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Old 03-02-2012, 08:06 PM
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power steering problems

just finished the install of the thunderbird power rack in my 1957 ford f 100. I have a bbc in this truck so the easy thing for me to do was to use a gm Saginaw pump. every thing went well up to the point of starting the truck. the steering wheel jerked violent out of my hand. I shut everything down and checked for fluid in pump air in rack anything cant find anything I could have done wrong. Could i have put the pressure to the wrong side of the rack ? I was told that the 16mm fitting was the pressure inlet. please help I am out of ideas

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Old 03-02-2012, 08:45 PM
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Did you bleed the system before startup?
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Old 03-02-2012, 08:47 PM
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Before starting , did you crank the wheel lock to lock several times with fluid in and then recheck fluid level so that you get everything filled? Also do this after starting and everything is OK, and recheck fluid level. If that don't work, be sure that you have the pressurre side to the proper inlet on the rack.
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Old 03-03-2012, 09:40 AM
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Quote:
Originally Posted by rexallen
just finished the install of the thunderbird power rack in my 1957 ford f 100. I have a bbc in this truck so the easy thing for me to do was to use a gm Saginaw pump. every thing went well up to the point of starting the truck. the steering wheel jerked violent out of my hand. I shut everything down and checked for fluid in pump air in rack anything cant find anything I could have done wrong. Could i have put the pressure to the wrong side of the rack ? I was told that the 16mm fitting was the pressure inlet. please help I am out of ideas
My LS-1/Maverick swap did this the first time I touched it to bleed the air, snapped the wheel right out of my hand! The GM pump(s) put out too much pressure/flow for a Ford rack. I replaced the outlet fitting in my pump with a DSE reducer fitting and all is good.

Russ
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Old 03-04-2012, 02:18 PM
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Air in the system will do it ever time, regardless of the manufacturer.

Trees
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Old 03-04-2012, 06:09 PM
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Those old fords with the cylinder mounted on the drag link type assist will do that when they get air in them.pretty common on those after a rebuild...unless you bleed it.
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Old 03-04-2012, 09:03 PM
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If it's the linkage type power steering, if the control valve is too tight it will do this. there has to be a bit of clearance, about 1/8" each way for the valve to work properly. If it's indeed a power rack from a Tbird, the lines at the rack are reversed.
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Old 03-05-2012, 09:35 AM
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The OP stated "thunderbird power rack" in his post (same as the one in my Maverick swap). In my case, I attempted to bleed the air by going lock to lock, but the second I touched the wheel it snapped out of my hands. Again, the GM pump's output will overpower the ford rack...

Russ
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Old 03-05-2012, 12:57 PM
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power rack

thanks for all the info you all sent back. The problem was to much psi and the crapy rebuild rack. all fixed now but had to decrease the out put of the gm pump
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