1、 Reasons for oil leakage in the distribution valve of CAT 336D excavator Distribution valve oil leakage refers to the leakage of engine oil from the distribution valve due to aging, wear, or damage of the sealing components during operation. The main reasons are: 1. The seal is aging, losing elasticity, and cannot effectively seal the distribution valve; 2. Poor friction or wear, resulting in poor sealing between the distribution valve and its sealing surface; 3. Insufficient air pressure or excessive lateral force increases the workload of the distribution valve, causing leakage. 2、 Solution to oil leakage in the distribution valve of Caterpillar 336D excavator 1. Replace the seal Usually, simply replacing the seal of the distribution valve can solve the oil leakage problem. This solution is relatively simple and easy to implement, and is suitable for situations where the leakage of the distribution valve is relatively minor. 2. Install leak proof gaskets For severely leaking distribution valves, in addition to replacing the seal, a layer of leak proof gasket can be pressed onto the seal to strengthen the seal and further prevent oil leakage. The selection of gaskets should be based on the specifications and models of the distribution……

In recent years, with the development of electro-hydraulic control technology, electronic control systems have become a component of electronic load sensing control systems and have been widely used in the field of construction machinery in developed countries. The various series of track type hydraulic excavators from Komatsu are widely used in the engineering field in China, among which some models such as Komatsu 200 excavator and PC120-6 are equipped with electronic control systems. This article systematically introduces the structure, principle, and adjustment of Komatsu's electronic control system, and analyzes its common faults to help understand such systems. 1. Structure, Principle, and Adjustment of Electronic Control System The Komatsu electronic control system has data information transmission with other control systems but is relatively independent. The hardware system includes left and right electronic control levers, control device ECU, and pilot control proportional valve. 1.1 System Structure (1) Joystick. The joystick is a resistance type electronic control joystick, with a structure of 2 coaxial connected potential sensors on each axis X and Y, which serve as position signals for forward and reverse operation of each axis. Each joystick has 4 analog signal outputs, mainly outputting position command signals for the 4 operating positions……

Caterpillar 336D excavator alarm oil pressure electrical system malfunction 1. The battery is low, so it is necessary to charge the battery in a timely manner, check the battery liquid level, and replenish the electrolyte to the specified height in a timely manner. If the battery is found to be aging and charging poorly, it should be replaced, and attention should be paid to the daily maintenance of the battery, so as not to keep it in a state of low power frequently. 2. Repair or replace the starter motor due to malfunction. 3. Repair or replace the generator due to malfunction. 4. Check the circuit for faults and repair it. Caterpillar 336D used excavator engine oil circuit failure Under the suction effect of the fuel transfer pump or fuel injection pump, the fuel in the low-pressure oil circuit is sent from the fuel tank to the high-pressure pump through the low-pressure oil circuit. If the low-pressure oil circuit is not tightly sealed or the oil level in the fuel tank is too low, and the vehicle is parked and driven tilted, air will take the opportunity to enter the oil circuit; If the temperature is high and the fuel……

Common causes of engine failure to start on CAT 336D excavator: 1. The fuel injector is damaged. 2. The fuel injection pump coupling is damaged. 3. The flywheel ring gear is damaged. 4. The timing gear or timing belt is damaged. Detailed analysis of the cause of the failure of the Caterpillar 336D used excavator engine to start: 1. The fuel injector is damaged. The function of the fuel injector is to automatically advance the fuel injection angle as the engine speed increases, in order to meet the optimal fuel injection time requirements of the combustion system. Therefore, if this component is damaged, it may cause the engine to completely fail to start. 2. The fuel injection pump coupling is damaged. The coupling or timing gear of the fuel injection pump is damaged, and everything is normal when the engine is started, but there is no oil in the high-pressure fuel pipe of the fuel injection pump. This type of fault is very easy to diagnose for engines with external fuel injection pumps, but it is relatively difficult to diagnose such faults for engines with relatively concealed high-pressure pump installations such as V-type engines. 3. The flywheel ring gear is……

