PAS Pump Pressure?

[302Rover]

Hello all,
can anyone tell me what the output pressure of the 3500S power steering pump should be? I've fitted a PAS box from a 3500S into my 2000TC and coupled it with a Saginaw pump salvaged from an American car but need to make sure I'm running the correct pressure for the Rover steering box. I've searched the archives but can't seem to find any information on this. Any help appreciated.

Cheers,
Tom

 

[harveyp6]

With a pressure guage between the HP hose and the box, the steering held on full lock, and with the engine at 1000rpm the pressure should be 850-950psi, allow to idle, 400psi minimum, and then with the steering backed off from lock, 100psi maximum at idle. Don't hold it on lock for too long....

 

[chrisyork]

Granted your 2000TC may be the exception that proves the rule, Tom. But a normally tyred 4 cylinder is actually a tad light with the full monty PAS pressure and a slightly lower pressure pump can be an advantage.

Chris

 

[302Rover]

With a pressure guage between the HP hose and the box, the steering held on full lock, and with the engine at 1000rpm the pressure should be 850-950psi, allow to idle, 400psi minimum, and then with the steering backed off from lock, 100psi maximum at idle. Don't hold it on lock for too long....

Thanks, Harvey, just the info I was looking for. Now an additional question: do you happen to know the flow rate requirements for the 3500S steering box?

 

[302Rover]

Granted your 2000TC may be the exception that proves the rule, Tom. But a normally tyred 4 cylinder is actually a tad light with the full monty PAS pressure and a slightly lower pressure pump can be an advantage.

Chris

Hi Chris,

yes, you are right, the steering is a bit light, even with the current set up of a Ford V8, wider 15 inch tires, smaller steering wheel, and a pump running at 850 psi.

The reason I'm asking these questions is that I'm considering fitting a new serpentine belt front end to the Ford motor. A local company sells a nice assembly consisting of an adapter plate, new alternator, p/s pump, a/c compressor, new water pump, and new crank pulley. There is a choice of p/s pumps so I need to make the right choice regarding flow rate then crank down the output pressure to match the Rover steering box requirements that Harvey quoted in his response.

Thanks for your help,
Tom