The excavator slewing motor powers the slewing movement. Simply put, the excavator is operated by a swivel device with a 360°working range. The structure of the excavator is mainly divided into the on-board system (cab, working device, engine, etc.), the getting-off system (mainly bearing and walking), the middle connection function is the slewing support (large ring gear); The function is to mesh with the large ring gear of the slewing ring, and drive the upper vehicle system to make the rotary motion, so that the entire working device can work in the 360° range.


Fault diagnosis and elimination of excavator swing device:

1. Check the hydraulic motor safety valve and adjust the safety valve at the lower part of the hydraulic motor control valve. Unscrew the safety valve nut and use the inner hexagon wrench to rotate the adjusting screw plug to change the pressure by 2.345MPa per revolution. Therefore, the pressure gauge test should be 9.8 MPa. If it is lower than 9.8 MPa, it means that the "crawling" fault is mostly caused by the set pressure of the hydraulic motor being too low.

2. Check the hydraulic motor and mechanical transmission part. If the test hydraulic motor safety valve setting pressure is 9.8MPs, it means that the “crawling” is excessive mechanical friction resistance of the hydraulic motor to the rotary platform. Touch the hydraulic motor casing by hand. If there is a hot feeling, it means that the hydraulic motor has too much friction, which proves that it is the cause of the "crawling" failure and should be excluded.

3. Check if the hydraulic oil is invalid and the amount of oil is sufficient. If the hydraulic oil is too dirty or does not meet the standard, the hydraulic system will be faulty.

4.If the hydraulic motor temperature is normal, you can manually mold the temperature of the gearbox and turntable, or observe the lubrication. If the touch has a higher temperature and the lubrication is also poor, it indicates that most of the "crawling" faults are caused, that is, the friction resistance is too large and should be excluded.


The excavator slewing motor is an important part of the excavator. If the slewing motor is damaged, the excavator will not be able to rotate and will not work. Buy excavator swing motor form Tonkee with best price, then you can get fully technical support.


Tonkee offers high quality excavator swing motor(swing device) with professional technical and after-sales support service with more than 10 years.


Frequently asked questions：

1.Is this swing motor can use for my excavator?
Please check the suitable list if this swing motor can be use. if not inside, you can contact us.

2.How is the quality of this swing motor?
There is no doubt with the quantity, our technical provide fully support.

3.How to replace swing motor(installation)?
Please check your excavator instruction manual and follow it replace/installation. If have problem can contact our technical support.