WJSchrock
New member
How do you test magnetic alternator on John Deere 4100 tractor.
WJSchrock
- Thread starter WJSchrock
- Start date
- Views: 437
smstonypoint
Super Member
- Joined
- Oct 13, 2009
- Messages
- 5,820
- Location
- SC (Upstate) & NC (Piedmont)
- Tractor
- NH TN 55, Kubota B2320 & RTV 900, Bad Boy Outlaw ZTR
You will increase your chances of getting an answer to your question if you post your question (with a descriptive title) in http://www.tractorbynet.com/forums/john-deere-owning-operating/.
Good luck.
Steve
deerseeker001
Elite Member
- Joined
- Jul 20, 2011
- Messages
- 4,150
- Location
- Central wisconsin
- Tractor
- International 2500a with Loader
Welcome from Wisconsin
pmsmechanic
Elite Member
- Joined
- Dec 6, 2013
- Messages
- 4,235
- Location
- Southern Alberta, Canada
- Tractor
- 4410 and F-935 John Deere, MF 245
I have no idea what a magnetic alternator is. You can test a normal alternator a volt meter. When the tractor is running at about mid throttle the volts should read about 13.8 - 14.2. Right after starting it can read up to 15 or so volts for a short time. If you don't have a volt meter then hold a metal screwdriver or similar to the rear bearing on the alternator. If the bearing is magnetized then the alternator is charging. More magnetizm equals higher volts.
