CT225 FINISH MOWER QUESTION?

[BobcatTR]

Hi guys, if I mow with my tack showing 1500 rpm, is my rear PTO turning 540?
Orrrr, do I need to run RPM's to the RED DIAMOND on the tack, for 540?
Thanks alot!
Terry

 

[nknelsen]

Hi guys, if I mow with my tack showing 1500 rpm, is my rear PTO turning 540?
Orrrr, do I need to run RPM's to the RED DIAMOND on the tack, for 540?
Thanks alot!
Terry

Red diamond I think. Most tractors have 540 written beside the indicator mark on the tach.

 

[BobcatTR]

Red diamond I think. Most tractors have 540 written beside the indicator mark on the tach.

Thanks!
I don't believe mine says it.
I will look later today.
I was thinking RED DIAMOND was MAX RPM.

 

[nknelsen]

Thanks!
I don't believe mine says it.
I will look later today.
I was thinking RED DIAMOND was MAX RPM.

I believe 540 is only achieved at or very close to max RPM. But I think operating speed is a better description then max RPM.

 

[rodneyn]

I believe 540 is only achieved at or very close to max RPM. But I think operating speed is a better description then max RPM.

Just because it states 540 on tach - dash at specific RPM does not mean you have run the implement at that speed. Close to 540 RPM is acceptable and will provide life to tractor and implement. Unless your running a disc mower less PTO RPM’s is safe bet. Just look at this way you don’t typically drive your car in low gear wide open throttle why would with your tractor.

 

[nknelsen]

Just because it states 540 on tach - dash at specific RPM does not mean you have run the implement at that speed. Close to 540 RPM is acceptable and will provide life to tractor and implement. Unless your running a disc mower less PTO RPM’s is safe bet. Just look at this way you don’t typically drive your car in low gear wide open throttle why would with your tractor.

If a car was the same as a tractor, we wouldn't need tractors. You simply can't compare the 2. Attachments built for tractors are built for an RPM of 540. And tractors are built to deliver said 540. Proper maintenance is much much more important to long life then running at the speed it was designed for.

 

[rodneyn]

If a car was the same as a tractor, we wouldn't need tractors. You simply can't compare the 2. Attachments built for tractors are built for an RPM of 540. And tractors are built to deliver said 540. Proper maintenance is much much more important to long life then running at the speed it was designed for.

Beg to differ put on thousand of hours on equipment either you run it hard ending with short life. Run it less hard and it last lifetime. 540 RPM is suggested optimal range just that. I design equipment for a living “design engineer” we provide optimal range for equipment use. Some users follow guidelines others don’t and seek warranty. Again 540 pto is line or verbiage on the dash you the operator choose or listen to where the motor is running with less vibration (frequency) yet still optimizing the implement for best performance. Yet not loading down the motor either , too low of RPM.

 

[BobcatTR]

Beg to differ put on thousand of hours on equipment either you run it hard ending with short life. Run it less hard and it last lifetime. 540 RPM is suggested optimal range just that. I design equipment for a living “design engineer” we provide optimal range for equipment use. Some users follow guidelines others don’t and seek warranty. Again 540 pto is line or verbiage on the dash you the operator choose or listen to where the motor is running with less vibration (frequency) yet still optimizing the implement for best performance. Yet not loading down the motor either , too low of RPM.

Thanks for the input!
Very interesting information!
I'd rather keep my equipment around!
Keep my blades sharp, and operate it by sound, vibration, operation, etc.
Makes sense!

 

[Midniteoyl]

Some users follow guidelines others don’t and seek warranty. Again 540 pto is line or verbiage on the dash you the operator choose or listen to where the motor is running with less vibration

Contradictory

 

[nknelsen]

Beg to differ put on thousand of hours on equipment either you run it hard ending with short life. Run it less hard and it last lifetime. 540 RPM is suggested optimal range just that. I design equipment for a living “design engineer” we provide optimal range for equipment use. Some users follow guidelines others don’t and seek warranty. Again 540 pto is line or verbiage on the dash you the operator choose or listen to where the motor is running with less vibration (frequency) yet still optimizing the implement for best performance. Yet not loading down the motor either , too low of RPM.

