These cannot just be bolted on. The have to be centered and tightened on a hydralic pressre unit. Once you take this off the box. The box has to be sent out and be calibrated when reinstalled. Good luck.
Hum...I agree you can't just bolt them on as they have to be centered once installed but "tightened on a hyd. pressure unit"? My factory service manuals (I have a 68 and a 70 manual) go into detail on rebuilding the PS box and tell how to center the control valve but say nothing about that. Although this is only the 2nd PS box I've worked on I have worked on hydraulic systems for over 20 yrs. on all sorts of equipment and never ran into anything like that. I also know of no sort of calibration that you can do to the power steering box, other than center the valve once it's installed. I rebuilt the PS box according to the factory serv. manual and what I see is the PS box has a pivot lever sticking up through it that moves as soon as you turn the steering wheel one way or the other and that pivot lever moves the spool in the control valve to send hyd. pressure to one oil port or the other depending on which way you turn the wheel. The reason I need a control valve is the spool is sloppy in the bore and leaking past. Even though I have worked on a lot of hyd. systems in the past I'm not all knowing and would love to see where you got your information from. Thanks for your input.
