Shanyi Lehman hydraulic oil hose adopts three-layer steel wire design, high pressure resistance, high temperature resistance, corrosion prevention, specially customized American a standard h-type double sealing joints, to put an end to the oil leakage phenomenon of the oil hose. And the aperture is larger, faster oil speed, greatly improving the efficiency of the work. Other companies in the same industry it is still using the old bend through the line tubing, can not resist high pressure, high temperature, poor sealing, oil leakage and oil seepage phenomenon is obvious and aperture is small, over the oil speed is slow and low efficiency, the mountain a Lehman full range of models speed limiters, the use of flame-retardant, kits, to put an end to the line short-circuiting caused by the vehicle on fire situation. Other companies in the same industry use Vantone speed limit, once the speed limit into the water, short-circuit caused by fire, burning cars abound! After looking at the front frame and then take a look at the back half of the shovel cab using thickened steel soft package design, open vision, driving comfort, debuggable soft package, cloth seats, large travel sub-speed, operating handle, distributor, easy to feel the operation, the use of noise reduction and shock absorption combination of the pad to minimize the driver’s fatigue, feel the […]

Lehman uses steel mountain brand tires, three years of ultra-long warranty, the whole series of models with standard profile steel rings, low pressure wear less, higher stability. Other brands in the same industry use ordinary rubber tires or even retreaded tires, and the quality is not guaranteed. The use of ordinary stamped steel ring, the load is explosive, the tire pressure is easy to collapse, the risk of injury is great, and the tire injury incident occurs every year. Lehman adopts the new speed ratio axle, the torque converter is faster at high speed, more powerful at low speed, and can work in low speed second gear or high speed first gear operation, saving the trouble of switching back and forth high and low speed fast, saving time and labor and fuel saving, highlighting our fuel-efficient design concept, other companies in the same industry still use the old speed ratio axle gearbox, slow speed, small driving force, And can only work at a low speed, time-consuming and costly labor and oil, so that customers are invisible waste, a lot of costs increase the cost of work. Lehman adopts the design of the upper steering cylinder, following the central principle of mechanics, the steering action is more uniform, and in the case of the steering engine is out of control, it […]

Maintenance methods for the hydraulic system of small loaders in daily use: 1、 Before working on a small loader, it is necessary to check whether all fasteners and pipe joints are loose, and whether the pipelines are deformed or damaged. 2、 Before the initial operation of the hydraulic pump of a small loader, the pump should be filled with oil and it is strictly prohibited to run it empty. 3、 When starting the hydraulic pump of a small loader, it should be connected and operated to ensure that it operates smoothly and normally without any abnormal noise before proceeding with work. 4、 If the working pressure of the distribution valve in the hydraulic system of the working device exceeds or falls below the specified value, it should be adjusted in a timely manner. 5、 After stable operation of the system, in addition to constantly observing whether there are abnormalities in oil temperature, pressure, and sound, attention should also be paid to observing the working conditions of hydraulic cylinders, hydraulic motors, directional valves, relief valves, as well as the oil leakage and vibration of the entire system.

The reasons for insufficient oil pressure in small loaders are: 1. The return valve of a small loader is damaged or malfunctioning. If the spring of the return valve of the small loader is fatigued or adjusted improperly, the mating surface between the valve seat and the steel ball is worn or blocked by dirt, and the valve is not closed tightly, the return oil will increase and the oil pressure will decrease. 2. The engine oil temperature of a small loader is too high. If the engine oil is too high, it not only accelerates the aging and deterioration of the oil, but also causes the oil to become too hot, resulting in a decrease in oil pressure. 3. The oil level of the small loader is insufficient, if the oil level is insufficient. It will reduce the pumping oil of the oil pump, resulting in a decrease in oil pressure. 4. Oil leakage from the oil radiator or pipelines of small loaders can cause a decrease in oil pressure. If the pipelines are blocked by dirt, the resistance will increase, leading to a decrease in oil flow and a decrease in oil pressure.

