[tige]

I have a 2000 model r72 we have had trouble with third gear. First it was the bearings loosing pre load from the housing flexing. Agco fix this by making stronger housing. The last time three teeth were torn off. I am interested to Know if any one out there has had the same problems. thanks

 

[greencountry]

we have a r65 that is also popping out of third gear, sometimes it is hard to find and sometimes it just popps out. Have not looked into it yet

 

[rcfynrdt]

Nddan you talk of them changing 2nd gear on newer machines to 7.5 mph is there a way to put the old gear back in the new machines. Here we have trouble in hills wasting power and liked the old 5 mph gear that is as fast as we want to run and don't like wasting the power of having to run in that high of gear being 1st is to slow.

 

[nddan]

Trannys have been quite rock solid in our area. Change oil from time to time. Sometime in '94 they put in gears for 7.5MPH 2nd and that is normal operating gear. 3rd rarely used. I would lean toward your bearings not being tight enough from day one and maybe teeth you lost later were cracked when shaft was loose.

On the R65 I would put the thing in 3rd and then take out the pins on shift rails. You need to be sure the linkage is allowing the rails to get into there detents. May need to lengthen or shorten a turnbuckle. Good luck

 

[tige]

Thanks for the replys. Nddan we have had the tranny out about 4 times each time it has been rebuilt new bearings and gears have been fitted. is there any way to slow down 3rd to about 10 mph or change it over to a r75 tranny and final drives. other wise we will keep plodding along in 2nd.

 

[medicineman]

we have a gleaner guru in our area that says we should run in 3rd gear rather than 2nd gear because the hydro runs cooler in 3rd. Any comments on this situation. Personally I would think 2nd should run cooler because of the mechanical advantage of 2nd however perhaps I am missing something here?

 

[scandinavian]

You won't move as much oil when you use third gear, and as long as it "run free" and don't go in hi pres releif your oil should be cooler.
Speed regulation will be more correct in 2nd, and I think if you can't keep the oiltemp in spec there is something wrong.
I would use 2nd gear if you can run at the speed you want.

 

[kswind]

"You won't move as much oil when you use third gear, and as long as it "run free" and don't go in hi pres releif your oil should be cooler."

Sorry, this is a misperception. All hydros' leak oil internally past the cylinder bores. The higher the pressure, the more leakage and the more heat. Always run in the lowest gear that gets the job done.

 

[medicineman]

Thanks for the quick explanations on the subject of hydro's. Happy harvesting
Medicineman

 

[nddan]

rcfynrdt, I don't now how newer of a machine your talking about but if the P/N for gears for your year of machine is the same as they call for in a '95 machine I would say you can switch back. If the P/N is different I could just not tell you. Might be a chance it would work but you would have to have an older and newer trans apart so you could measure shafts where gears sit and distance between shafts. I know input shaft changed but I believe it is a match to old except bushings are built into shaft on newer. Sorry can't answer you.

tige, I really doubt there is a way to slow down 3rd. If you are straining trans that bad to have excess trouble in your operating conditions you may be smart to think about RWA. This will slow down 3rd and take a fair amount of load off of the trans.

I think lowest gear that will get you the speed you want would be best.

 

[glennw]

rcfynrdt, if you are talking about an R 72 then you should be able to put slower gears in for 2nd gear. We have done it to a 96, 2000, and 2002 and taken them back to the 5.5 mph for our steep hills in the PNW. With our heavy yields we don't need the higher speed anyway. It takes a little trimming in the case to get a gear changed.

 

[richardbessey]

how much roading are you doing with it?
I forget the speed but it was almost as fast as it would go, after that we could not get it in a lower gear. We ended up swapping out the entire tranny.

 

[scandinavian]

As I said I would use 2nd gear too. But I have to disagree with kswind regarding to oiltemp. If you are traveling at the at the same speed in 3rd gear on a even field without stalling the hydro, you will heat the oil more with the hi flow at a bit lower pressure due to the fact that you have that many more piston strokes in the oilmotor to leak from( pressuredrop=heat). I would agree if you had the same flow with 2 different pressures, the highest pres would create the most heat. So it all depends on the conditions you work under.
Just my 2 cents