Komatsu PC400-8 can not brake

Komatsu excavator repair service team, with excellent maintenance technology, professional solutions, fast response speed, always on call, as long as you have any needs, a phone call, in the wind and rain, they are always ready! Today to tell about Komatsu excavation The machine can not be used to rotate the brakes.

It is very dangerous to stop the excavator during the rotation process. The following reasons can cause the rotating brake to drift.

1. The brake motor brake pad wears too much.

2. The internal distribution plate of the swing motor is worn.

3. The internal and reverse oil isolation seal of the rotary motor is damaged.

4, rotating the relief valve to prevent the reverse valve wear

The theory must be combined with the practice of production capacity to generate true knowledge, the following will share with you a case of Komatsu PC400-8 rotating brakes can not help the maintenance case, I hope to help you.

Model: Komatsu 400-8

Years: 2010

Engineering: Coal Mine

Troubleshooting steps:

1. Test the excavator spare parts. When the machine is working for a period of time, operate the rotary operation handle. When the hand is released, the amount of rotation drift is too large.

2. Overflow operation on the machine, the front and rear pump pressure is: 115kg/cm2, 114km/cm2 (low pump pressure).

3. Check the slewing lock pilot pressure is normal, remove the safety valve after cleaning, re-install, the test machine fault still exists.

Decompose the safety valve and find that there is a small rubber skin inside the safety valve to clean the debris cleaning safety valve.

4. The test Komatsu spare parts failure disappears and the machine work returns to normal. The front and rear pump pressures are 294kg/cm2 and 293km/cm2 (normal) respectively.

Inspection results and disposal:

The small piece of rubber causes the safety valve to be stuck, and the amount of rotation drift is too large. After the safety valve is disassembled and cleaned, the test machine is installed normally.

When encountering a fault, carefully observe the components related to the fault phenomenon, and small problems cause a big phenomenon.

Shandong Jinyao has always been committed to solving customer problems quickly, encountering problems that need urgent treatment, and strive to rush to the service site to solve problems for customers.