The reasons for insufficient oil pressure in small loaders are: 1. The return valve of a small loader is damaged or malfunctioning. If the spring of the return valve of the small loader is fatigued or adjusted improperly, the mating surface between the valve seat and the steel ball is worn or blocked by dirt, and the valve is not closed tightly, the return oil will increase and the oil pressure will decrease. 2. The engine oil temperature of a small loader is too high. If the engine oil is too high, it not only accelerates the aging and deterioration of the oil, but also causes the oil to become too hot, resulting in a decrease in oil pressure. 3. The oil level of the small loader is insufficient, if the oil level is insufficient. It will reduce the pumping oil of the oil pump, resulting in a decrease in oil pressure. 4. Oil leakage from the oil radiator or pipelines of small loaders can cause a decrease in oil pressure. If the pipelines are blocked by dirt, the resistance will increase, leading to a decrease in oil flow and a decrease in oil pressure.

The characteristic of the independent heat dissipation system of the loader is that compared to ordinary heat dissipation systems, timely maintenance is necessary for better use. The change lies in the adoption of an electronic control system for the first time, which ensures that the heat dissipation system is always in the best heat dissipation state. In a heat engine, its thermal efficiency is the highest. Loaders have a wide range of applications. It can also be used to push soil like a plow, or to level the ground, like spreading butter on bread with a knife. The operator can control the loader while driving the tractor. Lehman loader The speed control system of the Lehman loader must be maintained on time in order to be better used. Half a month of regular maintenance and half a month of regular cleaning of the transmission oil pan and transmission oil filter element; Due to the influence of high temperatures in summer, it can bring many difficulties to the use of hydraulic loaders. For example, the heart component of the entire machine, the diesel engine, is prone to wear and tear due to the increase in temperature, which reduces the viscosity and lubrication of the lubricating oil and power. This is a common malfunction. Lehman loader I empathize with the overall coordination […]

Small loaders often encounter various malfunctions during use, and there are only three reasons that can cause malfunctions. One is improper operation, one is insufficient maintenance, and the other is poor lubrication. Most malfunctions are caused by improper operation. Big data shows that due to long-term incorrect operations, most machinery will experience major and minor failures after a period of use, indirectly shortening its service life. Cleaning method for hydraulic system of small loader: 1. Regularly replace the hydraulic oil and filter of the small loader. High quality hydraulic oil contains various additives to prevent oil deterioration. But these additives will lose their effectiveness after a period of time. Therefore, regular oil changes should be made to ensure the effectiveness of additives. The filter can only absorb a limited number of dust particles and other impurities in the engine oil. For small machines, please replace the hydraulic oil tank return filter every 1000 working hours. Clean the suction filter of the hydraulic oil tank when replacing hydraulic oil to maintain system cleanliness. When replacing the hydraulic oil filter, please check if there are any metal particles or debris at the bottom of the filter. If there are copper or iron shavings, it indicates that the hydraulic pump and hydraulic motor or valve may be damaged or will be damaged. If […]

The loader uses a flow amplification steering system, which is composed of a priority type flow amplification valve and a full hydraulic steering gear. There are two cases of heavy steering, one is that the steering wheel turns heavy, the other is that the steering wheel turns flexibly, and the whole machine turns heavy. Heavy steering wheel rotation is generally caused by a failure of the pilot system. Check the pressure of the pilot system, pipe connections and pipe joints for problems. The steering wheel rotates flexibly, and the steering of the whole machine is heavy, which is usually caused by a failure of the steering system. Check whether there is any problem with the pipeline connection, the oil suction pipeline, the pressure of the steering system, and the oil cylinder. Before measuring and adjusting the system pressure, the whole machine should be parked on a flat ground, the boom should be lowered, the bucket should be leveled, and the engine should be extinguished to ensure safety. Before measuring the pilot pressure, first put the boom to the lowest position, and the bucket receives the position of the maximum retraction angle. Before measuring the steering pressure, first remove the ejector rod for the hydraulic limit. The normal pressure of the pilot is: the engine is not lower than 2.2 MPa […]

