Went through something simular with our New Holland 6640, turns out a thread in the fuel filter housing was stripped thus letting air in the system when it sat for a few hours. Before finding the stripped housing sometimes it would bleed faily easy then start, or it was a real bear to bleed to get it started. I would go over every fitting to make sure everythings good, and it doesn't take very much of a leak (it didn't leak fuel, but appearantly it let air in when it sat a few hours) I didn't think I was ever going to figure it out.
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Today's Featured Article - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let’s make one more addition to our series on hydraulics. I’ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
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