MEP-1050 Fault Code 3665

@peapvp great eyes on the wire. To me, that frayed wire looks as if it is almost burned in the photo.

peapvp said:

Better get your reading glasses out

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That's for sure. That manual you guys provided is 1,328 pages and it sure bounces around a lot, but I am thankful you could provide it to me.

Otherwise I just wanted to check in and let you guys know where I am at since my last post.

1. New circuit breaker installed. Found the part I needed with a reasonable price ($54) at Powerwerx.com. Needed to remove the front cover's 24 10mm bolts to get to the back of the mounting screws because they had nuts and they fell off behind the wall that the circuit breaker is mounted to.
2. Dicoovered that the air cleaner housing is missing the bottom and filter element. Could not find only the bottom so ordered a whole new air cleaner housing from dpequip.net ($115). The gauge that is to indicate the filter is getting dirty is also missing but I have not located that yet. I think the new air cleaner housing has a cap over this threaded coupling so I may not need this gauge right away. Ordered the filter element from amazon ($19), I hope that I ordered the right one.
3. Ordered the banjo bolt and two washers/seals from dieselpartsdirect.com ($11 banjo bolt, $2 each washers).

I expect these parts in about a week, possibly sooner.

BTW, I hope it is OK that I put the vendor's where I ordered my parts from in this forum. I have no affiliation and have no kick backs from that, I just want to provide it in case someone else also needs to source the same parts I did.

I also have a question:
On the control panel screen the oil pressure indicator is dark. I don't know how to better explain it, but most of the other indicators are lit. If this was a computer you could say the oil pressure gauge is "greyed out". I would provide a photo but the batteries are removed right now.
I thought that this gauge could be off because the engine is not running. Is that the case?

BadAmish said:

That's for sure. That manual you guys provided is 1,328 pages and it sure bounces around a lot, but I am thankful you could provide it to me.

Otherwise I just wanted to check in and let you guys know where I am at since my last post.

1. New circuit breaker installed. Found the part I needed with a reasonable price ($54) at Powerwerx.com. Needed to remove the front cover's 24 10mm bolts to get to the back of the mounting screws because they had nuts and they fell off behind the wall that the circuit breaker is mounted to.
2. Dicoovered that the air cleaner housing is missing the bottom and filter element. Could not find only the bottom so ordered a whole new air cleaner housing from dpequip.net ($115). The gauge that is to indicate the filter is getting dirty is also missing but I have not located that yet. I think the new air cleaner housing has a cap over this threaded coupling so I may not need this gauge right away. Ordered the filter element from amazon ($19), I hope that I ordered the right one.
3. Ordered the banjo bolt and two washers/seals from dieselpartsdirect.com ($11 banjo bolt, $2 each washers).

I expect these parts in about a week, possibly sooner.

BTW, I hope it is OK that I put the vendor's where I ordered my parts from in this forum. I have no affiliation and have no kick backs from that, I just want to provide it in case someone else also needs to source the same parts I did.

I also have a question:
On the control panel screen the oil pressure indicator is dark. I don't know how to better explain it, but most of the other indicators are lit. If this was a computer you could say the oil pressure gauge is "greyed out". I would provide a photo but the batteries are removed right now.
I thought that this gauge could be off because the engine is not running. Is that the case?

Click to expand...

If you mean it looks like this



Double check that oil pressure sensor is connected and wire is good.

I took this picture during a update with Unit on bench and only 24 VDC applied

peapvp said:

If you mean it looks like this

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@peapvp - Yes, your screen looks exactly like mine - Oil Pressure greyed out also 3664 & 3664 errors.

I imagine that the old pressure sensor is on the engine somewhere and connects to the control panel.

If your control panel is showing the 3665 fault code because it is not connected to the unit, is it possible that mine is also disconnected somehow/somewhere?

BadAmish said:

@peapvp - Yes, your screen looks exactly like mine - Oil Pressure greyed out also 3664 & 3664 errors.

I imagine that the old pressure sensor is on the engine somewhere and connects to the control panel.

If your control panel is showing the 3665 fault code because it is not connected to the unit, is it possible that mine is also disconnected somehow/somewhere?

Click to expand...

@BadAmish - that's what I am suspecting at the moment, connectivity problems. Could be a corrosion problem of the canon plugs as well.
You have to crawl through every nook and cranny on this Genset.

peapvp said:

@BadAmish - that's what I am suspecting at the moment, connectivity problems. Could be a corrosion problem of the canon plugs as well.
You have to crawl through every nook and cranny on this Genset.

Click to expand...

@peapvp - Roger that. What did they used to say - "It's not a job, it's an adventure".

Of course I'd like to get this bad boy running, but I also have to confess that I am enjoying learning and working on it. If it wasn't so hot out there lately I'd have more updates to share. It also seems that every time I open it and look around I find more parts missing. So I order what I find and wait for them to arrive to install. Rinse and repeat.

I think when that new air cleaner unit arrives and I have to remove the old one I will check the turbo. I see in the manual that there are specs for runout and such. I don't have any dial indicators so I hope I can just feel if there seems to be excessive play by hand.

I'm having trouble locating a part that was lost in shipping. It is the NATO slave receptacle cap shown in this photo:



I searched the manual you folks provided but did not see it mentioned, or maybe I missed it?

Part number 11675004 NSN 5340-01-059-0114 aka "Slave Cap Assembly" I believe. Available from many sources, you can try searching for "nato 1 pin slave receptacle cap"
e.g. https://www.eriksmilitarysurplus.com/naslrecowrec.html

All the best,

2Pbfeet

2Pbfeet said:

Part number 11675004 NSN 5340-01-059-0114 aka "Slave Cap Assembly" I believe. Available from many sources, you can try searching for "nato 1 pin slave receptacle cap"
e.g. https://www.eriksmilitarysurplus.com/naslrecowrec.html

All the best,

2Pbfeet

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@2Pbfeet - Thank you. Did you find it in the manual? If so, can you tell me which page?

