There is no 'press on ' power steering pump that I'm aware of.
it either has a threaded hole in the shaft for a pulley installer That installer presses the pulley on the shaft. Said installer is essentially a nut and bolt and back when I worked parts it usually came with a reman P/S pump. Go rent the tool f0r free from autozone https://www.autozone.com/loan-a-tools/po...er-kit/2075_0_0 Pretty sure what he meant was you don't use a press to install it. Yes, the install tool "presses" the pulley on, but using a press can damage the pump from putting pressure on the backside of it.
CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
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