Deere new models

[jcmseven]

Skidoo,

As much as I hate to say it, I think you have an issue with your machine on this. Perhaps JD DID adjust the hydro flow on its AWS machines, but my old 595 never would drop RPM's. Your machine should not either. If it does, something is wrong with it. It has a ton of power for its weight and should easily climb any hill it can stay "rubber down" on. My 595 would never bog, even going up major steep hills while operating a PTO attachment.

John M

 

[unit40]

Skidoo,

As much as I hate to say it, I think you have an issue with your machine on this. Perhaps JD DID adjust the hydro flow on its AWS machines, but my old 595 never would drop RPM's. Your machine should not either. If it does, something is wrong with it. It has a ton of power for its weight and should easily climb any hill it can stay "rubber down" on. My 595 would never bog, even going up major steep hills while operating a PTO attachment.

John M

I agree. I think there must be some type of problem. Although my X744 is AWS, it is not AWD. But my engine has never bogged down at all. I would say that the tranny feels some resistamce before the tires start to slip, but the motor runs full bore without a skip.

 

[skidoo]

It cuts back quickly. It runs full bore with plenty of power, but when it reaches that point, zero power. Its not like it gradually runs out of power. For those who have the Diesel, do you know what system parts can cut the engine quickly? Where are all the safety interlocks? What does a safety interlock cut, fuel pump, injectors, or what?

I am going to test different forms of load such as pushing or pulling against something. Perhaps it is the G forces that moves a loose connection somewhere. I am not pleased that the dealer could not duplicate the problem in an hour and a half of operating it. I really like this tractor and would hate to return it for the 30 day satisfaction guarantee. The season right now is not the most suitable for testing. If I keep it, it is covered by warranty for 4 years. What would you do?

 

[ccsial]

I would try to find a test that causes it to cut out that can be duplicated by the dealer.

Your manual should have a section on testing all the interlocks. That should tell you what interlocks there are. Once it is running and the PTO is NOT engaged I don't know what could kill the engine.

You may try making a new post with a different title. The title of this post is probably not drawing a lot of attention.

 

[skidoo]

Problem Solved!!

It turns out to be the seat switch. Apparently, my butt isn't heavy enough! When I press hard on the go pedal, my back goes against the back of the seat, thereby reducing some downward force. When I press on the diff lock, that takes even more force against the back of the seat, reducing the downward force further. Apparently, the reduction is just enough to trigger the empty seat switch. If I take my hands off the steering wheel and hold on to the fender handles and pull myself into the seat while pressing the diff lock and go pedal, it works fine!

Now that I know what causes it, I can deal with it. I'm looking forward to spring!


One other thing I may want to deal with is the front tires easily picks up small rock (i.e. pea gravel for the ice) from the driveway and throws it on top of the deck. For those with the SE model, does that make a significant difference? It seems the SE is not an option for the X749, but I wonder if the fenders could be adapted or come up with some other way to reduce the rocks on the deck.

 

[ccsial]

Glad to hear you found it skidoo. That was my first suspision as I posted a while ago. I disabled my seat switch the day I got my tractor. Sure glad that is all it was. You'll sleep good tonight.

I do like the fenders on my 748SE. They keep slush and rocks in check. The fenders may be able to fit your 749 but I'm sure you would have to fabricate some mounts. The 748 axle is totally different from the 749.

 

[LBrown59]

If I keep it, it is covered by warranty for 4 years. What would you do?

All you get out of a 4 year warranty on a lemon that can't be fixed is the aggravation of battling the problem for 4 years at somebody elses expense.
Then starting in year five you get to pay for the grief. (I know, been there done that with A MTD Wards lawn tractor)

 

[LBrown59]

Glad to hear you found it skidoo. That was my first suspision as I posted a while ago. I disabled my seat switch the day I got my tractor. Sure glad that is all it was. You'll sleep good tonight.

I do like the fenders on my 748SE. They keep slush and rocks in check. The fenders may be able to fit your 749 but I'm sure you would have to fabricate some mounts. The 748 axle is totally different from the 749.

He sure should!

 

[LBrown59]

I am not pleased that the dealer could not duplicate the problem in an hour and a half of operating it.

My wife just told me why the dealer didn't find the problem while he had your tractor.

 

[LBrown59]

Now that I know what causes it, I can deal with it.

Check the switch and see how it's mounted.
If it has slots rather than holes for the bolts that hold it on it may be asjustable.
Another trick i've used is to place a small piece of foam tape on the seat where the switch button contacts it.
You may be able to gain enough distance that way to keep the switch on;depending on how thick of a piece of foam tape you can get by with.
== L B ==
PS
If all else fails put on and extra 100 pounds and a pair of elevator shoes.