Red Mark on the Tachometer
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  1. #1
    Silver Member
    Join Date
    Apr 2012
    Northern part of AL
    Kioti DK40SE /W FEL

    Default Red Mark on the Tachometer

    As a general rule, should you run the RPM to the red mark on the tachometer when using the PTO for implements? Do you guys use difference RPM for different implements such as a tiller vs. a rotary cutter. Bush hogging in high grass vs. short grass vs. saplings. Thanks.
    Last edited by boomer613; 05-25-2012 at 07:13 PM.

  2. #2
    Super Member Coyote machine's Avatar
    Join Date
    May 2009
    Southern VT
    '10 Kioti DK 40se/hst KL-401 FEL, loaded tires, KB-2485 bhoe, Tuffline TB160 boxblade, Woods QA forks, MIE Hydraulic bhoe thumb & ripper tooth, Igland 4001 winch, & GR-20 Log Grapple. Woods BBX72" Mower. Diamondplate aluminum canopy.

    Default Re: Red Mark on the Tachometer

    The tach red triangle is to mark the peak HP/torque for the tractor's PTO use. It does NOT mean one has to run all implements at that RPM. Some implements like a winch may need the max RPMs in some use and not so high an RPM in other uses. Same with most PTO driven implements. Some require maximum torque and some don't. Some will require it all the time and others won't. Good judgement is needed in any given circumstance to determine the best use of the tractor, operator, and implement- keeping operator safety in mind.
    2010 DK-40se/HST, KL-401 FEL, (reversible cutting edge). Titan Tree Shear. 72" Ratchet Rake. Fit Rite: Top-N-Tilt hydraulics & diverter. HLA Series 2000 7' plow, Aquiline MPC rear chains. Samuri Sickle bar.

    2016 Mechron 2200PS. 2016 Cub Cadet Pro Z 160 AW Steering, Kawa 23.5HP. 2015 Husky 322T AWD Rider, Combi 103 deck. Dr. Brush mower, & 42" lawn deck, & Dr. 6.5HP Trimmer/mower.

    Bunch of STIHL chainsaws: 011x 2, MS192T, MS200T, MS180C, MS230, MS270 (Wood Boss), 038 Farmboss.

  3. #3
    Silver Member krazsk's Avatar
    Join Date
    Oct 2009
    Bobcat CT225, McCormick X10.50H

    Default Re: Red Mark on the Tachometer

    I thought the red mark on the tach marked the rated RPM for the PTO. ie. that is where the 540 RPM pto is running 540 RPM.

  4. #4
    Elite Member MotorSeven's Avatar
    Join Date
    Aug 2005
    NE TENN (Hancock Co)
    Kioti DK40SE Hydro

    Default Re: Red Mark on the Tachometer

    The owners manual doesn't address it. I think it's the max rpms before the rev limiter kicks in. Anytime I have exceeded it(like going down a hill) the engine cuts out until rpms fall below the line.
    2008 KIOTI DK40Se Hydro
    1978 Sling Blade/wood handle

  5. #5
    Veteran Member phiferpharm's Avatar
    Join Date
    Sep 2010
    Fort McCoy, Florida
    Kioti DK45se HST - Rhino 660 4X4 - Snapper Pro ZTR - Craftsmen Chipper/Vac

    Default Re: Red Mark on the Tachometer

    It is the 540 PTO rpm according to the fellow that delivered my DK. As has been noted in some of the other threads DO NOT start your implement with it already at the mark. I start my Bush Hog at the lowest speed I can and then gradually bring it up or close to the mark. You don't need it to be right on it and can run it slower if you wish. My SQ172 seems to operate best about 1 tick lower than the 540 mark.
    Doug P

  6. #6
    Elite Member SSdoxie's Avatar
    Join Date
    Jun 2010
    Cumberland Plateau, TN
    Bobcat CT225

    Default Re: Red Mark on the Tachometer

    Quote Originally Posted by Coyote machine View Post
    The tach red triangle is to mark the peak HP/torque for the tractor's PTO use.
    Coyote is correct here. It is also the point where the PTO is at 540. The design engineers take the point where torque & HP are at their best combined values then based on that RPM gear the PTO accordingly to optain 540.

    CT225 w/7TL QA FEL, 60"tooth dirt bucket, 68" smooth bucket, Pallet Forks, Bale Spear. Hydrualic top llin, QH, 48 RC, 60" tiller, Angle blade, Landscape rake, Carry-all, Post hole auger.

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