Hello All,
New to the site here and have a question. What is the PTO speed at engine idle on an L2501?
New to the site here and have a question. What is the PTO speed at engine idle on an L2501?
L2501 PTO speed at engine idle
- Thread starter giantoutdoors
- Start date
North Idaho Wolfman
Moderator
Staff member
Lifetime Member
Equipment
L3450DT-GST, Woods FEL, B7100 HSD, FEL, 60" SB, 743 Bobcat with V2203, and more
The answer is a worthless number?
You don't run PTO powered implements at an idle.
So what are you trying to accomplish?
You don't run PTO powered implements at an idle.
So what are you trying to accomplish?
NCL4701
Well-known member
Equipment
L4701, T2290, WC68, grapple, BB1572, Farmi W50R, Howes 500, 16kW IMD gen, WG24
No clue because I don’t have a L2501 and have never even thought of wanting to know PTO speed at idle on any tractor, however:
PTO speed is linearly correlated to engine speed. There should be a mark on the tach for 540 PTO RPM. So if you take the tach RPM for 540 PTO and divide by 540 that gives you the engine speed to PTO speed ratio. Then take the engine RPM at idle, divide by the ratio you just came up with and that gives you PTO speed at idle.
For my L4701, engine speed is 2650 at 540 so that’s a 4.9074/1 ratio. I really don’t know what idle speed is as I’ve never paid it a ton of attention but swagging 750 engine RPM at idle divided by 4.9074 is about 153 RPM at idle. That’s probably not far off. If it was any slower it could probably be measured with a stop watch and counting how many times it goes around.
PTO speed is linearly correlated to engine speed. There should be a mark on the tach for 540 PTO RPM. So if you take the tach RPM for 540 PTO and divide by 540 that gives you the engine speed to PTO speed ratio. Then take the engine RPM at idle, divide by the ratio you just came up with and that gives you PTO speed at idle.
For my L4701, engine speed is 2650 at 540 so that’s a 4.9074/1 ratio. I really don’t know what idle speed is as I’ve never paid it a ton of attention but swagging 750 engine RPM at idle divided by 4.9074 is about 153 RPM at idle. That’s probably not far off. If it was any slower it could probably be measured with a stop watch and counting how many times it goes around.
Not necessarily a worthless number. I know a handful of tractor owners that run augers at idle speed, sprayer pumps at idle speed, buzz saws at idle speed. I can elaborate on the specifics if you'd like, but don't think it's necessary.
North Idaho Wolfman
Moderator
Staff member
Lifetime Member
Equipment
L3450DT-GST, Woods FEL, B7100 HSD, FEL, 60" SB, 743 Bobcat with V2203, and more
Auger, I get idle, but why do you need to know RPMS?
Sprayer pumps? How the heck you going to use that, unless all the work is standing still, any movement is going to change RPMS.
Buzz saw? Only grandpa stumpy is using one of those.
I get your point.
NCL4701 already gave an answer that works.
FWIW the PTO speed on my L2501 is supposed to be 540 at about 2000 rpm. Since my tractor idles at about 1000 rpm I'd guess the PTO speed is about half of 540 or somewhere around 270 rpm. This is way outside the optimum power range of the tractor, though.