1、 Insufficient engine power 1. Engine aging: With the increase of usage time, the internal parts of the engine wear severely, resulting in a decrease in power and an increase in fuel consumption. 2. Air filter blockage: Air filter blockage can affect air circulation, leading to insufficient engine intake, incomplete combustion, and increased fuel consumption. 2、 Hydraulic system malfunction 1. High hydraulic oil temperature: High hydraulic oil temperature can reduce the efficiency of the hydraulic system, and the engine needs to consume more fuel to maintain the normal operation of the hydraulic system. 2. Hydraulic pump failure: Hydraulic pump failure can cause insufficient pressure in the hydraulic system, and the engine needs to consume more fuel to replenish pressure. 3、 Fuel system malfunction 1. Fuel pipeline blockage: Fuel pipeline blockage can lead to poor fuel supply, engine malfunction, and increased fuel consumption. 2. Fuel filter blockage: Fuel filter blockage can affect the cleanliness of the fuel, causing the engine to malfunction and increasing fuel consumption. 4、 Other reasons 1. Improper operation: Improper operation by the driver can lead to excessive engine load and increased fuel consumption. 2. Improper maintenance: Improper maintenance of the engine and hydraulic system can increase the……

The reasons for the malfunction of the starting motor of the CAT 336 excavator may include the following: Insufficient battery power or virtual or disconnected starting circuit: Insufficient battery power or virtual or disconnected starting circuit can cause the starter motor to malfunction. Starter damage or starter gear damage: Starter damage or starter gear damage can cause the starter motor to fail to start. Low ambient temperature: In low temperature environments, the starter motor may not function properly due to the low temperature Poor contact of electromagnetic switch contacts, damage to one-way teeth, and flywheel teeth: These issues can cause the starter motor to fail to start properly. Short circuit in the stator winding of the starter motor and damage to the commutator: These issues can cause the starter motor to malfunction. Severe brush wear and poor contact: Severe brush wear or poor contact can affect the normal starting of the starter motor. Severe wear of motor bearings or uneven assembly axis: These issues can cause the starter motor to malfunction ? The methods to solve the starting motor fault of CAT 336 excavator include: https://www.lh-usedexcavator.com Check battery power and starting circuit: Ensure that the battery power is sufficient and the……

1.Poor fuel atomization Poor fuel atomization is one of the common faults of the injector assembly of the CAT 336D excavator, which is manifested by the decrease of diesel engine power, emission of black smoke, and abnormal sound of the machine operation. This fault is mainly caused by the following factors: 1. **Insufficient fuel injection pressure**: The working pressure of the injector is the key to ensure sufficient fuel atomization. When the fuel injection pump is worn, the pressure regulating spring fails or the fuel filter is blocked, the fuel injection pressure will drop, which will affect the atomization effect of the fuel. 2. **The spray hole is worn and carbonized**: During long-term use, impurities and carbon deposits in the fuel will gradually clog or wear the spray hole, causing the diameter of the spray hole to become larger, and the fuel cannot form an ideal mist, but is sprayed in large droplets, reducing the combustion efficiency. 3. **The spring end face is worn or the elastic force is weakened**: The return spring inside the injector is responsible for quickly resetting the needle valve after fuel injection. If the spring end face is worn or the elastic force is weakened,……

The reasons for the slow walking speed of the CAT 320 excavator may include the following: Engine problem: Insufficient engine power or malfunction may cause slow walking speed. Check if the power output of the engine is normal, and repair or replace damaged components if necessary. Hydraulic system problem: Insufficient pressure or leakage in the hydraulic system can cause slow walking speed. Check the pressure and flow rate of the hydraulic system to ensure that the hydraulic oil is clean and the system is well sealed. Walking motor problem: Walking motor failure or performance degradation can also affect walking speed. Check the operation of the motor and repair or replace it if necessary. Control system issue: Electronic control system malfunction may result in inaccurate walking speed control. Check and repair faults in the control system to ensure accurate signal transmission. Solution to slow walking speed of CAT 320D: Check and repair the engine of the Caterpillar 320D used excavator: Ensure that the engine is working properly, and repair or replace damaged components if necessary. Check the hydraulic system: Ensure that the pressure and flow of the hydraulic system are normal, inspect and repair any leaks, and keep the hydraulic oil……

