The method of maintenance of common faults in excavator

1 filter damage

Filter is used to filter out the dust and impurities in the compressed air to prevent the material from entering the excavator's brake system. It consists of 30 filters, vacuum pads 32 and 33 composed of a fixed plug, if used for a long time, without timely maintenance, easy to make the filter wire breakage, cleaning pad damage. Therefore, in the maintenance should be carefully maintained, if damaged should be repaired or changed in time.

2, control valve shell rupture

The valve shell is made up of upper, middle and lower three parts, respectively. Since the shell is made of aluminum, if the decomposition or combination, if the demolition, installation and screw method is improper, easy to make the shell rupture. Failure in the demolition, installation screws, should be diagonal and repeatedly tightened or loosened, the shell according to the force on the surface of the alloy ring is consistent, to prevent damage due to uneven stress.

3, pressure adjustment valve adjustment air pressure is too high or too low

During normal operation, if the gas pressure in the air cylinder to 0.637MPa, lower the pressure relief pressure regulating valve, the gas cylinder pressure no longer increased. When the gas cylinder pressure is lower than 0.49MPa, it should not be a relief. This pressure adjustment can be adjusted by adjusting the screw 1 to change the compression force of the large spring 19 (tightening, gas rise; loosen, pressure reduction) to achieve, such as the adjustment of the air pressure is still not normal, there are two cases: one is the air pressure has exceeded but failed to exhaust pressure. At this point you should consider whether to run the exhaust piston 12 is blocked, as a result of O ring piston round 34 tight, the lower part of the exhaust piston spring 10 is excellent, and the normal pressure gas to push the piston operation, should be uniform grinding ring or outer ring, replace the spring adjustment. If the pressure regulating valve inside the small spring 18, tight compression thimble 8 hard drive, plug 9 axial hole blockage, can make the pressure can not be unloaded; two is not yet reached the required pressure when it began to exhaust pressure relief. This causes a regulator diaphragm leak, two is due to the small spring inside the regulator too loose (or broken), or the thimble can be promoted under low pressure, the pressure regulating valve shell holes continue to leak, causing the system pressure does not rise up. In case of this situation should be the valve on the adjustment screw 1, first adjust or replace the small spring, and then adjust the large spring. Excavator control valve malfunction _ radiator repair _ universal excavator digging machine repair

4, the safety valve adjustment pressure is not normal

The safety valve is to ensure the gas cylinder pressure is less than 0.78MPa. If the pressure exceeds 0.78MPa when the pressure relief valve remains, gas cylinder pressure will continue to rise. This may be the valve diaphragm 25 leakage, safety valve spring 16 excellent; if the pressure does not meet the requirements on the discharge pressure, the reason is that the spring is weak, the preload is not enough, the valve 26 and valve seat 27 is not sealed. At this point should be adjusted or replace the damaged parts.

5 gas, the gas cylinder back after the shutdown

In order to prevent the gas cylinder back after the shutdown, the control valve is provided with a one-way valve 29, if down to pump gas after the gas cylinder back, this failure is because one-way valve spring 28 elastic is too weak or broken and useless, should adjust or replace the spring.

To start _ excavator automatic flameout _ universal excavator repair Volvo excavator

According to the above phenomenon, analyzed the causes of global excavator start machine does not start possible causes: excavator control valve malfunction _ radiator repair _ universal excavator digging machine repair

1, the battery charging is obviously insufficient; to start digging machine machine does not start

2, battery connector loose; to start digging machine machine does not start

3, the battery ground lead to loose; start digging machine machine does not start

4, start circuit not lead to start the machine does not start digging machine;

5, an armature starter lead to adhesion; do not start digging machine

6, start the machine itself to start digging machine fault; do not start

7, starting machine drive gear and engine flywheel ring gear ring;

8, the starter drive gear and bearing adhesion; lead to start machine start digging machine

9, start the power machine with fixed engine to start machine start digging machine;

Exclusion by excavators troubleshooting, step-by-step troubleshooting, first check the hydraulic system of the excavator, to check for other local fault.

Basic steps of excavator operation and maintenance

The main steps of the excavator operation:

1 excavator is a large economy into fixed assets, in order to improve its service life to get a greater economic benefits, equipment must be set, set machine, fixed position, clear responsibilities. Must be transferred, shall carry out the equipment.

2 excavator into the construction site, the driver should first observe the working surface geology and environment, the excavator can not have obstacles in the radius of rotation, so as not to cause damage to the vehicle.

3 after the launch, to prohibit any person standing in the bucket shovel arm and track, to ensure safety in production.

4 excavator at work, to prohibit any person in the radius of gyration within or below the bucket to stay or walk, non driving personnel shall not enter the cab touch touch, not with training driver, in order to avoid damage to electrical equipment.

5 excavators in the move, the driver should observe and whistle, after moving, avoid mechanical accidents caused by someone, move the position after the rotation radius of the excavator to ensure space without any obstacles, no violation operation.