SA Coil resistor

Farmall Super A, AV, 1939 - 1954

Moderator: Team Cub

Forum rules
Notice: For sale and wanted posts are not allowed in this forum. Please use our free classifieds or one of our site sponsors for your tractor and parts needs.

SA Coil resistor

Postby Dale Finch » Tue Aug 09, 2011 11:46 pm

I just installed my new Brillman wiring harness (VERY NICE!) on my SA which had been converted to 12v. I must have told them something wrong, because as I was hooking it up, I realized that I didn't have the wiring for the almost forgotten coil resistor. I actually thought it belonged to the parts SA until today when I went through the photos and realized it was on this tractor.

Image

So my question is, is there a coil made that does NOT have the external resistor? Is it rediculously expensive? I just hate to add/delete wires from a brand new wiring harness. Anyone want to trade?

Thanks, Dale F
Dale Finch
User avatar
Dale Finch
501 Club
501 Club
 
Posts: 1327
Joined: Tue Apr 27, 2010 11:34 am
Location: NC, Chapel Hill
Zip Code: 27517
Tractors Owned: '52 Cub "Bobbie"
'55 Cub "Bertha"
'55 Cub "Ben"
'48 Super A "Bubba"
Circle of Safety Award
Circle of Safety: Y

Re: SA Coil resistor

Postby Former Member » Wed Aug 10, 2011 1:55 am

Dale, the way i understand it, the points and condensor need the reduction in voltage to prevent overheating and thus early failure.

you will just be adding the one small jumper in your pic.

Dale
Former Member
501 Club
501 Club
 
Posts: 6416
Joined: Tue Jan 29, 2008 10:56 pm
Zip Code: 00000
Circle of Safety Award
Circle of Safety: Y

Re: SA Coil resistor

Postby Gary Dotson » Wed Aug 10, 2011 6:07 am

Dale, to avoid tampering with your shiny new harness, just connect your resister in series between the coil & the dist. It doesn't care which side it's connected to.
Gary Dotson
Team Cub Mentor
Team Cub Mentor
 
Posts: 2514
Joined: Thu Aug 03, 2006 6:20 am
Location: OH West Mansfield
Zip Code: 43358
Tractors Owned: 48 Cub Diesel (Cubota)
53 Cockshutt 20 restored (Shooter)
52 Cockshutt 20 unrestored
47 Leader "B" (Herckie)
49 Leader "D" (Princess)
49 Leader "D" very rough
48 Leader "D" unrestored
Kubota B6200E
Kubota B6200HST
Kubota B8200HST-D
Circle of Safety Award
Circle of Safety: Y

Re: SA Coil resistor

Postby Don McCombs » Wed Aug 10, 2011 8:32 am

To answer your original question, an internal resistor 12V coil is available at NAPA for a little over $20. The number is IC14SB.
Don McCombs
MD, Deep Creek Lake

"1950 Something" Farmall Cub
1977 International Cub w/FH
1978 International Cub
1948 Farmall Super A
1951 Farmall Super C w/FH
User avatar
Don McCombs
Team Cub Mentor
Team Cub Mentor
 
Posts: 10365
Joined: Mon Feb 03, 2003 6:45 am
Location: MD, Deep Creek Lake
Zip Code: 21550
Tractors Owned: "1950 Something" Farmall Cub
1977 International Cub w/FH
1978 International Cub
1948 Farmall Super A
1951 Farmall Super C w/FH
Circle of Safety Award
Circle of Safety: Y

Re: SA Coil resistor

Postby Dale Finch » Wed Aug 10, 2011 9:19 am

A bit of clarification: In the photo above, one wire went to the coil (rear/left wire), and the other (forward/right) wire went around the front to the alternator on the left side.
Gary Dotson wrote:Dale, to avoid tampering with your shiny new harness, just connect your resister in series between the coil & the dist. It doesn't care which side it's connected to.

So where exactly do the 2 resistor wires go? In the photo the wire on the other coil terminal already goes to the distributor.

