My neighbor had a 8630 John Deere If I remember right JD put a 8650 engine and 4 pinion diff plus some other stuff for about 12000. I don't know what they did for 40's There was a lot of 8630's around here every one had been changed. Now everybody has traded them for a 8400 8530
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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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