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(Topic ID: 182136)

Coils, when to replace them?

By hocuslocus

7 years ago



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    #1 7 years ago
    OP
     
    GEM

    hocuslocus

    Pinside+ Pro!

    8y 81,800 1,797 13

    I was playing gofers and it seemed extremely difficult to make it onto the second playfield. I checked the resistance of the coil compared to a brand new coil and they were identical. The coil itself checked out, the sleeve wasn't binding and everything looked normal. I recently replaced everything else on the flipper except for the base. I replaced the coil with a brand new one and holy crap what a difference. it was nowhere near as sluggish and I could easily make it onto the second playfield.

    I know most games you probably wouldn't notice, or maybe it wouldn't matter as much. I might adopt a new rule about age.

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    #2 7 years ago
     
    BLY

    MrBally

    Pinside member

    US Paradise, NV

    12y 141K 13,926 22 1

    Not unless it got hot. Coil sleeves, OTOH, are a wear item.

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    #3 7 years ago
     
    AAA

    pintechev

    Inactive member

    11y 91,300 4,437

    Coils don't get weaker. They either work or they are shorted/broken. There's nothing in the middle.

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    #4 7 years ago
     
    LTG

    LTG

    Pinside member

    US Hopkins, MN

    12y 191K 56,939 24 7

    Resoldering the solder on the wires to the new coil may have been the difference.

    LTG : )

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    #5 7 years ago
     
    CAT

    DCFAN

    Pinside+ Frequent

    US Chantilly, VA

    12y 148K 12,776 34

    Perhaps it was a cracked solder joint at a terminal of the coil.

    EDIT: Darn it, LTG beat me by 10 seconds.

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    #6 7 years ago
     
    CNK

    CNKay

    Pinside member

    US East Aurora, NY

    14y 72,050 3,452 12 10

    I'll take all your worn out old coils!

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    #7 7 years ago
     
    TBK

    xTheBlackKnightx

    Pinside member

    8y 128K 4,097 137

    The only time an owner should consider replacing coils is when you cannot replace plastic coil sleeves inside them.

    This is caused by repeated overheating and stress. This can sometimes indicate other problems that need to be checked.

    The coil may not fail but a plunger as part of an assembly can get stuck in the forward or activated position.
    Even coils windings or leads that were damaged can often be repaired.

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