So does a mechanical hour meter that shows RPM hours more accurately indicate engine and transmission wear based on hours? When the engine is run at part throttle putzing around the yard the hours stack up slower but there is less engine wear at a light load.
An electric tac counts hours no matter how fast or slow the engine runs. My 1086 is bumping 18,000 hours on an electric tac. Seems like a lot of hours but probably only half of those hours are hard working in the field hours. The other half was spent pulling wagons, hauling manure and loader work, all jobs that dont cause a lot of wear. But when guys see the 18,000 hours their jaws drop.
A neighbor of mine rented out his tractor a wheat harvesting crew for their grain cart. It had an electric tac. All summer long that tractor ran all day whether it was needed or not because the cart operator liked to climb into a cool air conditioned cab after she was away from the tractor for awhile. I cant really blame the cart operator because a closed cab in 100 degree plus temps can get mighty hot in a short amount of time if the engine is shut off but those hours were racking up.
The rental rate on the tractor was based on tac hours and at the end of the summer the tac showed an enormous amount of hours because of the idle time. There was hard feelings between the owner and renter when it came time to pay the rental bill. If that tractor would have had a mechanical tac the final hours at the end of the summer would have been much lower.
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Today's Featured Article - Fordson Model N: Field Service Operations and Lubrication - by Anthony West. The daily or weekly servicing of any vehicle is of the utmost importance, and in days gone by when our favorite tractors were doing an important and Commercially vital job on the farm, these service operations would make a major difference to the running costs and economy of the farm. This being so, it surprises me to see how many enthusiasts attending rallies, shows etc, seem to be unaware of the importance of this constant attention. Possibly the modern machine with its 6,000 mile or even once
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