Big_Lug
Silver Member
MY BROTHERS 790'S FUEL GAUGE IS NOT WORKING. CAN SOMEONE CHIM IN ON HOW TO FIX IT?
790 FUEL GAUGE NOT WORKING
- Thread starter Big_Lug
- Start date
- Views: 15996
fuseboxer
Silver Member
- Joined
- May 4, 2011
- Messages
- 214
- Location
- Gaines, Michigan
- Tractor
- two john deere Sabres (2554-Scotts) and 4410 john deere ,Allis Chalmers WD , 5' Cub Cadet Zero turn
Your JD shop manual should have good proceedures to follow to narrow down the problem. You may want to start by removing the fuel cap and peering inside to see if the float arm has come loose? The side of the tank should have a variable resistor, reostat electric sender unit that moves with the arm/float going up and down. I believe if you unplug the electric plug on the tank sender and put a volt/ohm on resistance when you gently push the float/arm down the meter should change resistance reading if the sender is good. Change the volt/ohm to DC about 100v and check to see if you have current/volts on the elec plug before you plug it back into the sender unit, when you turn the engine on. Did you check fuses? Any other electric problems? The shop manual has a step by step instructions and is worth ownership. ---Fuse
Willl
Elite Member
Ken
Veteran Member
I have a 4520 and fuel guage is always saying low fuel. Can shut off and restart proper level. But first terrace or level change it is low fuel so now just have a paint mixer stick for 5 gal. bucket and have marked where 5 gal. is on stick . If below the 5 gal. mark can add .
3 times it was checked under warrenty now want to replace unit with no promise it will work so went to the stick method.
After a century of making fuel level units looks like some one could design one that works.
ken
3 times it was checked under warrenty now want to replace unit with no promise it will work so went to the stick method.
After a century of making fuel level units looks like some one could design one that works.
ken
ppittman
New member
i have had dozens of these tractor.. its a easy fix every time... take a rubber hammer and tap the top left of the case where the gagues are. the fuel neede is just stuck
ppittman
New member
790, 3005, 990 4005, 1070 they are all the same. it took a temper tantrum to figure this out but thats all it takes to fix it
blasley
New member
My fuel and temp gauges don't work and neither do the warning lights on the dash. Its a 790 I just bought so I haven't had any time to troubleshoot it. The tachometer and the background lights work though.
dieselcrawler
Elite Member
My 3005 fuel gauge sticks at empty often... sometimes jumps up to current fuel level, other times will stay bottomed out all day. No rhyme or reason to it...