1. Aging or damage of hydraulic pump seals for Caterpillar 320D excavator: Seals of hydraulic pumps, such as oil seals and gaskets, may lose their sealing performance due to aging, wear, or improper installation during long-term use, leading to oil leakage. 2. Installation issues: During installation or maintenance, if the fastening bolts are not tightened correctly or the seals are not placed correctly, it may cause oil leakage. 3. Material defects of Caterpillar 320D excavator: If there are defects in the material of the hydraulic pump base or its connecting components, such as casting defects, poor welding, etc., it may also become a hidden danger of oil leakage 4. External impact: Excavators may be subjected to various external impacts during operation, causing deformation of the hydraulic pump base or damage to the seals, which can lead to oil leakage. 5. Design defects: The design of the hydraulic pump base may have defects, such as unreasonable sealing structure, improper arrangement of oil passages, etc., which may increase the risk of oil leakage. The source of the information is: https://www.lh-usedexcavator.com/ ?

The phenomenon of oil burning in the engine of the Komatsu pc200 excavator is one of the common excavator faults. Here, I will analyze the causes of oil burning in the Komatsu excavator engine and provide maintenance solutions. I hope it will be helpful for everyone to deal with such faults. The reasons for excavator oil burning are as follows: 1. During excavator operation, blue black smoke is emitted from the exhaust, and the observed oil consumption is also higher than usual, indicating that the excavator is burning oil, which may be caused by wear of piston rings, large valve clearances, large valve guide clearances, incorrect piston installation, and other reasons. 2. The clearance between the cylinder liner and the piston is too large, or the piston oil ring is stuck or broken. 3. If the phenomenon of burning engine oil is accompanied by dripping oil from the exhaust, it is likely caused by severe wear or breakage of the piston ring. 4. Burning engine oil, if the exhaust is not very severe, it may be caused by poor sealing of the turbocharger. At this time, it is recommended to remove the pipes at both ends of the turbocharger to……

Use a screwdriver or wrench to unscrew any of the exhaust screws on both sides of the fuel injection pump of the CAT 320D excavator several times, and manually press the hand pump until the diesel is continuously and smoothly discharged without any bubbles making a "squeaking" sound. Then tighten the air release screw and press the hand oil pump rod back to its original position. If you don't have a suitable screwdriver or wrench to open the air release screw on the fuel injection pump while driving, you can first unscrew the hand oil pump, loosen any pipe joint between the diesel filter and the fuel injection pump, and then repeatedly press the hand oil pump until a smooth flow of bubbles is discharged from the joint. Then, tighten the joint while removing the pressure on the hand oil pump, and then press the hand oil pump back to its original position. If there is no wrench available to loosen the small joint of the pipeline, the manual oil pump can be repeatedly depressurized until the pressure in the low-pressure oil circuit from the fuel delivery pump to the fuel injection pump is high enough. The fuel will "squeak"……

Check the spindle oil seal: Damaged or aged spindle oil seals are one of the main causes of oil leakage. If the oil seal is found to be damaged, it needs to be replaced in a timely manner. In addition, wear at the end of the spindle may also lead to poor oil seal sealing, and it is necessary to inspect and repair the wear issue at the end of the spindle. Lubrication management of Komatsu pc200 excavator: Poor lubrication can also cause hydraulic pump oil leakage. Ensure that the hydraulic system has sufficient lubricating oil and regularly check the amount and quality of lubricating oil to ensure good lubrication effect. Check the seal: The material, elasticity, and wear resistance of the seal have a significant impact on the sealing effect. If the sealing material is poor or the mechanical strength is low, it is easy to cause leakage. Check the quality of the seals and replace them if necessary. Adjusting system pressure: Excessive system pressure or insufficient pre compression of seals can also cause leaks. Adjust the system pressure appropriately to ensure that the seals are working in the correct pre compressed state. Check the oil temperature and viscosity:……

