Tractor won't cut off.

[Tx Jim]

Recovery
I'm just trying to keep the info correct for the model of tractor that was inquired about. Sometimes too much info "muddies the water" IE confuses people!!!
Jim

 

[Recoveryhill]

Tex,

Thanks for your concern for the JD community that has identical Tractors. Whether or not a Rotary Distributor Fuel Injection Pump has Housing Pressure Cold Advance (HPCA) Solenoid doesn't mean a thing to the OP's issue. I'll stand by my compliment for you calling out the pump governor. The governor only controls Idle and Max RPM, everything in between is Operator Throttle commanded. I didn't understand the linkage between the shut off solenoid and the governor, but now I do and I can only hope anyone else that is curious does, as well. The OP's problem with not returning to idle when Commanded and failure to Shut Down when the solenoid is de-energized is better understood, for Red, Orange, Green and Yellow tractors above and below the Mason Dixon Line, even Way Below That Line!

I also hope that at least "someone" appreciates the contribution of Mr. Roosa, the inventor of the Rotary Pump that changed the powering of all farm tractors, everywhere for decades. Now all we need to do is learn and understand Electronic Common Rack Fuel Injection.

"The mechanical fly-weight governors of inline and distributor diesel fuel injection pumps used to control fuel delivery under a variety of engine loads and conditions could no longer deal with the ever increasing demands for efficiency, emission control, power and fuel consumption. These demands are now primarily fulfilled by the Electronic Control, the system which provides greater ability for precise measuring, data processing, operating environment flexibility and analysis to ensure efficient diesel engine operation. The EDC replaces the mechanical control governor with an electro-magnetic control device."

Texas probably doesn't like that, would be my guess?

 

[Tx Jim]

What the heck has common rail got to do with the original question? NOTHING and you're muddying the water again.
Jim

 

[Recoveryhill]

What the heck has common rail got to do with the original question? NOTHING and you're muddying the water again.
Jim

Sorry Tex, I don't equate detailed information with muddy water.

Was it a bad thing to trace diesel fuel injection from inline pumps to rotary pumps and then mention electronics? Was it a bad thing for me to express my own education on how the OP's problem could be the fuel pump, as you stated, and not the delivery system or throttle linkage as I incorrectly guessed?

It is not my intention to confuse anyone, if that's what you mean by muddy water. I still don't see how posting detailed information on a rotary pump and it's magnificent inventor and pointing out how the OP's problem was likely the pump according to the explanation in the Oliver article would confuse anyone. If there is confusion it's mine, with your comments which I truly don't understand.

My understanding of these forums is that they are a free flow of information, corrected by others when necessary, all adding up to increased knowledge of how machines work and what is possible and impossible with them. Sorry if I didn't adhere to what seems to me to be a very narrow interpretation of that mission for the forum. Opinions also have a place here, and while I respect yours, and have expressed my own in the past, I feel justified in defending my providing what I thought was both interesting and instructive information on injection pumps.

Peace

 

[Tx Jim]

Recoveryhill
You can make all the excuses you chose but "common rail" and a JD 302 have only one thing in common. They both utilize diesel for fuel but nothing else. Have a wonderful day!
Jim

 

[skyhook]

Sounds as if the governor drive ring in the inj pump is bad. Inj pump needs to be renewed with some good parts before you find a piston connecting rod protruding from the engine block..

I agree with this,
even though the fuel shut-off is working as it should,
if fuel is still "slipping by" you need to have your injection pump checked.
It's giving you a warning sign, a runaway diesel is not a pretty site, been there, done that.

 

[louiedog]

I want to thank everyone for the help. I priced a remanufactured fuel injector pump at $1,000 with a $200 core. So the total will be $800. Does that sound correct? Never had a diesel before. I will be changing the pump myself as I have no trailer and afraid to start the engine to lift the F E L. Is it difficult to time the pump with the engine? I was told the pump will come timed to T D C of the #1cyclinder and I have to retime the engine. Would there be a good manual you would recommend? Thanks again.

 

[john_bud]

May not apply here, but my kubota won't shut off when the battery is really weak. The solenoid to shut the fuel can't engage, I'm guessing due to low Volts? Anyway, it was pretty confusing and a bit scary at first! But a new battery and all was well.