Which is better for Komatsu to adjust PC valve or LS valve (Komatsu PC200 distribution valve assembly)

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List of contents for this article:

• 1、What are the functional characteristics of Komatsu PC200LS valve operation?
• 2、The Komatsu 240-8 pump was damaged and choked the car. It was still choked after maintenance. The cleaning failure remained after the multi-way valve was disassembled. Cleaning electricity...
• 3、How to adjust the Komatsu PC220 -8 excavator to the fastest loading?
• 4、How to adjust Komatsu 130pc valve and ls valve
• 5、. Is it better for Komatsu to adjust the flow rate and adjust the Pc valve or the Ls valve?

What are the functional characteristics of Komatsu PC200LS valve operation?

1. Komatsu PC200LS valve operation: When the control valve is placed in the neutral position, the spool (6) is pushed to the right, and the oil port (C) and the oil port (D) will be connected. Pump pressure (PP) is conducted from the oil port (K) to the large diameter end. The same pump pressure (PP) is conducted from the oil port (J) to the small diameter end. Depending on the difference in area on the servo piston (12), pressure will enter, causing the swashplate angle to be minimized.

2. Function during independent operation and at maximum load pressure (if the load pressure is higher than other working devices during combined operation): The pressure compensation valve serves as a load check valve. If the pump pressure (LS pressure) is less than the load at the port (c), the reciprocating valve (3) of the pressure compensating valve piston (4) communicates the spring chamber (E) with the port (C). The force of spring (5) operates piston (4) and valve (2) in the closing direction.

3. EC valve (for LS spool). Function of Komatsu PC200 combining-diverter valve: Combine pressure oil discharged from the two pumps (P1) and (P2) or divert (to each control valve bank). Combine and divert LS oil line pressure. Komatsu PC200 combining-diverter valve operation: Since the selector signal (IS1) is turned off, the output pressure from the EPC valve is 0kg/cm2.

The Komatsu 240-8 pump was damaged and choked the car. It was still choked after maintenance. The cleaning failure remained after the multi-way valve was disassembled. Cleaning electricity...

According to what you said, the solenoid valve you cleaned should be the PC-EPC solenoid valve on the main pump. After cleaning, the fault disappeared. The pressure at first reaches 35kg/cm2 is normal, which proves that the problem of slow action of the stick is not caused by the main pump. While you say that the stick is slow, what is the pressure on the stick to dig? Whether it is within the range of 350 plus or minus 10.

The Komatsu 240-8 excavator has nothing to do with the multi-way valve. The reasons for the car hold-up failure are as follows: the diesel used in the excavator is of the wrong grade, the Tianliang diesel has a high viscosity, the oil supply path cannot work normally, and the oil supply is insufficient. Engine load or engine speed power is insufficient. The voltage value of the excavator PRV solenoid valve is insufficient. The excavator pump pressure is incorrect. Excavator engine valve clearance is too large or too small.

The inspection process for the stagnation and flameout failure of Komatsu PC240LC-8 excavator: First, replace the diesel filter element, the symptoms remain the same. Inspection of the manual oil pump found that the external leakage was serious, and the failure in the test run of replacing the novice oil pump still existed. Check the fuel supply system, replace all fuel lines invalid. Cleaning the fuel tank and oil suction filter is still ineffective. Failure cause: After inspection, it is found that there is a very small crack at the contact surface between the filter element seat and the fuel filter element, which leads to the above failure.

The reasons for Komatsu excavator holding car may be the following: solenoid valve failure: solenoid valve as a key component of the excavator hydraulic system, if a failure occurs, may lead to abnormal hydraulic system pressure, resulting in holding car phenomenon. Hydraulic pump failure: Especially for the hydraulic pump that controls the side of the excavator, if there is wear, such as pump head or swashplate failure, it will lead to insufficient hydraulic pressure, which will cause congestion.

The phenomenon of Komatsu excavators being stuck and unable to stall is usually related to the fuel oil circuit, electrical system and hydraulic system. First, check whether the fuel oil circuit is normal to make sure there is no fuel blockage. At the same time, check whether the electrical system is operating normally and eliminate the possibility of electrical faults. In addition, ensure that the pressure of the hydraulic system is normal. If everything is normal, you can initially judge that the hydraulic main pump may be faulty.

How to adjust the Komatsu PC220 -8 excavator to the fastest loading?

