Steering knob question for 318
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Thread: Steering knob question for 318

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    Steering knob question for 318

    I tried to put a steering knob on my 1985 JD 318 that I recently purchased. I love this tractor! I don't understand why I can't place a steering knob on it though. I installed the knob at the 2:00 O' Clock position with the wheels going in a straight line. Took it for a little drive and the steering knob ended up poking me in the gut (6:00 O' Clock) while I was going in a straight line. Put the knob back at 2:00 O' Clock and it ended up at some other random point after a little drive. Then I noticed that the deer on the center of the steering wheel never ended up in the same place twice while going straight.

    What the hey!

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    Is the steering is driven by hydraulics?
    2018 1025r. 260B backhoe, 120r loader, Titan 36" forks, Frontier RT1142 tiller
    1995 Lowes branded riding mower.

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    Quote Originally Posted by jimmylh View Post
    Is the steering is driven by hydraulics?
    Yes, it has power steering.

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    Jimmy, Yes. The 318 had power steering.

    BC, Either EXTREMELY loose front end parts or bad steering control valve. Lift/jack & support to both front tires off of ground. Watch hydraulic cylinder on right side of tractor and push/pull tire...to simulate a turn left or right. If little or no movement before hydraulic cylinder wants to move, bad steering control valve...located at bottom of steering column. Bob
    '80 317 w/18hp B&S and divert valve for rear hydraulics, 3 pt hitch, 5' york rake
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    I have yet to see one that stays in the same orientation.

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    The above posts are correct -- the hydraulic power steering does not provide a deterministic mechanical coupling of the steering wheel position to the direction of the front wheels. Even a brand new tractor would not provide a repeatable position considering over-travel of the wheel at the steering stops, starting and stopping the hydro pump, movement of the steering wheel when the engine is not running, etc. Here is the hydraulic schematic diagram, and the theory of operation for this tractor's steering system:

    Click image for larger version. 

Name:	5-port PS on 318 -  hydraulic schematic.JPG 
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    [ATTACH]685952[/ATTACH]

    Chuck
    Attached Files Attached Files

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    I was thinking the steering knob was going to give me a "feel" for direction. Since it's physical position on the steering wheel would always be relative, I can't use that aspect of the steering knob.

    Question for the folks using a steering knob on their 318, do you get used to the knob stopping at a random position? Just trying to wrap my head around this. I was ready for the funny farm after about 5 minutes of using it.

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    Quote Originally Posted by BetterCheddar View Post
    I was thinking the steering knob was going to give me a "feel" for direction. Since it's physical position on the steering wheel would always be relative, I can't use that aspect of the steering knob.

    Question for the folks using a steering knob on their 318, do you get used to the knob stopping at a random position? Just trying to wrap my head around this. I was ready for the funny farm after about 5 minutes of using it.
    I went though the same thing when I put a knob on my old 445, and its the same way on my new 1025r.

    Yes, you get used to it. I don't even notice it anymore. I just jump on and go, don't pay attention to position of knob relative to tires.

    Sent from my SM-G960U using Tapatalk
    etcallhome and jd2854020 like this.

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    [QUOTE=sld961;3258734]I went though the same thing when I put a knob on my old 445, and its the same way on my new 1025r.

    Yes, you get used to it. I don't even notice it anymore. I just jump on and go, don't pay attention to position of knob relative to tires.

    Sent from my SM-G960U using Tapatalk[/QUOTE

    Thank you! I was hoping someone would say something like this.
    glc and etcallhome like this.

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    glc
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    Agreed that you will get used to it!
    Greg from western pa



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