How does a B7800 hour meter work?

[Muleskinner]

Does the hour meter start when the engine is running or does the tractor need to be driven to make it register? I did a job that took me four hours today, but the hour meter only registered three hours.

 

[OhioTC18]

On most CUT's the hour meter reads hour for hour at PTO speed. In other words.......whatever RPM you need to get 540 RPM PTO.
I think /forums/images/graemlins/confused.gif

 

[art]

I think that might be an electric one but not sure. That will add an hour per hour that the key is on.

 

[ronjhall]

Muleskinner
Unless <font color="orange"> Kubota </font> changed how the B7800 works from the B2910. The hour meter keeps time by the hours run at PTO speed. If you ran your engine at less than 2600 RPM’s then the full 4 hours will not show on the hour meter.

 

[Muleskinner]

How are we supposed to keep an accurate count of the actual hours on the tractor if the hour meter only works at full throttle??????????????? I usually run mine around 2000 RPM for most grading work. /forums/images/graemlins/confused.gif /forums/images/graemlins/mad.gif

 

[DK35vince]

The majority of tractors have been using this type hour meter for years.
My new Kioti uses this type hour meter as does my 26 year old John Deere.

 

[ronjhall]

<font color="blue"> How are we supposed to keep an accurate count of the actual hours on the tractor if the hour meter only works at full throttle??????????????? </font>

That’s the same way the Hour Meter worked on my 1958 Farmal 340..

 

[JMZ]

</font><font color="blue" class="small">( How are we supposed to keep an accurate count of the actual hours on the tractor...)</font>

I think of it as kinda like an engine odometer. That is, rather than just total running hours, it more closely approximates the total number of revolutions or the total distance the pistons have traveled. In that respect, IMHO, I think it's better this way since it's used to dictate when to change the engine oil.

JMZ

 

[8561]

I've wondered how the hourmeter worked since I bought the tractor. Let me make sure I understand, if my PTO speed is 2600 rpm, then if I run the tractor at 1300 rpm, it takes 2 hours running time to record 1 hour on the meter?

 

[Henro]

<font color="blue"> I think of it as kinda like an engine odometer. </font>

JMZ...I think you are right on there!

<font color="blue"> Let me make sure I understand, if my PTO speed is 2600 rpm, then if I run the tractor at 1300 rpm, it takes 2 hours running time to record 1 hour on the meter?
</font>

8561,

That is exactly the way my B2910 works... /forums/images/graemlins/smile.gif

 

[40Kchicks]

I was wondering why my seat would register 12 hours when my hour meter would only register 7. I knew I was working harder than it was reading.
Eric

 

[Muleskinner]

Okay. Let's change this post to, "The innacurate hour meter that ALL of the tractor manufactures use." How in the hell are we as consumers and owners supposed to accurately measure how many hours our tractors have operated so we can do the required maintenance???????????

The hour meter should start counting the minutes and hours the engine has run when the engine starts running!!!!!!!! How else besides keeping an independant log of the hours used can we know when it's time to do a recomended maintenace operation?????????????? /forums/images/graemlins/confused.gif /forums/images/graemlins/confused.gif /forums/images/graemlins/confused.gif /forums/images/graemlins/confused.gif

 

[ronjhall]

Muleskinner

Since you don't want to accept the hour meter that runs off the RPMs that your tractor runs at PTO speed, is a good way to keep tract of hours used. I would suggest you purchase and install one of these hour meters. Click Here

That way you can have it both ways. /forums/images/graemlins/crazy.gif /forums/images/graemlins/tongue.gif /forums/images/graemlins/grin.gif

 

[Henro]

Muleskinner,

I can see now that your affliction is that your are severely prejudiced in favor of linear time... /forums/images/graemlins/grin.gif

If the manufacturer of the tractor gives maintenance guidelines in terms of the hour meter on the tractor, they that is the measure you should use. Granted, that hour meter is pretty severe if you use it to time your personal breaks though! /forums/images/graemlins/laugh.gif

 

[RobertN]

The meter has been accurate for maintenance since they started putting them on tractors decades ago.

If you put the engine to heavy service, it needs service sooner. If you put it to light service, it is not as stressed, and will not need service as soon. What they are saying is that 2 hours of light duty work has the same affect on the pistons, rings, bearing, oil ect as 1 hour of hard work.

As a comparison, my truck manual specs out changing the oil at 7500 miles if use is light. For medium work, they recommend 5000 miles between changes. For heavy work use(towing, heavy hauling), the recomend even sooner. So, effectively, 7500 miles empty is roughly the equivilant of 3500 miles of hard work. Just a different method of measuring.

 

[Rick Jay]

Muleskinner,

</font><font color="blue" class="small">( ...can we know when it's time to do a recomended maintenace operation?????????????? )</font>

Just assume the maintenance intervals are specifying "PTO hours", to coin a phrase. Then all is well and those with "real time" hourmeters are actually performing their maintenance before they need to. /forums/images/graemlins/smile.gif

In all seriousness, I don't think the descrepancy between the two is that major, unless you idle your tractor for long extended periods, and that's bad on a diesel anyway. What is important is that the maintenance is done in a timely fashion and the hours specified are guidelines as to when things should be done.

~Rick