1982 Chevy c30 mason dump rigged for fall cleanups. I used it last week and worked fine. Next day started fine then first job it wont start. Acted like battery dead but wasn't. All day the pump for the dump bed was draining battery. So that is figued out but next task is getting bed up to look everything over. How do you get the bed up without power to the pump! It may seem like a stupid question but I have never done it before. Is there a release for the pump. A cable for power is pinched or nicked causing the battery to drain, need to fix this. thanks!