Alternator/Voltage Regulator question

13 years ago

Hi Folks,

Briggs 44P700, 26 HP. The battery charging voltage and thereby everything else is intermittent. I replaced the battery as it was "07" as part of the troubleshooting/isolation process. No change.

It either works fine, or I'll be mowing and notice the ammeter is deflected in the discharge direction. That tells me that only the battery is keeping the blade solenoid energized and either the alternor or the voltage regulator have stopped working. Everything was disconnected and reconnected. I'm leaning to replacing the voltage regulator as it has solid state parts and would be more likely to become intermittent or fail than the alternator which is just copper.

Terminal voltage on the battery is about 12.3, when the tractor is running it's about 13.4-when things are working OK.

Opinions?

Thanks for your time,

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Comments (6)

mownie
13 years ago
Everything was disconnected and reconnected?
Including the mounting screw for the regulator"? (serves as a ground).
exmar zone 7, SE Ohio
Original Author
13 years ago
Mownie, you got me on that one!! :-) I didn't do that, will tomorrow.

Ev
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rcbe
13 years ago
Exmar - anybody been hosing or power washing on that tractor?
exmar zone 7, SE Ohio
Original Author
13 years ago
Rcbe, nope, no water and it's stored in the barn.

Ev
exmar zone 7, SE Ohio
Original Author
13 years ago
OK, loosened and retightened the mounting bolts for the VR, no change. Remembered I had a VR which had been replaced on another engine as it was "spiking" the meter. Put that one on and other than "spiking" over half throttle, everything worked fine, deeck solenoid engaged and didn't deflect to discharge.

Just ordered a replacement, Briggs 691185 VR from Amazon, be here Wed. $29.95, no shipping, no tax, gotta love Amazon-while it lasts, anyway.

Thanks for the responses,

Be well,

Ev
exmar zone 7, SE Ohio
Original Author
13 years ago
VR arrived and installed. Mowed about two acres, all is well.

Thanks for the responses.

Ev