Forum Thread

Can I make my John Deere faster?

dealgate 6,368 1,085 May 3, 2011 at 04:11 AM
I have a 2009 JD X304 that I'd like to go faster. It seems to be governed since the speed tops out long before the engine RPMs do. Is there some sort of governor that can be defeated?

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#2
What do you mean by "the speed tops out long before the RPM"? Speed is directly proportional to engine RPM

Tractors and lawn mowers operate at much lower than max RPM, but that is what makes them so reliable and able to work in various harsh conditions. You don't want to run your JD motor any faster than it is capable of now.
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#3
Quote from redpoint5 View Post :
What do you mean by "the speed tops out long before the RPM"? Speed is directly proportional to engine RPM
Transmission?
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#4
you could try premium fuel or racing fuel.
Also bigger tires on the drive tires will make it have a higher top speed.
The X304 has hydro transmission so unless you are going to try and tweek that, I don't think there is much else for you to do.
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#5
Are looking for something like in the picture Big Grin

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#6
Quote from redpoint5 View Post :
What do you mean by "the speed tops out long before the RPM"? Speed is directly proportional to engine RPM

Tractors and lawn mowers operate at much lower than max RPM, but that is what makes them so reliable and able to work in various harsh conditions. You don't want to run your JD motor any faster than it is capable of now.
Not on the X304. The speed tops out at a governed amount, any increase in throttle increases PTO speed, but not the wheel speed. There is a pedal that controls how fast you go and a throttle that controls engine speed. So if the throttle is at the lowest setting and you push the pedal all the way, you will go a certain speed (slow). As you increase your throttle, your speed will increase proportionally until a certain point and then you are maxed out on wheel speed even though you have more throttle to go.
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#7
Its governed for a reason, probably several. Its likely that it becomes unstable and could roll if you go faster. The parts are engineered for a specific stress rating and running things faster exceeds this. While you might be able to find help here on SD about computer mods or car repair work I doubt you will find many lawnmower hot rodders.
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#8
Quote from beefcake78 View Post :
you could try premium fuel or racing fuel.
Unless the engine is designed for a higher octane fuel, it will likely give worse performance. Higher octane fuels even have very slightly less energy density than "regular". I don't know of any lawnmowers that take premium fuels.

Quote from slipgate View Post :
Not on the X304. The speed tops out at a governed amount, any increase in throttle increases PTO speed, but not the wheel speed. There is a pedal that controls how fast you go and a throttle that controls engine speed. So if the throttle is at the lowest setting and you push the pedal all the way, you will go a certain speed (slow). As you increase your throttle, your speed will increase proportionally until a certain point and then you are maxed out on wheel speed even though you have more throttle to go.
Ah, I had no idea such a system existed; I've never mowed with something as nice as a Deere. After describing the governed hydro system to me, you really don't want to be modding it. I'm sure it was designed to flow a certain rate for a reason, and increasing that rate is sure to cause wear or safety issues.

Did you sell your car to buy this nice machine? Has your license been suspended and you've got a long lawnmower commute you are trying to cut down on?Stick Out Tongue
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#9
Quote from redpoint5 View Post :
Unless the engine is designed for a higher octane fuel, it will likely give worse performance. Higher octane fuels even have very slightly less energy density than "regular". I don't know of any lawnmowers that take premium fuels.
laugh out loud perhaps there's a market....NASCAR sponsored mowers?

Quote :
Ah, I had no idea such a system existed; I've never mowed with something as nice as a Deere. After describing the governed hydro system to me, you really don't want to be modding it. I'm sure it was designed to flow a certain rate for a reason, and increasing that rate is sure to cause wear or safety issues.
Yeah, I'm pretty sure taking hairpins at a high rate of speed and flipping a machine with spinning blades of death constitutes a safety issue. Smilie
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#10
I'm not looking for a lot of extra speed while I am mowing. I have an acre and a half and I park the tractor in the shed at the end of the 1.5 acres. I have a spreader and pull cart for it and it would be nice to be able to get from one end of the land to the other a little quicker. Maybe the X324 is a little faster - might be time to upgrade! Problem is the X324 is around $1500 more.
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#11
Quote from bonkman View Post :
Yeah, I'm pretty sure taking hairpins at a high rate of speed and flipping a machine with spinning blades of death constitutes a safety issue. Smilie
I have rolled darned near anything capable of rolling. ATV, VW beetle, motorcycles, even a lawnmower pulling a trailer full of boulders while mowing... Experience- I has it.bulb
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#12
If it has a governor you can remove that. You can put a larger pulley in the front at the motor shaft which will make a big difference, of course you may then need a different length belt.

However, I recommend you leave it alone for safety reasons. Taking more time is better than rolling a mower with spinning blades.
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#13
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#14
How old is the machine? Could be belt wear and starting to slip. If you've run it for a couple of years, you may just need to replace the belts or the blades.

Have you kept up with checking the fluids and kept them topped off? I believe this machine would require oil level checks as well as a transmission oil check. Oil should be drained and replaced each season -- not sure what the transmission oil specs would be on draining/changing -- or just adding to if it was low. Check for leaks if the transmission is low.

Air filter that is clogged would cause slowness -- have you cleaned it or replaced it?
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#15
sounds to me like the engine needs to be at X rpm in order to cut thick/heavy stuff, so it reserves some room for additional cutting as opposed to additional speed
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