Transmission Calibration 2007 John Deere 3120

chickenman · Nov 16, 2010

Cocre said:
You probably had a throttle position sensor issue. I had a similar problem last year. I suspect what the dealer did was calibrate the sensor. The throttle position sensor calibration on a 3x20 series is a bit more complex than chickenman describes, but easy enough. I really suggest you buy the technical manual for your model. It cost a few bucks but is well worth the price.

what is the calibration procedure on your tractor?

Cocre · Nov 16, 2010

chickenman said:
it adds wear and tear on mine because there is no differential in the drive line between front and rear wheels so any tire wear puts a strain on the drive line also tight turns put a strain on it

I understand not using the MFWD under certain circumstances, but in most instances (for the type of work I do) I believe I strain my tractor less by using MFWD than by not using it. Sorta like walking around on two feet rather than hopping around on one. It is just a lot easier on two feet.

I guess it depends on how you use the tractor. I use the loader and backhoe 90% of the time, brush cut and till the other 10%. The loader works way better in MFWD, so much so that I just never take it out unless I hit the paved road.

OzGrasshopper · Nov 16, 2010

interesting comments re MFWD - 2 different uses so 2 different preferences in working. 95% of my hours are in rough/uneven paddocks either slashing or doing bucket work so i leave mine in MFWD & only disengage when on roadways. i find that in uneven terrain the 4 wd function gives a better ride as machine is pulling & pushing so to speak. Cocre i see urs is a 2006 model, what sort of hours have u done, likewise Chickenman, if its not an impolite question to u both? cheers OG

chickenman · Nov 16, 2010

OzGrasshopper said:
interesting comments re MFWD - 2 different uses so 2 different preferences in working. 95% of my hours are in rough/uneven paddocks either slashing or doing bucket work so i leave mine in MFWD & only disengage when on roadways. i find that in uneven terrain the 4 wd function gives a better ride as machine is pulling & pushing so to speak. Cocre i see urs is a 2006 model, what sort of hours have u done, likewise Chickenman, if its not an impolite question to u both? cheers OG

got mine in 04 and use it quite a bit but the hour meter display is shot so i'm not sure

i use mfwd quite a bit but try to avoid sharp turns with it and engage it and disengage while moving slowly but when just going to a work site i disengage it

i have a horse farm so it gets used much

i have been thinking of getting a regular hour meter to put on