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Tractor Talk

Re: Re: Re: 6 Volt, Reverse Grounded?!?


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Posted by Gerald on September 25, 1998 at 20:22:25:

In Reply to: Re: Re: 6 Volt, Reverse Grounded?!? posted by Jeff King on September 25, 1998 at 17:52:43:

: : : I am restoring a '64 Ford 4000, 4 cyl. gas tractor.

: : : Installed a new battery last night. "Pucker Factor"
: : : was high as I have never attached the positive post of
: : : a battery to a ground wire before.

: : : I have a couple of questions if anyone can help:
: : : 1. How many cranking amps are required? This new battery
: : : will barely turn the motor over. It could be a battery
: : : which has been on the shelf a while, I guess. Voltage
: : : tester reads over 6 volts, however. Ford Repair Manual
: : : does not mention minimum cranking amps.

: : : 2. How would you jump start this backwards grounded
: : : system? I have a lawn mover which is 6 volts also, but
: : : should I attach + to +, - to frame, or vice versa?

: : : Any assistance would be greatly appreciated.

: : : Sincerely,
: : : Tommy D....

: : If you jump start you have to observe polarity. Connect + to + and - to -. Avoid touching the frames together. Two dead batteries may result after the sparks die away.

: : Its important to clean the battery posts and the terminals until they shine before you connect them, else you will get excessive voltage drop. A good 6 volt #1 battery should spin that engine well, providing its got oil and a working oil pump and the starter is good with all brushes and decent bearings. Its not a bad idea to disconnect and wire brush all battery cable connections and make sure they are snug. That means the terminal posts too.

: Be sure that your battery cables are rated for 6 Volt use. Oftentimes you fill find that someone has swapped one out with say a #4 gauge that is only good for 12 volt use. If your cabling is all up to snuff, pull the starter and take to a rebuild shop. My '57 Case actuall melted the end off of a battery cable trying to start it hot one day. Had the rebuild shop go through the starter, turn the commutator, new brushes, new bushings and drive. Spins over like a Toyota now. Was well worth the $ 60.

: Best Luck.

: JPK

Good point. If #4 is good for 12 volts, #1 is needed for 6 volts to handle twice the current.


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