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| | | | Joined: Apr 2002 Posts: 5 New Guy | | New Guy Joined: Apr 2002 Posts: 5 | i have a 1963 gmc suburan (carryall) it has factory power assit steering with steering cylinder and control valve. the question is can i use a newer pump to make it work .i`am worried about the pressures .thanks | | | | | Joined: May 2005 Posts: 8,878 . | | . Joined: May 2005 Posts: 8,878 | I would think a new pump would be just fine. If you want a lower pressure a weaker spring in the relief valve/pressure regulator valve in the output fitting of the pump would do the trick.
First find out what the normal, or allowable pressure is on the old system, and what the new pump should put out, may not need to do anything.
Grigg | | | | | Joined: Apr 2005 Posts: 2,097 'Bolter | | 'Bolter Joined: Apr 2005 Posts: 2,097 | The newer pumps put out about 1300 PSI which are used with the later Saginaw PS units. Most of the control valve type systems that Ford & GM used operated on about 900 PSI. As do Mustang II racks and Toyota units. You can get a washer kit from most speed shops to install in the pressure contol valve in the pump. From what I remember is that it took about 3 washers for the last one that I set up for a Mustang II.
Fred
1956 3100 Pickup/Red/350/3sp OD/PS/Disc Brakes
1957 Bel Air Sport Coupe/Red/355/TH350/PS/Disc Brakes
2017 Silverado LT Single Cab SB/Black/5.3/6 Speed Trans
1947 Willys CJ2A w/F-Head engine
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