The turntable of the excavator keeps ringing and leaking oil. When it hits butter, it does not ring on the same day and it will ring in second days
Check the following steps and specific methods: (1) maintenance is correct: slewing bearing cavity of the oil filling cycle should be 150~250h (manufacturers recommended maintenance cycle is 250h) but the actual work according to the strength and frequency of the rotating parts of shortening. If the filling is too frequent, will lead to a large number of grease leakage. (2) the rotary motor of the hydraulic oil or gear oil is up to the slewing ring cavity: if this is the case of the leak, open the slewing ring grease check cap, will find the grease has been thinning. This thinning is characteristic of mixed with hydraulic oil or gear oil (3) raw oil filling equipment selection is correct because the original oil filling equipment may not be correct, there will be the slewing bearing slewing ring or a slightly elevated temperature on the oil thinning. If the diluted grease is turned, the driving gear of the motor is pushed into the upper section of the inner gear ring in the process of engagement, and then flows into the bearing cavity through the inner oil seal, and finally, the grease drips out from the outer oil seal. (4) the external oil seal is missing: carefully along the rotary seal for inspection, to determine the local, section leakage, or even the surrounding leakage. Check whether the entire rotary seal is missing. (5) whether the external oil seal is fixed: the outer oil seal shall be relatively fixed with the sealing groove of the lower frame. The key to the inspection is that the excavator must be observed during the slewing movement. If the oil seal rotates at the same time when the equipment rotates, it shows that the existing oil seal has been loosened in the seal groove, and the outer oil seal must be replaced. This method has certain risks, so we must pay attention to safety, but this is to check whether the rotary seal does play an important role in sealing methods.
(6) the internal seal has obvious damage: turn the gear ring, grease, check the cover, check the ring, the oil cavity, whether there is a significant reduction in oil, and whether there are broken oil seals. If there is a substantial decrease in fat, it indicates that the oil has been left out. (7) to determine the bearing cavity of the oil leakage is still the slewing ring cavity grease: different colored oils and injected into the bearing cavity, after a period of time (such as 150h) after use, such as grease bearing cavity oil has basically replaced after, according to the color of oil leakage around determine the slewing ring of oil or grease in bearing chamber. This is one of the methods used to judge whether the internal seal has failed or not. (8) to observe whether or not a normal rotary equipment: if the equipment in the rotary motion of the abnormal sound or unstable phenomenon, it may be bearing clearance is too large and uneven, resulting from the outer oil seal extrusion bearing in the rotation process of oil. (9) check the inner oil seal: the above inspection has been completed, and the elimination of problems, the problem can be concentrated in the bearing oil seal. Take out the surrounding bolts of the revolving parts, remove the tubing on the moving part, and hoist the upper frame part with a crane. Since this method requires the use of cranes and the workload of the whole process is relatively large, so this is the last step in checking and solving problems. Therefore, it is suggested that this method be adopted after all the foregoing steps have been completed and other possibilities have been eliminated. Three, treatment methods: 1, if once identified as a result of sealing problems, you need to remove the old seal, and use diesel or gasoline cleaning sealing groove, the new seal completely into the sealing groove can. It should be noted that there is a joint after sealing the ring, and it needs double tubes
