Results 1 to 5 of 5
  1. #1

    Join Date
    Jan 2003
    Posts
    46
    Location
    New Zealand
    Tractor
    IH 574

    Default testing a temperature guage

    Hi there,
    Just wondering if anyone knows how I could test a temperature guage to see if it is operational. My tractor is in a million bits at the moment and the gauge was disconnected long before I pulled the tractor apart so I dont know if the gauge works or not.

    Thanks,
    Glenn

  2. #2
    Super Star Member RoyJackson's Avatar
    Join Date
    Nov 2001
    Posts
    18,298
    Location
    Bethel, Vermont
    Tractor
    John Deere 4400 MFWD, Deere 855D UTV and assorted implements

    Default Re: testing a temperature guage

    You've have to rig it to a 12 volt auto battery (or 6 volt, if that's your system's voltage).
    Then put the sender in a pan of water. Heat the water to boiling (212 at sea level).

    That should put you in the ball park.

  3. #3
    Elite Member
    Join Date
    Jul 2003
    Posts
    3,373
    Location
    Goffs Corner, KY
    Tractor
    IH 2444

    Default Re: testing a temperature guage

    If your temp gauge is the capillary tube type ( no electricity required ) Do not crimp the tube or it will could be ruined. Use the boiling water method to check.

  4. #4
    Super Member RickB's Avatar
    Join Date
    Sep 2000
    Posts
    7,211
    Location
    Eastern NY
    Tractor
    Case 885, JD 730D, Ford 4000

    Default Re: testing a temperature guage

    If you are using Roy's method on a single wire electrical sender, run a ground from the sender's body to the voltage supply's ground.

  5. #5

    Join Date
    Aug 2002
    Posts
    7,386
    Location
    North East CT
    Tractor
    2003 Kubota BX-22

    Default Re: testing a temperature guage

    If the gauge is the older capillary tube type, putting it in a pot of hot water will tell you if it is working, but will not tell you the accuracy unless you also check the temperature of the water with a known correct thermometer.
    If the gauge is a electrical gauge with a sensor that screws into the water jacket of the engine, you will need to know what the circuitry of the system is. Some use a sensor that is opened to ground to turn on a signal light commonly known as a "idiot" light. Others operate a gauge that is marked from "cold" to "hot" or in vague indication of degrees. Some of these are mounted in dash pods that have built in voltage regulators that "feed" a specific amount of voltage to the gauge. If you put the wrong amount of current to the gauge or the sender, you could damage the unit and render it useless. Considering that the rest of the tractor is in "parts", I would work on getting everything back together and leave this for last and do a "live" test when the engine is together. This would be the safest way if it an electrical unit in my opinion.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
© 2013 TractorByNet.com. TractorByNet is a registered trademark of IMC Digital Universe, Inc. Other trademarks on this page are the property of their respective owners.