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This post was last edited by Sunny Rain 2018-1-13 16:55. Our unit model is 4M25/198-32. Since the installation, there has been serious oil leakage at the connection between the fuselage and the middle body, and oil dripping from the fuselage tie rod. In 2018, we tried to find ways to improve it. The solution is: Tighten the bolts of the fuselage and clean the sealant inside the fuselage and apply it again. Can any expert tell me which sealant is better to use and how to remove the previous sealant and oil inside the fuselage?
Using sealant is not the final goal, but the sealing surface should be cleaned before tightening the bolts.
Generally, sealants should be used for emergency treatment, but the properties of sealants are different. You can choose the following according to the working conditions and environment of your own equipment!
Will the amount of leakage be reduced if the internal sealant is prepared or thickened?
Maybe the gasket is broken. Replace it and apply sealant.
Fastening is the means. Under this working condition, the selection of sealant is the core of solving the problem~~~~Oil-resistant + metal-filled sealant should have better performance~~~ Prerequisite: Clean the sealing surface (use surface or even carbon tetrachloride~~~)
What I mean is to add sealant to the connection between the midbody and the fuselage, but to add sealant to the inside of the fuselage. Clean the oil inside the fuselage and apply a layer of sealant to the entire body. Especially add more sealant to the joints to prevent the oil in the fuselage from penetrating to the outside. Is this method feasible?
A similar situation has occurred in our factory. The sealant effect is not very good. We need to shut down the machine for processing, replace the pad, or clean the oil stain before applying the glue. Applying the glue when there is oil stain is almost a waste of time, and the oil resistance effect is not good. We have used all imported and domestic products. The final option is to shut down the machine for treatment, which is no different from overhaul.