charleyfarmall
Platinum Member
If I tried mowing in C range I would be bouncing off the roof. I can cut hay over 6mph easily in B range on the smooth sections of field. As others have said, C range is intended for transport.
JD4520 e-Hydro not pulling up slopes
- Thread starter belky
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- john deere 4520
mfreund
Veteran Member
On page 32 in the operation section it says that it can be set. I have seen the procedure. Need to find it now. Could have been in a forum or in Technical manual. I will look for it.
jenkinsph
Super Star Member
Furu,
I see a lot of smooth farms but it does take larger equipment than a compact to get there.
Cartod
I agree a hydro uses up a few horsepower but also most tractors have a very high weight to hp ratio so going up a steep incline is going to slow them to a crawl. A gear tractor such as your 820 will do the same in high gear (8th). The older tractors would allow you to lug the motor but the new tractors keep you from doing this to a great extent. I have to deal with steep grades often and prefer a higher hp tractor in a given size for this reason. A properly set up 4120 will pull the same draft load as a 4720 will but the 4720 will run circles around it.
I see a lot of smooth farms but it does take larger equipment than a compact to get there.
Cartod
I agree a hydro uses up a few horsepower but also most tractors have a very high weight to hp ratio so going up a steep incline is going to slow them to a crawl. A gear tractor such as your 820 will do the same in high gear (8th). The older tractors would allow you to lug the motor but the new tractors keep you from doing this to a great extent. I have to deal with steep grades often and prefer a higher hp tractor in a given size for this reason. A properly set up 4120 will pull the same draft load as a 4720 will but the 4720 will run circles around it.
Had a short run around today hauling some sand. Switched load match off and found tractor pulling better and more responsive to pedal up hills. 1800-2000 rpm and pulls well up hill in A/B. Somewhat better than pref. in C but still struggles on the slightest incline. So If pulls better up hills/ more responsive with Load Match off, how does it help with working a rotary slasher?
in what situations Being new to hydrostatic/ turbo setup, didn't realise you had to keep up high revs to get moving up hills. Just thought I'd be wearing motor constantly going at higher revs but would seem actually healthier for motor? As for motion Match, perhaps a slight difference b/w long and short but definitely no skidding on lawn on short. Due for 12 month service, will get technician to have a look.
in what situations Being new to hydrostatic/ turbo setup, didn't realise you had to keep up high revs to get moving up hills. Just thought I'd be wearing motor constantly going at higher revs but would seem actually healthier for motor? As for motion Match, perhaps a slight difference b/w long and short but definitely no skidding on lawn on short. Due for 12 month service, will get technician to have a look.
jenkinsph
Super Star Member
belky,
Your last sentence is the best thing to do, have it checked out. I haven't had to switch settings on my load match ever, would have to look in the book to do so and haven't had an issue to provoke that. I use the upgraded cruise and auto throttle most of the time and both work very well. The C range is high enough that I don't use it for tractive jobs.
Your last sentence is the best thing to do, have it checked out. I haven't had to switch settings on my load match ever, would have to look in the book to do so and haven't had an issue to provoke that. I use the upgraded cruise and auto throttle most of the time and both work very well. The C range is high enough that I don't use it for tractive jobs.
cartod
Platinum Member
nothing you have described is any different than my 3320. I'd say get used to it.
TSO
Elite Member
Have you changed your hydraulic filter lately? Might be worth a change, sometimes they get clogged up and can interfere with your system.
Thanks guys.
Tso, machine 12 months/ 120 hours old, so hopefully not needing hydraulic change. Will get annual service soon though and get technicians' advice; hopefully he has experience with 4020 CUT's.
Jenkinsph:yes, I was using auto cruise yesterday and it runs very smoothly, perhaps as there's no throttle involved so I'm not feeling the need to push pedal further and further to get up hills, it's done for me. Perhaps just preconception/ inexperience is the problem, just didn't seem right to have to push the pedal to the floor to get up a hill, and have usually backed off from doing this. So high revs and pedal near the floor are ok then? Also, do you use auto throttle when slashing or using loader, or just for travel?
Wasn't using C range for actual work, just moving across property ; just thought I'd be able to move "up" property as well. If that's normal, not a problem, just wanted to be sure. Note also that I did speak to a sales rep. at a field day, and he thought that small grades should not be a problem in C, which got me thinking. He also mentioned a simple spring involved with the hydraulic control valve that could be a problem. Again, I'll get the technician to have a look.
With load match off tractor now travelling up hills without feeling restricted and with cruise on, it's feels effortless, as long as revs are over 1800-2000.
Thanks for the advice all.
Tso, machine 12 months/ 120 hours old, so hopefully not needing hydraulic change. Will get annual service soon though and get technicians' advice; hopefully he has experience with 4020 CUT's.
Jenkinsph:yes, I was using auto cruise yesterday and it runs very smoothly, perhaps as there's no throttle involved so I'm not feeling the need to push pedal further and further to get up hills, it's done for me. Perhaps just preconception/ inexperience is the problem, just didn't seem right to have to push the pedal to the floor to get up a hill, and have usually backed off from doing this. So high revs and pedal near the floor are ok then? Also, do you use auto throttle when slashing or using loader, or just for travel?
Wasn't using C range for actual work, just moving across property ; just thought I'd be able to move "up" property as well. If that's normal, not a problem, just wanted to be sure. Note also that I did speak to a sales rep. at a field day, and he thought that small grades should not be a problem in C, which got me thinking. He also mentioned a simple spring involved with the hydraulic control valve that could be a problem. Again, I'll get the technician to have a look.
With load match off tractor now travelling up hills without feeling restricted and with cruise on, it's feels effortless, as long as revs are over 1800-2000.
Thanks for the advice all.
TSO
Elite Member
Ok... on every tractor I've had, I've changed the oil & hydro filters within the first 50-100 hrs. Never know what kind of debris you'll create on a new engine & hydraulic system while it's breaking in. Changing the hydro filter on my Massey at 50hrs actually quieted down the HST whine.