Hitachi 200 excavator fault code： 11100-2 engine speed abnormality 11101-3 Engine Speed Control Knob Sensor High Voltage Abnormal 11101-4 Engine Speed Control Knob Sensor Low Pressure Abnormal 11200-3 Pump 1 Oil Delivery Pressure Sensor High Pressure Abnormal 11200-4 Pump 1 Oil Delivery Pressure Sensor Low Pressure Abnormal 11202-3 Pump 2 Oil Delivery Pressure Sensor High Pressure Abnormal 11202-4 Pump 2 Oil Delivery Pressure Sensor Low Pressure Abnormal 11206-3 Pump 1 Pump Control Pressure Sensor High Pressure Abnormal 11208-4 Pump 2 Pump Control Pressure Sensor Low High Pressure Abnormal 11301-3 Rotary Pilot Pressure Sensor High Pressure Abnormal 11301-4 Rotary Pilot Pressure Sensor Low Pressure Abnormal Example: Fault code: 11301-4 Fault problem: Abnormal low pressure of the rotary pilot pressure sensor Fault cause: Voltage less than 0.25V Affected control: (1) Stick regeneration control (2) Attachment flow control (3) Rotation alarm control resolvent: (1) The combination of boom retraction and rotation operation results in slow boom speed (2) If the machine is equipped with a rotary alarm and the rotary alarm continues to sound when it is activated The article is sourced from: https://www.lh-usedexcavator.com/

There may be several reasons why the CAT 336 excavator can not rotate the brake: 1.There is air in the brake fluid pipe: brake fluid is the medium of the brake system transmission, if there is air in the pipe, the brake fluid under high pressure is not enough power, although there is still a certain amount of braking force, but significantly weakened. At this time should be timely to the maintenance shop for brake system exhaust processing. 2. Brake fluid has not been replaced for a long time: brake fluid has strong hydrophilicity and easily absorbs moisture in the air. If it is not replaced in time, it will contain too many impurities and water, which will affect the transmission of braking power. 3. Oil leaks or soft brakes: Generally speaking, oil leaks from the brake master cylinder or brake pipe will cause the brakes to become soft. If the brake material is too soft, the high temperature stability will be poor, which will also lead to soft brakes. https://www.lh-usedexcavator.com

Check if the coolant level has significantly decreased, and if so, add an appropriate amount. Or check if the coolant has deteriorated. If it deteriorates, it is necessary to clean the waterway and replace the antifreeze. Next is to check the oil level of the used 320D excavator. If the oil level is too low, it needs to be added or replaced in a timely manner. Next, check if there are any foreign objects blocking the water radiator of the excavator and if the radiator air duct is blocked. If there is any blockage, it must be completely cleaned. Then it is necessary to check whether the fan blades of the excavator are deformed and whether the air volume of the fan is too low. If so, it is recommended to replace the fan or adjust the belt. Check if there is a short circuit or open circuit in the water temperature sensor and circuit of the Caterpillar 320D used excavator. If there is, it is recommended to contact a professional for repair. Disassemble and inspect the thermostat, place it in hot water, and observe the opening of the thermostat. If it cannot be opened normally, replace the thermostat.

