Is your excavator all right?

First, the engine power is enough, the operation is normal, and the machine speed is slow, mining weakness

1, the excavator hydraulic pump for piston pump, after working for a certain time, the internal hydraulic components (pump cylinder, piston, valve plate, plate, abalone turtle etc.) inevitably produce excessive wear, resulting in a large number of data leakage, the parameter is not harmonious, resulting in inadequate flow of oil temperature is too high, slow, cannot build up high so, slow to mining. For this kind of situation must be wrong, remove the hydraulic pump to the center of the company debugging, open the hydraulic pump to measure data, confirm the digging machine problem, can not continue to use the replacement of parts, repair can continue to use the accessories, re assemble the hydraulic pump, the pump valve check station debugging. The soft parameters (pressure, flow, torque, power, etc.) of each system can be matched.

2, excavator and another important hydraulic components - multi-channel distribution valve, there are main safety valve, two valve, jet valve, oil supply valve. If the safety valve set pressure is not up to the standard pressure (such as the standard pc200-3 pressure of the main valve is 32Mpa, and now the pressure is only 25MPa) leads to mining weakness, and, if the valve stem and valve hole between the gap is too large because of wear, the stem return is not complete, is a large number in diarrhea lead to lack of traffic, slow speed. The trouble with this kind of situation. Unloading manifold distribution valve, sent to the commissioning center directly to the valve calibration table debugging, re set all the safety valve pressure to the standard pressure, eliminate the gap between the valve stem and valve hole can be.

3, imported excavator hydraulic pump is equipped with pilot gear soft pump, the pump is mainly involved in the hydraulic pump variable and as the pilot oil, open multi way distribution valve stem to make its reversing. If the gear pump wear degree has not established a certain pressure or gear pump safety valve set to a certain pressure, will cause the hydraulic pump is always in the low flow state, the valve stem can not be completely reversing, this lack of traffic, slow, low pressure, weak mining. For the class of trouble, only the replacement of the pilot gear pump or reset the pilot safety valve can be.

Two, walking deviation, and the action of a handle is not ideal

Hydraulic pump is divided into front and rear pumps or left and right pumps, running deviation shows that there is a fault in the pump, the most simple judgment is: the hydraulic pump of two high pressure oil pipe swap, if the original slow leg faster, faster legs slow, it is proved that a pump failure. For this kind of problem, must remove the hydraulic pump, more pump for a pump parts, and then on the valve calibration table debugging. At the same time, it solves the problem that the handle of one handle is not ideal.

Three, engine black smoke diesel consumption increased or unable to easily flameout phenomenon

1, nest pressurization gas damage

2, some internal engine parts wear serious, interaction with the gap is too large, there are several cylinder cylinder abnormal diesel combustion is not sufficient, oil system flow and pressure standards, thus causing the engine the black smoke is serious, lack of power, high body temperature, in addition to the hydraulic pump adjusting mechanism does not work properly with the engine cause cannot achieve constant power variable, thereby causing the engine more harm car flameout phenomenon.

Four. Why is the engine cold? Why is it difficult to start the machine?

1. Plunger or discharge valve of diesel pump

2, diesel fuel flow adjustment is not standard,

3, the engine cylinder and piston clearance is too large, valve mechanism serious leakage, this phenomenon must overhaul the engine.

Five, the engine power is enough, but there is stuffy car (car) phenomenon

The hydraulic pump itself also has a certain power, if the hydraulic power is greater than the engine power, there will be stuffy car (car) phenomenon. This requires the hydraulic pump valve calibration table debugging, the hydraulic pump power down to 95% of the power of the engine can be.

Six, the refrigerator is normal, slow action when the engine, mining weakness

The problem is when hydraulic pump to non overhaul it out, the interior fittings hydraulic pump serious wear, continue to have the internal parts can cause severe wear of the hydraulic pump, to continue to use the internal parts may cause severe wear of the hydraulic pump, continue to use it may cause serious damage to the hydraulic pump. To replace the internal wear parts, reassemble the upper valve calibration table debugging, in order to restore the standard state of the hydraulic pump.

The above experience is for reference only, excavator maintenance is the most important experience, accurate judgment of fault point, to maximize maintenance.