Results 1 to 4 of 4
  1. #1
    New Member
    Join Date
    Mar 2010

    Default b7100

    can someone tell me how to test if the dynamo is shot without taking it off,
    I live in Costa Rica and just recently traded in a kubota B7100 and apparently does not charge, the fan turns alright but it looks like a job to take it off, or is there an easier way than taking the front panel off>>

  2. #2
    Platinum Member
    Join Date
    Jun 2003
    Western Illinois
    2016 B2650 ROPS, 1998 B2400 (sold!)

    Default Re: b7100

    Take a voltage reading with tractor off. Start tractor and take a reading ( from battery) with tractor running at 1/2 throttle. Running voltage should be 13.8-14.5 volts and static should be 12.5-12.8.

  3. #3
    Epic Contributor Egon's Avatar
    Join Date
    Aug 2001
    Nova Scotia, Canada

    Default Re: b7100

    Use an a meter to check the dynamo output. If it needs replacing pull the oil cooler and radiator. It's not difficult. The housing holding the dynamo will have one bolt that is difficult to access. Bend a wrench to fit or use a ratcheting wrench.

    There are threads here giving descriptions of doing this job.
    50 years behind the times
    Livin in a
    Worn out skin bag filled with rattlin bones

  4. #4
    Veteran Member brain55's Avatar
    Join Date
    Jan 2008
    Brentwood, CA

    Default Re: b7100

    The dynamo output should be at least 20 volts AC across the 2 wires with them unplugged and the tractor at full throttle. In over 20 years I have only seen 2 dynamo electrical failures, all other failures have been bearing failures. Most likely the voltage regulator is bad.


Similar Threads

  1. B7100 FEL or BH interchangeable with B6100 or others?
    By grossgary in forum Kubota Owning/Operating
    Replies: 10
    Last Post: 07-09-2009, 01:44 PM
  2. New B3200 and B7100 owner
    By imajeepnut in forum Kubota Owning/Operating
    Replies: 6
    Last Post: 03-18-2009, 07:19 PM
  3. B7100 or B6100, What's the difference?
    By ccdavis in forum Kubota Owning/Operating
    Replies: 1
    Last Post: 08-28-2007, 01:54 PM
  4. Analog Tach for B7100
    By RickNC in forum Kubota Owning/Operating
    Replies: 0
    Last Post: 07-30-2002, 01:41 PM
  5. What would you pay for a B7100??
    By Anonymous Poster in forum Kubota Buying/Pricing
    Replies: 5
    Last Post: 05-09-2002, 11:13 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
© 2018 TractorByNet is a registered trademark of IMC Digital Universe, Inc. Other trademarks on this page are the property of their respective owners.