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JD 1520 Valve Adjustment ?

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11-11-2012 05:15:31

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Does anyone know how much clearance when adjusting the valves on a jd 1520?? I am replacing my fan belt and thought I should adjust the valve long as the hood is off. I have
a new valve cover gasket but can find my shop manual for the life of me.


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11-11-2012 08:22:12

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 Re: JD 1520 Valve Adjustment ? in reply to Little Red, 11-11-2012 05:15:31  
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FYI, when the books spec those combinations like TDC #1, adjust I and E on #1, E on #4, I on #2, etc, it's just to save more engine rotations. If ever in doubt, just turn one cylinder to TDC (I like to use my thumb in the spark plug hole to feel the compression stroke just to be sure), then adjust both valves. Then do the same for each cylinder. Knowing the firing order is handy here, too. At TDC compression, both valves will be closed or you have other problems!

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11-11-2012 06:41:41

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 Re: JD 1520 Valve Adjustment ? in reply to tom3215, 11-11-2012 05:15:31  
14 intake 18 exhaust....make sure engine is top on number 1, put in pin to lock ex and intake on number 1 and #2 ex....rotate engine lock it, do both on #3 and intake on #2

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11-12-2012 05:20:28

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 Re: JD 1520 Valve Adjustment ? in reply to cannonball, 11-11-2012 06:41:41  
these are for diesel...

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11-11-2012 07:10:48

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 Re: JD 1520 Valve Adjustment ? in reply to cannonball, 11-11-2012 06:41:41  
Thank you for the info ! So just to make sure I understand, I can put #1 piston(back cylinder) to tdc, and then I can adjust both exhaust and intake on tdc. Rotate to tdc on #2 do the same and then #3 and do the same?

Sorry for being so dumb, where/what do I pin to lock the tdc :)


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