445 Battery Light On

   / 445 Battery Light On #21  
From TM1517:

On the 445

From the manual page number 5-184:

1st paragraph, 3rd and 4th sentence:
A discharge light (H3) warns the operator if the stator stops charging. The discharge light circuit monitors stator output, not battery voltage.


4th paragraph:
If the stator output current to the rectifier/regulator stops, the rectifier/regulator provides current to the discharge light (H3) to light the lamp.

Follow test procedures:
So check output voltage (AC voltage (minimum is 26 VAC) and current from stator!
Current output from regulator 13A
 
   / 445 Battery Light On
  • Thread Starter
#22  
Well this may be way out there, but I suppose it's possible that you are getting a lot of AC across the battery terminals from the alternator. Battery's don't like AC...
Richard

I have ordered a new VR to try. The AM126304 is $69.50 GFP online.
Stens aftermarket has # 435 180 for $26.99.
I will try one of these cheap deals.

I will check the voltage & DC current details before & after I replace the VR.
I know that diodes can fail & you get some AC voltage on the battery.
I'm not sure how a VR works. Maybe large zener diodes?
I think the input is ~ 26 VAC from the sensor.
So it has to convert this to DC, so it's can't be just a full wave bridge.
Thanks for mentioning this as a possibility.
It will be about a week before I get the new VR.
 
   / 445 Battery Light On
  • Thread Starter
#23  
I know this thread is old, but I need to post this info.
I did not mention here another symptom.
It was also fouling the left plug about every 4 hours.
1300+ hrs on the machine & at ~1000 hrs I replaced the rings.
So I expected the left piston was just worn too much. (It was not bored)
But after all this & replacing the V Regulator I got a surprise.
I have used the mower now for about 30 hours without fouling that plug.
So... whatever that semi/intermittently-bad VR was doing was fouling the plug.

I have 5 JD mowers now, including an almost new X540 and this 445 mower is still my favorite.
 

Tractor & Equipment Auctions

2023 Ford F-150 4x4 Ext. Cab Pickup Truck (A55852)
2023 Ford F-150...
2025 JMR Tree Boom Skid Steer Attachment (A53421)
2025 JMR Tree Boom...
UNUSED FUTURE XJ3T - 3 TON HYD THUMB CLAMP (A52706)
UNUSED FUTURE XJ3T...
2017 FREIGHTLINER M2 106 (A53843)
2017 FREIGHTLINER...
(INOP) NEW HOLLAND L328 WHEELED SKID STEER (A51242)
(INOP) NEW HOLLAND...
STORAGE FEES (A56138)
STORAGE FEES (A56138)
 
Top