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  1. #1
    Silver Member
    Join Date
    Jun 2006
    Posts
    158
    Location
    Tennessee
    Tractor
    TC34DA

    Default Max. Time for Glow Plugs

    I own a Tz25Da that is getting difficult to start in the colder weather. On the TZ25 there is a light in the dash that stays on for 5 seconds and then goes out when you energize the glow plugs. As long as you hold the key in the glow plug position they are still energized. The New Holland manual states that in colder weather that extra time may be needed for cold weather starts but does not specify a max. time to keep plugs energized. I confirmed that I have voltage to all three glow plugs and checked the continuity after removing the brass jumper bar, everything seems to be as it should . Just looking for opinions for max. on time time so I don't fry them.

  2. #2
    Elite Member
    Join Date
    Mar 2006
    Posts
    3,059
    Location
    Wisconsin
    Tractor
    2003 NH TN70A

    Default Re: Max. Time for Glow Plugs

    Update your profile, it really helps folks to answer any questions. Include your location.
    Bob

  3. #3
    Super Star Member Thomas's Avatar
    Join Date
    Apr 2000
    Posts
    12,086
    Location
    Lebanon,NH.
    Tractor
    Kubota L2800HST w/Frontloader & CC LTX1046

    Default Re: Max. Time for Glow Plugs

    Morning mjonesnh.
    I am going to guess and say your from the granite state???

    There was thread about month an half go w/the same issues your asking...can find the thread. ...come to find out the battery needed replacing,also advice was given almost double the time durning cold...cold weather on the glow plugs....kubota & JD dealer made the statement..."If there a engine heater use it in extreme cold & it will save on start ups"

  4. #4
    Platinum Member
    Join Date
    Nov 2005
    Posts
    647
    Location
    TX
    Tractor
    NH TC 40 A, AC 5020

    Default Re: Max. Time for Glow Plugs

    Bob, I'm curious. Why would someone need that info to answer his question? He is asking what the max time to run glow plugs would be. If he lived in FL or WA it would be the same question.
    Where Bob Wills is still the king.
    102 acres, and nothing but work! Wouldn't change it for anything.

  5. #5
    Veteran Member
    Join Date
    Jul 2005
    Posts
    1,555
    Location
    Southwest VA

    Default Re: Max. Time for Glow Plugs

    on my ford 1710 theres a little coil that you can see glowing on the dash...well you can see it when the sun isnt real bright. anyway, i wait for it to get red then i start the tractor. this usually takes but a few seconds....10 maybe? i dont think that glow plugs keep getting hotter but reach their max temperature pretty quickly...i also think that heating the plugs starts to drain down your battery giving you less juice to run the starter.

  6. #6
    Veteran Member
    Join Date
    May 2005
    Posts
    1,271
    Location
    Balls Creek, NC
    Tractor
    New Holland 1720

    Default Re: Max. Time for Glow Plugs

    Quote Originally Posted by mjonesnh
    I own a Tz25Da that is getting difficult to start in the colder weather. On the TZ25 there is a light in the dash that stays on for 5 seconds and then goes out when you energize the glow plugs. As long as you hold the key in the glow plug position they are still energized. The New Holland manual states that in colder weather that extra time may be needed for cold weather starts but does not specify a max. time to keep plugs energized. I confirmed that I have voltage to all three glow plugs and checked the continuity after removing the brass jumper bar, everything seems to be as it should . Just looking for opinions for max. on time time so I don't fry them.
    If I lived in the North where cold temp start ups are common place I would put a block heater in my tractor. Here in NC it's a non-issue. My 1720 lights up the glow plug dash indicator for perhaps 5 to 10 seconds and she starts right up. But that's in 40 degree weather not 20.

  7. #7
    Elite Member thcri's Avatar
    Join Date
    Jan 2003
    Posts
    4,648
    Location
    Minnesota SE
    Tractor
    New Holland TC29D, 2001

    Default Re: Max. Time for Glow Plugs

    Quote Originally Posted by mjonesnh
    Just looking for opinions for max. on time time so I don't fry them.

    I beleive there is a safety stat on them so you won't burn them out. Check in your book or verify with your dealer. My 29 has this safety. But if you want to be safe do two(2) 10 or 15 second runs on your glow plugs. If that don't work go to three.

    murph
    "This country was founded and built by people with great dreams and the courage to take great risks."

  8. #8
    Elite Member
    Join Date
    Mar 2006
    Posts
    3,059
    Location
    Wisconsin
    Tractor
    2003 NH TN70A

    Default Re: Max. Time for Glow Plugs

    Quote Originally Posted by kossetx
    Bob, I'm curious. Why would someone need that info to answer his question? He is asking what the max time to run glow plugs would be. If he lived in FL or WA it would be the same question.
    If he lived in WI, then cold weather means something different than if he lived in Florida. If his glow plugs are not working in Florida, maybe it is not his glow plugs. I assume he is having trouble starting his tractor. Trouble at 0 degrees is a different problem than trouble at 40 degrees.
    Bob

  9. #9
    Platinum Member DieselMonk's Avatar
    Join Date
    Dec 2004
    Posts
    584
    Location
    Nova Scotia
    Tractor
    New Holland / T4.75 Powerstar & Boomer 1030, Case 580 SM II

    Default Re: Max. Time for Glow Plugs

    Only because he measured voltage and not the amperage on the glow plug, does not mean that the glow plugs are good.
    As for the glow timing... 10sec is o.k. but I wouldn't go longer than 15 sec. I did however preglow once for 10sec, wait 5 sec and glow again for 10 sec with no trouble.

    My 2 cents canadian... only 1 1/2 cent american

    DM

  10. #10
    Elite Member thcri's Avatar
    Join Date
    Jan 2003
    Posts
    4,648
    Location
    Minnesota SE
    Tractor
    New Holland TC29D, 2001

    Default Re: Max. Time for Glow Plugs

    Quote Originally Posted by kossetx
    Bob, I'm curious. Why would someone need that info to answer his question? He is asking what the max time to run glow plugs would be. If he lived in FL or WA it would be the same question.

    I don't know of a manufacture's manual stating a max time and probably for a reason. Your stating the "max time" should be the same, but not, a cold block would allow the glow plugs to run longer before they get to their so called hot point. A warm block they may not have to run as long, so the max time would be different for each area. Check with your dealer or look at the wiring diagram but I am sure glow plugs have a safety on them that automatically resest if they get too hot. I have not checked my manual but was told by my dealer that my TC29D has the safety. I too questioned when it got colder about the length of run time and told not to worry. However, I will need a couple of cycles in colder weather.

    The light the original poster is talking about was told to me by my dealer that is more for a minimum time. Even if you tractor is warm you should run the plugs.


    murph
    "This country was founded and built by people with great dreams and the courage to take great risks."

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