John Deere 345 Battery Acid (Help)

   / John Deere 345 Battery Acid (Help) #1  

Secretec

Member
Joined
Jul 6, 2003
Messages
39
Location
Moorefield, West Virginia
Tractor
Kubota BX2660
My friend has a 345 (very well maintained). Everytime he mows grass or runs the tractor at higher RPM for a while, the battery boils acid out the top. /forums/images/graemlins/shocked.gif It blew the top completely off one battery. JD people are not sure what it is or what to do /forums/images/graemlins/mad.gif, anyone else had this problem or can help. Thanks in advance.
 
   / John Deere 345 Battery Acid (Help) #2  
Sounds like it is being seriously overcharged. If there is a regulator, it should be checked. If it is a shunt regulator, it may be open or disconnected.

Put a voltmeter across the battery terminals with the engine running at cutting speed. A fully charged battery should read around 14.0 - 14.4 volts. Anything more than 14.8 volts should be viewed with suspicion. If it is up near 16 volts or higher, it is almost certainly a failed regulator or burned out always-on headlights.

If there is no regulator and the headlights are not of the always-on variety, turning them on may help.
 
   / John Deere 345 Battery Acid (Help)
  • Thread Starter
#3  
He is on the second regulator now. We will check the voltage though. Thanks
 
   / John Deere 345 Battery Acid (Help) #4  
<font color="blue">He is on the second regulator now. </font>

If it is a shunt regulator, it could be a wiring problem. Shunt regulators work by consuming excess alternator/generator output. They don't actually control the alternator/generator itself. If they fail or aren't connected properly, you will get full unregulated output.
 

Tractor & Equipment Auctions

2012 FORD F-650 (A50854)
2012 FORD F-650...
David Bradley Manure Spreader (A50515)
David Bradley...
2015 CATERPILLAR AP1055F ASPHALT PAVER (A51242)
2015 CATERPILLAR...
2013 FOREST RIVER WILDWOOD BUMPER PULL CAMPER (A50854)
2013 FOREST RIVER...
2013 VOLVO VNL860 TANDEM AXLE SLEEPER (A51219)
2013 VOLVO VNL860...
2018 FREIGHTLINER CASCADIA (A50854)
2018 FREIGHTLINER...
 
Top