What manual number did you use to try and find the cap?



This is figure 2 of TM 9-6115-751-24&P. As you can see, it doesn't show an ITEM number for the cap. So the NSN and Part Number will not be found here. Soooooooooooo, you have to look elsewhere. One way to do it is to look in other parts TM's, as a part like this is the same, NO MATTER WHERE YOU LOOK. Your new and don't know that. Another way is just what you did. Ask. Post #48 gave you a place, and key search words to find it in several locations. Problem solved. And you made the right answer. More or less, "Show me". So maybe we need to "Show you." You need to get better acquainted with the TM's. Thats the reason I asked the question listed before the picture.

BadAmish said:

@2Pbfeet - Thank you. Did you find it in the manual? If so, can you tell me which page?

Click to expand...

You are welcome. The learning curve at the beginning is often steep.

No, I did not find it in the manual, for as @Guyfang pointed out above, the part called out there is for the entire assembly, but in general that part number and description would give you a starting point for a search, if you didn't already know what the part was called. One might have started with the whole assembly part number as a search, and that would (sooner or later) lead you to what your part was called, and from there it is often fairly easy to surface the actual item, though some of the truly generic descriptions that the military uses to describe many, non-interchangeable parts can be a swamp at times. That leads to a reliance on NSN, with the understanding that NSNs can be replaced over time with different NSNs to do the same thing.

However, in this case, the part you want is a standard connector (the "NATO" part is a bit of a hint), so a web search of NATO slave receptacle cap or NATO slave receptacle cover will surface the part itself, the part number, the NSN, and suppliers. As an aside, NATO connectors come in one pin and two pin variants, which are not interchangeable.

Does that help?

All the best,

2Pbfeet

Lets start simple. This is long winded, but might help you understand the TM’s.

TM 9-6115-751-10
This is the operators manual. The number -10 at the end of the TM number tells you that. The Obi Wan Kenobi of Army Power Generation once told me that if you are not ready to READ the TM’s for the AMMPS generator sets, you might as well Quit fooling with them. So you are going to need to sit down and read. NO, not everything. But a lot. Skim through the -10 TM. You will be surprised at how much you will remember later. Keep in mind, that this TM is written to cover a 60 hertz and 400 hertz machine. So make sure you read the passage that is pertaining to your model, MEP-1050, and NOT MEP-1051.

Chapter #1. tells you what the thing is, and explains the sub systems of the set.

Chapter #2, tells you how to Properly operate it. You need to read those two chapters at least twice.

The Chapter #3. is the operator Troubleshooting. Do not expect to find help for every single thing that could conceivably happen. You would need a dump truck to carry your TM’s and CD’s with. Its a general help, for some of the most common problems. When you hit a brick wall, it will tell you to „Notify the next higher level of Maintenance.“

Chapter 4. is PMCS. Preventive Maintenance, Checks & Services. This tells you how to keep this gen set happy and running for long time periods. It tells you the checks to be made before, durring and after operation. It tells you what you need to check and how to check it. And what to use to make the set smile. How to service it.

Chapter #5. can be read at a later date. Dont get me wrong. Its full of good info. But for you right now, not so important.


TM 9-6115-751-24&P

This is a combined TM. The first part covers Maintenance. Turn to page 24 and READ the “How to use this Manual.” It pays to get smart on how the TM is used. Work Package is from now on called WP.

Chapter #1, WP 0001, (General Information) up to WP 0001-11 you can skim. A lots is just BS.

Chapter #1, WP 0002, (Equipment Description and Data) Is good info for someone new to the set. Skim/read up to WP 0002-11

Chapter #1, WP 0003, (Theory of Operation) Explains how things SHOULD work.

Chapter #2, (Field Maintenance Troubleshooting) is for when you hit that brick wall while troubleshooting in the -10 TM, that’s when you dig out the -24&P. Field Level is for the Generator Mechanics in the unit, the second level of maintainers. It has lots more troubleshooting help in it, than the -10. But still can NOT cover it all. Pay heed to the DCS Fault/Warning Codes. Your screen will give you a failure code and the list is here in this section. When you hit a brick wall, it will tell you to „Notify the next higher level of Maintenance.“ That means there is another level of Troubleshooting deeper in the book.

The rest of the Maintenance portion of this TM is laid out kinda like the -10 TM. But if you do not know how to use the TM, its not going to help you a lot. So take this one step at a time, and you will get the hang of it.


Now, the second part of this TM. The parts manual. It starts at Chapter #6. Do read WP 0100, (RPSTL INTRODUCTION) This could save you much confusion and maybe money. Why? Because the TM covers the MEP-1050 and MEP-1051. I could bury you under all the good info in the WP 0100. The most important part is the UOC. Usable On Code. It tells you when a part is specifically for one model or the other. There are a few parts that are NOT interchangeable. The MEP-1050 has a UOC of 98J. The MEP-1051 has a UOC of 98K. If there is no UOC listed, that part can be used in both sets.

Now, whats the rest of the info listed for Figure 23, Item #18. Look it up





NSN: 6115-01-588-7317
CAGCE CODE: 44940, the Manufacturer code, or better said, name.
Part number: 0201-3649-02
Part Nomenclature: Rotor, Generater
UOC: 98J

And the last number to the right? That tells you how many of this part is in the entire generater set. Not important for the Rotor. But if you are ordering screws to hold the top on, very handy

After the RPSTL is the wire schematics, and lots more info. But thats for another time.