Speed warning brass pin removal? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

mahanian · 02-22-2012, 08:53 PM

Has anyone pulled one out before? If so, could you educate me on how to accomplish this? I don't want to damage it and I'm not sure how it installs, but it looks like it has a swagged washer? Any help is appreciated!

gcburdic · 02-23-2012, 12:35 PM

ttt

mahanian · 03-06-2012, 01:36 PM

ttt

**jaros44sr** · 03-06-2012, 03:13 PM

Yep, its swagged, with two isolater washers in between. You would have to cut the brass washer to remove it. Then build another washer and swagging tool with four jaws to make it oringinal....why does yours have to come off

mahanian · 03-08-2012, 12:17 PM

That's what I figured, the tin was cut by the PO to install a factory tach but he cut the hole too low so the tach doesn't look right so I wanted to start over with a different tin but it doesn't sound like that's an option if I want to use the brass pin for the speed warning.

**Classic Bowties** · 03-08-2012, 02:11 PM

Quote:

Originally Posted by jaros44sr

Yep, its swagged, with two isolater washers in between. You would have to cut the brass washer to remove it. Then build another washer and swagging tool with four jaws to make it oringinal....why does yours have to come off

That is your 12 volt feed

I thought that the brass pin on the rear tin was a grounding lug, I am no wiring specialist but I wouldn't try putting 12 volts to that lug. The 12 volt supply (orange wire) should go to the buzzer with the grounding source (white wire) coming from the rear pin to the other terminal of the buzzer. Mel

Quote:

Originally Posted by mahanian

That's what I figured, the tin was cut by the PO to install a factory tach but he cut the hole too low so the tach doesn't look right so I wanted to start over with a different tin but it doesn't sound like that's an option if I want to use the brass pin for the speed warning.

Didn't Wes send you another S/W rear tin, why not correctly punch/cut the factory OE rear S/W tin for a tach?

mahanian · 03-08-2012, 02:24 PM

Yep, Wes supplied me the other tin and I had him ship it directly to Les to cut the hole for the tach. I started this thread before we worked out those details. Les finished it up today and shipped it to me. Wes has been great about this whole thing and I will definitely do more business with him in the future!

**Classic Bowties** · 03-09-2012, 11:27 PM

Quote:

Originally Posted by mahanian

Yep, Wes supplied me the other tin and I had him ship it directly to Les to cut the hole for the tach. I started this thread before we worked out those details. Les finished it up today and shipped it to me. Wes has been great about this whole thing and I will definitely do more business with him in the future!

Glad it all worked out for you guys, did you catch the above part of my post about not puting 12 volts to the rear tin pin? Mel

**jaros44sr** · 03-09-2012, 11:42 PM

Mel, im sure your right about that pin, i was just passing on info. I got from someone with out confirming it or possibly misunderstood them.

Thanks for catching my miscue......

Why would GM isolate with plastic spacers if it is just a ground, dunno

**Classic Bowties** · 03-10-2012, 02:05 PM

Quote:

Originally Posted by jaros44sr

Mel, im sure your right about that pin, i was just passing on info. I got from someone with out confirming it or possibly misunderstood them.

Thanks for catching my miscue......

Why would GM isolate with plastic spacers if it is just a ground, dunno

Because the buzzer would constantly be going off if the pin was not isolated from the rest of the tin which is grounded through the printed circuit. Mel

I am slmost 100% sure that if 12 volts were added to that pin, the S/W head or atleast some of the contact parts of it would fry when the two needles came in line with with one another. I am thinking if you had 12V.to that rear pin and your S/W needle set @ 88, this old movie quote comes into mind: "If my calculations are correct, when this baby hits 88 miles per hour, you're gonna see some serious chit." Mel

**70shortfleet** · 03-10-2012, 04:05 PM

If you ever break one of the plastic screws that holds the speedo face on, do not replace it with a metal scew or the hole speedo head will be grounded and the buzzer will buzz continuosly

**jaros44sr** · 03-10-2012, 07:11 PM

Great info guys, and thank you for your help

Just found out why you cant adjust the needle below 21mph, the adjusting gear has no teeth cut in it below that area. A little 3in 1 oil on the gears and it operates much smoother

into69z · 03-10-2012, 08:02 PM

Quote:

Originally Posted by 70shortfleet

If you ever break one of the plastic screws that holds the speedo face on, do not replace it with a metal scew or the hole speedo head will be grounded and the buzzer will buzz continuosly

Thanks-I always wondered why the gauge has plastic screws

mahanian · 03-10-2012, 11:43 PM

Quote:

Originally Posted by 70shortfleet

If you ever break one of the plastic screws that holds the speedo face on, do not replace it with a metal scew or the hole speedo head will be grounded and the buzzer will buzz continuosly

