What's this?

Farmall Cub Forum -- Questions and answers to all of your Cub related issues.

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.

What's this?

Postby kxt710 » Mon Mar 25, 2013 5:32 pm

Alright team cub spent the afternoon troubleshooting the electrical system On the backhoe cub - have no spark at all. Power to the starter but nothing to the plugs. I've attached a pic of something I have never seen before it's not on my 48 nor was it on my 51 or 55? Is not in my parts manual and not on any on line unless I've just missed it.

Thanks kt
Attachments
image.jpg
image.jpg (114.96 KiB) Viewed 856 times
image.jpg
image.jpg (114.36 KiB) Viewed 856 times
kxt710
Cub Star
Cub Star
 
Posts: 82
Joined: Fri Jun 12, 2009 8:37 pm
Location: brooksville fl
Zip Code: 34601
Tractors Owned: 1948 cub (Walli)
1957 lowboy with backhoe

Re: What's this?

Postby tmays » Mon Mar 25, 2013 5:35 pm

External resistor for the coil
Thomas
tmays
501 Club
501 Club
 
Posts: 1420
Joined: Wed May 11, 2011 8:59 pm
Location: Raymond, MS
Zip Code: 39154
Tractors Owned: 1972 Cub
1947 Cub
1952 Cub
152 plow
1953 Farmall Super C
154 Cub Loboy
44 LB Woods mower
23A disk
144 Cultivators
Poplarville disc
54A blade
Gaylott scoop
193 Moldboard plow
Cub 22 mower
Woods 42
IH C-2
174 Planter/Fertilizer
Rotary Hoe

Re: What's this?

Postby kxt710 » Mon Mar 25, 2013 5:53 pm

I know this is going to sound dumb but my electrical knowledge is limited. Why is it there? Is it necessary?
kxt710
Cub Star
Cub Star
 
Posts: 82
Joined: Fri Jun 12, 2009 8:37 pm
Location: brooksville fl
Zip Code: 34601
Tractors Owned: 1948 cub (Walli)
1957 lowboy with backhoe

Re: What's this?

Postby Eugene » Mon Mar 25, 2013 5:59 pm

Yup. Ballast or external resistor to the coil. Drops the voltage across the points to between 6 and 9 volts. Used when converting a 6 volt electrical system to 12 volts.

They do malfunction. Continuity check across both terminals. Continuity - usually good. No continuity - no good.
I have an excuse. CRS.
Eugene
Team Cub Mentor
Team Cub Mentor
 
Posts: 12122
Joined: Fri Jul 02, 2004 9:52 pm
Location: Mo. Linn
Zip Code: 65051
Circle of Safety Award
Circle of Safety: Y

Re: What's this?

Postby OneMule » Mon Mar 25, 2013 6:52 pm

I don't have a lot of experience with 12V conversions -- why would there be 2 ballast resistors on that system?
Roger
User avatar
OneMule
 
Posts: 17
Joined: Wed May 23, 2012 8:12 pm
Zip Code: 44864
Tractors Owned: 1948 Cub
1953 Super C
1974 140
Circle of Safety Award
Circle of Safety: Y

Re: What's this?

Postby dbboss » Mon Mar 25, 2013 7:02 pm

Mine did the same yesterday after I finished changing the oil & oil filter. Got to checking wires &to one was pulled off of the same thing you're showing in the pic. Plugged it back up & she fired right up. I didn't have any idea what it was either, but mine is mounted to the back of the alternator. Thanks for the post. At least now I know what it is, even though I knew I had to have it hooked up to run. Hopefully this simple fix will get yours going also.
dbboss
Cub Star
Cub Star
 
Posts: 95
Joined: Sat Mar 09, 2013 8:14 pm
Zip Code: 39338
eBay ID: dbboss
Tractors Owned: '63 Massey Ferguson 35 diesel deluxe
'50 Farmall Cub

Re: What's this?

Postby danovercash » Mon Mar 25, 2013 7:09 pm

If you have two maybe one is for 6V lights.
"It is impossible for a man to learn what he thinks he already knows." -Epictetus

252646 & 221525. 195897 (Gone but not forgotten!)
http://groups.yahoo.com/group/dansfarmallcub/
danovercash
501 Club
501 Club
 
Posts: 2819
Joined: Mon Feb 17, 2003 8:48 pm
Location: NC, Kannapolis
Zip Code: 28081
Circle of Safety Award
Circle of Safety: Y

Re: What's this?

Postby Eugene » Mon Mar 25, 2013 7:13 pm

kxt710 wrote:I know this is going to sound dumb but my electrical knowledge is limited. Why is it there? Is it necessary?
The points ignition systems are typically designed to operate in the 6 to 9 volt range - - even on 12 volt trucks and automobiles. To reduce the voltage across the points you can either use a 6 volt coil and the resistor (resistor is less expensive than next alternative) or purchase a 12 volt coil with internal resistor.
I have an excuse. CRS.
Eugene
Team Cub Mentor
Team Cub Mentor
 
Posts: 12122
Joined: Fri Jul 02, 2004 9:52 pm
Location: Mo. Linn
Zip Code: 65051
Circle of Safety Award
Circle of Safety: Y

Re: What's this?

