Throttle at low speed?

Keef · 06-25-2008, 08:17 AM

The JD lawn tractors have a throttle that go from low to high speed. However we are told in the manual to always keep it at high. So what is the usefullness to have a throttle control when we should always keep it high? Can you have the throttle on low when not cutting the grass and just driving it from Point A to Point B to reduce the amount of gas your burning?

JESSE1 · 06-25-2008, 08:20 AM

Use full throttle only when mowing.

jgrreed · 06-25-2008, 08:58 PM

Throttle sets your power, gears or hydro setting sets your speed. If you're doing something that needs power, run the throttle near full, especially if you're machine is hydrostatic and your using the hydraulics at the same time, ie. for loader/backhoe work. If your engine is 'bogging down', rev'er higher (up to the max of course).

-J.

Keef · 06-26-2008, 07:30 AM

Ok makes sense; but how about just driving the tractor. When your are not pulling or cutting anything?

JerryG · 06-26-2008, 07:38 AM

If your just driving around, you don't have to have it at full throttle.

BlackRaptor · 06-26-2008, 08:40 AM

on the 2520 if i'm just driving around the Yard in low i'll run about 1500 RPM's if i'm in high just moving empty around the yard i run about 1800.

On the Little mowers I'll run 1/2 to 1/4 throttle when transporting it.

jdbower · 06-26-2008, 08:50 AM

Typically you want to start the blades at low RPMs as well, saves wear and tear on the belts and can save more than that if the blades are jammed.

Keef · 06-26-2008, 08:54 AM

Quote:

Originally Posted by jdbower

Typically you want to start the blades at low RPMs as well, saves wear and tear on the belts and can save more than that if the blades are jammed.

Now you are a smart lad, thanks for that info, I did not think about that.

Mighty Dodge · 06-26-2008, 10:41 AM

I run 1500 to 1800 when not doing ground engaging work. If I'm plowing or digging then I crank it up to 2000 or a little more.

M.D.

JESSE1 · 06-26-2008, 10:44 AM

Quote:

Originally Posted by jdbower

Typically you want to start the blades at low RPMs as well, saves wear and tear on the belts and can save more than that if the blades are jammed.

That sounds like the way to do it but check your operator's manual. The operator's manual for my JD 997 Diesel ZTR mower calls for engaging the pto at full throttle. I don't know why but that's what JD calls for.

06-25-2008, 08:17 AM	#1 (permalink)
Keef Member Join Date: Jun 2008 Location: Pennyslvania Posts: 29	Throttle at low speed? The JD lawn tractors have a throttle that go from low to high speed. However we are told in the manual to always keep it at high. So what is the usefullness to have a throttle control when we should always keep it high? Can you have the throttle on low when not cutting the grass and just driving it from Point A to Point B to reduce the amount of gas your burning?

06-25-2008, 08:20 AM	#2 (permalink)
JESSE1 Gold Member Join Date: Nov 2003 Location: Kilgore, Texas Posts: 398	Re: Throttle at low speed? Use full throttle only when mowing. __________________ 6400 John Deere w/ cab, JD 535 Baler, 997 ZTR Diesel, 72" 7 Iron deck, John Deere HPX 4x4 Diesel Gator

06-25-2008, 08:58 PM	#3 (permalink)
jgrreed Member Join Date: Jun 2008 Posts: 38	Re: Throttle at low speed? Throttle sets your power, gears or hydro setting sets your speed. If you're doing something that needs power, run the throttle near full, especially if you're machine is hydrostatic and your using the hydraulics at the same time, ie. for loader/backhoe work. If your engine is 'bogging down', rev'er higher (up to the max of course). -J.

06-26-2008, 07:30 AM	#4 (permalink)
Keef Member Join Date: Jun 2008 Location: Pennyslvania Posts: 29	Re: Throttle at low speed? Ok makes sense; but how about just driving the tractor. When your are not pulling or cutting anything?

06-26-2008, 07:38 AM	#5 (permalink)
JerryG Super Member Join Date: Apr 2000 Location: Northwest Arkansas Posts: 6,904	Re: Throttle at low speed? If your just driving around, you don't have to have it at full throttle. __________________ My Photos My OTHER Photos

06-26-2008, 08:40 AM	#6 (permalink)
BlackRaptor Member Join Date: May 2008 Posts: 41	Re: Throttle at low speed? on the 2520 if i'm just driving around the Yard in low i'll run about 1500 RPM's if i'm in high just moving empty around the yard i run about 1800. On the Little mowers I'll run 1/2 to 1/4 throttle when transporting it. __________________ 2008 John Deere 2520, 200CX FEL, 62inch Ramp on Deck.

06-26-2008, 08:50 AM	#7 (permalink)
jdbower Platinum Member Join Date: Jun 2006 Location: Howell, NJ, USA Posts: 566	Re: Throttle at low speed? Typically you want to start the blades at low RPMs as well, saves wear and tear on the belts and can save more than that if the blades are jammed. __________________ Thanks, Jeff JD 2520, 62D OnRamp MMM with MCS, 200CX Loader with 53" bucket and forks, RT1250 tiller, DR PTO Chipper/Shredder, iMatch/Pat's EZ Change, 46 BH, Top-N-Tilt

06-26-2008, 10:41 AM	#9 (permalink)
Mighty Dodge Silver Member Join Date: Jan 2007 Location: Parkton, MD Posts: 183	Re: Throttle at low speed? I run 1500 to 1800 when not doing ground engaging work. If I'm plowing or digging then I crank it up to 2000 or a little more. M.D. __________________ 2001 JD 4200, 420 loader, HF Quick Hitch, 72 mower, bucket boom, back blade, boom pole, forks, carry-all, moldboard plow, middle buster, receiver hitch. My Pics http://www.tractorbynet.com/photos/s...0/ppuser/33421

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