Posted by Dieseltech on May 27, 2013 at 06:20:19 from (199.16.223.2):
In Reply to: Re: Diesel Timing posted by T in NE on May 26, 2013 at 22:29:22:
Direct injection diesels start best with timing retarded, then run best with some advance added as speed is increased. Original JD 3010, 4010 tractors were fixed timing, no advance pumps. Later 3020, 4020 had advance of 5 degrees pump, 10 degrees engine for much better starting and to stop any chance of high speed no load miss. AC made the advance change on 200 for the same reason. If fuel is injected too early there is not enough compression heat to start burning fuel. Later helps starting, but may have no load high speed miss. That's where the advance helps with both starting and running.
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Today's Featured Article - Engine Valves - Some Helpful Information - by Staff. Intake - On the intake stroke the piston moves doward, sucking in carburized fuel through the open intake valve. Exhaust valve is closed. Compression - With both the intake and exhaust valves closed, the pistons upward stroke compresses or squeezes the fuel into the combustion chamber. Firing - Ignited by the spark, the compressed fuel explodes and forces the piston downward on its power stroke. Intake and exhaust valves are closed. Exhaust valves and seats are exp
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