3-Point Hitch PTO RPM question

[ismilelots]

1st .... thanks to everyone here for all the help you've been.
2nd ..... Warning ... this is probably going to sound like a dumb question.

I have a LS XR3135HC. On my last tractor (to remain nameless) when I switched on the PTO, the dash changed from engine RPM to PTO rpm. My LS does not seem to do that. I have implements that say I'm supposed to run them at 540rpm (PTO). Is there a way I can tell what my PTO RPM is? Like a chart converting the engine RPM to the PTO speed?

 

[jeff9366]

Have you read your LS OPERATOR'S MANUAL?

 

[ismilelots]

Never mind. I found the chart near the very end of the manual that converts the engine speed to PTO speed. 2509 engine RPM = 540 PTO RPM
For those looking (like me) it's the part that talks about the shaft dimensions and such. Never thought to look there for operation info.

++++The only thing I noticed in the manual is that the pto is rated for 540rpm. Does that mean it always runs at 540 regardless of engine rpm?

 

[3Ts]

The tractors I've operated have a mark on the tachometer that indicates the 540 rpm point. Your operator's manual will tell you at what engine rpm that will be. Also, most implements can be run at lower rpms. For example, I have a concrete mixer that I run at engine idle speed, but the mower I run at full rpms.

 

[jeff9366]

No.

The manual will inform you of what tach rpm = 540 PTO rpm, which will also be peak torque for your engine.
This is very basic information. It is there.

 

[RalphVa]

On my JD 2025R, I really do not need the hp it has available except for dirt digging. For shredding/chipping and bush hog work, I run it at 2500 rpm vs. "PTO" speed of 3000. Works fine.

Ralph

 

[deserteagle71]

1st .... thanks to everyone here for all the help you've been.
2nd ..... Warning ... this is probably going to sound like a dumb question.

I have a LS XR3135HC. On my last tractor (to remain nameless) when I switched on the PTO, the dash changed from engine RPM to PTO rpm. My LS does not seem to do that. I have implements that say I'm supposed to run them at 540rpm (PTO). Is there a way I can tell what my PTO RPM is? Like a chart converting the engine RPM to the PTO speed?

My Kubota didn't tell me either...but after reading the owner's manual I found the procedure to change the dash to read PTO rpm.

 

[Underdog57]

I have an older LS and it's on the tach.

 

[ismilelots]

No.

The manual will inform you of what tach rpm = 540 PTO rpm, which will also be peak torque for your engine.
This is very basic information. It is there.

Very sorry to not be as wise as you Jeff. I'm sure us "less-thans" can be very annoying at times. I can only hope when I get to be your age I will be almost as intelligent.
PS: If you read my edited comment, you'll see that I found this "basic" information. Thank you for your guidance.

 

[LouNY]

No.

The manual will inform you of what tach rpm = 540 PTO rpm, which will also be peak torque for your engine.
This is very basic information. It is there.

Usually peak HP almost never peak pound feet of torque.
Torque peak is usually several hundred rpm under HP peak.