SoCalManche Posted August 14, 2020 Share Posted August 14, 2020 The '86 power steering pump and non-belt-tentioning bracket are less than desirable, so I'm looking to upgrade. I have in my possession a 4.0 PS pump and adjustable bracket, however the donor it was pulled from was scraped due to front-end collision. Is there a way to check the pump to see if it is seized or not? Thanks! Link to comment Share on other sites More sharing options...
AZJeff Posted August 14, 2020 Share Posted August 14, 2020 Rotate the shaft by hand. It should turn smoothly and easily. Link to comment Share on other sites More sharing options...
SoCalManche Posted August 14, 2020 Author Share Posted August 14, 2020 13 hours ago, AZJeff said: Rotate the shaft by hand. It should turn smoothly and easily. Yeah, dumb question on my part. I took the belt off and spun my current PS pump, and it spins freely. The "new" one has some friction unfortunately. Link to comment Share on other sites More sharing options...
AZJeff Posted August 14, 2020 Share Posted August 14, 2020 43 minutes ago, SoCalManche said: Yeah, dumb question on my part. I took the belt off and spun my current PS pump, and it spins freely. The "new" one has some friction unfortunately. Most PS pumps are incredibly simple devices inside. They have a series of vanes attached to a central hub that are spring loaded to rub against the outside of a cylindrical cavity. The vanes are often made out of some sort of plastic-y material, so they don't wear the inside of the cavity. The vanes will drag when dry, but when the pump is filled with some sort of oil (PS fluid or ATF), the drag will drop down, but will never be totally zero. (You cannot spin the shaft and expect it to continue to spin more than a quarter of a turn after letting go.) Put some PS fluild in the pump, and see if it's any easier to turn. Link to comment Share on other sites More sharing options...
eaglescout526 Posted August 14, 2020 Share Posted August 14, 2020 When I pulled the pump, there was some fluid still left in it. I turned it by hand and it was tough, but it also had sludge in the bottom of the reservoir so that could be the culprit like SoCal and I were talking. Link to comment Share on other sites More sharing options...
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