75 Chevy 3/4 ton steering issues

[scubasteve16]

Ok Monday morning I start my truck and let it warm up.....My wife hears what she says sounds like a belt winning... i go out after a few minutes and i smell burnt power steering fluid....Well seems my power steering pump is burned up....So today I buy a reman pump and new lines.....I install them put in new fluid and start truck....Get out of truck get under hood to check fluid and pump is hottttt...and i mean like really hot....It was only a matter of a minute from time I started truck to time i got under hood to check fluid and it got hot that quick....What could be wrong....Fluid didnt drop any at all either so it aint pumping fluid into steering gear box ( I am asumming) ....