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  1. #1
    Platinum Member KevT's Avatar
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    Apr 2015
    Posts
    997
    Location
    Gilchrist County side of High Springs, FL
    Tractor
    Kubota L3901 HST w/ FEL, ST2046

    Default Proper Idle Time???

    When I was a weee little lad on my Daddy's farm long, long, LONG time ago, he had a Farmall V tire tractor that he always let idle when he got off to do something. He claimed it was a diesel and it only got turned off when you were done with it.

    FAST FORWARD to now

    I have a new kubota L3901 and at 20hrs had to do it's first "Regen". From things I have read here it has to do with letting it idle, and if the RPMs are up it won't happen as often.

    So my question is... Have tractors changed that much? Was Dad full of it? Is it better to turn off my tractor and restart it every time I rest, other wise running at a higher RPM? Or get used to doing a regen every 20 hours

  2. #2
    Gold Member DennisFolsom's Avatar
    Join Date
    Oct 2003
    Posts
    382
    Location
    Central Maine
    Tractor
    John Deere 4600, Craftsman YT4000

    Default Re: Proper Idle Time???

    My JD 4600 is old enough that it doesn't have the pollution control setup that KevT's has. Mine always starts easy and quick, no matter what the weather. However, I still leave mine running unless it's not going to be used for 15 minutes or more.

    It's easy enough on fuel that I'm not worried about the fuel consumption. The engine temperature stays more constant. There is less wear and tear on the battery and starter.
    I'm "going green" - my "4-wheeler" is a John Deere 4600 HST!

  3. #3
    Super Star Member TripleR's Avatar
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    Mar 2009
    Posts
    18,240
    Location
    Missouri
    Tractor
    Kubota M8540HDC, L5740HSTC, BX2200, BX2660, John Deere 425&1025R, Case, Massey Ferguson, Ford

    Default Re: Proper Idle Time???

    If you can find it, there is an old rather lengthy thread on this and I don't think it was ever settled. The added element of Tier IV has probably muddied the water even more and many of us have no experience with them, so our advice may be way off, sorry I couldn't be of help.
    "An opinion should be the result of thought, not a substitute for it." - Jef Mallett

  4. #4
    Elite Member
    Join Date
    Apr 2012
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    3,018
    Location
    Northern Ontario, Canada
    Tractor
    2012 Kioti CK27HST w/cab

    Default Re: Proper Idle Time???

    I am on your Dads' side on this one, whether I am right or not doesn't matter to me. If it is idling, then it is cooling down anyway but doing it slowly and coolant is still circulating.
    Don't steal. The government hates competition.

  5. #5
    Elite Member 4570Man's Avatar
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    Apr 2015
    Posts
    3,542
    Location
    Crossville, TN
    Tractor
    Kubota L3240, Kubota B7100, Kubota F2560, John Deer, F525 Mule 600

    Default

    My tractor luckily doesn't have a regen. I let it idle for a few minutes any longer and I shut it off.

  6. #6
    Veteran Member skyhook's Avatar
    Join Date
    Mar 2013
    Posts
    1,810
    Location
    Canada Ontario
    Tractor
    1996 Kubota L4200 GSTC,(sold) 1994 JCB 210S 4x4x4

    Default Re: Proper Idle Time???

    As usual, your Dad was right.
    As for these new "pollution fighters", I may be concerned about the heat build up.

  7. #7
    Super Star Member TripleR's Avatar
    Join Date
    Mar 2009
    Posts
    18,240
    Location
    Missouri
    Tractor
    Kubota M8540HDC, L5740HSTC, BX2200, BX2660, John Deere 425&1025R, Case, Massey Ferguson, Ford
    "An opinion should be the result of thought, not a substitute for it." - Jef Mallett

  8. #8
    Platinum Member
    Join Date
    Oct 2010
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    897
    Location
    Northern, NJ
    Tractor
    Kubota L45

    Default

    I wouldn't idle anything with a dpf. Do a search on pickup truck forums about the pre def generation of pickup diesels that just had dpf. Some wouldn't stay reliable just driving the trucks around empty let alone idling for hours. Dpf equipped duals like to work. They HATE being idle.

  9. #9
    Member
    Join Date
    May 2015
    Posts
    42
    Location
    Kyneton, Victoria
    Tractor
    Pasquali 934 x 3, Case 580 SLE,

    Default Re: Proper Idle Time???

    Well in my book for newer generation diesels i would let idle to cool down. Two reasons, One If you engine has a turbo and been working, it needs oil to continue to circulate through the bearings to cool and lubricate them. Two The heat built up in the engine block requires circulation to prevent it boiling or hot spots within the cooling jacket.

    The other factor to consider is that plain lubricated bearings, such as those supporting the crankshaft, only wear when the engine is starting. The reason for this is while there is relative movement between the crankshaft and the bearing cups the oil will be drawn in and provide a thin lubricating film. So there is no metal to metal contact while the engine is turning over, once the engine stops, the oil leaks away leaving metal to metal contact ready for startup.

    My 2c anyway

    Cheers Alex

  10. #10
    Platinum Member
    Join Date
    Oct 2010
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    897
    Location
    Northern, NJ
    Tractor
    Kubota L45

    Default

    Run a high quality synthetic oil and you probably will never have to worry about those issues.

    Dpf on the other hand. ..

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