Deere new models

[LBrown59]

The X700 series is basically a big riding lawn mower .

But A JD 2305 or Kubota BX is not.

 

[Gittyup]

I'm not home, so can't measure. But that frame looks identical to my 425 (same frame as 455).

 

[skidoo]

Skidoo,

The frames are not as think as the frames on the tractors we use, but the key here is the frame design. The X series tractors use essentially a unit body design frame which has several designed reinforcement points. It is plehty strong. In my opinion, it likely is as strong, if not stronger, than a 2305 frame.

John M

OK, I see that is has a number of different reinforcements and being 7 gauge steel makes it relatively hefty compared to other garden tractors. I am satisfied that it is good for the intended purpose.

It sure it nice handling. My son left his truck locked and parked about 6 feet in front of the garage door. He wasn't around and the spare key did not work to unlock it. So, I just opened the door and steered the tractor around the front of the truck and house. That would have been much more difficult with 2WS.

The Dealer picks it up on Monday to fix any and all issues.

 

[LBrown59]

The Dealer picks it up on Monday to fix any and all issues.

Have you got it back yet?

 

[ovrszd]

brownie has a serious case of green envy... Post after post about green tractors.

I think brownie is on the payroll here. He's hired to antagonize members and raise the post count. He's worth every penny they pay him.

But then if he's not getting paid,,,, he's just cheap entertainment isn't he...

 

[skidoo]

I got the X749 back today! The holidays tend to make for slow service. But, that is ok. It's not like I need to mow snow right now.

Anyway, the dealer fixed a coolant leak at the block heater, but they could not find a problem with the engine dying. The analysis indicated that with the hydro fluid cool or cold, there is much more load on the engine which is increased more with the diff lock. Sure enough, I drove it up and down my driveway for about 15 minutes, and then tried the diff lock on the hilly part of the driveway. It did well with it starting to die only on the steepest part of the drive and the pedal at max. If I backed off just a little, it would resume engine speed. So, I assume in warmer weather, it will not be a problem.

When it does this, the engine rpms drop rapidly and will quickly die if continued at that load. This is substantially different than my 2520 where I can put it in high range and go up the driveway and I can adjust the speed (load) to keep the rpms just below max, say dropping from 2700 to 2400 rpms. A little more speed will drop the rpm a little more, a little less speed will increase rpms. But, with this X749, the rpm drop off is very rapid.

Has anyone else with an X7xx Diesel experienced the engine rpms drop rapidly under a heavy load or when cold.

 

[ccsial]

skidoo: As I posted earlier my X748 does not do this. The X749 must have a different hydraulic system since the Front axle uses hydraulic motors. My 748 uses a drive shaft from the transmission. I wonder if this problem is unique to the AWS models.

 

[skidoo]

skidoo: As I posted earlier my X748 does not do this. The X749 must have a different hydraulic system since the Front axle uses hydraulic motors. My 748 uses a drive shaft from the transmission. I wonder if this problem is unique to the AWS models.

Can you load the engine such that the rpms drop? If so, does the rpms drop rapidly or more gradual? I'm not sure that it is a significant problem yet and yes it may be unique to the AWD 4WS model. But, I believe your engine is the same so, I would think the loading of it should respond similarly.

One more thing to add. I am convinced it is not just with the diff lock. When it was cold, it occurred with normal AWD when it had sufficient traction. So, it does seem to be related to the load on the engine.

 

[ccsial]

Can you load the engine such that the rpms drop? If so, does the rpms drop rapidly or more gradual? I'm not sure that it is a significant problem yet and yes it may be unique to the AWD 4WS model. But, I believe your engine is the same so, I would think the loading of it should respond similarly.

I have never noticed the RPM drop. I have been pushing snow up on the ditch pretty hard in 4wd with diff lock on and the engine does not even change pitch. That is at about 3/4 throttle. I did break the bead on a rear tire doing that. I increased the PSI to 10 and hope it does not do it again. I never noticed any drop this summer when mowing either. Just a bit when I engage the PTO at 1/2 throttle.

 

[skidoo]

I have never noticed the RPM drop. I have been pushing snow up on the ditch pretty hard in 4wd with diff lock on and the engine does not even change pitch. That is at about 3/4 throttle. I did break the bead on a rear tire doing that. I increased the PSI to 10 and hope it does not do it again. I never noticed any drop this summer when mowing either. Just a bit when I engage the PTO at 1/2 throttle.

Looks like I need to do some more testing.