How to deal with the excavator walking deviation, and what is the reason for the excavator walking d

1) The sealing ring of the center rotary joint is damaged

The central rotary joint is composed of two major parts, the housing and the mandrel, the mandrel is installed on the lower car body, the housing is installed on the upper car body, and the mandrel has an annular groove equal to the oil pipe. The hydraulic oil from the main valve core flows to the motor through the vertical hole in the mandrel through the housing, and the housing rotates continuously with the upper car body, and the groove on the mandrel can also be kept smooth with the oil port on the housing, and the hydraulic oil can enter and exit freely on the central joint. If the filter element of the hydraulic oil is not replaced in time, the bypass valve on the filter element may be opened, and the impurities in the oil are not filtered so that the impurities in the oil directly enter the sliding surface of the central rotary joint, so that the sealing ring on it is damaged, and the speed of the walking motor on both sides is not the same due to the pressure oil leakage on one side of the excavator when walking, and the excavator is caused to deviate from walking.

The method of elimination is to change the hydraulic oil and filter element at the same time as the oil on the center rotary joint.

2) The balance valve in the parking brake oil circuit on the side of the excavator when the dirt enters the balance valve when the excavator walks, if the dirt blocks the small hole of the balance valve, the parking brake can not be lifted, resulting in walking deviation.

Exclusion method: remove the balance valve and clean it, and no dirt can enter when disassembling and assembling;

Replace the hydraulic oil and filter elements that meet the requirements regularly.

3) Oil leakage from the safety valve of the travel motor, which will cause the pressure in the system to be too low and the rotation of the travel motor is not enough, resulting in walking deviation.

Troubleshooting: Replace the damaged travel motor safety valve. When judging, the safety valves of the left and right travel motors can be swapped to see if they are deflected when walking in the opposite direction.

4) The degree of track tension is different, if the excavator walks, the left and right sides of the track tension degree is not the same, it will also make the walking deviation.

Troubleshooting: Butter one side of the loose side so that it is as tight as the other.

5) When the excavator walks in a straight line, the plunger of the pump flow regulator of one of the pumps is stuck in a certain position, or due to serious wear and tear, internal leakage, and the system pressure can only be reached, so that the speed of the walking motor slows down, and the excavator will deviate.

Elimination method: Remove the hydraulic pump assembly from the excavator, replace the wear parts, repair the regulator, and replace the hydraulic oil and filter element.

The excavator walks weakly and deviates? It turned out that there was a problem here, and this time I learned!

First, the hydraulic pump is faulty: under normal circumstances, the excavator is the use of double pump, walking deviation is often a pump fault, the simplest way to judge is: the hydraulic pump of the two high-pressure oil pipe adjustment, if the original slow becomes faster, the original fast becomes slow, proves that there is a pump fault.

2. Oil leakage from the safety valve of the travel motor: The oil leakage of the safety valve will cause the pressure in the system to be too low, so that the speed of the driving motor is not enough, and the walking deviation will occur. The exclusion method is:

Replace damaged travel motor safety valves; When judging, the left and right travel motors can be safely swapped to see if they are deflected when walking in the opposite direction. 3. The excavation machine deviates to one side: if the spring in the main walking valve becomes soft or broken, or the valve core is stuck, it may cause the oil pressure to decrease and the walking deviation occurs.

During the inspection, the pressure of the oil circuit of the walking main valve should be measured, and the normal value is. If the travel master valve is damaged, it needs to be replaced or repaired.

1. The tension degree of the tracks on both sides is different.

This is one of the few causes of walking deviation that can be determined by visual observation. In this case, the track tension should be adjusted in time and lubricated with butter.

2. The sealing ring of the central rotary joint is aging and damaged.

Due to the impurities mixed in the hydraulic oil, the impurities enter the sliding surface of the central rotary joint, causing excessive wear of the sealing ring, reducing the sealing effect, resulting in the leakage of the hydraulic oil, and the pressure of the walking hydraulic motor on one side is reduced, resulting in walking deviation.

3. The parking brake oil circuit of one side of the track can not be unloaded.

Because the balance valve in the brake oil circuit is blocked by foreign bodies, the valve core cannot be moved, and the flow of hydraulic oil is blocked, so that the traveling hydraulic motor is continuously in the braking state and cannot rotate, resulting in walking deviation. In this case, the balancing valve should be thoroughly cleaned and foreign matter should be avoided to keep the balancing valve switched normally.

4. Oil leakage from the safety valve of the motor next to the row width of one side of the track.

The oil leakage of the safety valve leads to the low pressure in the walking pipeline, and the rotating driving force of the hydraulic motor is insufficient, resulting in walking deviation.

5. The pressure generated by the hydraulic pump is too low.

Due to the excessive wear of the hydraulic pump and the plunger jamming, the hydraulic oil leaks or the pump oil capacity is weakened, resulting in the low pressure of the entire hydraulic oil circuit, the speed of the hydraulic motor slows down, and the walking deviation.

The seal of the center slewing joint is damaged. When the user changes the oil on the center rotary joint, the hydraulic oil and the filter element can be replaced at the same time.

The central rotary joint is composed of two major parts, the housing and the mandrel, the mandrel is installed on the lower car body, the housing is installed on the upper car body, and the mandrel has an annular groove equal to the oil pipe. The hydraulic oil from the main valve core flows to the motor through the shell from the vertical hole in the mandrel, and the shell rotates continuously with the upper car body, and the groove on the mandrel can also be kept smooth with the oil port on the housing, and the hydraulic oil can enter and exit freely on the central joint.

If the filter element of the hydraulic oil is not replaced in time, the bypass valve on the filter element may be opened, and the hydraulic oil is not filtered, so that the impurities in the oil directly enter the sliding surface of the central rotary joint, so that the sealing ring on it is damaged, and the excavator is walking due to the leakage of pressure oil on one side, resulting in the speed of the walking motor on both sides is not the same, resulting in the excavator walking deviation.

There may be several reasons for the deviation of the pro-excavator: 1Improper adjustment of the bulldozer plank:

If the bulldozer plate of the excavator is not properly adjusted, it will cause the excavator to deviate; 2.Inconsistent track tightness: The inconsistent track tightness of the excavator will also lead to the excavator mistracking; 3.

Uneven wear of the track: If the track of the excavator is worn unevenly, it will also cause the excavator to deviate; 4.Improper use of joysticks:

If the lever of the excavator is used incorrectly, it will also cause the excavator to deviate. It is recommended that you go to the regular excavator maintenance station to check and find out the specific reason for the number of cherry blossoms that deviate. In addition, in the excavation operation, pay attention to the adjustment of the excavator's bulldozer plate, the tightness of the track, the wear of the front nuclear track and the use of the joystick to ensure the normal use of the excavator.

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