Dale F

PS The $20 NAPA coil may be the easiest solution...what's another $20 when I have spent 3x the value of the tractor on parts already!!! I just laugh when someone asks if I am doing this to sell it! !
Dale Finch
User avatar
Dale Finch
501 Club
501 Club
 
Posts: 1327
Joined: Tue Apr 27, 2010 11:34 am
Location: NC, Chapel Hill
Zip Code: 27517
Tractors Owned: '52 Cub "Bobbie"
'55 Cub "Bertha"
'55 Cub "Ben"
'48 Super A "Bubba"
Circle of Safety Award
Circle of Safety: Y

Re: SA Coil resistor

Postby John *.?-!.* cub owner » Wed Aug 10, 2011 9:41 am

The resister is normally between the switch and the coil. in your instance, the same switch also provides power to the exciter, so they connected it at the alternator exciter connection rather than running 2 wires from the switch.
"The Constitution is not an instrument for the government
to restrain the people, it is an instrument for the people to restrain the
government lest it come to dominate our lives and interests." Patrick Henry
User avatar
John *.?-!.* cub owner
Team Cub Guide
Team Cub Guide
 
Posts: 19093
Joined: Sun Feb 02, 2003 2:09 pm
Location: Mo, Potosi
Zip Code: 63664
Tractors Owned: 47, 48, 49 cub plus Wagner loader & other attachments. 41 Farmall H.

Re: SA Coil resistor

Postby Dale Finch » Wed Aug 10, 2011 9:53 am

Hmmmm...I should be able to figure this out, and maybe if I am standing there looking at the harness I will. I do know how to read a wiring diagram, but they did not send one with the harness...only numbered terminals with directions for where to connect them. I think I will draw a diagram, then perhaps I can figure it out.

So ultimately the goal is what? IF I have the rest of the tractor wired per Brillman's instructions, can I simply put this in series between the coil and distributor, as in between the left/rear coil wire and the dist? I will see just what wire is attached now to the OTHER coil terminal.

$20 is looking cheaper every question!

Dale F
Dale Finch
User avatar
Dale Finch
501 Club
501 Club
 
Posts: 1327
Joined: Tue Apr 27, 2010 11:34 am
Location: NC, Chapel Hill
Zip Code: 27517
Tractors Owned: '52 Cub "Bobbie"
'55 Cub "Bertha"
'55 Cub "Ben"
'48 Super A "Bubba"
Circle of Safety Award
Circle of Safety: Y

Re: SA Coil resistor

Postby artc » Thu Aug 11, 2011 10:51 am

i personally prefer the internal coil route. simpler and cleaner. the resisters get hot and can be a source of failure.
'If they're tappin', they're not burnin'
http://www.ZagrayFarmMuseum.org
User avatar
artc
Cub Pro
Cub Pro
 
Posts: 1738
Joined: Sun Mar 30, 2003 10:25 am
Location: CT, Middletown
Zip Code: 06457
eBay ID: cmtelephone
Tractors Owned: 1950 cubs (3), 1948 cub, 1941 A, 1948 H, 1963 B414, 1958 240U, 1947 Oliver 60 industrial, Oliver 70 industrial.1948 super AI (trailer queen), 1958 450.

Re: SA Coil resistor

Postby Dale Finch » Thu Aug 11, 2011 12:52 pm

Don McCombs wrote:To answer your original question, an internal resistor 12V coil is available at NAPA for a little over $20. The number is IC14SB.

Just spoke witht he NAPA guy, and one new resistorless-coil is on its way to the shop!!! Thanks once again for your advice and support! :big smile:

Dale F

PS Got the drawbar and rear rockshaft on so far today, plus some little piddling stuf!!
Dale Finch
User avatar
Dale Finch
501 Club
501 Club
 
Posts: 1327
Joined: Tue Apr 27, 2010 11:34 am
Location: NC, Chapel Hill
Zip Code: 27517
Tractors Owned: '52 Cub "Bobbie"
'55 Cub "Bertha"
'55 Cub "Ben"
'48 Super A "Bubba"
Circle of Safety Award
Circle of Safety: Y


Return to Farmall A, Super A, AV

Who is online

Users browsing this forum: No registered users and 2 guests