If you're buying a tractor that vibrates at what you say is the optimal range, then you're buying the wrong tractor. Any good operator will listen for noise and feel for vibration and won't run a tractor under those conditions. But again proper maintenance is much more important than trying to out-engineer the engineers that built the tractor.

Attachments and tractors are built to run at that speed.

As long as you've given the motor a proper warm up before running at full "optimal" speed and also given it a proper cool down before shutting it off, you will not extend the life of the motor appreciably by running it at a lower RPM.

Run it the way it was designed, if there is any noise or vibration then you need to investigate further.

And IF you have any noise or vibration please let us know here on TBN and keep us informed on how your dealer responds to help others make somewhat informed decisions on which tractor to buy.

Forums like TBN should encourage manufacturers to build a better product.

 

[tman1020]

The little diamond on the tack shows you 540 RPM. If you have a 540 RPM mower that is what it is designed to work most efficiently at for blade speed. If what you’re cutting works better for you at a lower RPM so be it. But running your implement at the recommended rpm range is not excessive wear and tear on the machine. But definitely nothing wrong with lowering your RPMs if it fits your need.

 

[rodneyn]

If you're buying a tractor that vibrates at what you say is the optimal range, then you're buying the wrong tractor. Any good operator will listen for noise and feel for vibration and won't run a tractor under those conditions. But again proper maintenance is much more important than trying to out-engineer the engineers that built the tractor.

Attachments and tractors are built to run at that speed.

As long as you've given the motor a proper warm up before running at full "optimal" speed and also given it a proper cool down before shutting it off, you will not extend the life of the motor appreciably by running it at a lower RPM.

Run it the way it was designed, if there is any noise or vibration then you need to investigate further.

And IF you have any noise or vibration please let us know here on TBN and keep us informed on how your dealer responds to help others make somewhat informed decisions on which tractor to buy.

Forums like TBN should encourage manufacturers to build a better product.

Harmonics of the motor- all crankshafts are balanced to some controlled specifications. Depending on manufacturer there is resonance frequency in the motor on the power rpm curve applied. Depending on the balance zone and specification it can be at low range and higher range. Bottom line any good experienced operator knows the right sound for his machine to operate.

Now I was not referring to a vibrating Johnny put - put but maybe you were and your probably a green machine owner. I always was fond of farmalls they did not vibrate.

Never experienced any Japan or Korean tractor vibrate with 3 or more cylinders now 2 cylinders that is different story. Early kubota with 2 cylinders would shake your inner core at lower speeds.

I assume you are at pto speed when you engage the implement also. Since you are fixated running the motor at PTO speed.

I am sure many TBNers will join in how to engage pto correctly. Let them share in fun here with us.

We all have something to learn otherwise we will never achieve wisdom. Best of luck in your journey while running your tractor.

 

[ROUSTABOUT]

We never run anything at 540. We cut hay with a disc mower too I don't run anything wide open. Just enough that it does the job. You can always slow down travel speed to match ability of implement.

 

[Bobcat Tractor Mac]

I hope this helps.

 

[Bobcat Tractor Mac]

We never run anything at 540. We cut hay with a disc mower too I don't run anything wide open. Just enough that it does the job. You can always slow down travel speed to match ability of implement.

If you trade up to a above tier 4 tractor you will need to change. They are meant to run at full speed to keep the exhaust hot and help burn off the particulate in the DPF filter. If you run at a slower speed you will be going into regeneration more often and stopping to do a parked regeneration more often as well. If you have a Hydrostatic drive tractor it works better at full speed also.

 

[ROUSTABOUT]

If you trade up to a above tier 4 tractor you will need to change. They are meant to run at full speed to keep the exhaust hot and help burn off the particulate in the DPF filter. If you run at a slower speed you will be going into regeneration more often and stopping to do a parked regeneration more often as well. If you have a Hydrostatic drive tractor it works better at full speed also.

Thats good, but I'll never have to deal with it.