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Thread: MEP004a Generator, Parts ID, Xfmr

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    Default MEP004a Generator, Parts ID, Xfmr

    Transformer, Low Voltage, T3, on 50/60 Hz Static Exciter chassis.
    I need the stock number to search for it. The part number or spec is not stated in the manual that I have. It simply says "transformer."
    Looking into Jack 9 on the Exciter box front panel the primary is shunted by a 510 ohm wire wound resistor, R2. The primary is labeled H1, H2.
    The secondary labeled X1, X2, leaves the exciter chassis by plug/jack 11 and enters the Voltage Regulator Board. The secondary drives 4 didoes in a bridge CR12,13,14,and 15.
    It is part of the sensing circuit.
    If I had to guess, the primary would see 120 vac, while the secondary would develop 24 vac to 48 vac?
    Since it has opened there is no way to determine/measure the secondary voltage. If I knew what the proper secondary voltage was, I could secure a transformer from an air conditioning supplier, or parts store and mount it on the exciter chassis. (It looks like a 24V air conditioner transformer). If someone has an operating MEP004a, and is a cowboy, the secondary voltage can be determined by first checking the primary voltage that appears across R2. Then view the secondary voltage found at X1 to X2 terminals. That will give us the turns ratio to buy a proper transformer. I'm hoping that will make it work. Thanks, Joe.

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    OK, what TM were you using to look up the part? I looked it up, and there is a NSN, so lets get on the same sheet of music. What TM, and figure number, Item number are you looking at?

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    Default MEP-004a, T3, Exciter

    Quote Originally Posted by Guyfang View Post
    OK, what TM were you using to look up the part? I looked it up, and there is a NSN, so lets get on the same sheet of music. What TM, and figure number, Item number are you looking at?
    The PIN:072239-001, manual, back page. paper
    Army TM 9-6115-464-34, 18 Jan 1994, same manual, front page. paper
    a pictorial diagram:
    page 3-271....Fig 3-130 Static Exciter...item #45. It rests just behind the big wire wound resistors.
    then on page 3-273, Fig 3-130 sheet 3 of 3, called "transformer"
    a schematic diagram:
    page 3-274...Fig. 3-131 50/60 Hz Static Exciter.... DWG No. 72-2629, the bottom "STATIC EXCITER" schematic diagram. Located in the lower left hand corner at the very bottom
    is T3.
    Thanks for your help, Joe

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    Joe,

    I believe you need to look at TM 9-6115-464-24P to get the PN's.
    The TM 9-6115-464-24P I have is dated 9-July-1992
    The exploded diagram with ref #'s is on page 137.
    Parts numbers are listed on page 141 and on.
    MEP-831A Governor Controller Replacements for the SLC100, 2990-01-477-1371, 98-19539.
    https://www.steelsoldiers.com/showth...90#post2233190

    MEP-802A/MEP-803A Remote Start Kits

    https://www.steelsoldiers.com/showth...92#post2233192
    MEP-802A, Two MEP-831A's

    MEP-831A Battery Charger Repair & Repair Kits
    https://www.steelsoldiers.com/showth...83#post2231683

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    6115-00-363-3957 STATIC EXCITER CLD, CLF EA 1
    72-2601 30554 CZL
    30554-72-2601 36024

    From Guy's library.....https://www.steelsoldiers.com/showth...n-the-MEP-004A

    TM 9-6115-464-24P

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    Beat me AGAIN, Kurt!!!

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    Quote Originally Posted by kloppk View Post
    Joe,

    I believe you need to look at TM 9-6115-464-24P to get the PN's.
    The TM 9-6115-464-24P I have is dated 9-July-1992
    The exploded diagram with ref #'s is on page 137.
    Parts numbers are listed on page 141 and on.

    Exactly. The -34 is a pure maintenance manual.