Postby kxt710 » Mon Mar 25, 2013 8:15 pm

So if I reading correctly I could get a 12 volt coil and remove the external resistors? Just a question in case I find the coil bad - it got pretty hot when I was trying to crank it today..
kxt710
Cub Star
Cub Star
 
Posts: 82
Joined: Fri Jun 12, 2009 8:37 pm
Location: brooksville fl
Zip Code: 34601
Tractors Owned: 1948 cub (Walli)
1957 lowboy with backhoe

Re: What's this?

Postby Wakulla Bill » Mon Mar 25, 2013 8:46 pm

Kevin, You are correct just make sure the 12 volt coil has an internal resistor, as Eugene said.
Bill
"Work smarter; Not harder"
User avatar
Wakulla Bill
Cub Star!!
Cub Star!!
 
Posts: 358
Joined: Thu Jun 30, 2011 9:19 pm
Location: Crawfordville, Fla
Zip Code: 32327
Tractors Owned: Now
73 MF 165
63 MF 203 Ind
44 BF Avery "A" Project
51 Farmall Cub
49 Farmall Cub
48 Farmall Super A
Circle of Safety Award
Circle of Safety: Y

Re: What's this?

Postby Boss Hog » Mon Mar 25, 2013 9:08 pm

kxt710 wrote:So if I reading correctly I could get a 12 volt coil and remove the external resistors? Just a question in case I find the coil bad - it got pretty hot when I was trying to crank it today..



12 volt coil with internal resistor.
NAPA part # IC14SB
IN GOD WE TRUST
All others pay cash
Boss Hog
Power corrupts; absolute power corrupts absolutely byJohn Emerich Edward Dalberg

8th Va fest link viewtopic.php?f=8&t=81392&p=657790#p657790
User avatar
Boss Hog
Cub Pro
Cub Pro
 
Posts: 9652
Joined: Mon Oct 24, 2005 8:35 pm
Location: VA. Randolph
Zip Code: 23962
eBay ID: dmb2613
Circle of Safety Award
Circle of Safety: Y

Re: What's this?

Postby Buzzard Wing » Tue Mar 26, 2013 8:13 am

It's not well documented in the parts manual, or anywhere I looked. But definitely should be on a 12v Cub, otherwise the coil gets wicked hot..... It will run without it (for a pretty long period too). I put an internal resistor coil on my 65 Lo Boy, the original coil was the same as a 6v Cub.
1971 Cub (Rufus) 1950 Cub (Cathy) 1965 Lo Boy Fast Hitch (Nameless III) 1970 Cub 1000 Loader & Fast Hitch (Lee)
User avatar
Buzzard Wing
Cub Pro
Cub Pro
 
Posts: 9951
Joined: Mon Aug 09, 2004 10:14 pm
Location: RI, Newport
Zip Code: 02840

Re: What's this?

Postby thiggy » Tue Mar 26, 2013 10:36 am

Are we looking at two separate resistors in the photo?
Since retirement, the things I miss most are the holidays!
thiggy
Cub Star!!
Cub Star!!
 
Posts: 449
Joined: Thu May 19, 2005 2:04 pm
Location: Birmingham Al/Bay Springs Ms.
Zip Code: 35216
Tractors Owned: 1947 Cub
1949 Cub
2011 JD X320
Circle of Safety Award
Circle of Safety: Y

Re: What's this?

Postby Eugene » Tue Mar 26, 2013 11:15 am

thiggy wrote:Are we looking at two separate resistors in the photo?
Yes, two resistors. One on top is wired to the ignition coil. Bottom one is probably wired into the lighting circuit.

Search for car voltage reducer 12 V to 6 V. There are several different styles still available.

We frequently used voltage reducers when upgrading older vehicles or installing inexpensive, readily available 6 volt appliances on 12 volt vehicles. Last one was when brother up graded his 1953 Chev truck, used as a business advertisement. Wanted to maintain the original gauges and windshield wipers.
I have an excuse. CRS.
Eugene
Team Cub Mentor
Team Cub Mentor
 
Posts: 12122
Joined: Fri Jul 02, 2004 9:52 pm
Location: Mo. Linn
Zip Code: 65051
Circle of Safety Award
Circle of Safety: Y

Re: What's this?

Postby danovercash » Tue Mar 26, 2013 7:39 pm

Eugene, did his '53 Chevy truck have electric wipers? Mine had a vacuum motor. I put on a dual action fuel pump which regulated the vacuum. They worked as good as electrics as long as the motor was running. No more too slow or too fast wipers! I did have a '53 Bel-Air hardtop that I put a '57 electric motor in, and ran it and a tape player off a 12V battery in the trunk, rest of car was still 6V.
"It is impossible for a man to learn what he thinks he already knows." -Epictetus

252646 & 221525. 195897 (Gone but not forgotten!)
http://groups.yahoo.com/group/dansfarmallcub/
danovercash
501 Club
501 Club
 
Posts: 2819
Joined: Mon Feb 17, 2003 8:48 pm
Location: NC, Kannapolis
Zip Code: 28081
Circle of Safety Award
Circle of Safety: Y

Next

Return to Farmall Cub

Who is online

Users browsing this forum: grumpy, twotone and 5 guests