JD 5105 not staying primed

[Birddog Dave]

Hello, I have a 2004 Jd 5105. Lately it has not been holding a prime. Requiring starting fluid when I first try to start it. after sitting longer than a couple days. Today, are you starting fluid? It took longer than usual to prime. When it did run on its own. It was running a little rough. So my bright idea was to pump the primer a few times. To see if it just needed some help priming. It puffed a big bowl of white smoke and died. Now it will not prime at all. It’ll only run on the starting fluid. Which I know is not great for it. Any help is greatly appreciated.

 

[Harry in Ky]

https://partscatalog.deere.com/jdrc/sidebyside/equipment/4367/referrer/navigation/pgId/3011063

Does this look like what you have? If so, a few things come to mind. Filter (item 29) first on the list. Next, how full is the tank when this is happening? The hand primer pump? Have you opened that up and cleaned out any obstructions? Your tractor has no supply pump so the injection pump has to pull fuel up from the tank, through the filter and up to the engine so it doesn't take much interference to cause problems. Fuel supply is always in question with that type system. An inline check valve down near the filter will help keep fuel from draining back when fuel level is low. Also and electric fuel pump can do wonders with that sort of problem. I've installed dozens of them for that very reason.

 

[Quebecguy]

The filter, item 29 mentioned in the previous post, is located just behind the valve cover at the rear of the motor (at least it is on my 5205).

 

[Birddog Dave]

I’m familiar with it. I will check it out this morning. Do you think I could have damaged the inj pump? By trying to prime while running.

 

[dodge man]

I’d also check your fuel lines carefully. Any cracks could be letting air in.

 

[Birddog Dave]

Primer had a hole in diaphram. I ordered the replacement on Amazon. It Was not the right thing to do. As the aftermarket has the little check diaphragm on the wrong side of the bottom diaphram plate. Had to re-order through John Deere. Ran fine for 10 minutes. Now unit has shut down again. Will only run on ether thru intake.

 

[Harry in Ky]

Have you confirmed there's power to the injection pump solenoid? That's another issue these tractors are well known for. Totally unrelated to what you've been fighting with, but still not to be overlooked.

 

[Birddog Dave]

Have you confirmed there's power to the injection pump solenoid? That's another issue these tractors are well known for. Totally unrelated to what you've been fighting with, but still not to be overlooked.

The solenoid does not have power going to the fuse.

 

[Harry in Ky]

Then that's a different problem. Look for this sender in the thermostat housing and unplug it. Then look for any blown fuses in the ignition circuit, replace them and see what that gets you.

https://partscatalog.deere.com/jdrc/sidebyside/equipment/4367/referrer/navigation/pgId/2091475

 

[Birddog Dave]

Thanks Harry, I had unplugged the cold start harness a few years ago.
I am getting 12 volts to all the fuses, except the alt. Fuse and the fuel solenoid fuse. I’m headed down to the field shortly with more tools than I had yesterday. To see if I have a bad connection. It is weird to me, that everything else is at 12v. I was thinking a bad switch or interlock.

 

[Birddog Dave]

The alt and fuel solenoid fuses are reading 0.55 volts on the multi-meter.

 

[SatchmoIsBack]

I don't know squat about John Deere but I know that Diesels with a HPFP can be very sensitive when it comes to filters and filter housings. I'd check there, Thoroughly, and work from there. Diesels require three things to run - Fuel, Air and Compression. The HPFP (HighPressureFuelPump) is a wonderful invention but it brings certain headaches with it. It's why they go for $2,700 new. On your tractor

Make absolutely certain you're running an OEM fiter and check the housing for cracks or leaks. I've seen more problems with aftermarket filters on diesels than almost anything else. Except for maybe the emissions garbage, which you shouldn't have much of anyway. If at all.

Good luck.

 

[Birddog Dave]

Thanks, I think that I have narrowed it down to not getting voltage to my fuel shut off solenoid. Possibly a bad ground or connection. I’m just having a hard time finding the culprit.

 

[Birddog Dave]

Does anyone know if this unit has a separated relay for the Inj pump solenoid?

If so, Where is it located. I have only found 1 relay and 2 other relay-ish items inside the console by the fuse box. The one relay tested fine.

 

[Quebecguy]

Does anyone know if this unit has a separated relay for the Inj pump solenoid?

If so, Where is it located. I have only found 1 relay and 2 other relay-ish items inside the console by the fuse box. The one relay tested fine.

I'll attach a copy of the manual page showing the locations of some of the relays but to troubleshoot your problem correctly you should acquire a manual. The up front cost may seem like a lot but will pay off in the long run if you wish to do your own repairs.

 

[Birddog Dave]

Two of the six relays that are in the left side of the console tested bad. I swapped them around and was able to get voltage to the shutoff solenoid. Ordered from the dealer.

 

[Birddog Dave]

I'll attach a copy of the manual page showing the locations of some of the relays but to troubleshoot your problem correctly you should acquire a manual. The up front cost may seem like a lot but will pay off in the long run if you wish to do your own repairs.

Thanks for your help!