the gear oil quantity of each assembly and replenish it appropriately, and fully lubricate all nozzles of the chassis. Other detailed weekly repetitive maintenance contents.
4. Half-year maintenance content: engine appearance.
Clean the engine surface, and pay attention to the waterproof treatment of electrical parts when cleaning. If the electrical parts have high waterproof requirements, it is necessary to avoid using high-pressure and high-temperature water guns to clean the engine. You can use a brush dipped in cleaning agent to clean the engine surface.
5. Annual maintenance content: ignition timing
Check and adjust the ignition timing of the internal mixer engine. It is best to check and adjust the fuel supply timing of diesel engine in the repair shop. Valve Clearance For engines with ordinary valves, check the high-speed valve clearance. Clean, lubricate and wash the oil stains on the hinge mechanism of engine hood, door and luggage compartment, and readjust and lubricate the above mechanisms.
6. Two-year maintenance content: antifreeze.
The general service life of antifreeze is two years. At that time, antifreeze should be replaced in the annual maintenance, and the cooling system should be thoroughly cleaned. Brake system Due to the hygroscopicity of the brake system, the brake fluid is changed every two years.
Misunderstanding of concrete mixer maintenance 1, scribbling butter.
Butter is mainly used to lubricate the mixer. Generally, the rotation and meshing of mixers need butter. Some maintenance unions also put butter on the cylinder gasket to enhance the sealing performance of the engine. This practice is wrong. After the cylinder bolts are tightened, some butter will inevitably flow into the cylinder, and the residual butter outside will form a gap between the cylinder gasket, the cylinder head and the plane of the engine block at high temperature, which will reduce the sealing performance.
Myth 2: Do not change the oil for a long time.
Changing oil is a point that many mixer drivers tend to ignore. If you just add oil randomly for a long time, many parts of the engine will lack lubrication, and in the long run, the wear will increase. Diesel engines will also suck a lot of impurities into the oil during operation. If the oil is not changed for a long time, it may lead to problems such as tile burning and shaft locking.
Misunderstanding 3, open flame heating piston
Experienced maintenance workers know that the piston should be heated and expanded before installing the piston pin. Some people directly heat the piston with an open flame to save trouble. In this way, the piston will be deformed due to uneven heating. The correct way is to put the piston in hot oil and heat it evenly.
Myth 4. Grind the bearing bushing with emery cloth.
Scraping tile technology is difficult for inexperienced maintenance workers to master. Therefore, when replacing the bearing bush, in order to increase the contact area between the bearing bush and the crankshaft, abrasive cloth is used to polish instead of scraping the bearing bush. This method will make the hard particles on the abrasive cloth embedded in the bearing alloy, accelerate the wear of the journal during the operation of the diesel engine and shorten the service life of the crankshaft.