justacitizen
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can someone confirm for me that the J10 plug on the lower control box on an 003a is the two wires that carry 24 VDC to the generator to excite the generator?
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J10 plug on 003A
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justacitizen
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what kind of wire do they use
I have an MEP 003A that has been sitting in the corner for a number of years that i got running yesterday. the problem i have found is at plug J 10 the plug between the output box has two wires separated on the inside of the plug. i need some wire so i can cut the plug out of the harness and reconnect the two wires. my question is what kind of wire are these harness made of? is it stainless steel? where can i purchase some so i can complete the job?
Thanks
I have an MEP 003A that has been sitting in the corner for a number of years that i got running yesterday. the problem i have found is at plug J 10 the plug between the output box has two wires separated on the inside of the plug. i need some wire so i can cut the plug out of the harness and reconnect the two wires. my question is what kind of wire are these harness made of? is it stainless steel? where can i purchase some so i can complete the job?
Thanks
Triple Jim
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It's tinned copper, with the size shown as part of the wire number. It wouldn't be stainless steel, because of that material's poor conductivity.
I'm sorry, but I don't know where you can buy wire with the same jacket as the original. I don't bother, but use good quality PVC jacketed wire when I need a piece somewhere.
I'm sorry, but I don't know where you can buy wire with the same jacket as the original. I don't bother, but use good quality PVC jacketed wire when I need a piece somewhere.
justacitizen
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MEP 003A exciter
on my 003A in the lower output box there is a J 12 connector that has two wire going to the exciter in the gen end. inside the box the two wires were broken loose at the connector and i need to know what wire corresponds to the other wire on the other side of the connector. the wires are numbered on the inside of the box but the two that enter the gen end arent labeled. these are the wires that excite the field when the switch is held in the start position. can anyone with a schematic help?
on my 003A in the lower output box there is a J 12 connector that has two wire going to the exciter in the gen end. inside the box the two wires were broken loose at the connector and i need to know what wire corresponds to the other wire on the other side of the connector. the wires are numbered on the inside of the box but the two that enter the gen end arent labeled. these are the wires that excite the field when the switch is held in the start position. can anyone with a schematic help?
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J-12
Doesn't matter, one way or the other. But if you want, look inside the J-12. The pins are marked. A & B
F1 connects to J-12A.
F2 connects to J-12B.
J-12A connects to wire number P67B16
J-12B connects to wire number P60G16
Why don't you have a schematic? They are all uploaded in the SS Technical Manual section.
Doesn't matter, one way or the other. But if you want, look inside the J-12. The pins are marked. A & B
F1 connects to J-12A.
F2 connects to J-12B.
J-12A connects to wire number P67B16
J-12B connects to wire number P60G16
Why don't you have a schematic? They are all uploaded in the SS Technical Manual section.
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Whats the wire numbers?
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6145-00-284-0657 WIRE,ELECTRICAL: 8 AWG,WHITE FT VM5086/2-8-9 (81349)
6145-00-578-7514 WIRE,ELECTRICAL: 12 AWG,WHITE A,C FT VM5086/2-12-9 (81349)
6145-00-578-6605 WIRE,ELECTRICAL: 16 AWG,WHITE FT VM5086/2-16-9 (81349)
The last two number on a wire number is the wire size. The above listed wire types are aircraft grade wire, normally used in gen sets. Like Triple Jim stated, you can also use a good quality PVC jacketed wire.
When looking for items in the TM like wire, first look for a wire harness. Then, if you look at the SMR Code, (Source, Maintenance, Repair code). You will notice that the parts listing shows no NSN for most wire harnesses. The first two letters of the SMR code are MF. That means the item is not normally stocked, and you have to manufacture it yourself. All parts needed to manufacture the wire harness are then listed below. Aircraft grade wire is available. Kinda expensive, but it's GREAT stuff.
Why not try repairing the wires? Its kinda a PITA, but at the end of the day, a better repair. You have to remove the wire harness, restrip the wire, heat the back side of the pin and remover the broken off wires. Then just reverse the process. Unse some good past on the wire ends and pin ends. You can even slip on a piece of heat shrink to ensure the pins will not arc out/short out. If the wires are a tad too short, then maybe cut a wire tie or two.
6145-00-578-7514 WIRE,ELECTRICAL: 12 AWG,WHITE A,C FT VM5086/2-12-9 (81349)
6145-00-578-6605 WIRE,ELECTRICAL: 16 AWG,WHITE FT VM5086/2-16-9 (81349)
The last two number on a wire number is the wire size. The above listed wire types are aircraft grade wire, normally used in gen sets. Like Triple Jim stated, you can also use a good quality PVC jacketed wire.
When looking for items in the TM like wire, first look for a wire harness. Then, if you look at the SMR Code, (Source, Maintenance, Repair code). You will notice that the parts listing shows no NSN for most wire harnesses. The first two letters of the SMR code are MF. That means the item is not normally stocked, and you have to manufacture it yourself. All parts needed to manufacture the wire harness are then listed below. Aircraft grade wire is available. Kinda expensive, but it's GREAT stuff.
Why not try repairing the wires? Its kinda a PITA, but at the end of the day, a better repair. You have to remove the wire harness, restrip the wire, heat the back side of the pin and remover the broken off wires. Then just reverse the process. Unse some good past on the wire ends and pin ends. You can even slip on a piece of heat shrink to ensure the pins will not arc out/short out. If the wires are a tad too short, then maybe cut a wire tie or two.
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J-12 has that function.
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J-10 is the big cannon plug to the main gen.
Triple Jim
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Right. I just looked at the schematic, and J10 carries power from the main generator to the rest of the system. Do you have a copy of the schematic? The best one I've found is on page 39 of the PDF file TM5-6115-585-34.pdf
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Roger that! Some of the schematics are terrible. They have been copied so often, that some are real hard to read.
justacitizen
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thanks! i confirm it is the J12 plug indeed
justacitizen
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Thanks! my schematic didn't have the info that the A-B were identified in the plug and i didn't want to wire anything in reverse. now when i reconnected them and checked for voltage at the pins i have 24 vdc when the start switch is engaged but no excitement on the generator. what do you think the problem is now?
justacitizen
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thanks. i have another thread going that i am going to roll this info into http://www.steelsoldiers.com/showthread.php?164093-MEP-003A-exciter