I bought 1000 of those nylon screws a long time ago to replace some that the heads sheared off so if anyone needs any I'll send you some if you cover the envelope and postage

02-22-2012, 08:53 PM	#1
mahanian C10 addict Join Date: Apr 2006 Location: Arizona Posts: 2,432	Speed warning brass pin removal? Has anyone pulled one out before? If so, could you educate me on how to accomplish this? I don't want to damage it and I'm not sure how it installs, but it looks like it has a swagged washer? Any help is appreciated! __________________ Jared 67 C10 CST Short Fleet Big Window 65 C10 Custom Short Fleet Big Window 67 Camaro RS

02-23-2012, 12:35 PM	#2
gcburdic Restoration Virgin! Join Date: Jan 2008 Location: Huntersville, NC Posts: 8,298	Re: Speed warning brass pin removal? ttt __________________ Geoff with a G 1968 Chevy C10 SWB The Mistress 1972 Custom Deluxe C20 Suburban A Suburban Named Isabella 1966 Ford Mustang Mama's High School Graduation Present

03-06-2012, 01:36 PM	#3
mahanian C10 addict Join Date: Apr 2006 Location: Arizona Posts: 2,432	Re: Speed warning brass pin removal? ttt

03-06-2012, 03:13 PM	#4
jaros44sr Senior Member Join Date: May 2006 Location: Philadelphia, Pa. 19454 Posts: 9,761	Re: Speed warning brass pin removal? Yep, its swagged, with two isolater washers in between. You would have to cut the brass washer to remove it. Then build another washer and swagging tool with four jaws to make it oringinal....why does yours have to come off __________________ Semper Fi...Uncle Sam, you da man All parts offered to help are free, unless otherwise noted Dont try this stuff in my build thread, unless you have 55 years of mechanical OTJ training SAFETY FIRST AS usual, off topic They say your mind goes second, can't remember the first Jim Last edited by jaros44sr; 03-09-2012 at 11:42 PM.

03-08-2012, 12:17 PM	#5
mahanian C10 addict Join Date: Apr 2006 Location: Arizona Posts: 2,432	Re: Speed warning brass pin removal? That's what I figured, the tin was cut by the PO to install a factory tach but he cut the hole too low so the tach doesn't look right so I wanted to start over with a different tin but it doesn't sound like that's an option if I want to use the brass pin for the speed warning. __________________ Jared 67 C10 CST Short Fleet Big Window 65 C10 Custom Short Fleet Big Window 67 Camaro RS

03-08-2012, 02:24 PM	#7
mahanian C10 addict Join Date: Apr 2006 Location: Arizona Posts: 2,432	Re: Speed warning brass pin removal? Yep, Wes supplied me the other tin and I had him ship it directly to Les to cut the hole for the tach. I started this thread before we worked out those details. Les finished it up today and shipped it to me. Wes has been great about this whole thing and I will definitely do more business with him in the future! __________________ Jared 67 C10 CST Short Fleet Big Window 65 C10 Custom Short Fleet Big Window 67 Camaro RS

03-09-2012, 11:42 PM	#9
jaros44sr Senior Member Join Date: May 2006 Location: Philadelphia, Pa. 19454 Posts: 9,761	Re: Speed warning brass pin removal? Mel, im sure your right about that pin, i was just passing on info. I got from someone with out confirming it or possibly misunderstood them. Thanks for catching my miscue...... Why would GM isolate with plastic spacers if it is just a ground, dunno __________________ Semper Fi...Uncle Sam, you da man All parts offered to help are free, unless otherwise noted Dont try this stuff in my build thread, unless you have 55 years of mechanical OTJ training SAFETY FIRST AS usual, off topic They say your mind goes second, can't remember the first Jim Last edited by jaros44sr; 03-10-2012 at 01:02 AM.

03-10-2012, 04:05 PM	#11
70shortfleet Senior Member Join Date: Apr 2010 Location: St.Peters, MO Posts: 2,239	Re: Speed warning brass pin removal? If you ever break one of the plastic screws that holds the speedo face on, do not replace it with a metal scew or the hole speedo head will be grounded and the buzzer will buzz continuosly

03-10-2012, 07:11 PM	#12
jaros44sr Senior Member Join Date: May 2006 Location: Philadelphia, Pa. 19454 Posts: 9,761	Re: Speed warning brass pin removal? Great info guys, and thank you for your help Just found out why you cant adjust the needle below 21mph, the adjusting gear has no teeth cut in it below that area. A little 3in 1 oil on the gears and it operates much smoother __________________ Semper Fi...Uncle Sam, you da man All parts offered to help are free, unless otherwise noted Dont try this stuff in my build thread, unless you have 55 years of mechanical OTJ training SAFETY FIRST AS usual, off topic They say your mind goes second, can't remember the first Jim Last edited by jaros44sr; 03-10-2012 at 07:17 PM.



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