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  1. #1
    New Member
    Join Date
    May 2012
    Posts
    3
    Location
    NY
    Tractor
    New Holland TN75

    Default Transmission Oil Light Won't Go Off NH TN75SA

    I have a New Holland TN75SA tractor where the transmission oil light came on. We have changed the oil pressure switch and the light hasn't gone off. I've been told that the wires have been checked for any pinching as well and nothing was wrong with them. We aren't sure what to check next. The customer, as well as ourselves, would appreciate the help.

  2. #2
    Super Member
    Join Date
    Apr 2000
    Posts
    6,220
    Location
    central New York
    Tractor
    all makes and models

    Default Re: Transmission Oil Light Won't Go Off NH TN75SA

    If you have a shop, did you think to pressure test????

  3. #3
    New Member
    Join Date
    May 2012
    Posts
    3
    Location
    NY
    Tractor
    New Holland TN75

    Default Re: Transmission Oil Light Won't Go Off NH TN75SA

    We have already done a pressure test as well.

  4. #4
    Super Member RickB's Avatar
    Join Date
    Sep 2000
    Posts
    7,485
    Location
    Eastern NY
    Tractor
    Case 885, Ford 4000

    Default Re: Transmission Oil Light Won't Go Off NH TN75SA

    Did you change the correct pressure switch? There are two of the same switch, one for the 4WD and one for the transmission. Trans switch is oriented parallel with the rear axle, 4WD switch is perpendicular to it.
    We have too much gun control.
    What we need is more idiot control.

  5. #5
    Elite Member JasG's Avatar
    Join Date
    Jan 2004
    Posts
    3,204
    Location
    CNY
    Tractor
    Kubota L3240

    Default Re: Transmission Oil Light Won't Go Off NH TN75SA

    I have seen new switches that were bad.

    If it is set up that the switch is a normally closed switch and pressure opens it try disconnecting the switch to see if the light goes out. It it does it is probably the switch if you know the pressure is correct (as Rick stated it could be the wrong one). If not either the panel is bad or you have a short feeding it somewehere.
    “Government is like a baby. An alimentary canal with a big appetite at one end and no sense of responsibility at the other."


    Ronald Reagan

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