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kohler charging problem

Discussion in 'Mechanic and Repair' started by shop22, Sep 9, 2007.

  1. shop22

    shop22 LawnSite Member
    Messages: 134

    It's on a bobcat z that we have in the shop. spec is a 67531 for the motor. Checked ac at staor and got 28 even. checked at b+ on regulator with unit runnign ang got 13.5 or 6 but when checked at battery only get 12.7 or 8 and when clutch is engaged battery shows 12.3 or 4. I tried another regulator i had at the shop and identical readings. I did a continuity test from purple wire at b+ on regulator to positive of battery and there is continuity, with the key in the on position. Any thoughts? I know i should be in the mid 13's when no pto and high 12's when it's on.
  2. Bill Kapaun

    Bill Kapaun LawnSite Senior Member
    Messages: 963

    I would check the fuses.
    You state the Battery V decreases when you engage the PTO, but how about the V at the regulator? IF it stays the same, (PTO ON & OFF) I'd feel even more strongly that it's a fuse or open circuit in that wire.
    Without model#'s, I can't really look at the correct schematic.
  3. shop22

    shop22 LawnSite Member
    Messages: 134

    fuse is fine, I made sure of that. Voltage at the regulator went down to the high 12's from the mid 13's. I know its an older 60" bobcat but I don't have the model in front of me.
  4. Restrorob

    Restrorob LawnSite Fanatic
    Messages: 11,029

    With a good fully charged battery your charging system appears to be working properly.

    The PTO clutch could be drawing too many amps which is the reason for such a drop when engaged.

    Check the below post out about adjusting the clutch;

  5. shop22

    shop22 LawnSite Member
    Messages: 134

    model is 942202 serial 942202209. I figured the system seemed to be working just not giving me the total i normally see. I was gonna check the clutch on monday cause I got the unit late saturday.
  6. fixer67

    fixer67 LawnSite Silver Member
    Messages: 2,098

    Now this is odd. I had this same problem today on a Walker with a Kohler. The problem was in the grounding. Put your NEG test meter lead on the regulator case. Then the POS meter lead on the POS battery post. If you get the voltage you did at the POS terminal at the regulator then take the NEG meter lead and put it on the NEG battery post. If the voltage drops then the ground is the problem.

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