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....does anybody know what Power Steering Pump that is? I have no idea where it comes from, if it is Ford oder Chevy or... ?
It allready was installed in my Truck and worked fine, but it worked on a steeringbox and now i got a Mustang 2 Rack and Pinion Steering.
So i want to make sure if it works with the same pressure and volume!?
Thompson pump from mid '60s - '77 Fords. In '78 they began using the big mouth plastic reservoir pumps. They used them on Mustang II so it will probably work.
You would need to know the required pressure for the rack (Shop Manual) and the pump (or gauge it). You would then have to match the pump output to the rack requirement.
They used them on Mustang II so it's probably O.K. Yours has the small diameter fill tube which indicates '67 and newer. The sliding mounting bracket didn't show up until the later years, I'm thinking the years after Ford abandoned York and Tecumseh a/c compressors - around '76 or '77 (Ford had better automatic air, GM had better compressors so when the patents expired they agreed to share with each other.) Typically p/s/ pumps, within a series (Eaton, Thompson, Saginaw, etc.) rarely differ by more than a couple hundred p.s.i. I'd give it a shot if it were mine.
I agree with KULTULZ. Don't guess. As he suggested check with the manufacturer of the rack and then put a gauge on the pump. The Toyota steering boxes need 1100-1400 psi to work correctly but the Eaton pump that I got from a 1955 T-Bird only put out 650 psi. If you get it wrong you could blow out the seals in your R&P . . . messy and expensive.
I agree with KULTULZ. Don't guess. As he suggested check with the manufacturer of the rack and then put a gauge on the pump. The Toyota steering boxes need 1100-1400 psi to work correctly but the Eaton pump that I got from a 1955 T-Bird only put out 650 psi. If you get it wrong you could blow out the seals in your R&P . . . messy and expensive.
...that is what i 'guess' also.
But i was hoping anybody allready has experience with that!?
It wouldn't blow the seals out (unless they were already worn) it would just be over-assisted (very light effort, poor road feel.)
It can blow seals (box or rack) if over pressurized and/or burn the pump. With all of the TECH ARTICLES written over the years on a PINTO/MUST rack swap, someone had to figure it out.
Thanks a lot.
Bill do you know the working pressure of that pump and in the best case the working pressure of a Mustang 2 Rack also?
Is that compatible?
Not to beat a dead horse but Saginaws are typically recommended because of their higher operating pressure. Ford/Thompson pumps typical working pressure of 600-700 psi. and a dead-head pressure around 1200. Saginaw pumps are typically 1000-1200. Kinda funny some shops recommend using Saginaw pump then also recommend using an adjustable pressure diverter to dump excess pressure... I suppose their theory is M2s weigh less than a pick up so up the pressure with a different pump. When it steers too easy they'll sell you the valve.
