Do you "cool down" your equipment?

Discussion in 'Heavy Equipment & Pavement' started by excav8ter, Jul 1, 2013.

  1. ksss

    ksss LawnSite Fanatic
    Messages: 7,170

    Helll if he is working for you and you want the engines cooled down before turning them off, then that's what should happen. If you want him to dance around the machine 3 times before shutting it off, then so it shall be written. Personally if its the machines been working hard, I let it cool down before shutting it off. What can it hurt, to let it idle a few extra minutes.
  2. dozerman21

    dozerman21 LawnSite Bronze Member
    Messages: 1,171

    Those were exactly my 're the boss. I let my trucks and equipment warm up and cool down. Longer on the warm up. It actually drives me nuts when I'm running a machine and I have to shut it off because someone comes up and has a question. Sometimes they have to wait or talk loud.
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  3. Pierre2013

    Pierre2013 LawnSite Bronze Member
    Messages: 1,237

    Get him to read the owner's manual.

    From a Kawasaki manual:

    Warming up - After the engine starts, move the throtle lever on the quipment to halfway between FAST and SLOW. To warm up an engine, run it for 3 to 5 minutes with the throttle lever in the same load position (halfway) before putting the equipment under load.

    Stopping the engine - Move the throttle lever to the SLOW position. Keep running at the idle speed for about one minute.

    I always go by the book... ;)
  4. Cornell

    Cornell LawnSite Senior Member
    from MN
    Messages: 544

    I grease my machines at the end of the day and leave them idle during that time to cool down... also cycle stuff while greasing so it needs to be on. I always let stuff warm up. At lunch I let the machine idle down a minute or 2 or more depending what I was doing.

    Ever started an excavator when it's 0* out? I let the motor warm up for 10 minutes then I slowly work the hydraulics until it isn't so thick anymore. My DX180 has a fuel heater and hyd heater on a toggle so that helps too.

    Usually stuff doesn't get shut off till the end of the day in the winter. Not worth it. Very cold starts are never good for a motor.
  5. t190

    t190 LawnSite Member
    Messages: 144

    i let my 2154 deere processor cool down while i grease at the end of the day in the summer.. i usually reverse my hyd engine fan and blow there dust out of the rad then let it idle, gives the oil more time to run through the coolers and cool down. Seems to work. don't have any crisp hoses or o rings and we work in hot hot dry sumer conditions
    that extra 15 minutes or so a day does add up up on a hour meter over a year. But with jdlink now, Its easy to show high load hours and idle hours and not to worry much about whats on the clock but how hard the machines actually worked in its life.
  6. excav8ter

    excav8ter LawnSite Member
    Messages: 221

    Even if someone stops to talk to me, I leave it run. I will get out and talk if they need to have a short conversation.
  7. excav8ter

    excav8ter LawnSite Member
    Messages: 221

    Yesterday i got on my mini X.....i was about to turn the key and fire it up, when i noticed that the throttle was still wide open from the last time he was on it. :hammerhead:
  8. AWJ Services

    AWJ Services LawnSite Platinum Member
    from Ga
    Messages: 4,281

    I agree. It's your equipment so it shoulc be run your way.
  9. AWJ Services

    AWJ Services LawnSite Platinum Member
    from Ga
    Messages: 4,281

    This is straight off Banks web site. I will ad that on the Turbo drag cars we run the engine is shut down quite often at the end of a full pass when going through the finish line and the turbos will be red hot and glowing.

    You have to let a turbo-diesel idle for two minutes before you shut it off.

    This is a current myth that has a basis of fact stemming from many years ago. It also has a kernel of truth regarding today's turbocharged gasoline engines that operate at higher peak exhaust temperatures than turbo-diesels. In the early days of turbochargers, the turbo shaft was supported by a babbitt bearing that could seize, or even melt, if the engine was shut off immediately after sustained boost conditions where the turbocharger would "heat soak". A two minute cool down at idle allowed the turbocharger to dissipate any remaining spinning inertia, and the oil circulation cooled the bearing and prevented oil "coking" in the bearing area. Turbochargers haven't used babbitt bearings for over 30 years, and today's oils resist coking. Synthetic oils won't coke, period. With a turbocharged gas engine, it's still good insurance to let the engine idle for 30 seconds to a minute to allow the turbo or turbos to dissipate any inertia and to cool the bearing area to prevent oil coking, especially if the engine has been worked hard just prior to shut-down. Of course, using quality synthetic oil eliminates this potential coking problem.

    Today's turbo-diesels are a different story. There is really no reason to "cool down" a turbo-diesel these days, but you won't hurt anything by doing it either. You can still find people who swear you have to do it, but the myth is fading. Maybe they just like to sit and listen to the radio.
  10. Krafty

    Krafty LawnSite Senior Member
    Male, from St. Louis MO
    Messages: 704

    Per 2014 Kenworth truck manual with Cummins engine. As soon as the truck has built proper air pressure you are free to put it in gear and go. As soon as you can safely come to a complete stop and set the parking brake on the truck you are free to shut it off. Now obviously if it is 0* outside you may want to warm the truck up a bit, and obviously you don't shut a machine off at wot...

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