Analyzing failed parts or poor operation requires the proper skills and equipment. Sometimes these investigations are not always very difficult. Often, troubleshooting a failure just requires a logica..
Analyzing failed parts or poor operation requires the proper skills and equipment. Sometimes these investigations are not always very difficult. Often, troubleshooting a failure just requires a logical approach and applying some common sense.
Case History 1
In this example, as shown in Fig. 1, a lip seal was installed on a 1-in. drive that rotates at 1,000 rpm. Unfortunately, in this case, this seal was leaking. If you pressed on this seal’s rubber lip, it felt much harder/stiffer than a new seal. The radial crack that caused this leak was most likely a secondary failure due to the aged and brittle rubber. Plant records estimated that this seal had been installed on the engine for ove
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