john deere 4120 hydro: John Deere Review  -- John Deere Tractors Discussion Forum and Review john deere 4120 hydro: John Deere Review -- John Deere Tractors Discussion Forum

  parts   |   manuals   |   discussion   |   photos   |   podcast   |   reviews   |   specs   |   dealers   |   classifieds   |   contact   |   faq   |   myProfile   |   home          Login Now | Sign Up


FAQ:   What is a tractor?

Forum Index
New As Posted | Active Subjects



www.emerichsales.com - New & Used Equipment
          View Tractors For Sale!


www.partsbynet.com - Lawn and Garden Equipment Parts


Bernardsville Landscape Lighting
Click to Post a New Message!

Discussion Boards > Active Subjects > Messages as Posted > John Deere Review Forum

Page [ 1 ] | 2 | 3 | | Next >>
Reply | Pop Up Window Reply | Add PhotoAdd Photo
 02-25-2006, 16:06 Post: 125119
dan burbank
2006-02-25 16:06:46
Post: 125119
 john deere 4120 hydro

I have a new john deere 4120 4 by 4 hydro error 01 flashed on the instrument panel and now the tractor will not go forward or backwards I have spoke to the dealer and the machanic will not be in until monday. I use this machine every day and have been somewhat dissapointed with this tractor!! I have always been a john deere person, but I am slowly changing my mind. Any ideas?

Thanks,

Dan Burbank






Reply to PostReply | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo




Bookmarks: Digg It | Del.icio.us | Stumble This

 02-25-2006, 16:41 Post: 125122
Chief



View my Photos

View my Photos  Pics
Join Date: Jul 2003
Location: Southwest MiddleTennessee
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster
Posts: 4278

2
Filter by User
 john deere 4120 hydro

If the fault codes for the 4000 Ten Series tractors is the same as the Twenty series. The forward pedal potentiomenter is the problem. It may be bad or require recalibration. I doubt it but you may get lucky and be able to reset the calibration sequence by disconnecting the batter for a few minutes and retry starting the tractor and see what happens. Sounds like you may need a forward pedal potentiometer. Have you washed the tractor resently or has it been subjected to a lot of rain recently?






Reply to PostReply | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo




Bookmarks: Digg It | Del.icio.us | Stumble This

 02-25-2006, 16:46 Post: 125124
kwschumm



View my Photos

View my Photos  Pics
Join Date: Feb 2003
Location: NW Oregon
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster
Posts: 5764

9
Filter by User
 john deere 4120 hydro

If you've driven through some brush lately it's possible that something caught on a wire under the tractor and pulled it loose. Been known to happen. Sometimes the wires aren't tied up and tucked away tightly.






Reply to PostReply | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo




Bookmarks: Digg It | Del.icio.us | Stumble This

 02-26-2006, 08:57 Post: 125148
DRankin



View my Photos

View my Photos  Pics
Join Date: Jan 2000
Location: Northern Nevada
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster
Posts: 5105

5
Filter by User
 john deere 4120 hydro

The more things change the more they remain the same. Brand new model..... same old problem.

I was not aware that the HST pedals were hooked to potentiometers. Is that how the signal gets to the transmission?






Reply to PostReply | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo




Bookmarks: Digg It | Del.icio.us | Stumble This

 02-26-2006, 09:26 Post: 125149
kwschumm



View my Photos

View my Photos  Pics
Join Date: Feb 2003
Location: NW Oregon
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster
Posts: 5764

9
Filter by User
 john deere 4120 hydro

The way it probably works is the pots wire up to a controller board which then modulates the solenoids to the transmission. That's how they can easily and inexpensively implement features like auto-style cruise control and load-match. Just add some switches and plug 'em into the harness to the controller board. If the pots were directly controlling the solenoids you couldn't easily add these features.






Reply to PostReply | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo




Bookmarks: Digg It | Del.icio.us | Stumble This

 02-26-2006, 16:31 Post: 125172
DRankin



View my Photos

View my Photos  Pics
Join Date: Jan 2000
Location: Northern Nevada
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster
Posts: 5105

5
Filter by User
 john deere 4120 hydro

Fly-by-wire tractors? Too many moving parts for me.






Reply to PostReply | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo




Bookmarks: Digg It | Del.icio.us | Stumble This

 02-26-2006, 16:57 Post: 125173
kwschumm



View my Photos

View my Photos  Pics
Join Date: Feb 2003
Location: NW Oregon
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster
Posts: 5764

9
Filter by User
 john deere 4120 hydro

You mean not enough moving parts, don't you Smile If there's a design flaw here it's because there is no simple way for the operator to calibrate the pots. It wouldn't be hard to do in the controller. Put it into a calibration mode, then push a pedal all the way in and let it out. That would give the controller enough info to know the calibration limits.






