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| John Deere Tractors Discussion Forum |
Topic: Re: how to set valves
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| Mark-Ia
02-24-2013 14:13:44
207.177.117.7
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To get the tappets in position to adjust remove valve cover and spark plugs. Remove plug wires from magnito or distributor!!! This is to remove any danger of a spark which could light off fuel vapors pushed out of the plug holes. Turn the flywheel in normal rotation until the piston on the flywheel side is at bottom dead center on the power stroke. Or to put it another way, all the way down after you feel compression on your thumb held against the sparkplug hole. Then adjust the two left hand valves. Repeat on pulley side and adjust right hand valves. .020 hot or .022 cold
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| gtx1967jewison
02-24-2013 20:07:17
174.225.132.212
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Re: how to set valves in reply to Mark-Ia, 02-24-2013 14:13:44
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| This is WRONG, no offense. The exhaust valve will be partially open @ this position! The only time BOTH valves on any given cylinder are FARTHEST from being open is at top dead center at the end of the compression stroke. This is the beginning of the power stroke.
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| rustred
02-24-2013 19:27:59
72.172.100.113
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Re: how to set valves in reply to Mark-Ia, 02-24-2013 14:13:44
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| do you guys just make this stuff up? never ever heard of adjusting valves like this!!!. they are adjusted when the cyl is on tdc of the compression stroke. have never even seen that in a manual either as to what ur talking about bottom dead centre.
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| Pappy
02-24-2013 15:33:04
70.249.160.145
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Re: how to set valves in reply to Mark-Ia, 02-24-2013 14:13:44
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| I have to disagree. The valves should be adjusted when the piston is at the top of the compresion stroke. Not at the bottom.
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