Hello, i need some serious help with a 1999 da-350 blaw knox jetsealer machine. We removed the main pump and sent it out to get resealed. After this, we installed it and no drive forward or reverse. Thought it was a dirty filter so we replaced, nothing. removed line at pump coming from filter and found pump blowing instead of sucking in, you think pump got put back together wrong or is pump bad? Steering pump which is attached to this pump works fine, Please help.