7am n 11am on 10 29 21 EE W was working with EE J performing maint. on an excavator bucket, pin wgt 80# EE W decided to lift the pin n not use equipment provided. Witness warned EE of weight but decided to lift anyway, while lifting EE twisted, heard a pop. EE kept working then later reported to lead. EE taken to med facility, lumbar strain, given medication and work restriction