The Jalopy Journal

flypa38 · 10-09-2012, 08:27 PM

Building up a spare generator for my '56 Pontiac and got a new armature. I put everything together and tried to put the pulley nut on, but it wouldn't start! Figured out it has reverse threads! Everything else is exactly the same as the other armatures. Anyone know where to find a reverse thread nut for this thing?

Johnny

Engine man · 10-09-2012, 08:33 PM

Fastenal
|http://http://www.fastenal.com/web/s...tr02:^Steel$|~~

Commish · 10-10-2012, 01:50 AM

Quote:

Originally Posted by flypa38

Building up a spare generator for my '56 Pontiac and got a new armature. I put everything together and tried to put the pulley nut on, but it wouldn't start! Figured out it has reverse threads! Everything else is exactly the same as the other armatures. Anyone know where to find a reverse thread nut for this thing?

Johnny

Don't know where to prove whether this is right or not, but seems to me that a generator from an early corvair turned the opposite direction from normal. Might be an armature from one of those if my memory is correct. If you got the case also, it might not charge.

flypa38 · 10-10-2012, 09:02 AM

Oh yeah.....I remember hearing something about that.......
What gets me is that the part number that is stamped on it is correct, but the threads are backwards... I may be looking for a new armature instead.

belair · 10-10-2012, 09:47 AM

just turn the generator around. wait until you try to change a tire on a rainy night with left-handed studs.

flypa38 · 10-10-2012, 10:39 AM

Been there! You should have seen me trying to get the lugs off before I knew they were LH threads!

propwash · 10-10-2012, 11:30 AM

re: lugnuts....know your car(s)

**porknbeaner** · 10-10-2012, 11:34 AM

Quote:

Originally Posted by flypa38

Building up a spare generator for my '56 Pontiac and got a new armature. I put everything together and tried to put the pulley nut on, but it wouldn't start! Figured out it has reverse threads! Everything else is exactly the same as the other armatures. Anyone know where to find a reverse thread nut for this thing?

Johnny

Left hand thread nut any hardware store or a NAPA.

flypa38 · 10-10-2012, 10:17 PM

Dang! Really that easy? Figured it would at least be an odd size, thread count, or something!

**e1956v** · 10-11-2012, 05:59 PM

It is an odd thread size .665-20 I doubt NAPA will have it. Corvair generators did use a reverse thread nut, since the generator turned CCW. It was supposed to help the nut from comming loose. Try Clarks Corvair parts or the salvage yard. I may have some old ones some where in the shop, PM me if you want me to go a diggin.

ol55 · 10-20-2012, 09:40 PM

My buddy Dan says a corvair generator would also have the brush holders angled the wrong direction and the pulley fan blades would also be angled the other way. He suggests another generator if this is the case...

Larry

flypa38 · 10-21-2012, 09:25 AM

Hey fellas!
Thanks for looking.......in this case, ONLY the armature is (maybe)Corvair. The entire generator is '56 Pontiac, but some wires broke near the commutator on the original armature. I found an armature with the same part number rebuilt in a sealed box, and aside from the threads, it looked identical. Fan, case, field coils, brush holders, etc. all '56 Pontiac......but this oddball armature? Now I'm wondering if it will work together! Like I said earlier, I may just need to locate a new armature!
Thanks!
Johnny

P.S. Larry, I hope to get dimensions a little later today. Keep your eye out for a PM!

10-09-2012, 08:27 PM	#1
flypa38 Grenade Inspector Join Date: May 2005 Location: Virginia Beach, VA Posts: 346	Reverse thread Delco generator nut? Building up a spare generator for my '56 Pontiac and got a new armature. I put everything together and tried to put the pulley nut on, but it wouldn't start! Figured out it has reverse threads! Everything else is exactly the same as the other armatures. Anyone know where to find a reverse thread nut for this thing? Johnny

10-09-2012, 08:33 PM	#2
Engine man Senior Member Join Date: Jan 2011 Location: Wisconsin Posts: 1,479	Re: Reverse thread Delco generator nut? Fastenal \|http://http://www.fastenal.com/web/s...tr02:^Steel$\|~~ __________________ Anything dropped while working on a vehicle will roll underneath to the exact center.

10-10-2012, 09:02 AM	#4
flypa38 Grenade Inspector Join Date: May 2005 Location: Virginia Beach, VA Posts: 346	Re: Reverse thread Delco generator nut? Oh yeah.....I remember hearing something about that....... What gets me is that the part number that is stamped on it is correct, but the threads are backwards... I may be looking for a new armature instead.

10-10-2012, 09:47 AM	#5
belair Old School HAMBer Join Date: Jul 2006 Location: Brady TEXAS Posts: 4,253	Re: Reverse thread Delco generator nut? just turn the generator around. wait until you try to change a tire on a rainy night with left-handed studs. __________________ Every knee will bow H.A.M.B. Chapel 322 Naihead and complete stick set-up for sale

10-10-2012, 10:39 AM	#6
flypa38 Grenade Inspector Join Date: May 2005 Location: Virginia Beach, VA Posts: 346	Re: Reverse thread Delco generator nut? Been there! You should have seen me trying to get the lugs off before I knew they were LH threads!

10-10-2012, 11:30 AM	#7
propwash Old School HAMBer Join Date: Jul 2005 Location: Las Vegas Posts: 3,735	Re: Reverse thread Delco generator nut? re: lugnuts....know your car(s)

10-10-2012, 10:17 PM	#9
flypa38 Grenade Inspector Join Date: May 2005 Location: Virginia Beach, VA Posts: 346	Re: Reverse thread Delco generator nut? Dang! Really that easy? Figured it would at least be an odd size, thread count, or something!

10-11-2012, 05:59 PM	#10
e1956v Alliance Vendor Join Date: Sep 2009 Location: Colorado Springs Posts: 417	Re: Reverse thread Delco generator nut? It is an odd thread size .665-20 I doubt NAPA will have it. Corvair generators did use a reverse thread nut, since the generator turned CCW. It was supposed to help the nut from comming loose. Try Clarks Corvair parts or the salvage yard. I may have some old ones some where in the shop, PM me if you want me to go a diggin. __________________ www.speedoservice.com Shall I rush your rush job or the rush job I was rushing when you rushed in? Its 106 miles to Chicago, we got a full tank of gas, half a pack of cigarettes, its dark.... and we're wearing sunglasses

10-20-2012, 09:40 PM	#11
ol55 Grenade Inspector Join Date: Oct 2008 Location: Virginia Posts: 213	Re: Reverse thread Delco generator nut? My buddy Dan says a corvair generator would also have the brush holders angled the wrong direction and the pulley fan blades would also be angled the other way. He suggests another generator if this is the case... Larry

10-21-2012, 09:25 AM	#12
flypa38 Grenade Inspector Join Date: May 2005 Location: Virginia Beach, VA Posts: 346	Re: Reverse thread Delco generator nut? Hey fellas! Thanks for looking.......in this case, ONLY the armature is (maybe)Corvair. The entire generator is '56 Pontiac, but some wires broke near the commutator on the original armature. I found an armature with the same part number rebuilt in a sealed box, and aside from the threads, it looked identical. Fan, case, field coils, brush holders, etc. all '56 Pontiac......but this oddball armature? Now I'm wondering if it will work together! Like I said earlier, I may just need to locate a new armature! Thanks! Johnny P.S. Larry, I hope to get dimensions a little later today. Keep your eye out for a PM!

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