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A primer on the JD350B drivetrain

F

FiremanJohn

Member
Somehow a JD 350B in pretty sorry shape followed me home. It runs really strong, and that is the only good part. The price was right and I can not scrap anything. So when it arrived last year it drove straight forward and reverse. It did not turn, and I knew I would have to do steering clutches. So be it. But now I started it up and it fired up like a champ. I can not get it to move in either direction. Now the part I do not get. When I put the reverser in forward or reverse, primarily reverse, it starts to bog the engine down, and would probably stall it, even with the transmission in neutral. Along with that it starts dumping hydraulic oil from the engine compartment. I am perplexed how an engine can bog down with a transmission disengaged. All feels like it is working well internally. Can someone fill me in on the basic concept of this machine so. Thank you
 
I wonder if the transmission shifter forks are messed up and allowing the trans to be in 2 gears at the same time , While the shifter shows neutral.. Another thing that just popped into my mind, If there's extreme leakage in the reverser, maybe it's trying to do both directions at the same time , by fluids crossing over the sealing rings within the manifold.. Doesn't sound like a cheap fix..
 
Not a rare event for a hydraulic reverser to have warped clutches or a fried/melted center-bearing that results in doing what you describe. It can happen even if NO gear transmission was hooked to its back. Does it stopped bogging down when you push in the clutch pedal?
 
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