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Farmall & IHC Tractors Discussion Board

Re: 500-C Crawler engine problem, Timing???


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Posted by Janicholson on July 10, 2007 at 06:27:53 from (199.17.6.122):

In Reply to: Re: 500-C Crawler engine problem, Timing??? posted by Doug in Pa on July 09, 2007 at 17:39:11:


The valve cover needs to be pulled off, along with the injectors on all cylinders. The #1 cyl (away from operator (sorry for the obvious, no derision intended)) should be placed at TDC. This will either be on the top of the compression stroke, or the top of the exhaust stroke. Both valves should be closed if it is the top of the compression stroke.
Both valves will (probably be nearly closed if it is the top of the exhaust stroke.
Rotate the engine (by hand) in its correct direction watching the valves. If it was on TDC compression, both valves will stay closed until the crank is turned 180 degrees (or very close), then the exhaust valve will begin to open.
From there, the exhaust valve will remain open until just before it reaches TDC again.
If it was the TDC of the exhaust stroke, the intake valve will begin to open right away as the rotation begins, and it will stay open until near the end of the 180 degrees. Then the intake will close, and the compression stroke begins with both valves closed, on up through TDC for about 360 degrees.
If this is checked, and found to be close, I would suspect the pump, or other issues with compression.
The way it stopped is not like timing, it is like a fuel issue.
However, if you can turn it by hand with the injectors in, the situation might be compression, Diesels are difficult to turn with a starter, and usually not by hand at all.
The information I have given is generic, I am not framiliar with the 500C engine, and have no clue whether it has the Gas start, diesel run engine of the early series, or a diesel with pre heater, or with glow plugs. The diesel part of the valve cycle I have described is accurate and will tell the story of timing. Best of luck, and please let us know what happens with a new thread, and what turns out to be the cure. JimN


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