Battery

B7100

New member

Equipment
B7100,B7100 with Backhoe and FEL, Goldoni Quad 20
Feb 11, 2010
422
2
0
Wales
Battey light stays on after engine is started....suggestions on the diagnosis path.
There are generic tests but it would may make it easier if we knew what tractor it was.
dave
 

Bulldog

Well-known member

Equipment
M 9000 DTC, L 3000 DT
Mar 30, 2010
5,440
78
48
Rocky Face, Georgia
If you have a battery load tester or a ohm meter you can test the battery with the engine running to see if the alt. is putting out. If you are not sure what the output range should be test the battery with the engine off and the with it running and see what the difference is.
 

dwmfiore

New member
Jan 8, 2011
3
0
0
durham ct
connections are all tight....I'll work on your suggestion. Now it doesn't even start. However, I can jump it/ starts/ runs for awhile and then dies.
 

rodburner

New member
Nov 21, 2010
36
0
0
oklahoma city
I suspect you have a bad alt or connection. If you have a charger available, give your battery a good charge first disconnected from the tractor. Like Bulldog says measure the battery voltage difference with a multi meter between running and not. I don’t know about the tractor world but in automotive you should have about 13.2 volts at the battery with the tractor not running and about 14.5-16 volts running. This will tell you if the alt is working but won’t tell you the amperage output. You could be putting out 14.7 volts and only 1 amp, that won’t keep the battery charged. If you have a friend at an auto repair facility he most likely will have an inductive amperage gauge. You simply lay this device on any battery cable and it will display the rate of charge/discharge in amps of the battery while running, it can also be used to check the amperage load from the starter while cranking. If you don’t have access to any meters or gauges you can remove the battery and alt from the tractor and take to most any large auto parts store and have them tested at no charge. If it turns out to be the alternator try to find a starter/alt shop in your area and have it repaired, much cheaper than have to replace through Kubota.