1. The first gear and reverse gear are normal, and the second gear has no driving force. First check whether the shifting handle is in place. If it is not in place, readjust it. 2. Check hydraulic oil, brake fluid, engine oil, fuel level and water tank level of small loaders; 3. Check the tire pressure, rim and bolts of important parts; 4. Check the instrument and lights of the small loader; which manufacturer of small loader is better? 5. Add grease to each hinge point; 6. Check the gap between the sub-frame and the axle seat at the hinge joint of the frame, and replace the copper gasket when it exceeds 0.7mm. Which small loader manufacturer is better

1. The diesel engine works normally, but the loader cannot walk. First check the oil limit valve and speed change pressure gauge of the transmission. If you find that there is a shortage of oil, you should add new oil, but not too much, otherwise it will cause the transmission to heat up. Then check the working device and the loader. If the working device rises and falls normally, the whole machine can be turned, but the loader cannot move, it must be caused by the damage of the variable speed pump. If the working device cannot move, the whole machine cannot be turned, and the loader cannot Walking is mostly caused by shearing of the steel plate connecting bolts of the torque converter or cracking of the elastic plate. At this time, the damaged parts must be replaced or repaired. 2. The loader can only move forward, not backward. First check whether the shifting pressure is normal. If the pressure drops when the reverse gear is engaged, it proves that the reverse gear is leaking too much. It is necessary to replace the reverse gear piston ring and the more worn friction plate, and adjust the reverse gear gap to the specified value. If the reverse gear does not reduce the pressure, it proves that the forward gear is […]

The drive axle of the loader has a large output torque, a complex structure, and is prone to failures. The causes, phenomena and treatment methods of common failures are now introduced. 1. Abnormal sound. The reason for the noise of the drive axle is more complicated. If the quality of the parts is not qualified, the main transmission assembly is not adjusted properly, and the wear is excessive, the loader will make noise during the work. (1) The noise caused by improper gear meshing clearance. For example, if the teeth with too large meshing gap collide with each other, the sound will be an unrhythmic “gawk and gawk” sound; if the meshing gap is too small, the teeth will squeeze each other, and the sound will be a continuous “cough” sound with accompanying sound. Heat; when the meshing gap is uneven, the sound is a rhythmic “hard” sound. In severe cases, the drive axle will swing. The treatment method is to remove the main transmission mechanism and re-adjust the meshing gap of the gears. (2) The sound of improper bearing clearance. If the bearing clearance is too small, the sound will be a continuous sound of “……”; when the bearing clearance is too large, a messy “ha la, ha la” sound will be emitted. The treatment method is to remove […]

1 Insufficient brake air pressure Trouble phenomenon: The brake failure caused by insufficient air pressure is manifested as the air pressure expression is less than the specified air pressure value (0.45-0.70Mpa), and the brake does not respond when the brake pedal is depressed. cause of issue: 1) The pipeline is leaking, and there is no pressure or the pressure of the gas in the gas tank is too low, which is not enough to push the afterburner pump set to produce braking force. 2) The air compressor is not working properly and cannot produce enough compressed air. 3) The one-way valve is corroded and stuck, causing inability to enter the air cylinder or slow air intake. 4) The oil drain plug of the oil-water separator is not tightened, causing serious air leakage. 5) The pressure regulating valve leaks seriously. Troubleshooting: First, check the air leakage of the pipeline, and then check the working status of the air compressor. Remove the air compressor outlet pipe and press the air outlet with your thumb. If the exhaust pressure is low, the air compressor is malfunctioning. If the air compressor is in good working condition, check the oil-water separator drain plug or pressure regulating valve to avoid bypassing, and finally check the two one-way valves in the three-way joint. If the one-way valve […]