Hopefully getting new 7520 4WD ordered this week!

[SPYDERLK]

My 4110 also lists two separate rates, but I believe the hydraulic system rate is a combined rate. I noted that this seems to be a pretty standard practice from all manufacturers, at least for the CUTs. I have noticed I can increase the RPMs and get faster response time on my FEL.

Keith, Ive seen #'s of around 10 or 12GPM listed for many CUTs without mentioning anything about the PS portion. This could be a combined figure. However, the Mahindra breakout is either not consistent or if consistent, doesnt add up. The #s are 5 and 11.4 GPM for the 6520 4WD, and 5.2 and 17 for the 7520 4WD. Both tractors take the same loader - the ML275. The published raise boom time @2.5krpm for the 6520 is 9.3sec and for the 7520 is 6.2sec. This is a 3/2 ratio , agreeing with 17/11.4 = 1.49, but at extreme odds with the combination deconstructed to give (17-5.2)/(11.4-5)= 11.8/6.4= 1.84.
These specs dont add up. Further, even with a 6.5second raise time it doesnt compute to 17 delivery. Now that I have the tractor, and can see what the cylinders are I know that the delivery needed to raise in 6.5sec is about 13. Mine wont go up that quickly.
Larry

 

[SPYDERLK]

Larry,at the 4000' elevation I should have no power loss what so ever. I believe that you have to be above 12,000' to notice any power loss when you have a turbo.

If changing the exhaust works, be sure to let us know. I know that I would consider it. Oh, the only time that I have been at a loss for traction was when I have been disking. Grading of all sorts, 96" rear blade, 84" Road Boss road scraper, 80" rollover Gannon or working with 84" dirt bucket, 78" rock bucket, and 84" grapple, no problems.

Also thinking about doubling up on the front end weights, (2 sets) it would be nice to have all the traction and not have to have the loader bouncing around out in front.

Brian

Ran into this post of long yore & wanted to comment about the exhaust thing. I could detect no benefit removing the exhaust stack so went no further there. I did however take a look at the intake. There is a long intake hose leading from the filter to the turbo. The inside of this tube has a spiral spring to keep it open in case the filter becomes very badly plugged. Removal of this spring waaay back has led me to believe that it impedes intake flow significantly and is not needed if you ever pay any attention to the tractor. With the spring I got exhaust smoke on boost as the rpms lugged down to 1500. Without the spring it never smokes except when you whack it open from low idle. Now if I could figure out how to boost the fuel juust a little. ...
larry