    Figure #34, Item # 41
    NSN: 5950-00-600-0843
    Description: TRANSFORMER
    Part # 72-2618
    Alt Part # 369B209G01
    Cost: ABT 25.00

    RELIABILITY INDICATOR NOT ESTABLISHED
    MOUNTING HOLE DIAMETER 0 187/1000 INCHES NOMINAL SINGLE GROUP
    FREQUENCY RATING 50 HERTZ MINIMUM SINGLE COMPONENT AND 400 HERTZ MAXIMUM SINGLE COMPONENT
    INPUT-OUTPUT PHASE RELATIONSHIP SINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT
    BODY LENGTH 2 33/100 INCHES NOMINAL
    BODY WIDTH 1 33/50 INCHES MAXIMUM
    BODY HEIGHT 1 47/50 INCHES NOMINAL
    DISTANCE BETWEEN MOUNTING FACILITY CENTERS 2 203/250 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP
    INCLOSURE TYPE FULLY INCLOSED
    MOUNTING FACILITY QUANTITY 2 SINGLE GROUP
    MOUNTING METHOD FLANGE SINGLE GROUP AND UNTHREADED HOLE SINGLE GROUP
    WINDING FUNCTION AND QUANTITY 1 PRIMARY SINGLE COMPONENT AND 1 SECONDARY SINGLE COMPONENT
    WINDING OPERATING VOLTAGE 102 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE SECONDARY
    WINDING OPERATING VOLTAGE 120 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY
    TERMINAL TYPE AND QUANTITY 4 TAB, SOLDER LUG

    Do you have all the TM's downloaded?

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    Default Transformer, T3 Exciter board

    Quote Originally Posted by Guyfang View Post
    Exactly. The -34 is a pure maintenance manual.


    Figure #34, Item # 41
    NSN: 5950-00-600-0843
    Description: TRANSFORMER
    Part # 72-2618
    Alt Part # 369B209G01
    Cost: ABT 25.00

    RELIABILITY INDICATOR NOT ESTABLISHED
    MOUNTING HOLE DIAMETER 0 187/1000 INCHES NOMINAL SINGLE GROUP
    FREQUENCY RATING 50 HERTZ MINIMUM SINGLE COMPONENT AND 400 HERTZ MAXIMUM SINGLE COMPONENT
    INPUT-OUTPUT PHASE RELATIONSHIP SINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT
    BODY LENGTH 2 33/100 INCHES NOMINAL
    BODY WIDTH 1 33/50 INCHES MAXIMUM
    BODY HEIGHT 1 47/50 INCHES NOMINAL
    DISTANCE BETWEEN MOUNTING FACILITY CENTERS 2 203/250 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP
    INCLOSURE TYPE FULLY INCLOSED
    MOUNTING FACILITY QUANTITY 2 SINGLE GROUP
    MOUNTING METHOD FLANGE SINGLE GROUP AND UNTHREADED HOLE SINGLE GROUP
    WINDING FUNCTION AND QUANTITY 1 PRIMARY SINGLE COMPONENT AND 1 SECONDARY SINGLE COMPONENT
    WINDING OPERATING VOLTAGE 102 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE SECONDARY
    WINDING OPERATING VOLTAGE 120 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY
    TERMINAL TYPE AND QUANTITY 4 TAB, SOLDER LUG

    Do you have all the TM's downloaded?
    Yes, TM's downloaded, thanks.
    You are right the -34 manual is maintenance.
    24P manual lists parts. excellent. printed page 143 on paper
    stock number 5950-00-600-0843

    When I look at the xfmr in the bright sun that has just returned to Houston, I can make out 72-2618 through the rust....just barely.
    That says we are on the right track.
    If my memory serves me correct this transformer may take American 120Vac in the US to 100Vac found in Japan.

    sources I gathered so far:

    part number 72-2618, Correct Craft Inc, Afcon Products,
    part number 369B209G01, Cegelec Automation Inc., Electric Machinery
    part number 43674, Freed Transformer Co.
    part number 40-12488, Magnetic Components, Inc.
    part number 42297 Coast/ Advanced Chip magnetics, Inc
    part number TP-2003, Hytronics Corp

    these are suggestions...cross reference, and leads.... but not tested and confirmed on my end.

    Do you have any suggestions for sources for the transformer?
    Deeply appreciated....Joe

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    About 12 different firms sold this transformer to the gov.
    I live in Germany, so sources might not help you from here. Just put the NSN and part numbers in your browser. Something will come up.

    another helpful hint. The 004A and 005A are about 80-90% the same. Don't limit your self to just 004A, when looking.

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