1.Fault in the overflow valve of the 320 excavator motor: The overflow valve is an important component in the walking system. If it malfunctions, it may cause power transmission to be blocked, affecting the force of unilateral walking. 2. Damage to the central rotary joint: If the oil seal of the central rotary joint is worn or broken, it may cause insufficient lubrication, affecting the smooth operation of the moving parts and resulting in unilateral walking failure. 3. Damage to the walking motor: If there is a malfunction in the mechanical structure inside the walking motor, such as wear, jamming, or damage, it may cause the excavator to not move on one side. 4. Track adjustment issue: If the wear on both sides of the track is not consistent, it can lead to uneven walking, which may be caused by improper track adjustment. Troubleshooting and repair steps Check the vibration and noise of the hydraulic pump of the Caterpillar 320 used excavator: First, check whether the vibration and noise of the relevant hydraulic pump are normal. If they are normal, it means that the mechanical part of the hydraulic pump may not be significantly damaged. 2. Check the return oil……

The engine is the heart of construction machinery and plays a vital role in the operation of the machinery. As one of the models, the Carter 336D engine has been widely used in construction machinery such as excavators. This article will introduce the characteristics, advantages, and application scenarios of the Carter 336D engine to help readers better understand and apply this excellent engine. 1. Characteristics of the Carter 336D engine The Carter 336D engine is a four-stroke, in-line, water-cooled, turbocharged diesel engine with a cylinder diameter of 112mm, a stroke of 140mm, and a total displacement of 6.4L. The biggest feature of this engine is its high power, high torque, good reliability, and ability to operate for a long time in harsh environments. In addition, the engine also uses advanced fuel injection technology, which can effectively reduce fuel consumption and emissions and has good environmental performance. 2. Advantages of the Cat 336D excavator engine 1. High power: The Carter 336D engine uses advanced turbocharging technology, which can increase the intake pressure, increase the amount of air entering the cylinder, and thus make the engine more powerful. 2. High torque: Due to the in-line cylinder bore and stroke design, the Carter 336D engine……

The walking part of the excavator is composed of sprockets, supporting wheels, driving wheels and rail chain links. After running for a certain period of time, these parts will show a certain degree of wear. However, if you pay attention to daily maintenance and take a little time to do proper maintenance, you can avoid "major surgery on the excavator's legs" in the future. It saves you considerable maintenance funds and can also avoid delays in construction caused by maintenance. How to reduce the wear of the excavator track when walking The first point: If you walk on the inclined ground repeatedly for a long time and turn suddenly, the side of the rail chain link will contact the side of the driving wheel and the guide wheel, thereby increasing the degree of wear. Therefore, you should avoid walking on the inclined area and turning suddenly as much as possible. Straight travel and large turns can effectively prevent wear. Second point: If the machine is used while some of the sprockets and track rollers cannot operate, it may cause the rollers to wear out and the rail chain links to wear out. If a roller that cannot operate is found,……

Digging is one of the main tasks of an excavator. Today, I will share with you 5 tips on how to improve work efficiency during digging. used Excavator loading First, when digging, the arm cylinder is generally used as the main force, and the boom cylinder is used as the auxiliary force. The angle of the bucket teeth should be adjusted according to the travel trajectory of the arm. The bucket teeth must be "inserted" into the soil, not "slapped" into the soil. After inserting to a certain depth, the bucket is hooked and the arm is lifted. In this way, it is a perfect digging action. Second, if you are digging along the edge of the soil and the soil is relatively hard, it is best to use only two or three bucket teeth to cut the soil first, and then dig it up together. This can effectively improve the overall work efficiency. Third, when loading or other operations that require efficiency, each bucket of digging must be filled. After lifting the bucket, try to stop all other actions and only do the rotation action with all your strength. In this way, the rotation action speed will be the fastest…….

