The Stovebolt.com Forums Home | FAQ | Forum | Swap Meet | Gallery | Tech Tips | Events | Features | Search | Hoo-Ya Shop
Helping out ...


WELCOME

The site has expanded to include the 1973 to 1987 trucks!

Check out the new forum just for them and welcome our newest brothers and sisters with the "Rounded Line" trucks.
Encourage one another! Share what you've learned!

Stovebolt Site Search
 
Old Truck Calendars
Months of truck photos!
Nothing like an old truck calendar

Stovebolt Calendars

Check for details!


Who's Online Now
21 members (ChimChim123, 66rollback, dougs, D B Cooper, 2ManyTrucks, billinwisconsin, 1 invisible), 150 guests, and 3 robots.
Key: Admin, Global Mod, Mod
Forum Statistics
Forums58
Topics122,583
Posts988,946
Members44,491
Most Online1,229
Jan 21st, 2020
Image Posting Policy
Previous Thread
Next Thread
Print Thread
Page 1 of 2 1 2
Gauge grounding
#1400119 Fri Mar 05 2021 05:37 PM
Joined: Dec 2019
Posts: 137
3
37 GC Offline OP
'Bolter
The back of my ‘37 fuel gauge and it’s housing. I know there is a fiber plate across the back to insulate the terminals when bolting the gauge into the housing but I don’t remember nor do I find remnants of any insulation between the housing and actual gauge. Is this brass area on the back of the gauge meant to ground or should I fabricate a thin insulator? If it’s supposed to ground would a touch of dielectric grease be recommended?

Attached Files

Larry
All you need in life is TIME, PATIENCE and MONEY.
If you are missing one component, you'll need an abundance of the others two.
Re: Gauge grounding
37 GC #1400134 Fri Mar 05 2021 08:26 PM
Joined: Apr 2007
Posts: 850
L
'Bolter
No grounding here, unless you want smoke!
Here is a picture of the back of an NOS ammeter for the '37. There is an insulator board that protects the back of the gauge from the gauge housing and under the one nut you see a fiber washer to insulate the nut that attaches the gauge to the housing.
Kent

Attached Files
rsz_img_2425.jpg (46.6 KB, 101 downloads)

1937 Chevy 1/2 ton
1942 Chevy 1/2 ton
1947 Diamond T Model 509
1951 Chevy 1/2 ton
1950 Chevy COE Model 5700 ~ "Barney" ~ And more pix
Re: Gauge grounding
Lightholder's Dad #1400137 Fri Mar 05 2021 08:55 PM
Joined: Feb 2019
Posts: 1,620
P
AD Addict
Originally Posted by Lightholder's Dad
No grounding here, unless you want smoke!
Kent, he is talking about a gas gauge and not an ammeter. Yes, the gas gauge gets grounded to the gauge cluster. Clean the contact areas both on the gauge and the area on the cluster where the gauge touches. A little dielectric grease couldn’t hurt.

Last edited by Phak1; Sat Mar 06 2021 01:08 PM. Reason: Fix typo

Phil

1952 Chevrolet 3100
Project Journals
‘59 235 & hydraulic lifters
“Three on the Tree” & 4:11 torque tube
12v w/ Alternator
Re: Gauge grounding
37 GC #1400139 Fri Mar 05 2021 09:07 PM
Joined: Apr 2008
Posts: 816
F
'Bolter
It's amazing that Kent would actually have a picture of an NOS gauge. This site never ceases to impress me. Bolters always go the extra mile to help!!


Ed
Re: Gauge grounding
37 GC #1400159 Fri Mar 05 2021 10:57 PM
Joined: Apr 2007
Posts: 850
L
'Bolter
Oops, that is what happens when you don't read the question carefully. Sorry! Yes, the gas gauge should be grounded to the housing. Also, be sure you don't mix up which terminal goes to ignition, and which to the tank. Off hand, I don't remember which is which.

Last edited by Lightholder's Dad; Fri Mar 05 2021 10:57 PM.

