The Ford Barn

2manycars · 08-24-2018, 06:58 PM

Is there a way to calibrate the volt guage on the 40 ford? Mine points to just between the yellow and red, while a meter says 6.5 volts.

JSeery · 08-24-2018, 07:37 PM

deleted, stupid answer!

koates · 08-24-2018, 07:48 PM

I would guess that your gauge is reading correctly in the yellow at 6.5 volts which is really only static battery voltage with engine not running. It should be in the green with engine running and revved up to 2000 RPM and generator will be charging at 7.2 to 7.5 volts. The generator will not be charging at engine idle speed. Regards, Kevin.

2manycars · 08-24-2018, 08:25 PM

Maybe I should have the generator checked. The guage reads between the red and yellow while at speed.

JSeery · 08-24-2018, 08:28 PM

Copied from Flat Ernie post on the HAMB:

EDIT: Found my service bulletin book. You should have the following colors from left to right - red, orange, green, red. (I guess the orange on mine is faded to yellow)

Top of first red range/bottom of orange range = 6.2V
Top of orange range/bottom of green range = 7.1V
Top of green range/bottom of second red range = 8.25V

2manycars · 08-25-2018, 06:46 AM

Sponsored Links (Register now to hide all advertisements)

Quote:

Originally Posted by JSeery

Copied from Flat Ernie post on the HAMB:

EDIT: Found my service bulletin book. You should have the following colors from left to right - red, orange, green, red. (I guess the orange on mine is faded to yellow)

Top of first red range/bottom of orange range = 6.2V
Top of orange range/bottom of green range = 7.1V
Top of green range/bottom of second red range = 8.25V

Thank you. That is very helpful.

08-24-2018, 06:58 PM	#1
2manycars Senior Member Join Date: May 2010 Location: Eastern CT Posts: 2,732	40 ford volt guage Is there a way to calibrate the volt guage on the 40 ford? Mine points to just between the yellow and red, while a meter says 6.5 volts. __________________ Bill www.brauchauto.com

08-24-2018, 07:37 PM	#2
JSeery Member Emeritus Join Date: Nov 2012 Location: Wichita KS Posts: 16,132	Re: 40 ford volt guage deleted, stupid answer! Last edited by JSeery; 08-24-2018 at 07:57 PM.

08-24-2018, 07:48 PM	#3
koates Senior Member Join Date: May 2010 Location: Melbourne Australia. Posts: 2,079	Re: 40 ford volt guage I would guess that your gauge is reading correctly in the yellow at 6.5 volts which is really only static battery voltage with engine not running. It should be in the green with engine running and revved up to 2000 RPM and generator will be charging at 7.2 to 7.5 volts. The generator will not be charging at engine idle speed. Regards, Kevin.

08-24-2018, 08:25 PM	#4
2manycars Senior Member Join Date: May 2010 Location: Eastern CT Posts: 2,732	Re: 40 ford volt guage Maybe I should have the generator checked. The guage reads between the red and yellow while at speed. __________________ Bill www.brauchauto.com

08-24-2018, 08:28 PM	#5
JSeery Member Emeritus Join Date: Nov 2012 Location: Wichita KS Posts: 16,132	Re: 40 ford volt guage Copied from Flat Ernie post on the HAMB: EDIT: Found my service bulletin book. You should have the following colors from left to right - red, orange, green, red. (I guess the orange on mine is faded to yellow) Top of first red range/bottom of orange range = 6.2V Top of orange range/bottom of green range = 7.1V Top of green range/bottom of second red range = 8.25V