2007 MEP-806B no-start

[kadetklapp]

Picked up a 2007 MEP-806B for our police department back in January. Unit has 13.6 hours on it according to the meter. John Deere won't fire up. Put fuel in it, showing nearly half a tank on the screen. Cleared the fault codes, put two new 850 CCA batteries in it, and still nothing. It will pop and fart on the cold-start ether switch, but it's just detonating it's brains out. Cracked open the top of the water separator and fuel rolls out a bit. Starting to think the electronic governor/throttle is bad or the IP is junk.

 

[Dock Rocker]

Have you gone through any of the troubleshooting steps in the TM?


Sent from my iPhone using Tapatalk

 

[96m1083]

It may have lost its prime, loosen each injector fuel line nut, turn it over until fuel seeps past the nut then tighten nuts back down, if that works it should run like **** but will clear up in a few minutes

 

[96m1083]

Does this model have banjo bolts holding the fuel lines to the filter housing? If so, the banjo closest to you should have a little screen filter, probably got trash in it from being moved around and got clogged

 

[kadetklapp]

Have you gone through any of the troubleshooting steps in the TM?


Sent from my iPhone using Tapatalk

"Notify Next Higher Level of Maintenance" doesn't really help me much.

 

[kadetklapp]

Does this model have banjo bolts holding the fuel lines to the filter housing? If so, the banjo closest to you should have a little screen filter, probably got trash in it from being moved around and got clogged

I'll take a look. Thanks for the tip. I've never cracked injectors on a diesel, so wish me luck.

 

[Dock Rocker]

"Notify Next Higher Level of Maintenance" doesn't really help me much.

Is there only a unit level TM? Even the unit level should have some troubleshooting to get you through common no start issues.

Exactly what have you done from the TM so we can help your further?


Sent from my iPhone using Tapatalk

 

[kadetklapp]

I've gone to the Deere manual. So far I've cracked the fuel filter housing, and got some bubbly fuel out. I ran the primer till it was a steady stream. I primed again, then no start. Next I cranked the IP return line open, and primed the system, got quite a lot of fuel out, still no start. I have NOT cracked the injectors at the top of the motor yet. I do not feel comfortable doing it with the tools I have, and it's difficult in the cabinet to get any leverage. I'm afraid I'll strip or round off something. I did crack one of the lines coming out of the IP going to one of the cylinders and fuel dripped out, but no response from the hand primer.

 

[155mm]

Since this unit is new to you, make sure you ground it, a pair of jumper cables to a chain link fence is good enough until you know that the angry pixies stay in.

Next are you starting it correctly?

https://youtu.be/U-RWshepFRk

Have you read any of the other threads on here for 805b's?

https://cse.google.com/cse?cx=partn...steelsoldiers.com/search.php?searchid=6339354

 

[155mm]

No need to purge at the injectors, back of the pump is good enough

 

[Guyfang]

"Notify Next Higher Level of Maintenance" doesn't really help me much.

That means use the -24 manual.

 

[kadetklapp]

Well, I'm using the one manual I got.

So far I'm thinking the electronic governor or solenoid is junk, as in it's not allowing the IP to do it's job. Opening the panel and looking at the boards isn't very telling. No red lights on, no overspeed, no fault lights I can see. About to wash my hands of it. We're a small department and do not have $1500 for John Deere to come out and work on it.

 

[Guyfang]

I've gone to the Deere manual. So far I've cracked the fuel filter housing, and got some bubbly fuel out. I ran the primer till it was a steady stream. I primed again, then no start. Next I cranked the IP return line open, and primed the system, got quite a lot of fuel out, still no start. I have NOT cracked the injectors at the top of the motor yet. I do not feel comfortable doing it with the tools I have, and it's difficult in the cabinet to get any leverage. I'm afraid I'll strip or round off something. I did crack one of the lines coming out of the IP going to one of the cylinders and fuel dripped out, but no response from the hand primer.

Please, use the military TM's. This is normally a simple problem. Normally, you cranking it a while, should have cleared out air. The very first thing to do is Check the Magnetic pick up. If its missing, maladjusted, fouled, or unserviceable, The Injector pump will not let the unit start. Now, Try starting it, and look, or have someone else look at the Electronic actuator. Will it move when you turn on S1?

 

[Guyfang]

Are you in front of the gen set?

 

[Dock Rocker]

Did you put fresh fuel in it?


Sent from my iPhone using Tapatalk

 

[Guyfang]

Well, that went south for the winter fast.

 

[Guyfang]

I hope they sell it to someone we know.

 

[kadetklapp]

The IP is dead, likely the switch on top of the injection pump. I became familiar with the fault clear switch early on.

 

[kadetklapp]

Did you put fresh fuel in it?

Sent from my iPhone using Tapatalk

Yes.

 

[155mm]

Please, use the military TM's. This is normally a simple problem. Normally, you cranking it a while, should have cleared out air. The very first thing to do is Check the Magnetic pick up. If its missing, maladjusted, fouled, or unserviceable, The Injector pump will not let the unit start. Now, Try starting it, and look, or have someone else look at the Electronic actuator. Will it move when you turn on S1?

https://www.steelsoldiers.com/showthread.php?173099-Manuals-for-the-MEP-806B



there are all the manuals you need for your set, minus the -14.

test the actuator first, the troubleshooting for it is #7. unless you already did test it to find it was faulty, I have only found 2 actuator that failed out of many, not including the operator error failures ie yanked out wires, stripped out fuel lines.




did you test and adjust the magnetic pickup? the -14 tm is too large to upload here, but liberatedmanuals has it.

http://www.liberatedmanuals.com/TM-9-6115-672-14.pdf

for magnetic pickup removal, cleaning, testing..... start on page 337



More times than not, the problem lies with the MPU, its been a joke of, if it doesnt start check mpu, if its out of fuel, check the mpu. MPU has deadlined more generators than actual faults.