8 volt replacement

Farmall 100, 1954 - 1973

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.

8 volt replacement

Postby dw » Wed May 20, 2009 2:29 pm

I rebuilt a super c and left it original 6 volt. I did alittle to the motor and now it is tight. The 6volt system really drains after a few turnovers. Can my regulator be adj. to put out more, or should i try to find a 8volt battery?
5+ Years
5+ Years
Posts: 38
Joined: Fri Dec 09, 2005 11:43 pm

Re: 8 volt replacement

Postby RaymondDurban » Wed May 20, 2009 2:32 pm

Clean all you connections, including where the starter mounts to the tractor, that will help alot. How old is the battery, and when was the last time it was on a good conditioning charge?
The 8V battery is not required if everything is good with the original 6V system.
User avatar
Team Cub Mentor
Team Cub Mentor
Posts: 4290
Joined: Wed Dec 26, 2007 7:45 pm
Location: FL, Crestview
Zip Code: 32536
Circle of Safety Award
Circle of Safety: Y

Re: 8 volt replacement

Postby Rudi » Wed May 20, 2009 8:22 pm

I agree with Raymond.

Check all of your connections make sure that all terminals, terminal connectors and grounds are clean and bright. Ensure good metal to metal contact. Check your battery, and recharge as needed. I have a feeling though that unless you have installed a new battery, it may be time to visit your favourite battery shop :idea: :!:

There is no good reason to ever install an 8 volt battery in a 6 volt system when in reality diagnosing the problem and correctly fixing it will provide optimal results.
Confusion breeds Discussion which breeds Knowledge which breeds Confidence which breeds Friendship

User avatar
Team Cub
Team Cub
Posts: 28518
Joined: Sun Feb 02, 2003 8:37 pm
Location: NB Dieppe, Canada
Zip Code: E1A7J3
eBay ID: ve9rhs
Skype Name: R.H. "Rudi" Saueracker, SSM
Tractors Owned: 1947 Cub "Granny"
1948 Cub "Ellie-Mae"
1951 Cub "Jethro"
Dad's Putt-Putt
IH 129 CC
Circle of Safety Award
Circle of Safety: Y
Twitter ID: Rudi Saueracker, SSM

Re: 8 volt replacement

Postby Harold R » Thu May 21, 2009 4:02 pm

Did you overhaul the starter? Might be time for new brushes.
Harold R
Team Cub Guide
Team Cub Guide
Posts: 3138
Joined: Thu Feb 20, 2003 4:54 pm
Location: Louisiana
Zip Code: 71058
Tractors Owned: 1948,50,53, and 56 Farmall Cubs
1969 International Cub
Circle of Safety Award
Circle of Safety: Y

Re: 8 volt replacement

Postby cubbrian » Thu May 21, 2009 9:54 pm

Here is my experience with my W-6. I replaced the battery (6 volt) and it still was hard to start. Replaced push button starter switch and all of the battery cables. Over the course of 50 plus years, resistance can build up in the cables and starter. I tried the 8 volt route and while in theory it works, those batteries are more expensive and it was always a pain. Also, depending on the size of your battery box, you can buy a 6 volt group 2 battery and it will have more cranking power.
5+ Years
5+ Years
Posts: 761
Joined: Sun Apr 08, 2007 7:47 pm
Location: IN, New Harmony
Zip Code: 47631
Tractors Owned: 1955 Cub w/9 different 1 point implements
1948 Cub
1948 McCormick W-6
1949 H
1949 M
1961 560 w/ 412 fast hitch plow
1966 140
1973 666
Allis Chalmers C w/sickle mower
Case 400
Economy 14 hp tractor

Return to Farmall 100 Series, 100, 130, 140

Who is online

Users browsing this forum: No registered users and 3 guests