My car is a 1966 250SE with auto trans, the engine is now from a 280SE but power steering pump is the 250SE one, crank pulley on the 280 engine is the same as the original so there is no change in driving ratio.
Firstly what fluid should be used? is ATF fluid OK?
My car has a small hose from the steering box which connects to a rigid pipe which finally connects to a hydraulic actuator on the throttle linkage (this position is shared by an electric actuator also).
The original hose was in poor condition so I had a replacement made up by a hydraulic hose company this hose failed with a small pin hole so I had it remade thinking there may have been a material issue, the second hose has now blown in a big way spraying the fluid all over the engine, this hose is rated at 435psi.
Also the power steering fluid is leaking from the reservoir tank when the engine runs, the level is correct and the system was bled at the steering box it was noticed when bleeding that the fluid at the bleed screw was foaming even when the air had escaped.
1. Does anyone know if I can disconnect this hose and blank off the connection on the steering box? I believe only a small number of cars were fitted with this device which supposedly increases the engine revs when turning at low speeds.
2. Does anyone know why the power steering pump is developing a pressure that can burst a 435 psi rated hose.
3 with the fluid escape from the tank it appears that there could be back pressure??