1. MrJLR

    MrJLR Built, not bought FABO Gold Member

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    While I'm waiting for some parts to get my engine back in, it was the perfect opportunity to do the "Pump It Down " modification to my power steering pump.

    Already off the engine made it easier but still easy while in the car.

    In the vise
    20160618_200546_zpshw8l704m.jpg

    Valve assembly out...
    20160618_200621_zpsr4tcuzrl.jpg

    Stem disassembled

    20160618_201145_zpsl6tdblaf.jpg

    Little. 016 shim....
    20160618_201235_zpsmasis3o8.jpg

    I'm lucky to work in a machine shop. ...made up some washers...
    20160618_201330_zpsu6uazkjc.jpg

    Stacked together. ...
    20160618_201410_zps8nrahpqf.jpg

    Then just reassemble. ....
    Honestly. ...it's easier than falling down drunk!

    Jeff
     
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    • 74.Dodge.Dart.S

      74.Dodge.Dart.S Well-Known Member

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      What are some of the symptoms you have that make this mod worth doing to fix it?
       
    • Lustle

      Lustle Well-Known Member

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      Not so much "symptoms" as it is how the power steering is on certain A bodies. Gives them a "light" "disconnected" feeling between the steering and the road. The problem is the pump is too strong. Makes the steering floaty feeling. That's how I can best describe it. But it's odd. Makes it more difficult to center and point the car. To cut/carve corners. You feel separated from the front tires. This mod is designed to be a half way point between over the top power steering and terrible in parking lots manual steering. Gives you a lot of that manual feel on the road. While still having the ability of power steering. It's a recommended mod for anyone doing serious corner driving in their car. As far as I understand it. I haven't done it yet, but its on the list.
       
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      • MrJLR

        MrJLR Built, not bought FABO Gold Member

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        It just lowers the the power steering pump pressure making the steering feel tighter.

        Jeff
         
      • moparmat2000

        moparmat2000 FABO Gold Member FABO Gold Member

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        Yup yup. Article in a mopar magazine talks about this. The pumps are way overboosted on the V8 cars giving a disconnected feeling. This is way cheaper than using a custom borgeson GM type steering chuck in your mopar. An alternative to machining your own spacers to drop the pump pressure is to get one of the valve assemblies from a slant six car and swap it to your V8 pump. The saginaw pump in a slanty runs a lower pump pressure than the V8 car possibly due to it being lighter by maybe 200 lbs.

        Also using C body idler and pitman arms which are a little longer than A body arms and will increase the steering ratio as well. (T/A challenger trick) this sets the centerlink back a little bit more than stock. Possibly a problem with headers, and only goofs up the ackerman angle when the steering is at full lock.
         
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        • 67autocross

          67autocross A new iron curtain drawn across the 49th parallel

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          I think Bergman Auto sells the spacers for under $20 for those who can't make some themselves.
           
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          • gerty

            gerty Well-Known Member

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            How about just using a /6 pump and swapping out the brackets? I'm putting a small block in my Duster so I already have the pump and brackets.
             
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            • Ben Drinkin

              Ben Drinkin Off the Wagon.. FABO Gold Member

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              Is this the same for a Federal pump?
               
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              • moparmat2000

                moparmat2000 FABO Gold Member FABO Gold Member

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                Pulley may be different, then you got to swap em. I think saginaws take a special puller/installer tool. Easier to mod the valve on the V8 pump
                 
              • moparmat2000

                moparmat2000 FABO Gold Member FABO Gold Member

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                I think they are different.
                 
              • 72bluNblu

                72bluNblu FABO Gold Member FABO Gold Member

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                They're completely different. I have heard that the federal pump can be modified to lower the pressure, but it's a different procedure than the Saginaw.
                 
              • jeffnmo

                jeffnmo Just another Mopar Maniac FABO Gold Member

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                I did it to my Federal pump not to lone ago, You just have to take off the tank to get to the pressure valve, I added two washers from an old pump for a total of three and it was a night and day difference for the better.

                Jeff
                 
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                • MrJLR

                  MrJLR Built, not bought FABO Gold Member

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                  Glad to hear it was worth it! Really firmed it up huh?!

                  Jeff
                   
                • jeffnmo

                  jeffnmo Just another Mopar Maniac FABO Gold Member

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                  Sure did, I wasn't expecting that much change, well worth it and so simple to do and best off all it was FREE!

                  Jeff
                   
                • toolmanmike

                  toolmanmike FABO Staff Staff Member FABO Gold Member

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                  Anybody have any diagrams as to what it looks like inside?
                   
                • MrJLR

                  MrJLR Built, not bought FABO Gold Member

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                  Pictures in first post.....or are you looking for something different?

                  Jeff
                   
                • toolmanmike

                  toolmanmike FABO Staff Staff Member FABO Gold Member

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                  Sorry, Federal pump.
                   
                • MrJLR

                  MrJLR Built, not bought FABO Gold Member

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                  Oh.....I misunderstood....

                  Jeff
                   
                • JoeSBP

                  JoeSBP RLTW!

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                  best way to describe the feel is a car that doesn't have enough positive caster. I'll take strong arming to park over that any day!
                   
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                  • toolmanmike

                    toolmanmike FABO Staff Staff Member FABO Gold Member

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                    My Swinger is typical loosie goosie. Yes a little caster would help or reduced pump pressure.
                     
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                    • 318willrun

                      318willrun Stomper 4x4... we kept energizer in business

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                      A little off topic, but I always got my "firmer" feel by going manual. :steering:
                      40 lbs lighter, eliminates a belt, gobs more room on the drivers side, faster to pull or install the motor, ....... AND.... the firm feel :D
                       
                    • R4Sedan

                      R4Sedan Life in the Fastback Lane FABO Gold Member

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                      I like. I'll have to do that to mine.
                       
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                      • Lustle

                        Lustle Well-Known Member

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                        I gotta do this to mine. She just has that loose feeling upfront. Like you just cant ever get it pointed. Hate it. Got the .890 bars right now. Going to get 1.03 bars and a nice swap bar front/back setup, new shocks, should totally change the ride.
                         
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                        • Ben Drinkin

                          Ben Drinkin Off the Wagon.. FABO Gold Member

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                          Thanks Jeff. I have an old pump I can steal from...
                           
                        • toolmanmike

                          toolmanmike FABO Staff Staff Member FABO Gold Member

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                          Yes thanks for the info Jeff.
                           
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