John Deere 2140 Fuel Gauge now always full!

Deere342

Member
Location
Derbyshire
The fuel gauge on my John Deere 2140 has taken to reading full to the brim recently. Is this going to be a bad earth? Worn through wiring somewhere? Has always worked well until recently.
 

Mursal

Member
Disconnect sender, see if it goes down?
If so, the fault is in the sender, probably a worn wiper/pot.
If it stays up, you are correct the copper, in the wire has touched the tin work, wiggle the loom with a mate watching the gauge, you might see it going down.
 

Deere342

Member
Location
Derbyshire
Disconnect sender, see if it goes down?
If so, the fault is in the sender, probably a worn wiper/pot.
If it stays up, you are correct the copper, in the wire has touched the tin work, wiggle the loom with a mate watching the gauge, you might see it going down.
So float is floating on the diesel.
Took off live from circular connection on side of the tank (on lift pump, fuel filter side of tractor) turned on ignition and fuel gauge registered full.
Could not remove earth as had no pliers with me, it's on well!
 

Mursal

Member
So it sounds like the "live" wire is touching the steel bodywork ..........
Did you wiggle the loom?

And as a matter of interest is the temperature gauge is as it should be?
 

Deere342

Member
Location
Derbyshire
So it sounds like the "live" wire is touching the steel bodywork ..........
Did you wiggle the loom?

And as a matter of interest is the temperature gauge is as it should be?
Yes wiggled the loom a bit where I could. Temperature guage moves usually stays on cool though never had get hot on gauge.
 

Mursal

Member
Definitely sounds as though the sender wire from the tank to the gauge is touching earth, could be under the dash, roundy cab?

Some of the other lads might know of a known fault with the loom ............
 

Berny

Member
Mixed Farmer
Just seen this . Both fuel and temp gauges reading full on my 2650. Before the fuel gauge was jumpy but temp steady. Any pointers please... Voltage reference unit...does it have one and where might it be?
 

FG.

Member
Mixed Farmer
Location
North Wiltshire
One of my 2140's had the full, jumpy, full, jumpy gauge, which was knackered sender track.
In your case, I'd have bonnet off, remove big plug from front of cab, locate which pin is fuel sender and test for continuity.
If there is, there's a short between pin and sender.
If not, under dash cowl is a minefield of loose wires and metal........
Another issue is cracking of the solder tracks around the 2 dash connection plugs
 

n e d

Member
Livestock Farmer
Hello 3350 started doing the same fuel gauge real jumpy when driving an when u turn ignition off it won't go down. Tried the wires from the bottom tank on another sender unit an when the ignition is off it still won't go to zero any suggestions
 

JD2140.si

Member
Mixed Farmer
hi,
I follow up this thread.
as a recently owner of a 2140 '82model I have problems with the temp gauge.
during restoration I refurbished the print plates on the dash by a specialist so that is all cleaned.
Now my temp gauge goes from nothing to full with a minimum of temp change. I thought the sensor would be broken, bought a new one, same problem. Maybe a bad replacement so got a 3th one but still the same. I ran the wiring sensor to first connector, ok. connector to main connector at the cabin, ok. Main connector to dash connector, ok. and dash connector to gauge, ok.
so wiring seems to be fine.
Then I connected the new temp sensor straight to the dash and heated it by hand, resulting in the Gauge shooting up again to max, but dropping after a few seconds as the sensor turns cold again.
Am i right to assume that the gauge has gone bad ? replacement of this little barsteward starts at 183euro .
 
Tags
fuel

SFI - What % were you taking out of production?

  • 0 %

    Votes: 77 43.3%
  • Up to 25%

    Votes: 62 34.8%
  • 25-50%

    Votes: 29 16.3%
  • 50-75%

    Votes: 3 1.7%
  • 75-100%

    Votes: 3 1.7%
  • 100% I’ve had enough of farming!

    Votes: 4 2.2%

Red Tractor drops launch of green farming scheme amid anger from farmers

  • 1,286
  • 1
As reported in Independent


quote: “Red Tractor has confirmed it is dropping plans to launch its green farming assurance standard in April“

read the TFF thread here: https://thefarmingforum.co.uk/index.php?threads/gfc-was-to-go-ahead-now-not-going-ahead.405234/
Top