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  1. #1
    New Member
    Join Date
    Jan 2013
    Posts
    2
    Location
    United States
    Tractor
    New Holland 1725

    Default New Holland 1725 Starting problem

    I have owned the tractor for 9 years. (bought new) recently the key switch failed and I replaced it. At the same time starting was a problem. The glow plug light comes on. The tractor takes much cranking and produces blue grey smoke but no start until it has been cranked for some time. Runs fine after that. Do I have to take the injector tubes off from all three plus their origin in order to remove the plug? Any other ideas for problems? Thank you.

  2. #2
    Gold Member
    Join Date
    Jan 2012
    Posts
    341
    Location
    Winchester Ky
    Tractor
    Allis Chalmers ED 40

    Default Re: New Holland 1725 Starting problem

    I would suspect that the glow plugs are not getting power. The light may be on, but maybe the system is not actually powering the glowplugs. You should check them with a testlight or voltmeter before replacing anything. I'm not sure about your injector tube question - the glow plugs should be threaded into the cylinder head, one for each cylinder with wires connecting them in a parallel circuit. 12v should be present at each when the switch and relay/timer are activated. Removing the injector lines may provide a bit more access to them should their removal be necessary, but will require more bleeding and cranking when reinstalled later, so with starting an issue already, I would not disturb them if at all possible.

  3. #3
    New Member
    Join Date
    Jan 2013
    Posts
    2
    Location
    United States
    Tractor
    New Holland 1725

    Default Re: New Holland 1725 Starting problem

    [QUOTE=Harry in Ky;3167421]I would suspect that the glow plugs are not getting power. The light may be on, but maybe the system is not actually powering the glowplugs. You should check them with a testlight or voltmeter before replacing anything. I'm not sure about your injector tube question - the glow plugs should be threaded into the cylinder head, one for each cylinder with wires connecting them in a parallel circuit. 12v should be present at each when the switch and relay/timer are activated. Removing the injector lines may provide a bit more access to them should their removal be necessary, but will require more bleeding and cranking when reinstalled later, so with starting an issue already, I would not disturb them if at all possible.[/QUOTE Thank you for the reply. Dave]

  4. #4
    Gold Member pedalstomper78's Avatar
    Join Date
    Aug 2010
    Posts
    449
    Location
    Ohio
    Tractor
    Case/IH DX33

    Default Re: New Holland 1725 Starting problem

    Dave,
    Use a test light to see if you are getting power there as Harry said. If not, do the usual and check the fuses etc, but you may have a faulty timer. I've heard of lots of guys having the same type of issue. Not a cheap piece, but you can get it here.
    New Holland Glow Plug timer relay SBA385870301
    Messicks also has it.
    The forums are a great place to find information....but also a great place to find speculation. Only you can determine the real problems with your tractor. We're here to help you find the correct way to do it.

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