Question On PTO Speeds...

[JDGreenGrass]

I'll be running a 3pt. snowblower this winter. It's my first pto attachment.

Do I need to always run the blower at 540rpms. My tractor is rated at like 2700rpms to reach 540.

If we get a 6" storm can I run the blower at, say....2000rpm's.?? Or, is this not good for the equipment.??

 

[whistlepig]

You are going to get two schools of thought here. Some run just enough PTO RPM to handle the load. Some always run at the recommended PTO speed. I always run PTO equipment at the recommended RPM for the tractor and implement. Running less than the recommended recommended PTO speed will, in some cases, save fuel. And less RPM's on my tractor runs up less hours on the hour meter. An hour at PTO speed is an hour on my tractor hour meter. An hour at 1/2 PTO speed is 1/2 hour on my hour meter. I can't say one way is better way than the other. Just my personal preference.

 

[tessiers]

implements are designed to run at 540 pto speed, some implements will operate at slower speeds, some will not. With the blower it will not hurt anything, except the snow will not blow as far and if wet may plug up in the shoot. As far as the tractor it will not hurt anything either way. I have heard of people with 1000 RPM PTO running at less RPM to achieve 540 PTO speed with less fuel consumption, this usually requires PTO shaft adapters of some sort.

 

[whistlepig]

The only thing that I won't do is "lug" the tractor motor. I would run enough RPM's on the implement to prevent it from "lugging" the tractor motor.

 

[Shmudda]

And less RPM's on my tractor runs up less hours on the hour meter. An hour at PTO speed is an hour on my tractor hour meter. An hour at 1/2 PTO speed is 1/2 hour on my hour meter.

I always thought an hour of running is an hour on the meter no matter if you were idling or running balls out???

How is the hour meter wired and configured to base its time on the speed of the engine or PTO?

Please explain this one to me........

Craig

 

[flyingcow]

implements are designed to run at 540 pto speed, some implements will operate at slower speeds, some will not. With the blower it will not hurt anything, except the snow will not blow as far and if wet may plug up in the shoot. As far as the tractor it will not hurt anything either way. I have heard of people with 1000 RPM PTO running at less RPM to achieve 540 PTO speed with less fuel consumption, this usually requires PTO shaft adapters of some sort.

plus 1 . use common sense.

 

[smstonypoint]

I always thought an hour of running is an hour on the meter no matter if you were idling or running balls out???

How is the hour meter wired and configured to base its time on the speed of the engine or PTO?

Please explain this one to me........

Craig

Craig,

This issue has come up before.

http://www.tractorbynet.com/forums/kubota-owning-operating/32564-how-does-b7800-hour-meter.html

Steve

 

[F1520]

I always thought an hour of running is an hour on the meter no matter if you were idling or running balls out???

How is the hour meter wired and configured to base its time on the speed of the engine or PTO?

Please explain this one to me........

Craig

I can't tell you how it's wired but I can tell you that the manual for my Ford 1520 says something similar: engine running time at rpms below 1,850 accumulates hour meter hours slower than clock time, running time at rpms above 1,850 accumulates hour meter hours faster than clock time.

The 540 PTO rpm marked on my tach is 2,300 engine rpms.

 

[whistlepig]

I always thought an hour of running is an hour on the meter no matter if you were idling or running balls out???

How is the hour meter wired and configured to base its time on the speed of the engine or PTO?

Please explain this one to me........

Craig

I"ll have to read my owners manual. I have no documentation to prove this it at this time. It's just what I have observed while running my tractor. Sometimes I use the tractor and loader all day just above idle speed. Maybe my hour meter isn't working correctly.

 

[whistlepig]

Craig,

This issue has come up before.

http://www.tractorbynet.com/forums/kubota-owning-operating/32564-how-does-b7800-hour-meter.html

Steve

Thanks. I didn't want to dig out my owners manual. Something I took for granted until someone questioned me. The hour meter does what it does. I have a B7800.

 

[firefighter jim]

On the Kubota's that we've owned (5), the hour meter goes off of the PTO speed. In other words, If 540 PTO speed is obtained at 2600 engine rpm and your engine is running 1300 rpm's, the hour meter will show .5 hours for every hour run. If your engine is running at 2600 rpm's, the hour meter will show 1.0 hours for every hour run.

 

[Iplayfarmer]

I think different tractors are wired differently. I know there are some out there that run the hour meter faster depending on engine speed. Mine runs by the clock. I once left the key on by accident while the tractor sat for most of a month. My hour meter ran over 400 hours before I caught it.

 

[J_J]

I believe the hour meters are designed to run at an avg of 12v, So therefore, an hour is an hour. If the hour meter is getting more voltage say at 13.2 v, then it might display more time than real time. Unless there is a voltage control regulator in the meter circuit.

If someone wants to try it, connect a 12v hour meter to a 6v battery and see if it reads 30 min in an hour of real time. It might not run at all.