Improper or incorrect operation: Incorrect operation may cause white smoke from the engine of the Caterpillar 320D excavator. Fuel supply issue: Poor fuel supply or poor fuel quality may result in white smoke emissions. Coolant temperature circuit malfunction: A malfunction in the coolant temperature sensor or circuit may result in white smoke emission. Hydraulic electronic control unit injector failure: Injector failure can affect combustion and cause white smoke. Combustion malfunction: Insufficient combustion or low external temperature may result in white smoke emission. Air inlet heater malfunction: Air inlet heater malfunction may result in white smoke emission. High air intake resistance: The presence of resistance in the air intake system may result in white smoke emissions. Bent connecting rod or damaged cylinder liner: After the machine tilts, bent connecting rod or damaged cylinder liner may cause white smoke to be emitted. resolvent Formal operation: Ensure to follow standard operating procedures, especially in cold environments. Check fuel supply: Check fuel quality, fuel pressure, and fuel system to ensure smooth fuel supply. Check the coolant temperature circuit: Use ET to check the coolant temperature sensor and circuit to ensure normal operation. Check the fuel injector: Ensure that the hydraulic electronic controlled single unit……

The main reasons for oil leakage in the distribution valve of the CAT 320 excavator include the following aspects: Aging or damage of seals: Long term use and the impact of the working environment can cause seals to lose their elasticity and fail to seal effectively, leading to oil leakage. Hydraulic oil pollution: Hydraulic oil contains impurities, particles, etc., which may cause wear on the valve core and seat when flowing through the distribution valve, damage the sealing surface, and lead to oil leakage. Improper installation: For example, the torque of the fastening bolts does not meet the requirements, or the installation position of the seals is incorrect, which may cause oil leakage. External influence: The severe vibration and impact of the excavator during operation may cause the components of the distribution valve to loosen, leading to oil leakage. For these reasons, the following effective maintenance methods can be adopted: Replace seals: In case of aging or damage to seals, it is necessary to replace them with new ones in a timely manner and ensure that their quality is reliable and meets the working requirements of the excavator. Replace hydraulic oil and clean the system: If oil leakage is caused……

Caterpillar 320 excavator power failure: The power supply to the display screen may have malfunctioned, causing the display screen to malfunction. Usually, the display screen may need to replace the power supply after several years of use to continue working. The problem can be solved by replacing or repairing the power supply. Poor wiring connection of Caterpillar 320 excavator: The wiring connecting the display screen may be misconnected or have poor contact, resulting in signal transmission interruption and the display screen not working properly. The solution is to check the wiring connections and ensure correct wiring for proper signal transmission. Caterpillar 320 excavator energy-saving mode: Caterpillar excavator may have enabled energy-saving mode, which will darken or turn off the display screen to reduce energy consumption. You can turn off the energy-saving mode in the settings menu to solve this problem. Caterpillar 320 excavator battery issue: If the battery is low or has problems, it may also cause the display screen to not light up. You can check the battery voltage by using a multimeter. If the battery is low or needs to be replaced, it should be replaced in a timely manner. Specific steps to solve the problem of the……

1、 The reason for high hydraulic oil temperature of CAT 320 excavator The main reasons for the high temperature of hydraulic oil in Carter excavator are as follows: 1. Long continuous working hours; 2. Poor working conditions, such as high temperature, high humidity, and high dust; 3. Wear and tear of hydraulic components such as hydraulic oil pumps and cylinders; 4. Hydraulic oil contamination or non-compliance. 2、 Three simple steps to reduce hydraulic oil temperature 1. Replace hydraulic oil: When the temperature of the hydraulic oil is too high, it can be considered to replace the hydraulic oil. Choosing the appropriate hydraulic oil can effectively reduce the temperature of the hydraulic oil. 2. Regularly clean the hydraulic system: Regularly cleaning the hydraulic system can effectively reduce the pollution level of hydraulic oil, reduce the wear of hydraulic components, and thus lower the temperature of hydraulic oil. 3. Install a thermostat: Installing a thermostat can effectively reduce the temperature of hydraulic oil and provide better protection for the hydraulic system. 3、 Summary The high temperature of hydraulic oil in Carter's second-hand excavator can cause problems such as hydraulic system failure and damage to hydraulic components, seriously affecting work efficiency and safety…….

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