hours

[N80]

Considering the way I use my tractor, measuring the hours based on PTO speed on the tach (2200 rpm) will not tell the prospective buyer much about how my tractor is used. I rarely spend much clock time at 2200 rpm. Most of my use is back-and-forth type stuff. Even mowing I barely get to 2200 rpm. But, that doesn't mean the engine isn't under load. At times it is under extreme loads, repetatively, without ever breaking 2200 rpm. I have no idea what tach speed my hour meter is calibrated to. I have no idea what this means in terms of my maintanence schedule...maybe I should do things a little earlier than the manual calls for. Of course, I'm assuming Kubota takes all of this into account.

 

[Soundguy]

Having a set tach/hour calibration is still plenty usefull even if you are not doing pto work.

If I am buying a loader tractor, that the owner said only mowed 5% of it's life, and the other 95% was drawbar or loader time.. then i can look at that tach hour time and then inflate it to get an idea of usage. Since the meter will be ratio locked with the tach, lets say your pto rpm on the enging is 2200, and you do 95% of your loader work closer to 1800 rpm. That means for every clock hour you work, you have really worked 71 minutes, not 60 minutes.

if i see 600 clock hours on your tach, I just apply that ratio. That's more like 708 hours.

( by the way.. if you are doing "extreme" heavy load mowing ( your own words ).. IMHO.. you should be at pto speed.. that's most likely where your engines sweet power spot is closest to.

Soundguy

 

[Marcussen]

My Kubota L2800 hour meter is based on RPM . I figured that out after checking my watch versus the hour meter. The almost never matches . Using the one billon rotations for life expectancy I can excpect the the engine to last 6944 hours. (2400 RPM = one hour) With my normal use it will should last me 46 years (150 hours a year). I will do my part with regular maintenance .

 

[Turbys_1700]

On my NH 1720 the hours are calculated at 1833 RPM's. My Yanmar was calculated at 2500 RPM's. I guess that I would never wear out either machine in my lifetime. Most of my use is with a RFM so the engine is not in a very hard strain. I would not worry about hours that much. I would be more concerned about maint. An engine with 2000 well maintained hours may be better than a poorly maintained one at 500 hours.

 

[Dusty]

To me, it isn't hours worked, but maintenance that is the important question. Low hours with no oil changes are not good.
Dusty

 

[N80]

Having a set tach/hour calibration is still plenty usefull even if you are not doing pto work.

If I am buying a loader tractor, that the owner said only mowed 5% of it's life, and the other 95% was drawbar or loader time.. then i can look at that tach hour time and then inflate it to get an idea of usage. Since the meter will be ratio locked with the tach, lets say your pto rpm on the enging is 2200, and you do 95% of your loader work closer to 1800 rpm. That means for every clock hour you work, you have really worked 71 minutes, not 60 minutes.

if i see 600 clock hours on your tach, I just apply that ratio. That's more like 708 hours.

Makes sense.

( by the way.. if you are doing "extreme" heavy load mowing ( your own words ).. IMHO.. you should be at pto speed.. that's most likely where your engines sweet power spot is closest to.

Soundguy

You read it right, but I said it wrong. I didn't intend it to say that the mowing was extreme, but it looks that way. What I was trying to say was that my mowing is often at less than PTO speeds, but at other times the engine is under extreme loads doing other stuff besides mowing (pushing trees over, digging stumps, etc.). With these activities I'm going slow, usually in 2 low and the RPMs sometimes get up to 2200 but rarely stay there. In any case, I agree, if the mowing is heavy my tractor (probably all tractors) works best at PTO speed.

 

[john_bud]

My Kubota L2800 hour meter is based on RPM . I figured that out after checking my watch versus the hour meter. The almost never matches . Using the one billon rotations for life expectancy I can excpect the the engine to last 6944 hours. (2400 RPM = one hour) With my normal use it will should last me 46 years (150 hours a year). I will do my part with regular maintenance .

Your last line says it all, "I will do my part with regular maintenance".

jb

 

[Soundguy]

You read it right, but I said it wrong. I didn't intend it to say that the mowing was extreme, but it looks that way. What I was trying to say was that my mowing is often at less than PTO speeds, but at other times the engine is under extreme loads doing other stuff besides mowing (pushing trees over, digging stumps, etc.). With these activities I'm going slow, usually in 2 low and the RPMs sometimes get up to 2200 but rarely stay there. In any case, I agree, if the mowing is heavy my tractor (probably all tractors) works best at PTO speed.

Ahh.. got it. That makes sense.

thanks

Soundguy

 

[NewToy]

My Kubota L2800 hour meter is based on RPM . I figured that out after checking my watch versus the hour meter. The almost never matches . Using the one billon rotations for life expectancy I can excpect the the engine to last 6944 hours. (2400 RPM = one hour) With my normal use it will should last me 46 years (150 hours a year). I will do my part with regular maintenance .

Is your hourmeter an analog or a digital type? Was trying to determine if the folks with the digital variety have the PTO rpm's factored in.
John

 

[whitetiger]

Is your hourmeter an analog or a digital type? Was trying to determine if the folks with the digital variety have the PTO rpm's factored in.
John

With an electronic hour meter every sixty minutes = 1 hour no matter what RPM the engine is running.