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Thread: How many hours on your diesel engine equipment and how many do you expect to get?

  1. #1
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    How many hours on your diesel engine equipment and how many do you expect to get?

    Type of equipment, make of engine, hours on it and your expectations of how many hours before major rebuild? Past experiences of hours before rebuild, thanks!

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    Senior Member liebherr1160's Avatar
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    If i remember my fleet maintainence where i used to work ..it was every 5000hrs or 500,000 mile that the machine got a in-frame.. these were tractors and straight trucks...Cummin's,Cats, International diesel ,Detriot 60 series,Ford Diesel, and Scania Diesel

    now there were a few that got it a little sooner others got replaced...but it was a rare event ....lots of oil changes and PH monitoring of the coolant and coolant filter's
    Last edited by liebherr1160; 03-11-2009 at 06:46 PM.
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    4000 to 5000 on turbocharged engines in the heavey equipment.The non turbo engines go longer,maybe 10000 hours.Depends alot on what the equipment is used for,how well its serviced,etc.

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    Senior Member LonestarCobra's Avatar
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    As a general rule we always shot for 16,000 to 18,000 hours between overhauls on the equipment running the 3400 and 3500 series CAT engines. Usually the 980C,and G loaders and D8N's with the 3406 ran closer to the 18,000 hour range. The 992C and D loaders with the 3412, and the 988B loaders with the 3408, usually did not run as long getting 14000 to 16000 hours. The 992G's and 777C's and 777D's had the 3508 engine and we were always in the 18000+ hour range when they were overhauled just because it was time. Engine oil was changed at 250 hour intervals. Also, we always replaced rod and main bearings, turbos, and oil pumps at 9000 hours. The D300 Dresser haulpack trucks had the Cummins 2300 engine and they usually gave up about 3500-4500 hours, right after the transmission quit. I had customers running D6D's and D6R's with the 3306 engines up to and over 15,000 hours with no problems. Some would go cheap and in frame, and some would go all the way with them. My haul trucks have the 3406C Cats and both have about 700,000 Miles. They are running good still. We rolled a set of rod and main bearings in them at 500,000 miles. The old Autocar tandem winch trucks have the 855 Cummins are needing an overhaul and they have about 400,000 miles on them. That is normally what I have seen on the equipment that I personally have been involved with. There have been 2-3 exeptions when we had an engine blow up at 3000 hours.

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    I have to agree with LonestarCobra on those approximate lives for engines. I will add that the smaller equipment doesn't usually get that amount of time so things like skid steers, mini excavators and loader backhoes usually wear out the implements long before the engines.

    I'm curious about transmissions in equipment. I've seen Cat loaders run 12,000 to 15,000 hours to a bearing and seal overhaul. I've seen big Komatsu loader transmissions run 30,000 hours. What about some others.

    Excavators generally are about all worn out at 15,000 or less hours. The competition was also so stiff the last few years that they were traded away at 6,000 to 9,000 hours. I've seen many Cat log loaders run up in the 20,000 hour range with a replaced pump and engine. I've not seen that in any other woods machine except than big yarders.

    I got out of highway trucks years ago. Back then 250,000 miles was the standard place to roll in bearings and 500,000 miles was usually an overhaul. It has apparently gotten much better.

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    I know that most recommended 200 250 hrs on engine oil, but I like to change at 100 hrs. + Filter. Oil is still cheeped than engine failure. This will work fine on small fleets of equipment, I have 12 engines. We don't overhaul we change oil instead, if I can't get it changed on time another 25-75 hrs is ok. Now with 250 oil change and you can't get it done you could get 300 hrs or more. If there is an antifreeze leak I may catch it before I lose a bearing in 250 hrs. I also use Extended Life Chevron 5 year that requires no additives for life 5 yrs. I think most small operators do service at regular intervals, over worked, no time, not important. I also recommend treating with TFE after break in, been doing this for 25 years. I guess 20,000 hrs or more since I cannot find ware. Oh yes all the rest of the oil compartments need regular service to.
    I always doubt much maintaince on used that say new engine, that's a negative to me.

