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Allis Chalmers Discussion Forum
:

which fly wheel marks to use for adjusting valves

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chad

06-09-2004 05:16:17




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ok I fianly got the head back and the new pistons and sleeves in the ol WD-45 and I am trying to adjust the valves.
I think I have found TDC there is a line scribed in the fly wheel and it is paited red. but then I noticed like 3 other scribe lines at about 180 degress from TDC. One of them is Marked F. Does this F tell me anything? And Since there is a TDC mark is there one exactly 180 degrees from that so you know when to adjust the other valves?
TDC compression adjust #1 trun 180 adjust #2 go 180 TDC do #4 go 180 again adjust #3 This correct I am assuming for fire order 1,2,4,3?
Please help me on the fly wheel marks I really need to know about the extra scribe lines and want to know if one of them is 180 degress from TDC.
Thanks
Chad

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Dick L Like cole Said

06-09-2004 13:26:35




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 Re: which fly wheel marks to use for adjusting val in reply to chad, 06-09-2004 05:16:17  
That will get you to where it runs. I then adjust the lifters while the engine is running at slow idle. I was taught in the early 1950's that it was the only way to adjust overhead valves. Subject came up on another Allis site where I told about a tool I had that was made for adjustiing overhead valves with the engine running. I didn't think it was done any other way but I guess by reading the posts on the subject that it is just us old duffers that remember it or still do it that way.

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Keith-OR

06-10-2004 21:08:48




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 Re: Re: which fly wheel marks to use for adjusting in reply to Dick L Like cole Said, 06-09-2004 13:26:35  
Dick, this method really plays heck on feeler gages. That was the way I was taught to set valve clearences when I was younger. But quit doing it that way, got tired of buying new gages. If I am correct #1 piston and #4 come up and are at the top of the stroke at the same time. I brought #1 up to top dead center, adjusted valves on #1 and #4,then did the same for #2 and #3 on my Allis C. I noticed when I had head off both #1 And #4 was up at same time as with #2 & #3 After I adjusted all valves. Rechecked clearences.

for what it is worth

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cole in mo.

06-09-2004 09:03:30




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 Re: which fly wheel marks to use for adjusting val in reply to chad, 06-09-2004 05:16:17  
It's plum simple, if ya already got the head, push rods, and rockers on, turn the engine, the correct direction while watching the valves on #1 cyl. when the intake closes, put a screw driver in the plug hole and feel the piston come TDC. Then check what mark on the flywheel is at the pointer and mark it with your own mark.



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cole in mo.

06-09-2004 09:09:53




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 Re: Re: which fly wheel marks to use for adjusting in reply to cole in mo., 06-09-2004 09:03:30  
I was gonna ad to that, when I adjust valves I watch each set of valves open and close then adjust them. The books say that you can adjust the valves on this cyl when this piston is at tdc, turn untill this piston is at tdc and adjust these valves, but sometimes I get comfussed doing it that way.



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