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Tractor Talk Discussion Forum

Hours verses milage

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RW

12-23-2004 16:46:56




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Has anyone come up with a relationship to hours and miles. Of couse this is very subjective but just wanted to know. Any ideas?




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jdemaris

12-25-2004 14:30:24




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 Re: Hours verses milage in reply to RW, 12-23-2004 16:46:56  
It seems in many ways it is comparing "apples to oranges" since a working tractor (as compared to a collector's tractor) tends to get worked a lot harder than an automotive engine. But, as a predictor of engine life, a modern automobile should easily last 150,000 miles before a rebuild if well taken care of, whereas a tractor engine should last 10,000 hours between rebuilds. That comes to 15 miles per engine hour. Of course, there are exceptions - I have a Chevy diesel Suburban with 400,000 plus miles and never been rebuilt. There are probably some exceptional tractors out there also.

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Cliff Neubauer

12-24-2004 15:04:01




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 Re: Hours verses milage in reply to RW, 12-23-2004 16:46:56  
Cummin's uses 50mph as a general rule of thumb but they have more to the equation depending on the applications.



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tony weir

12-24-2004 14:56:00




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 Re: Hours verses milage in reply to RW, 12-23-2004 16:46:56  
I use 1hr =30 miles under LIGHT LOAD IE long run or short cycle use on forklifts and 1hr=40 miles under hard loads ie unloading trucks or in paper mills remembering that oil and filters are cheap engines and tranys are not



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Iowa

12-24-2004 09:32:08




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 Re: Hours verses milage in reply to RW, 12-23-2004 16:46:56  
I would say the average MPH of a working tractor over the year is about 8-9 miles per hour. A tractor with 4000 hours on the meter may have about 32-36 thousand hard working miles on it. One day in the field of 10 hours at 7 miles per hour puts on 70 miles. Our feedlot tractor just grinds feed and loads siliage, so it's miles are a lot less, but it still has the hours. I dont know what the 45 MPH has to do with tractor hours.

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James2

12-24-2004 08:53:46




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 Re: Hours verses milage in reply to RW, 12-23-2004 16:46:56  
The posts below verify the industries assumption on this relationship, which is nominally 40 mph. Isn't that nice when engineers come up with the same conclusion which happens in real life ?



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Bill(Wis)

12-24-2004 05:44:52




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 Re: Hours verses milage in reply to RW, 12-23-2004 16:46:56  
I have a Garmin GPS receiver on the dashboard of my truck. On the screen that displays all the #s (lats, longs,etc) it will display average speed in knots, statute miles or km (whatever you want). You just have to remember to turn it on each time you go somewhere. It keeps track of average speed over thousands of whatever units.



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MarkB_MI

12-24-2004 03:30:57




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 Re: Hours verses milage in reply to RW, 12-23-2004 16:46:56  
I get about 45 miles per engine hour in mixed city/highway driving. This is in Michigan where nobody observes the posted speed limit and freeway traffic runs about 85 mph. If you live in state populated by normal people I think about 40 mph would be a typical average.



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Dean Barker

12-23-2004 22:01:11




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 Re: Hours verses milage in reply to RW, 12-23-2004 16:46:56  
A friend had a 1955 Chevrolet sedan that he put an hour meter on; he averaged 35 mph over 100,000 miles. Another friend bought a new Chev pickup last year; he has averaged a little over 40 mph for 26,000 miles. I always thought it would be much higher than that.



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Mike w J

12-23-2004 20:35:06




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 Re: Hours verses milage in reply to RW, 12-23-2004 16:46:56  
most of our tractors with the old style RPM gauges compute hours at pto speed run it slower it puts on less hours and faster puts on more 1900 rpm 60 MPH is about what a car would run at that speed so that is what we use. a tractor at idle runs a lot longer tha an hour to put on an hour the new electric clocks put on hours when the key is on running or not A john deere dealer told me to figure that the newer tractors will record 40% more hours then the old cable driven hour meters

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Jonboy

12-23-2004 20:01:18




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 Re: Hours verses milage in reply to RW, 12-23-2004 16:46:56  
third party image

I would multiplied each hour by 25. I figure an excellent life span of a car to be 250,000 miles, and I think an excellent life span of a tractor engine to be 10,000hrs, so therefore a tractor that has 10,000hrs has 250,000 miles. I wouldn't try to go by that too much as most engines don't reach 10,000hrs before they need a rebuild and there are many reasons why, it could be poor design, some engines tried to make too much power for their size like the 7080 (180hp)Allis engine was known to have a much shorter life span of like 4,000hrs before heat related problems caused premature failures (more fuel = more heat), but the same engine was used in different models such as the 7060 (160hp) and 7040 (140hp) with reduced power levels and was much longer lived, in fact, I work for a guy who has a 7040 with over 8,000hrs on it, and it still runs like a brand new one. One quality about tractors is that they are capable of being rebuilt again and again. Maintenence and many factors decide upon how long an engine will last and trying to compair hours to miles really doesn't work too well.
hope this helps

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buickanddeere

12-23-2004 19:37:51




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 Re: Hours verses milage in reply to RW, 12-23-2004 16:46:56  
From the truck dash. 1150hrs, 42,000miles,35 mph average & 12.5 mpg.



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buickanddeere

12-23-2004 19:36:02




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 Re: Hours verses milage in reply to RW, 12-23-2004 16:46:56  
From off the truck dash. 1150 hrs, 42,000miles, average speed 35mph and average mileage 12.5 .



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Ken S.

12-23-2004 19:15:31




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 Re: Hours verses milage in reply to RW, 12-23-2004 16:46:56  
My dad used to say that 2500 hours is a 100,000 miles.



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CLW

12-23-2004 18:35:37




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 Re: Hours verses milage in reply to RW, 12-23-2004 16:46:56  
RW, I worked for a telephone company and set poles for about 12 years. Or truck had an hour meter and since about 6 of every 8 hours the engine ran the truck was setting in one spot. They (truck builder) said figure each hour as 45 miles to figure engine mileage. I don't know how that would work on a tractor. If you use a 2-cyl. Deere with 2000 hrs that would equal about 100,000 miles.
CLW



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Chances R

12-23-2004 18:34:08




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 Re: Hours verses milage in reply to RW, 12-23-2004 16:46:56  
I use 50 mph



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Davis In SC

12-23-2004 17:01:24




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 Re: Hours verses milage in reply to RW, 12-23-2004 16:46:56  
30 miles = 1 hour (my opinion)That is about the average speed a car or truck goes, so 1 hour equals 30 mile should be a good ballpark figure to use. A tractor with 3,000 hours would be like a truck with 90,000 miles.



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txblu

12-23-2004 17:19:06




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 Re: Hours verses milage in reply to Davis In SC, 12-23-2004 17:01:24  
I have tried to use that rationale also in comparing hours to anticipated wear and tear. Problem is, tractors are built so rugged they may far exceed my expectations, if they received reasonable care.

Another thing is years of age vs usage. Road vehicles usually get used. Tractors are like boats; they may spend a lot of their year in the barn.

Mark



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edchainsaw

12-23-2004 17:00:21




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 Re: Hours verses milage in reply to RW, 12-23-2004 16:46:56  
that is a very subjective thought... but if you use 5mph you could be close for a working tractor. so go with what you want.



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