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    Senior Member DPete's Avatar
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    I always figured we were on borrowed time after 14K hours

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    I was operating a 988b a while back with 21000hrs, but in all fairness I think it was 2- 3K late for a total out of frame job. A fair bit comes down to the duty cycle of the engine, for instance an "A" rating (ie continous full load) engine such as a 3412 in a pumping application may do 20000 hrs with little down time but the same 3412 in a "D" rating such as a large pleasure boat will do possibly a lot less as there maybe 1000HP difference between them . Just my 2 cents. Cheers.

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    In my opinion with the engines today I would expect no less than 12000 hours out of an engine with proper maintenance. If you are not getting close to that I would say you are doing something drastically wrong.

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    Senior Member LonestarCobra's Avatar
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    I'm curious about transmissions in equipment. I've seen Cat loaders run 12,000 to 15,000 hours to a bearing and seal overhaul. I've seen big Komatsu loader transmissions run 30,000 hours. What about some others.

    We always re-bearing and re-seal the transmissions, finals, and differentials, and go thru the brakes on the 777 trucks and 992G loaders when we re-build the engine. As far as a transmission failure, we have had only 1 or 2 that failed before we planned the replacement. CAT finally started offering an exchange engine for the 777D, and 992G at such a good price, we usually dont overhaul them ourselves anymore. Same with the transmission on the 777D. I know a few contractors that have some
    D6H Dozers with 20,000+ hours on their transmissions. They run these in the oilfield building locations, covering pits and pulling trucks with the winch. I also have noticed that the smaller machines like backhoes and D3 dozers dont get the engine life the bigger stuff does.

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    I am probably going to get some grief over my comments but here goes. I have been on the dealer side of this business for over 20 years and all on the service side. It has been my experience that the guy's with the small backhoe and small dozer are typically start up companies or a guy that THINKS he wants to be in the site prep business. They do not budget for maintanance and repair or even how to take care of his equipment. One other problem is they typically do not have one operator assigned to a machine, it is who ever is available that day. But on the other side of the equation there are guy's that have a few pieces and they last them a life time but those guy's are limited and far and few between compared to the guy's that do not take care of their stuff.

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    793C 3516HD will get a solid 20'000hrs out of the engine. 24k is common.

    D11R's get a Full frame rebuild every 12'000 so cannot comment on how long they will go.

    Alco will know ..

    Seen some MTU's with alot of hour's on them as well.

    I agree that smaller Equipment tend to hour out sooner. Maybe this has something to do with starting and stopping often? A Haul truck may run for a week without being shut down, Even longer in the winter!

    Only time they shut er down is for PM work or when they run out of fuel!
    Last edited by Haul-Pak; 03-12-2009 at 01:58 PM.
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    I have about 5800 on my Lull with a JD non-turbo same on the Funk transmission. Six + on the Lull and Detroit. 35 on my Lull with a JD turbo, and 3+ on another Lull JD non-turbo and the Funk on that went at 2,000 and I was the only one to ever run it bar a few hours. They said something just fell apart and it let go. That was the machine that was babied the most by me. I am hoping I get near ten on the engines but it may be a dream especially the Detroit which I didn't get new or near new like the others.

  14. #14
    Senior Member ddigger's Avatar
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    On my 1995 CAT 330L excavator,which I purchased new, it now has just a tick over 18,000hrs. I am an absolute freak on my service, and to this day it does not use any oil between changes which are always done at 250hrs, along with all of the other filters. I am the only one who ever runs this machine. I got 16,000 hrs, out of my first under carrige. I am planning to replace it in the next yr or so depending on the economy, not because its used up by any stretch, but due to the tighter air quality laws and needing a few more tax deductions. I got the same type of service out of my first excavator as well which was a 792 JOHN DEERE.

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    I got a John Deere 4000 1967 model tractor got 1 million hrs on it and had a mojor overhual on it at every 10,000 hrs on it and still runs like brand new and I expect that thing to run for generations to come. it a 6 cyl. 100 horse. It had been under great mantince service such as oil change every month and greased and lubed every day. always storyed indoors and never had problems wit hit but last year the water pump had a crack in it and replaced it. That was the only issue i had with that tractor.
    Last edited by cowdogteamroper; 03-16-2009 at 12:02 PM. Reason: couldnt finished it boss was coming

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