165 steering cylinder

dlinmi

Member
Rebuilt the control valve, the oil seal was leaking bad. I can't seem to get it to work now. I've adjusted according to the service manual, it seems that the spool should pull out when turning right. My problem may be that when I removed the main arm from the pedestal shaft I didn't mark the location, I see the master spline on the shaft but nothing to align on the main arm. My setup is with the swivel link that has a bend in it, my last attempt I got the spool to pull out of the valve on a right turn and it seemed to be working but nothing trying to turn back straight. As you would imagine there is wear in the anchor pin and or cylinder rod so I think that could alter my adjustments slightly, any advice??
 
Hi,
It does sound like you are losing actuation movement due to play present. Have an assistant rock the steering wheel back and forth and look very closely for lost movement due to play. Axial play in the cylinder rod will destry the actuation and equally so if there is up and down play where the rod is anchored to the casting. If you have the up and down play this can be removed normally by bending a suitable flat washer to the diameter of the rod and patiently filing away until it fits and the anchor pin will pass through.

DavidP, South Wales
 
Thanks, Can you advise on the position of the valve spool as it goes through the cycle of straight, left and right? Anyone else with any advice??
 
Hi again,
Check that the spool is free to move in both directions. Within the pedestal linkage you will see a large screw with a shallow nut on it to lock it. Slacken the nut and screw the pin in as far as it will go. There is an adjustable barrel connected between one of the arms and the spool valve. Ensure that each end is free. Adjust the barrel so that the pins can just be fitted. Nip the nuts up. Screw the big pin back SEVEN turns. This is the initial adjustment for power assistance. If there is wear in the barrel pins or their holes you will lose actuation. For the best results all play must be taken out. Barrel ends can normally be drilled out and larger pins fitted. Again, have an assistant operate the steering wheel back and forth and check the movement of the spool. It should be equal both ways. It may be necessary to slacken the big screw one 1/4 turn at a time more until best operation is achieved. If there is wear present you will never achieve good PAS.
DavidP, South Wales
 
I don't understand about the spool moving both ways. After putting on the new o rings when the spool was attached in the assembly with the snap ring, and before putting the dust cap back on the other end, I could see that the spool was all the way "in". The end opposite of the linkage was right at where the cap went on. The spring on the linkage end pushes it in that direction. It seems as if the hydraulic pressure would be "steering" in one direction all the time until the spool is shifted out by turning the steering wheel and redirecting the flow to assist in that direction??
 
Hi, the spring and its locating washers allow the spool to move in both directions. There are 3 positions, push, neutral and pull. The spring returns the spool to neutral. If you do not have the 3 positions you will not have PAS on one side.
DavidP
 
Thanks for all the info, I've tried to eliminate the play in the cylinder rod. I did the washer fix and replaced the mounting pin with a bolt I ground the threads down on until it fit. But I'm at my wits end with this thing. Mine is the one with the swivel link with a bend in it and the steering adjustment screw and lock nut in the main arm from the front. I don't understand why I can't adjust this, it worked fine with all the worn components prior to the control valve rebuild, it leaked so bad that I'd loose power steering after 15 minutes of use, but if I refilled it would still work fine. Thanks for all the help
 
Finally got it, put bigger pin in the control valve end of swivel linkage and made a bushing to tighten up the swivel connection, still took a lot of tinkering. My manual says to set the steering adjustment set screw in the main steering arm in then back out 2/3 turn adjust swivel link so you can get pin in, then back out set screw another 2/3 turn. I ended up backing out the set screw several full turns to achieve steering both directions, hope it holds up, thanks David P for the help
 

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