540/100 rpm

kevthegaff

what do u use the 1000 rpm for. i use the 540 practically for everything on my tractor

td5man

kevthegaff wrote: »

what do u use the 1000 rpm for. i use the 540 practically for everything on my tractor

We use the 1000 shaft on the silage harvester and the 10' mower is a lot easier driven at 1000 rpm it has 540 & 1000 input shaft. we also use 1000 rpm for the pto washer.

jimmy G M

Handy to use the 1000 pto on some low hp requirement jobs to save fuel- eg topping. Lets say your tractor achieves 540 rpm @ 2000 engine rpm. Switch to 1000 pto and you will achieve 540 pto rpm at say 1400 engine rpm. Many tractors have a 540E symbol on the rev counter to indicate the correct engine rpm. However need to engage the pto slowly or stall the engine

Less engine revs means less fuel used.:D

pakalasa

I only use the 1000 rpm on the fertiliser wagtail spreader.
You will tend to generate a higher torque, or twisting force too at the lower 540rpm.

As for keeping revs down to save fuel - that's not exaclty true. Here's a graph from a JD diesel engine (industrial). If revs are too low, then you can waste fuel too.

Timmaay

Hmmm ok if I remember from my engineering undergraduate correctly, then no, low revs would 99% of the time mean lower fuel consumption, unless your at the point of stalling. The graph there that you are looking at shows fuel consumption per unit power consumption (often called brake specific fuel consumption, or BSFC) , not the actual fuel consumption. It is more used for when you want to spec up the size of the engine for its specific application, so if you were spec'ing up a tractor specifically to run a topper all the time, you would be better off getting a smaller engined tractor, in which you would be operating bang in the middle of that curve of lowest BSFC, however of course no farmer is going to do this unless they have a 2nd tractor that can operate heavier stuff like agitators etc.

I suppose ultimately what I'm saying is if you have two tractors, one big and one small, and want to do something with a low HP demand like spread fertilizer, then you are usually better off going with the small tractor, and stick with the 540 rpm, as you'll be closer to the bottom of its BSFC curve, but if you only have a big tractor then the 1000rpm could well make sense.

porter shark

you boys need to be careful of economising too much on fuel. a tractor that is constantly used in economy mode like that will not last, engine will give trouble. you asking too much from low revvs

pakalasa

I think in recent years, a lot of farmers bought big tractors solely to lift those heavy silage bales. For other tasks than around the farm, the tractor is running at way below it's full HP and wasting a serious amount of fuel as a result. You can keep the revs down, but it still wastes fuel compared to a lower Hp tractor running at higher revs.

Portershark is right about running the revs too low. You will do more harm on the gearbox etc as the torque is driven up.

td5man

pakalasa wrote: »

I think in recent years, a lot of farmers bought big tractors solely to lift those heavy silage bales. For other tasks than around the farm, the tractor is running at way below it's full HP and wasting a serious amount of fuel as a result. You can keep the revs down, but it still wastes fuel compared to a lower Hp tractor running at higher revs.

Portershark is right about running the revs too low. You will do more harm on the gearbox etc as the torque is driven up.

Tractors are too big for what they are doing imo.
We have 370 hp on the farm where a 50 hp tractor used to do everything.

just do it

I've an old 165 that has served me well but just this year the bales are that little bit too heavy for it. I'll have to muddle on for this winter but have to budget on getting a replacement next year. So that means a bigger tractor :rolleyes:

F.D

I know if i try spin up the topper in 1000RPM all you hear is a grinding like slipping in the pto on the tractor, so not every thing will run in 1000RPM
Running the Wagtail and fert spreaders would be a good idea though