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  1. #1
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    Dec 2008
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    Default Glow plug wiring help needed

    Hi Guys,

    I was fortunate to get a good deal on a L35, It only has a couple of issues. The main one is electrical. First problem was a faulty alternator, after reading here I ordered a replacement from Pats small engines.

    I think what caused the Alt to fail is the glow plug controls. Most of the time the glow plug light (and plugs too) stays on all the time. I think this has caused the alt to run overloaded all the time and damaged the alternator.
    Today the glow plugs didn't come on untill I pulled the dash and knocked the relays a bit, now it seems to stay on all the time again.

    From searching here it seems there must be a timer that is supposed to shut the glow pulgs off.
    I am looking for the location of that control. It looks like there is also a Glow plug relay.
    Does anyone have the wiring diagram for these and the relay/timer location?

    I just picked this up this week so I don't have a manual yet-Is there any online manuals?

    Once I get the information I will see just what is wrong and figuire out if I will replace the timer or just rewire it to a momentary switch I will manually use to heat up the glow pulgs thru a relay.

    Thanks

    Jerry

  2. #2
    Platinum Member atgreene's Avatar
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    Aug 2007
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    872
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    Sebago, Maine
    Tractor
    2005 TB135 Excavator with Thumb, Quick Attach System, Ripper tooth, 3' Hydrauic Tilt Clean-up Bucket, Skeleton Bucket, 1986 Kubota 4150 with Loader and Quick Attach with Woods Forks, JD B, 1963 IH 504

    Default Re: Glow plug wiring help needed

    You may want to bypass the relay and timer and make your own set-up to manually use the glow plugs only as needed. I have done this a few times. Use a heavy relay/solenoid (the existing one may work, or a new 80-100 amp rated relay) a normally off momentary contact switch and wire it to the solenoid/relay. This allows you to control how much you glow plug and when. I found it works much better than any automated system.

    On edit: switch http://order.waytekwire.com/productdetail/M37/44006

    Solenoid: http://order.waytekwire.com/productdetail/M37/77020
    2009 Kubota M7040, cab
    2005 Takeuchi 135 excavator
    1963 Oshkosh 4819
    2013 GMC 3500 6.0 w 9-2 Boss V Fisher poly Sander.
    IH 504, JD B, Ford 2n, Farmall cub, Gehl 1475 Round Baler, JD 640 rake, Vermeer 2500 Bale Wrapper, Zetor 185 Drum Mower, New Idea 217 manure Spreader, Kuhn 4 star tedder, Farmi 501 winch.
    Local 740 Portland ME
    20 Scottish Highland Beef Cattle, 3 Herefords, 3 Goats, 2 Alpacas, 2 Llama, 140+- layers, and lots of maple trees.
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  3. #3
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    Dec 2008
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    21

    Default Re: Glow plug wiring help needed

    Exactly what I was thinking atgreene,
    I've got an account at Grainger so I can pick up a weather proof switch and relay if I need one.
    What I would like is to have the wiring diagram and timer location so I can rewire without tracing all the wires out behing the dash.

    Jerry

  4. #4
    Elite Member rbargeron's Avatar
    Join Date
    May 2000
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    2,723
    Location
    MA
    Tractor
    L5450, L48, L3250, L345

    Default Re: Glow plug wiring help needed

    On the Grand L's (similar - maybe identical glow plug control) the starter switch is turned until the glow plug indicator comes on and then later goes off, then the switch is turned further to start.

    The parts list for the L3600 shows a timer T0070-31410 ($72) and a controller 16415-65660 ($62) These two are mounted back-to-back to the glow plug relay 16415-65600 ($26). All three pieces are mounted with 2 bolts inside the body behind the dash panel on the right side. The coolant temperature sender on the engine might be the problem - 16415-83040 ($23).

    Depending on what's defective, a simple glowplug/starter switch without any relays or timers might be a cheaper fix. The older kubota models used a simple 3-position switch to send power to the glow plugs and/or the starter. The L345 switch is 37150-32200 ($35) plus knob 37150-32210 ($5) - It is wired direct to the glow plugs in one position and in the other it powers the starter circuit too. (On these models the glow plugs also get power whenever the starter runs)

    Kubota parts lists are available by email from Tractorsmart.com
    Last edited by rbargeron; 12-25-2008 at 09:03 PM.
    L345, L3250, L48, L5450, never enough attachments

  5. #5
    New Member
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    Dec 2008
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    21

    Default Re: Glow plug wiring help needed

    Thank You rbargeron,
    I appreciate the info and part #'s.
    Since I don't have any wiring diagrams I can check out the relys etc. and compare to the part #'s you have given.
    It will help a lot.

    Jerry

  6. #6
    Veteran Member
    Join Date
    Sep 2004
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    2,499
    Location
    Kansas, Butler county, Just east of DooDah
    Tractor
    Kubota L4200 GSTCA

    Default Re: Glow plug wiring help needed

    Jerry...
    This is the layout on Grand L's. I think rbargeron is right, should be the same...
    I reduced the file sizr so they will fit. KennyV.
    Attached Thumbnails Attached Thumbnails Glow plug wiring help needed-dashelectrical-jpg   Glow plug wiring help needed-dashelectrical1-jpg   Glow plug wiring help needed-dashelectrical2-jpg   Glow plug wiring help needed-dashelectrical3-jpg  

  7. #7
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    Default Re: Glow plug wiring help needed

    KennyV, you the man.

  8. #8
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    Dec 2008
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    Default Re: Glow plug wiring help needed

    Just a follow up to say thanks for you guys help. The glow plug controller was faulty. I decided I would rather have a toggle switch to control the glow plugs with rather than a new controller.
    I picked up a 3 position toggle switch (one position is momentary) DPDT plus a weather cover ($17 total) and with the help of KennyV's wiring diagram wired it in a Auto-Off-Hand configuiration.
    Auto- leaves all in original condition
    Off- drops power to the glow plug control
    Hand- (momentary) drops power to the glow plug control and completes
    ground circuit to glow plug relay to operate glow plugs

    Works great and someday when I pick up a new controller I can just change that out and it will work normally if I want.

    Jerry

  9. #9
    Veteran Member
    Join Date
    Sep 2004
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    2,499
    Location
    Kansas, Butler county, Just east of DooDah
    Tractor
    Kubota L4200 GSTCA

    Default Re: Glow plug wiring help needed

    Jerry,
    I'm glad to hear you are up and going
    If you can, post a schematic of your change for those that may want to do the same instead of springing the $70 for a controller. Kenny

  10. #10
    New Member
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    Jun 2013
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    1
    Location
    Moskow
    Tractor
    G 1900

    Default Re: Glow plug wiring help needed

    Quote Originally Posted by KennyV View Post
    Jerry...
    This is the layout on Grand L's. I think rbargeron is right, should be the same...
    I reduced the file sizr so they will fit. KennyV.
    hi, do you have a diagram of the relay only?Glow plug wiring help needed-dashelectrical2-jpg
    labeled parts

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