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  1. #1
    New Member
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    Nov 2011
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    14
    Tractor
    new holland tc40

    Default Glow plug relay and timer

    Hi Guys; I have a New Holland TC40 with a glow plug system that does not function. All the fuses are OK. I would like to know which relay is the timer and which relay is for the glow plugs. I have located all the relays under the dash but do not know what is what. Also the hour clock has stop working, am I getting younger? Thanks in advance for all your help!!!!!!!
    Albert

  2. #2
    Super Star Member RoyJackson's Avatar
    Join Date
    Nov 2001
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    18,845
    Location
    Bethel, Vermont
    Tractor
    John Deere 4400 MFWD, Deere 855D UTV, Z920A Zero Turn Mower and assorted implements

    Default Re: Glow plug relay and timer

    Welcome to TBN!!!

    There is a New Holland forum...those folks can best answer your question...but, don't you have the operators manual? The fuses and relays should be explained in the manual.
    Roy Jackson

    "Any government that does not trust its citizens with firearms is either a tyranny, or planning to become one."
    -Joseph P. Martino

  3. #3
    New Member
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    Nov 2011
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    Tractor
    new holland tc40

    Default Re: Glow plug relay and timer

    Hi Roy, I just bought the Tractor and do not have a shop manual as of yet. Would like a recommendation on which to buy. I am going to do a full service before I put the beauty to work.
    Thanks for your reply....Albert

  4. #4
    Super Star Member RoyJackson's Avatar
    Join Date
    Nov 2001
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    18,845
    Location
    Bethel, Vermont
    Tractor
    John Deere 4400 MFWD, Deere 855D UTV, Z920A Zero Turn Mower and assorted implements

    Default Re: Glow plug relay and timer

    Quote Originally Posted by pepperalbert View Post
    Hi Roy, I just bought the Tractor and do not have a shop manual as of yet. Would like a recommendation on which to buy. I am going to do a full service before I put the beauty to work.
    Thanks for your reply....Albert
    The factory manuals are, IMHO, the best...even if you have to pay more.
    BTW, in the Deere world, the CD-ROM manuals are considerably cheaper then the paper manuals.
    Roy Jackson

    "Any government that does not trust its citizens with firearms is either a tyranny, or planning to become one."
    -Joseph P. Martino

  5. #5
    Epic Contributor
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    jinman's Avatar
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    Feb 2001
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    Texas - Wise County - Sunset
    Tractor
    NHTC45D, NH LB75B, Ford Jubilee

    Default Re: Glow plug relay and timer

    Albert, I've attached an illustration that should help you. The red box is around your glow plug timer. Item #10 is the glow plug relay, but most often it is the timer that fails. This diagram is from the HST model tractor, but the relays for the glowplugs are in the same place on your tractor. You can buy the timer from your NH dealer for around $70, but a couple of people have said that they took the cover off and found a broken wire inside that was repaired fairly easily and saved them the price. Also there is a NGK replacement on eBay for around $14.
    Attached Thumbnails Attached Thumbnails -allrelays2-jpg  
    Jim


  6. #6
    New Member
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    Nov 2011
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    Tractor
    new holland tc40

    Default Re: Glow plug relay and timer

    Hi Jim,
    YOU ARE THE MAN!!!!!!!!!+ ONE.
    Found the timer relay, tested the glow plug relay, ordered the the part from E-Bay.
    Life is good and there is a smile on my mug!!!!!
    Thanks Albert

  7. #7
    New Member
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    Dec 2012
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    4
    Location
    loveland, CO
    Tractor
    New Holland tc45d

    Default Re: Glow plug relay and timer

    Has anyone seen an inexpensive timer for TC45D recently? Will the kubota model S81NL Work in the New Holland. Saw some place where it will substitute but have my doubts. Thanks!

  8. #8
    Gold Member pedalstomper78's Avatar
    Join Date
    Aug 2010
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    450
    Location
    Ohio
    Tractor
    Case/IH DX33

    Default Re: Glow plug relay and timer

    I've found two of them. Not sure that inexpensive is the way to put it though.
    Messicks has it for $77
    Case / New Holland TIMER Part #SBA385870301
    Tractor Help has it for $71.
    Replacement Parts - TC45D - TC45 - TC Series - New Holland

    I honestly haven't seen a substitute.

  9. #9
    Epic Contributor
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    jinman's Avatar
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    Texas - Wise County - Sunset
    Tractor
    NHTC45D, NH LB75B, Ford Jubilee

    Default Re: Glow plug relay and timer

    The only differences between the kubota timer and New Holland's is the length of the glow and price. The contacts and electrical connections are identical. The NH timer is designed for fast heating glow plugs and has a 5-7 second cycle. I think the Kubota cycle is 10 seconds. . . no big deal. I have two Kubota's for spares, but have not tried them, but others have successfully substituted them. The timer does not supply current directly to the glow plugs on our tractors. It only energizes the high current relay.

    BTW: Kubota charges over $60 for that relay at a dealer. It just goes to show you what a markup there is on these parts. I have replaced $75 relays on my NH TLB with a $9 part from Grainger that is an exact duplicate except for mounting. My cheap relay came with a tab for mounting with a screw. Otherwise, there is no difference. Evidently there was some excess Kubota inventory that ended up on eBay. I found glow plug timers for just over $10 each and that included shipping. The Kubota kit even comes with a glow plug lamp, but of course, you have no use for that on the New Holland. It also comes with mating connectors and contacts. It's one heck of a deal. The next time I have my cowling off, I'm gonna swap out the relay just to test it, but I can see no electrical difference between the two.
    Jim


  10. #10
    Silver Member
    Join Date
    Jan 2011
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    115
    Location
    Philippi WV
    Tractor
    farmall cub John Deere 310 Backhoe Loader Ventrac 4131

    Default Re: Glow plug relay and timer

    I used to run to the dealers for everything. Now I search the net with numbers off the part I want to replace. Takes a few more days but I always have other jobs to do until the part comes.

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