1. In order to make the Komatsu PC220 -8 excavator load faster, it is first necessary to adjust the working mode to P mode, which can improve the operating efficiency of the equipment. If you find that the speed is slower now than before, it is recommended to contact the service personnel for inspection. When the engine allows, they can adjust the LS valve, which helps improve loading speed. The process of adjusting the LS valve requires professional personnel because the LS valve is one of the key components in controlling the hydraulic system.

2. If you want the excavator to load and rotate quickly, you need to start from many aspects such as operating skills and equipment status. Operating skills: During operation, the rotating movement of the excavator must be accurately controlled. After the bucket is filled with materials, predict the direction and angle of rotation in advance, and use the inertia of the excavator to smoothly and quickly turn to the truck compartment. At the same time, the movement of the operating handle should be smooth and decisive to avoid unnecessary shaking and pause and reduce time waste during the rotation process.

3. The fastest method to load an excavator mainly depends on the operating skills, the cooperation between the excavator and the loader, and the specific conditions of the operating environment. The following is a universally applicable and efficient excavator loading method: First, ensure that the excavator is in good working condition and conduct a comprehensive evaluation of the working environment. This includes checking the condition of the excavator's hydraulic system, buckets and arms, as well as understanding the terrain, soil conditions and space limitations of the job site.

4. Sit on the platform. Don't use the bottom of the truck's cargo box. Digging in front and lifting the boom a little and then letting go. This is the fastest way. If you have a fast boom, the car of 21 square meters will drive more than 10 cars per hour. There is also one trick that they call 45 degrees. Do you understand? You can't stop your hands by doing a compound action. How much is the stroke of each action open, and increase the amount of pump oil allocated to the specified action to get faster. Use the same throttle so that others can't speed you up.

How to adjust Komatsu 130pc valve and ls valve

The operating steps are as follows: Loosen all the relief valve levers of the main valve. Adjust the relief valve spring of the main valve to the softest state. Adjust the spring pressure of the main valve to the maximum, and the spring of the relief valve is the hardest. Adjust the relief valve spring of the LS valve to the softest state. Adjust the relief valve spring of the main valve again to maximize its compression, and adjust the relief valve spring of the main valve to the softest state.

Positioning points-According to the illustration of Komatsu PC130 -8 maintenance manual, this valve is usually integrated into the second unit of the multi-way valve set. It is recommended to use a marker to mark the direction of each oil pipe when disassembling the old valve to prevent erroneous connections. The installation base surface must be flat, and the flatness deviation must not exceed 0.05mm.

The steps for adjusting the idle speed of the Komatsu 130-8 are as follows. The first thing to do is to make the engine run hot, so as to ensure the accuracy of adjustment. Open the engine cover and find the throttle link, which is usually located on the front of the engine and connected to the accelerator pedal. Find the idle speed adjustment screw, which is located on the fuel pump on the rear side of the engine, and use the adjustment screw to change the volume of the fuel pump to change the idle speed of the engine.

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. Is it better for Komatsu to adjust the flow rate and adjust the Pc valve or the Ls valve?

The pc valve controls the flow rate of the main pump according to computer instructions, thereby controlling the power of the main pump. Of course, the ls valve is better.

The operating steps are as follows: Loosen all the relief valve levers of the main valve. Adjust the relief valve spring of the main valve to the softest state. Adjust the spring pressure of the main valve to the maximum, and the spring of the relief valve is the hardest. Adjust the relief valve spring of the LS valve to the softest state. Adjust the relief valve spring of the main valve again to maximize its compression, and adjust the relief valve spring of the main valve to the softest state.

The process of adjusting the LS valve requires professional personnel because the LS valve is one of the key components in controlling the hydraulic system. The service personnel will adjust the position of the LS valve based on the actual operating conditions of the equipment to ensure that the hydraulic system can work more efficiently. The advantage of this is that digging, lifting and rotating operations can be better controlled, thereby increasing loading speed.

According to what you said, the solenoid valve you cleaned should be the PC-EPC solenoid valve on the main pump. After cleaning, the fault disappeared. The pressure at first reaches 35kg/cm2 is normal, which proves that the problem of slow action of the stick is not caused by the main pump. While you say that the stick is slow, what is the pressure on the stick to dig? Whether it is within the range of 350 plus or minus 10.

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