650 John Deere will not run

Jeffrey A.

New User
650 John Deere Tractor
1.Redid all the hoses, changed the fuel filter, and air filter.
2. Had a runaway. had no response to the throttle.
3. Sent the pump and had it rebuilt and bench tested.
4. Reinstalled the injector pump using the same timing shims.
5. The starter went out and I sent it and had it rebuilt. Reinstalled it.
6. Air freed the fuel system, it kind of tried to start, I put a little gas on a rag and it came close to starting .
7. I did not want to burn the starter, so I had my dad pull me down the road and it would not hit at all.
8. I did note that it seemed to have throttle response, when air freeing the fuel lines you had to push the throttle wide open to get fuel flowing to the injectors. And while pulling it down the road I would go from full throttle to slow and you could here the differance.
9. I read that it does not have a kill solenoid.
10. I did replace the thermostart and it works properly.
11. I did inspect the governor, the weights were on it and free, the collar was free and slid back and fourth.
12.And yes I bought it not running!!
History
1.The guy I bought the tractor from said he was bush hogging and it would choke down and it would not pick back up. So he tore it down and put rings ( only )
 
Did you send the injectors out along with the pump ?
I'd see about getting a compression tester and see what readings you get.
 
(quoted from post at 07:36:56 07/06/18) Did you send the injectors out along with the pump ?
I'd see about getting a compression tester and see what readings you get.

Thanks, Mike I have been sitting here pondering over a pot of coffee and thinking the injectors are the only thing left in the fuel system that I have not fooled with.
 
(quoted from post at 08:20:51 07/06/18)
(quoted from post at 07:36:56 07/06/18) Did you send the injectors out along with the pump ?
I'd see about getting a compression tester and see what readings you get.

Thanks, Mike I have been sitting here pondering over a pot of coffee and thinking the injectors are the only thing left in the fuel system that I have not fooled with.

Mike ,I just pulled the injectors and hooked them up out of the hole and they both sprayed good! Looking more like compression.
 
If it does not have a kill solenoid, then is the cable pushed in to stop the engine? Also does this model have a decompression lever to help in cold temps for starting?
 
Injectors are one of the first things I check in a diesel especially with unknown history. Pressures and spray pattern are VERY important.
 
(quoted from post at 07:47:00 07/07/18) Injectors are one of the first things I check in a diesel especially with unknown history. Pressures and spray pattern are VERY important.
I called the guy that rebuilt my injection pump, he told me how to check the injectors, take them out of the hole and hook them back to the fuel line and you can see them spray, they both looked good the next step is check compression. I will have to make an injector dummy to put in the hole to screw my compression gauge on. Also it does not have a compression release or a shut off solenoid. Thanks guys, the guy that I bought it from had just put a set of rings only. I don't know how but I guess he messed this up? I will know shortly. it will take me a couple of days to make a rig to check compression. I would feel better at this point to go through the engine myself and get it right, it will last for years!
I also have a 1972 Ford 4000SU, Two 1953 Ford jubilees constantly working on tractors.
 
(quoted from post at 08:07:43 07/07/18)
(quoted from post at 07:47:00 07/07/18) Injectors are one of the first things I check in a diesel especially with unknown history. Pressures and spray pattern are VERY important.
I called the guy that rebuilt my injection pump, he told me how to check the injectors, take them out of the hole and hook them back to the fuel line and you can see them spray, they both looked good the next step is check compression. I will have to make an injector dummy to put in the hole to screw my compression gauge on. Also it does not have a compression release or a shut off solenoid. Thanks guys, the guy that I bought it from had just put a set of rings only. I don't know how but I guess he messed this up? I will know shortly. it will take me a couple of days to make a rig to check compression. I would feel better at this point to go through




the engine myself and get it right, it will last for years!





I checked the compression today and I had 300# on one cylinder and 100# on the other cylinder.. tear down and rebuild, this is ok , it will be like a new one! I have another tractor on the hook I am going to look at tomorrow! I like my junk!
I also have a 1972 Ford 4000SU, Two 1953 Ford jubilees constantly working on tractors.
 
iI checked out the compression today and found one cylinder @ 300 PSIG and the other @ 100 PSIG. I am going to do a leak down test and then probably a rebuild. but it will be like new. bring the older tractors back to life...
 

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