Reply to PostReply | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo




Bookmarks: Digg It | Del.icio.us | Stumble This

 02-27-2006, 09:09 Post: 125230
DRankin



View my Photos

View my Photos  Pics
Join Date: Jan 2000
Location: Northern Nevada
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster
Posts: 5105

5
Filter by User
 john deere 4120 hydro

Okay.... how about needless sophistication?

Saw the same thing happen in the Dialysis field years ago. Replaced simple, reliable air pressure gauges with a transducer and an electronic readout. And then hire a lot more service techs to fix/calibrate/repair/replace the things.

We are talking tractors for crying out loud! Give me some push-rods and mechanical valves!

I can do the load match function with my eyes, ears, feet and the seat of my pants while I am steering the thing.

End of Rant. It is safe to come out now.






Reply to PostReply | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo




Bookmarks: Digg It | Del.icio.us | Stumble This

 02-27-2006, 09:25 Post: 125237
Chief



View my Photos

View my Photos  Pics
Join Date: Jul 2003
Location: Southwest MiddleTennessee
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster
Posts: 4278

2
Filter by User
 john deere 4120 hydro

Mark, my 4410 has been a great tractor. That having been said, I agree with the needless sophistication comment. I have my concerns about how this system will survive over a 20 year or more life span. In the future, I will DEFINITELY be buying a simple gearshift tractor with a sync reverser. I may splurge and get a power reverser. eHydro is nice but it does have its minor aggrivations in that it does not respond as fast or as accurately as I want. I have discovered this in situations where I hit a rock or debry and demanded FULL forward speed IMMEDIATELY to get the tractor mower out of the situation and the tractor just sat there. Yes, I realize this is a safety feature built into the system but I DON'T like it one bit. There is also a slight delay in going from forward to reverse that I don't like either. These are small faults that I have gotten accustomed to but I will still go the basic route in the future.






Reply to PostReply | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo




Bookmarks: Digg It | Del.icio.us | Stumble This

 02-27-2006, 10:06 Post: 125240
kwschumm



View my Photos

View my Photos  Pics
Join Date: Feb 2003
Location: NW Oregon
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster
Posts: 5764

9
Filter by User
 john deere 4120 hydro

I really like the eHydro and the worst thing I can say about it is it whines a little like most HSTs. For working in and around a thick stand of trees where you're often only a few inches from collision nothing beats it. This needless sophistication is the way of the world. Soon we won't be able to buy a vehicle without an auto tranny and black box. Most engineers these days look at a problem and figure out ways to solve it with electronics and software. There's little point in standing on top of the world and yelling "Stop!" (apologies to WFB Jr).






Reply to PostReply | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo




Bookmarks: Digg It | Del.icio.us | Stumble This

Reply | Pop Up Window Reply | Add PhotoAdd Photo


Page [ 1 ] | 2 | 3 | | Next >>

Discussion Boards > Active Subjects > Messages as Posted > John Deere Review Forum

Thread 125119 Filter by Poster:
Art White 4 | Chief 2 | dan burbank 1 | DRankin 5 | Iowafun 1 | JasonR 1 | kwschumm 9 | Peters 4 |




Most Viewed

+ John Deere 2210 Backhoe Review
+ John Deere vs Kubota Compact Tractors
+ John Deere 790 fuel shut-off solenoid failing???
+ John Deere low viscosity HY GARD
+ John Deere JD 4100 Wiring diagram
+ JD 790 or Kubota L3000DT
+ Should I buy a John Deere 4105???
+ John Deere 4300 turns over but won't start
+ John Deere 455 garden tractor
+ Oil Change for Diesel Tractor

Most Discussion

+ John Deere 4300 scuffing......
+ Possible Solution To The 4000
+ Dealer out to lunch
+ Just got my new JD 4410 - Prob
+ Hello Green, Goodbye Orange
+ Receiver hitch for iMatch
+ 4300 wheel bolt problems
+ 4000 Ten Series 50 hour break
+ Don't buy JD compact tractors.
+ Oil Change for Diesel Tractor

Newest Topics

+ Oil overflow from tube and Smoke
+ John Deere 4100 gear 3 point not workin
+ 2000 John Deer Gator 4 X2
+ Mini Excavator SY20C - Small Body with Big Power
+ John Deer 1070 starting problem
+ John Deere 990
+ Tractors R Us
+ john deere 4100 with 410 loader hydraulic problem
+ John Deere 2032R Buying advice
+ John Deere 2010 loss of hydraulics













Turbochargers for Tractors and Industrial Machines
Cab Glass for Tractors and Industrial Machines

Alternators for Tractors and Industrial Machines
Radiators for Tractors and Industrial Machines

Driveline Components for Tractors and Industrial Machines
Starter Motors for Tractors and Industrial Machines