Auto throttle..?

AKfish · Jan 11, 2010

jenkinsph said:
AKfish,

No the throttle advances proportionallly with how far you press the pedal. It is intuitive and similar to pressing the pedal on a car or pickup with an automatic transmission with the exception that you don't shift through the various gears. So much smoother and controlled, you need to try it out I guess.

If that's the case - it would seem to be a great loader function - much like my experiences with the bigger JD 544 and JD 644 (maybe 624) wheel loaders.

AKfish

chevyman29 · Jan 11, 2010

my tractor may be the exception but it doesnt really work that smoothly while using this feature.

Samandothers · Jan 11, 2010

I usually leave the Auto Throttle on my L4240, maybe I am lazy. For the work I have done with the loader, grapple it has been great. I have had no desire to control the throttle manually.

jenkinsph · Jan 11, 2010

chevyman29 said:
my tractor may be the exception but it doesnt really work that smoothly while using this feature.

I am no expert on the computers in these tractors but some of the responses are adjustable, might be part of your issues.

chevyman29 · Jan 11, 2010

well i no theres something called motion match but that was optional . i wonder if the dealer can adjust ? that may help the sitution i need to call tommorow and ask .

jenkinsph · Jan 12, 2010

chevyman,
Not sure about the cruise you have but I am referring to the upgraded cruise with motion match and loadmatch that is a $99 option on the 4520. I really never tried out the standard cruise setup because the first thing I did when I got the new tractor was install all of the options.

orlo · Jan 12, 2010

chevyman29 said:
well i no theres something called motion match but that was optional . i wonder if the dealer can adjust ? that may help the sitution i need to call tommorow and ask .

All the 3000 and 4000 series have motion match. If you get the automotive cruise you get additional buttons that let you preset a 'slow' and 'fast' slowdown as well as accelerate/decelerate buttons and Speed match.

Motion match controls how fast the hydro will change speed when you accelerate and decelerate. For example, if you are on the 'short' setting and let off the hydro while doing 8mph over grass you'll probably skid on the grass. If you set it to 'long' it will slowly back off the hydro even if you side step it. It basically does the same thing (when on the long setting) as slowely backing off or pushing down on the pedal.

I usually use the longest setting when I mow or am constantly going over the grass, and the shortest setting when I'm doing loader work (I have my buttons preset to this). It does make a significant difference.

You can adjust this without the extra buttons by using the mode button and blinkers I think (Don't ask me how since I've forgotten the procedure). It's well worth it to get the automotive cruise and upgraded buttons.

The stock cruise without increment and decrement isn't very usefull since you can't change the speed once you set it. The upgraded buttons also let you access the 'SpeedMatch' feature which let's you set a max forward speed when you pin the hydro pedal. Nice when you don't want to go too fast but can't use cruise.

AKfish · Jan 12, 2010

orlo said:
All the 3000 and 4000 series have motion match. If you get the automotive cruise you get additional buttons that let you preset a 'slow' and 'fast' slowdown as well as accelerate/decelerate buttons and Speed match.

Motion match controls how fast the hydro will change speed when you accelerate and decelerate. For example, if you are on the 'short' setting and let off the hydro while doing 8mph over grass you'll probably skid on the grass. If you set it to 'long' it will slowly back off the hydro even if you side step it. It basically does the same thing (when on the long setting) as slowely backing off or pushing down on the pedal.

I usually use the longest setting when I mow or am constantly going over the grass, and the shortest setting when I'm doing loader work (I have my buttons preset to this). It does make a significant difference.

You can adjust this without the extra buttons by using the mode button and blinkers I think (Don't ask me how since I've forgotten the procedure). It's well worth it to get the automotive cruise and upgraded buttons.

The stock cruise without increment and decrement isn't very usefull since you can't change the speed once you set it. The upgraded buttons also let you access the 'SpeedMatch' feature which let's you set a max forward speed when you pin the hydro pedal. Nice when you don't want to go too fast but can't use cruise.

Dang.... I thought it was a "simple question".... Now, I'm really confused!

I'll probably have to re-read this a couple of times...

AKfish

Glen Watkins · Jan 12, 2010

All explained in the manual and these upgraded controls are nice!

chevyman29 · Jan 13, 2010

yeah ive got my dealer getting some prices together on adding these featurs

jenkinsph · Jan 13, 2010

Chevyman29,
Well it is very simple to install yourself, for $99 +tax you get a small box with a small wiring harness and three rocker switched. The switches snap into the blank holes on your side switch panel and the wires are already in place beneath the panel. Maybe a 20 minute job.

chevyman29 · Jan 13, 2010

sounds simple enough to me . ive got a issue where the front bucket doesnt curl down properly whenever you hold the lever all the way over .it acts like its in a bind so i may let the dealer install it whenever they take a look at that

Ramairfreak98ss · Jan 20, 2010

Duffster said:
What's stupid about it?

Perfect setup IMO.

our 09 4720 has the switch for it.. sometimes its good sometimes not, basically you set your idle like normal then it will throttle up as much as you push the pedal/forward down....

its good at times, but if your working with heavy stuff where you need the rpms and torque to keep going, starting the engine low and then trying to have it accellerate with a load makes it take too long to spool up the turbo and make power.

AKfish · Jan 21, 2010

Ramairfreak98ss said:
our 09 4720 has the switch for it.. sometimes its good sometimes not, basically you set your idle like normal then it will throttle up as much as you push the pedal/forward down....

its good at times, but if your working with heavy stuff where you need the rpms and torque to keep going, starting the engine low and then trying to have it accellerate with a load makes it take too long to spool up the turbo and make power.

Hmmm... OK, what would performance be like if you manually set the throttle to say... 1,400rpm's and clicked the auto throttle on?

The engine would already be working in a good spot torque-wise and spooling up the turbo and rpm's is not that steep a jump (the lag would not be so great) - yes/no?

AKfish

jenkinsph · Jan 21, 2010

Ramairfreak98ss said:
....

its good at times, but if your working with heavy stuff where you need the rpms and torque to keep going, starting the engine low and then trying to have it accellerate with a load makes it take too long to spool up the turbo and make power.

Haven't had that as an issue so far, mine seems to spool up quickly. Might be a function of the comuter controls?

chevyman29 · Jan 23, 2010

after i installed the three switches i no longer have auto throttle ?? have i missed something ? i have load match motion match the good cruise but i thought i should still have auto throttle?? any ideas?? im also getting a error o7 code .

jenkinsph · Jan 23, 2010

I don't have my book here with me but have you looked up the code to see what it is?

I would think you can turn on your switches and have the auto throttle come on. If not you may have a loose switch connection, check the connectors to see if that helps.