Ron Goldstein Rongold
Hi guys,

     I have a 6 month old 70431 22kw guardian. When it comes time to check the valve lash, where and how do I spin the engine to get each cylinder to TDC ???


RON
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78buckshot
Hi Ron, when standing in front of the generator the left end is exhaust and cooling output, you will remove 10 - 12 10mm hex head screws from the sheet metal to gain access to the cooling fan. You don't have to take off the rear top panel but you do need to remove the front top and front lower panels. Set those screws aside to keep them separate from the valve cover screws, one of them looks similar to the valve cover bolts but the threads are not designed to interchange. With the cooling fan exposed you now have a way to turn the engine by hand and with both spark plugs removed it turns pretty easy, engine rotation is counter clockwise looking at the fan. 
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Peddler
I just bump the engine over until the valve opposite the one I am checking is down/open then I check the closed one and start the process over for the next one.  It helps if you take out the plugs making it easier to stop at the required place.  I will also say that we do not touch the valve until a unit displays the need or it has a couple hundred hours on it.  Never had a problem with that schedule. 
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Birken Vogt
I believe the schedule is initial adjustment 25 hours and subsequent 400 and that is how I do them because I have found that sometimes they really need it at those intervals; they will quit running completely if ignored and it is possible to damage them.  But I don't try until the initial 25 has gone by so the parts get to know each other, and after that most never run 400 in a lifetime.  But those units that do run all the time, really need it when 400 rolls around.
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BrianMartin
I went to a call a couple weeks ago where the customer had told me the generator wouldn't start. It was installed by myself only 2 weeks prior, and ran fine for hours after the install.

When I tried to run it in manual after clearing an RPM sense loss, I heard some rattling while it cranked and ran for 1-2 seconds (low rpm) and shut down. My first thought was valves.. Sure enough I opened the cover on cylinder 2 and found the exhaust valve rocker wasn't even seated on the tappet and valve.. The intake was also very very loose. Cylinder 1 was within spec. Once I adjusted the valve lash the engine ran smoothly, no obvious sign of damage... 

I never checked valves until 400hrs or so.. But this experience makes me want to check them before start up..
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NorthGuy
Peddler wrote:
I just bump the engine over until the valve opposite the one I am checking is down/open then I check the closed one and start the process over for the next one.


Thank you Peddler. I've done this today. It's so much easier than finding TDC.
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BrianMartin
I don't know why I never thought of doing it that way.. Learn something new everyday.
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