Posted by andy r on January 01, 2019 at 15:27:58 from (208.126.193.44):
Looking to buy a John Deere 4630 or a 4640.
How many internal/external differences are there between a John Deere 4630 and a 4640?
Given the same hours and same general appearance is a 4630 worth all that much more that a 4640?
Were there some mechanical improvements that give the 4640 an edge over the 30's series?
Seems to be many power shift transmissions in the 4630's and 4640's that I have seen. One owners says he has replaced one whole power shift assembly in the transmission at about $6000. Sounded like it was an entire assembly that was bought rebuilt. Are there sort of 2 separate clutch pack/planetary assemblies in the transmission. With these tractors having 7000 - 8000 hours on them should I stick with power shifts or move toward the quad range transmission? Probably would put 200 hours on this tractor yearly consisting of light to moderate draft. Primarily a no till farmer. Thanks a lot. Happy New Year to all of you.
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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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