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Subject: Power Steering Start Up Problem, Ford 850

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LarryMaine    Posted 07-21-2020 at 13:29:01 [URL] [DELETE]        [Reply] [Email]  
  • Power Steering Start Up Problem, Ford 850
  • I just finished installation of an OEM Power Steering system on my 56 Ford 850, obtained from a salvage yard. My steering wheel will now not move in either direction more than just a few inches. Prior to install I disassembled all components, replaced all O rings and gaskets, and the center plunger springs. After install but before starting engine, steering wheel worked just fine. I disassembled the tie rods at the axle prior to start up. Only one minor leak at pump pully shaft, really minor. On start up, wheel turned OK for about 1 minute, but then froze up on me. Wheel does move up and down as it should when turned L & R. After shut down, it is still frozen up. The It FO-20 manual is good for repairing an existing system, but misses out on some info needed for a new install like this. My install at the steering box matches the manual photo, and return and pressure lines are connected correctly. On my cylinders, the outside port goes to the higher port on each side of the valve body, and the other port is at the very bottom of the cylinder. Before I start moving hydraulic lines, or remove the valve body, has anyone else had this problem? Are my L & R cylinders reversed, i.e. should the ports be on the top and outside rather than on the bottom? Is the problem at my valve body? Any help fixing or at least diagnosing this problem will be much appreciated. Larry.

    Ultradog MN    Posted 07-22-2020 at 05:38:02 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Power Steering Start Up Problem, Ford 850
  • You may have been able to turn it at first because you had only air in the lines.
    I'm thinking you may have the lines to the cylinders crossed.
    Lift the front axle off the ground and disconnect your steering cylinders on the front end and let them hang from the drag links with a wire. Then start the tractor and see if they move in the same direction as the drag link when you steer it manually. It takes some concentration/thinking to get your head around the cylinder and drag link moving the same way when you turn the wheel. Does me anyway. So just watch one side at a time.
    Let us know what you find.
    Those tractors steered pretty easily without PS but once you have it working you will cry if you have to go manual :)

    LarryMaine    Posted 07-22-2020 at 13:21:17 [URL] [DELETE]        [Reply] [Email]  
  • Re: Power Steering Start Up Problem, Ford 850
  • Thanks, sounds like a smart way to diagnose the problem without moving lines helter skelter. Will get back to you in a couple of days, depending on the weather. Larry.

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