John Deere R

[prvtpilot]

Can someone help me resolve a fuel problem on my John Deere R. The injectors are not getting diesel, we loosened the fuel lines at the injectors and turned the tractor over with the pony engine, no fuel. We also checked the fuel lines for blockage all the way to the filters, no blockage. We also installed new fuel and fuel filters.

The small lift pump beside the fuel filters is pumping fine, but the fuel is not getting past the injector pump on top of the engine.

Something somewhere has the fuel shutdown, maybe the injector pump is bad? We also removed the fuel filter assembly, and examined the rod that delivers fuel up to the injector pump, the rod appears loose...maybe it should be that way. Any ideas would be much appreciated.

 

[Mike M]

Check and see that the throttle linkage is not stuck or binding and that the injection pump rack is moving freely and opening up. The rack controls the fuel to the injectors.

 

[prvtpilot]

Where is the rack? Thanks for your input.

 

[Mike M]

It is on the bottom of the injection pump assy. and the pumps are in a compartment in the top of the block. I think an R is like the rest of the diesels ? As you have someone work the throttle lever you should be able to see the rack move.To one end it is shutoff and then as it goes farther open more fuel is allowed to the injectors.

 

[prvtpilot]

It doesn't move, how does one free it up? I think we're close to resolving this! Thanks

 

[BushogPapa]

Be sure you don't remove the steel (cast) cover from the governor on the side of the tractor, on the side of the governor casting..or it all will fall out of place...!!

You can see numbers on the rack, if you wipe them off..they are small rods with numbers on them, to indicate the "rack setting"...
Normally set to "10" at Full throttle, on an "R".
If you really have to check the governor, you need to remove the TOP of the governor compartment (Cast steel).
It can be removed, after you remove the troottle shaft..I think it has to be released from the front of the governor compartment, from under an access hole...Might have been a snap-ring..
The injectors should be figured to be "good", if it ran before you cracked the lines..
ANY air in them can be a real pain to get out, and may take several "beedings", once it is running again..
Have Faith, it will run again..!!
Ron.

 

[Mike M]

I would be gentle with it so as not to get it bent. I never had an R apart that far,but on the other diesel models there is a plug in the side of the block with a return spring in there. If you have that maybe you can pull it out and stick a rod or something in there and see if you can move it by hand. Is your linkage moving from the throttle lever down to the governor ?

 

[prvtpilot]

Yes, the linkage moves to the govenor.