1937 Chevy 1/2 ton
1942 Chevy 1/2 ton
1947 Diamond T Model 509
1951 Chevy 1/2 ton
1950 Chevy COE Model 5700 ~ "Barney" ~ And more pix
Re: Gauge grounding
37 GC #1400172 Fri Mar 05 2021 11:46 PM
Joined: Dec 2019
Posts: 137
3
37 GC Offline OP
'Bolter
thanks guys, Kent I'll have to figure out the correct terminals when I start rewiring The original wiring harness that remained in the truck was mostly bare copper with a turning to dust fabric which was all disconnected and bypassed with only essential wires to only allow the engine to run for farm work. Fun ahead. Phil thanks, it made sense that this brass surface was purposeful, but you did or did not recomend the dielectric grease? "could hurt"? or a typo?


Larry
All you need in life is TIME, PATIENCE and MONEY.
If you are missing one component, you'll need an abundance of the others two.
Re: Gauge grounding
37 GC #1400222 Sat Mar 06 2021 01:07 PM
Joined: Feb 2019
Posts: 1,620
P
AD Addict
Sorry, Typo! I fixed my post so I didn’t confuse the issue.


Phil

1952 Chevrolet 3100
Project Journals
‘59 235 & hydraulic lifters
“Three on the Tree” & 4:11 torque tube
12v w/ Alternator
Re: Gauge grounding
37 GC #1400225 Sat Mar 06 2021 01:44 PM
Joined: Feb 2019
Posts: 1,620
P
AD Addict
Looking from the back of the gauge, power should flow from the ignition switch, to right terminal (empty side), then from left terminal (full side) to the sending unit in tank. Normally there is a red tag attached to the terminal that goes to the sending unit, warning you not to apply power to that terminal or you will destroy the gauge.

Last edited by Phak1; Sat Mar 06 2021 11:02 PM.

Phil

1952 Chevrolet 3100
Project Journals
‘59 235 & hydraulic lifters
“Three on the Tree” & 4:11 torque tube
12v w/ Alternator
Re: Gauge grounding
37 GC #1400281 Sat Mar 06 2021 09:22 PM
Joined: Apr 2007
Posts: 850
L
'Bolter
Phil,
I agree with you except from the BACK of the gauge empty is on the right and full is on the left.

Something I just noticed on a couple of core gauges I have for my '37 is that the two terminals are not the same size. The one on the right is smaller (don't know the screw size) but the nut takes a 11/32 wrench. The terminal on the left is a larger diameter and the nut takes a 3/8 wrench. These gauges have (or had) a paper punched with two holes for the terminals. The smaller hole is labeled IGN and the larger hole TANK, which would be for the sender wire. I took a close up photo of these parts disassembled. I think it is fair to say the power goes to the right (empty) side. Please correct me if wrong, I don't want Larry to fry his sender or gauge if this is wrong.
Kent

Attached Files
rsz_img_2428.jpg (51.7 KB, 43 downloads)

1937 Chevy 1/2 ton
1942 Chevy 1/2 ton
1947 Diamond T Model 509
1951 Chevy 1/2 ton
1950 Chevy COE Model 5700 ~ "Barney" ~ And more pix
Re: Gauge grounding
Lightholder's Dad #1400289 Sat Mar 06 2021 11:07 PM
Joined: Feb 2019
Posts: 1,620
P
AD Addict
Originally Posted by Lightholder's Dad
Phil,
I agree with you except from the BACK of the gauge empty is on the right

You are absolutely correct and thanks for watching my back. I corrected my post so it is not correct.


Phil

1952 Chevrolet 3100
Project Journals
‘59 235 & hydraulic lifters
“Three on the Tree” & 4:11 torque tube
12v w/ Alternator
Page 1 of 2 1 2

Moderated by  Rusty Rod 

Link Copied to Clipboard
Home | FAQ | Forum | Swap Meet | Gallery | Tech Tips | Events | Features | Search | Hoo-Ya Shop
Powered by UBB.threads™ PHP Forum Software 7.7.4