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Thread: The Sylphon gage

  1. #1
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    Default The Sylphon gage

    Here is a few pics of the action from a lub pressure gage.
    I was interested in the design of the gizzards so I gently took it apart. If anyone has this style gage in worse or unrepairable condition I would like get it for further disassembly of the internal sylphon part. Data to be shared here for member education.
    Attached Images Attached Images
    D2 5u & 3J
    212 9T
    RD4
    D4 7J & 7U
    R4 4G
    Gas 35's
    Diesel 35
    Diesel 40
    Gas 50's 5A
    Diesel 50 1E1755
    D 8800 power unit 9J 6113SP
    LeTourneau D4 tournapull/Q Carryall
    Letourneau D Carryall's
    LaPlant-Choate CAB-97

  2. #2
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    Faunsdale, AL USA
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    Default

    I think you will find there isn't much else to one. The crook shaped extension tube is the pressure transducer. It straightens slightly as pressure increases and that moves the needle.
    D2-5J's, D6-9U's, D318 and D333 power units, 12E-99E grader, 922B & 944A wheel loaders, D330C generator set, DW20 water tanker and a bunch of Jersey cows to take care of in my spare time

  3. #3
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    Default

    Quote Originally Posted by ccjersey View Post
    I think you will find there isn't much else to one. The crook shaped extension tube is the pressure transducer. It straightens slightly as pressure increases and that moves the needle.
    I will take another look, but pretty sure that it isn't a bourdon style. From what I observed, the crook is a wire that attaches to the plunger. The plunger is in contact with a bellows that is soldered to the casting ( see the ring of solder). The plunger is retained with a threaded tube . There may be a internal spring as well. If he wire was a bourdon, then it wouldn't need the other structures it is attached to, like the large cylindrical part of the casting. Sylphon was a trademark of the Fulton company that specialized in controls using a bellows, or as the inventor called it "Sylphon "
    SImilar in ways to the later Stewart Warner gauges in which the bellows is more plainly seen, and acts on a crank shaft piece of wire to move the indicator.
    However I have been wrong before. It is more complicated than it looks, that is why I would like a hopeless case gage action to dig into.
    D2 5u & 3J
    212 9T
    RD4
    D4 7J & 7U
    R4 4G
    Gas 35's
    Diesel 35
    Diesel 40
    Gas 50's 5A
    Diesel 50 1E1755
    D 8800 power unit 9J 6113SP
    LeTourneau D4 tournapull/Q Carryall
    Letourneau D Carryall's
    LaPlant-Choate CAB-97

  4. #4
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    Nov 2006
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    McBEE, SC
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    Default

    http://www.google.la/patents/US2253769

    This is roughly how the action is constructed.

    http://www.google.com.af/patents/US2607228
    This is exactly the N.O.S. Stewart Warner gage that is being sold on ebay.
    D2 5u & 3J
    212 9T
    RD4
    D4 7J & 7U
    R4 4G
    Gas 35's
    Diesel 35
    Diesel 40
    Gas 50's 5A
    Diesel 50 1E1755
    D 8800 power unit 9J 6113SP
    LeTourneau D4 tournapull/Q Carryall
    Letourneau D Carryall's
    LaPlant-Choate CAB-97

  5. #5
    Join Date
    Apr 2007
    Location
    Elkhorn, WI
    Posts
    3,382

    Becky

    Interesting Design!
    Never seen one like that before!
    Thanks for sharing!
    Jeff

  6. #6
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    Sep 2009
    Location
    Asotin, Wa
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    Default Leaky gauge

    Thanks for posting these Stephen. Iíve got a fuel pressure gauge that I took apart to point you did. It leaks around the where the plunger sticks out from the pot. It looks to me like there should be a seal or packing around it. Iím not ballzie enough to tear it down any further.

    Would you like to? As far as Iím concerned itís toast.

    Bruce P.
    Two Ton, Diesel 40, No.11 AutoPatrol , 4G D4, 9U D6, 44A D6B, 17R D6C, 9G D7, 7M D7

  7. #7
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    Default

    Quote Originally Posted by Bruce P View Post
    Thanks for posting these Stephen. Iíve got a fuel pressure gauge that I took apart to point you did. It leaks around the where the plunger sticks out from the pot. It looks to me like there should be a seal or packing around it. Iím not ballzie enough to tear it down any further.

    Would you like to? As far as Iím concerned itís toast.

    Bruce P.
    Bruce, I would like to very much. I think I know what's inside, but I would like to document the exact details, and even be able to make a new bellows and get it to calibrate.
    D2 5u & 3J
    212 9T
    RD4
    D4 7J & 7U
    R4 4G
    Gas 35's
    Diesel 35
    Diesel 40
    Gas 50's 5A
    Diesel 50 1E1755
    D 8800 power unit 9J 6113SP
    LeTourneau D4 tournapull/Q Carryall
    Letourneau D Carryall's
    LaPlant-Choate CAB-97

  8. #8
    Join Date
    Sep 2009
    Location
    Asotin, Wa
    Posts
    1,204

    Default

    Itís all yours, pm me your address and Iíll send it your way.

    BP.
    Two Ton, Diesel 40, No.11 AutoPatrol , 4G D4, 9U D6, 44A D6B, 17R D6C, 9G D7, 7M D7

  9. #9
    Join Date
    Nov 2006
    Location
    McBEE, SC
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    Default

    Quote Originally Posted by Bruce P View Post
    Itís all yours, pm me your address and Iíll send it your way.

    BP.
    Bruce, I got the gage Saturday. I'm itching to get into it for thanksgiving! Thank you.
    D2 5u & 3J
    212 9T
    RD4
    D4 7J & 7U
    R4 4G
    Gas 35's
    Diesel 35
    Diesel 40
    Gas 50's 5A
    Diesel 50 1E1755
    D 8800 power unit 9J 6113SP
    LeTourneau D4 tournapull/Q Carryall
    Letourneau D Carryall's
    LaPlant-Choate CAB-97

  10. #10
    Join Date
    Sep 2009
    Location
    Asotin, Wa
    Posts
    1,204

    Default

    Great, hopefully we can all learn something!

    Bruce
    Two Ton, Diesel 40, No.11 AutoPatrol , 4G D4, 9U D6, 44A D6B, 17R D6C, 9G D7, 7M D7

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