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  1. #1

    Join Date
    Jun 2002
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    75
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    Illinois
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    JD 4010

    Default Is it better to run your engine at higher RPMs

    I was reading a post at the lawn and tractor forum and there is quite a discussion about damage that might occur if you do not operatw your engine at the RPM's it was designed for.

    Specifically for tractors that have hydro trannies. Some of the issues are about leaving the tractor at a higher idle so the hydro fluid keeps pumping and stays cool.

    This sort of concerns me. I tend to idle down when not doing heavy work. Should I keep the idle up? There is a considerable difference in noise and fuel consumption.

    Will I hurt anything operating the way I do?

  2. #2
    Dob
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    Sep 2002
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    Loganville, GA
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    Yanmar 2210, Farmall B

    Default Re: Is it better to run your engine at higher RPMs

    No answer here, but I await the responses too. My "zone" is 2200-2300, but, it just feels and sounds right at 2000. Big caveat - this is my first tractor & diesel! Still, it just feels right...
    Dob

  3. #3
    Super Member ronjhall's Avatar
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    Apr 2000
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    7,117
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    SE Michigan, TX when its cold in MI.
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    Kubota 2910 HST

    Default Re: Is it better to run your engine at higher RPMs

    Brent
    I did a quick search using “engine rpm” came up with a lot of threads discussing this concern.
    One was one Lugging the Engine. <A target="_blank" HREF=http://www.tractorbynet.com/cgi-bin/compact/showflat.pl?Cat=&amp;Board=owning&amp;Number=65754 &amp;page=&amp;view=&amp;sb=&amp;o=&amp;vc=1>Cl ick Here</A>.
    Another was on ” Never idle a diesel??..” <A target="_blank" HREF=http://www.tractorbynet.com/cgi-bin/compact/showflat.pl?Cat=&amp;Board=owning&amp;Number=87838 &amp;page=&amp;view=&amp;sb=&amp;o=&amp;vc=1>Cl ick Here</A>.

    I did not find anything specific to HST. But they did discuss the load that can be put on the engine when HST is pushed to maximum at low rpm’s
    I run my engine rpm about 1800 rpm’s most of the time. Except when using an implement that is supposed to be run at PTO speed.

  4. #4
    Platinum Member
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    Sep 2002
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    669
    Location
    Alachua, Florida
    Tractor
    JD 790, JD 6420

    Default Re: Is it better to run your engine at higher RPMs

    I think that you will be best served by reading your Tractors manual .. one manual I read said don't waste the fuel ... all have said get the rpm up soon after starting ... up ranges from about 1100 rpm to 1200 rpm ... but this is where you should read your manual and follow their advise. Don't lugg any engine ... you will over stress the thing and damage can occur ... I have always worked a tractor some where around the PTO speed and used the gearing and impliment performance to determine the gear and therefore the speed (always operate the tractor in a safe maner .. that should go without saying) ... sorry for being so long winded ...

  5. #5
    Super Member
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    frank_f15's Avatar
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    Mar 2001
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    BUFFALO ,NEW YORK AREA
    Tractor
    kubota b2400- R4 tires

    Default Re: Is it better to run your engine at higher RPMs

    i usually run my rpm up around 1800 or 2000 when doing fel work, and of course at pto rpm when using implement that requires it.i warm it up at about 1200 and never idle it below 1000 rpm and only fort short periods.

  6. #6

    Join Date
    Aug 2002
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    39
    Tractor
    JD 4100

    Default Re: Is it better to run your engine at higher RPMs

    Rus, I'm no expert, but have read that running diesels too cool can harm the engine much more than the minimal wear of the designed engine speed. Sometimes you need to run at a lower RPM because of the PTO speed, but your diesel needs to get up to the proper operating temperature before you slow it down. When in those conditions, I speed the engine up between PTO operations, to help keep the temperature up. Usually I prefer the recommended engine speed, just because the hydro is faster and cycle times are faster for the FEL. Best of luck. Jon

  7. #7

    Join Date
    Jun 2002
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    75
    Location
    Illinois
    Tractor
    JD 4010

    Default Re: Is it better to run your engine at higher RPMs

    Thanks for all of the replys. I can see that the waters here are pretty cloudy but for the most part I think I am hearing it is better to run on the high side than the low.

    Thanks all

    Brent

  8. #8
    Super Member
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    frank_f15's Avatar
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    BUFFALO ,NEW YORK AREA
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    kubota b2400- R4 tires

    Default Re: Is it better to run your engine at higher RPMs

    <font color=orange> YEP!</font color=orange> u got it right [img]/w3tcompact/icons/smile.gif[/img]

  9. #9
    Dob
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    Yanmar 2210, Farmall B

    Default Re: Is it better to run your engine at higher RPMs

    Noted.
    Thanks!

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