Solid State Voltage Regulator Adjustment

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R1830
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Solid State Voltage Regulator Adjustment

Post by R1830 »

Hi. After 6 years finally got my M37 Running and road ready.

When idling my voltmeter is showing high. I have a solid state voltage regulator. Is there an adjustment?
In Progress: 1952 M37CDN Teardown
Elwood
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Re: Solid State Voltage Regulator Adjustment

Post by Elwood »

What is the voltage?

Have you verified that the voltage in the instrument cluster gage is accurate by comparing with a known good multimeter?
“When a long train of abuses and usurpations, pursuing invariably the same Object evinces a design to reduce them under absolute Despotism, IT IS THEIR RIGHT, IT IS THEIR DUTY, TO THROW OFF SUCH GOVERNMENT...” -Declaration of Independence, 1776
R1830
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Re: Solid State Voltage Regulator Adjustment

Post by R1830 »

It was showing 34 volts on my crappy multi meter so quite high. I’m going to double check with a better meter tomorrow. Could hear the batteries getting hot though so I think the gauge is accurate.
In Progress: 1952 M37CDN Teardown
Elwood
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Re: Solid State Voltage Regulator Adjustment

Post by Elwood »

I should have also asked: original 24v system or converted to 12v?

Either way, 34v is high.

No way to adjust the solid state regulators that I know of.
“When a long train of abuses and usurpations, pursuing invariably the same Object evinces a design to reduce them under absolute Despotism, IT IS THEIR RIGHT, IT IS THEIR DUTY, TO THROW OFF SUCH GOVERNMENT...” -Declaration of Independence, 1776
R1830
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Re: Solid State Voltage Regulator Adjustment

Post by R1830 »

It’s original 24v but new harness and regulator. There is two adjustment screws it looks like inside the regulator.
In Progress: 1952 M37CDN Teardown
NAM VET
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Re: Solid State Voltage Regulator Adjustment

Post by NAM VET »

mine for my 100 amp system puts out about 26 volts as I recall. hal
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Re: Solid State Voltage Regulator Adjustment

Post by PoW »

The SS 25A regulators have never been known as reliable, or as reliable as the original mechanical ones.

It is good they are interchangeable.

A 24-Volt system should charge at 28-Volts.

PoW
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