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  1. #1
    Gold Member sherpa's Avatar
    Join Date
    Oct 2004
    Posts
    431
    Location
    Mortimer, NC (Ghost Town)
    Tractor
    NH TC33D & Ford 8N

    Default Valve adjustment Help!

    I am trying to adjust the valves on my kubota B20 3 cyl.

    Going by the shop manual it says start with the number 1 cyl at TC. It tells you to adjust 4 valves and then turn the engine 1 complete round and adjust the other valves. I know the firing order is 1 2 3 but which cyl is number 1 the front cyl or the rear cyl?

    Also, why cant I just go by the 2 rocker arms that are loose at the same time until all 3 cyl are done?

    Sherpa

  2. #2
    Veteran Member
    Join Date
    Sep 2004
    Posts
    2,385
    Location
    Kansas, Butler county, Just east of DooDah
    Tractor
    Kubota L4200 GSTCA

    Default Re: Valve adjustment Help!

    Sherpa…
    The front is # 1… You want to be TDC because the cam that is operating the valve is a ramp. If at TDC the valves will be either fully open or completely closed. If your cam (ramp) is anywhere else, it is not necessarily full closed.

    Thanks for the reminder [img]/forums/images/graemlins/wink.gif[/img], I have been thinking it’s about time to check mine [img]/forums/images/graemlins/cool.gif[/img]. KennyV.

  3. #3
    Gold Member sherpa's Avatar
    Join Date
    Oct 2004
    Posts
    431
    Location
    Mortimer, NC (Ghost Town)
    Tractor
    NH TC33D & Ford 8N

    Default Re: Valve adjustment Help!

    Thanks, I think I got it, its a lot quiter anyhow. It still dont start any quicker. I guess I need to look and learn what the pump is all about.
    Sherpa

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