Unless your husband knows exactly what he's doing, I would suggest having this work done by a technician. The power steering is under extreme pressure and it would be very easy to be injured or damage parts if you don't follow the proper procedure.
While there are many things you can do yourself, I think this job is best left to the professionals.
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〉 Answered on Mar 18th, 2009 by Lori Johnson, Owner and Instructor at Ladies Start Your Engines