PTO HP

Charliew · May 13, 2004

Can anyone tell me what the H.P. is at the PTO of a Agracat 3720. This is supose to be a 35 hp tractor. None of the books I have tell about the PTO H.P.

mscott · May 13, 2004

I've been told the Chinese rate their tractors hp by the pto?

exportcn · May 13, 2004

If a 30 hp tractor. I 've been told the PTO H.P is 19.8kw(27HP).

SPIKER · May 14, 2004

Pretty much every engine manufacture rates the engine at the flywheel. so assuming a 3~5% friction loss then it should be about 32 hp pto. just an ASSUMECTION no dats from that perticular unit.

Mark M /forums/images/graemlins/cool.gif

Chipperman · May 15, 2004

Charliew
There are many ways of stating HP. The most common are Gross engine, Net engine and PTO. For comparison PTO is best. Many of the smaller tractors are rated in Gross HP.
Happy Tractoring
Chipperman /forums/images/graemlins/smile.gif /forums/images/graemlins/smile.gif

johnk · May 17, 2004

I have a 22 hp Jinma and my friend up the road has a Kioti 20 HP shuttle shift 3 cylinder. I run my tractor @ around 1200 to 1300 rpm's all the time to do all my work. My friend seen my 2 Cylinder tractor with 5 foot bucket scoop up a bucket full of mud @ 1200 RPM's and it didn't bog a bit. He said his would have stalled out without a doubt. You look at a Crafstman 22 HP garden tractor and say HUH??? How can you have two 22 HP tractors that are so far apart in the apparant power even though rated at the same HP? I know gearing has a lot to do with everything but it just doesn't seem possible to have such a different range of actually feeling the difference of supposedly the same Hrse Powers. What are your opinions??

bluechip · May 17, 2004

Horsepower is a measure of work over time. Torque and rpm enter into the equation, which someone smarter than me can post. But in general the engine that makes it power at lower RPM will have more torque, which is the energy that does work. Higher RPM engines can make more HP with less torque (for example, a gas lawn tractor engine)

Soundguy · May 18, 2004

Also.. that 22 hp craftsman lawnmower.. might have been rated at 22 hp.. with no driveline or attatchments.. that is.. just the engine setting on a bench.. at max ungoverned rpm.. and it produced 22 hp.. right before the engine detonated..

Soundguy

scrinch · May 18, 2004

22 hp is 22 hp. The Craftsman and the Jinma should be able to do the same work when they are putting out 22 hp if they are honestly rated and geared appropriately. But the Sears has a gas engine that probably isn't rated to operate at 22 hp for any significant length of time, while the diesel engine probably is. My guess is that you probably operate the Sears unit at 12-14 hp continuously and the Jinma at 18-20 hp, and that's why they feel so different, powerwise. Of course the weight difference and rpm difference give them a very different sound and feel, too.

johnk · May 18, 2004

Thats my point. A craftsman tractor probably weighs 350 to 400 pounds and my Jinma weighs over 3000 w/ loader. Most HP should be used to just get the mass of the tractor moving and the mower spinning for example if using one. With both tractor moving and brush hog going there is no apparant power lag on the Jinma. It would be an effort just to put the brush hog in a little trailer and tow it with the craftsman of comparable Horse Power. Thats what stifles me of these HP ratings................

JOhn