Just curious 6v 12v

Determined

Well-known Member
Has anyone ever seen a chewed up ring gear with mushroomed over teeth, like the ones commonly seen on old tractors with 6 volt systems?
Some of them are messed up so bad that even a new drive gear has trouble engaging and quickly fails.
Most often seen on a neglected starter with poor connections that can not deliver enough power to crisply engage the drive and usually associated with a loose starter, excessive play in bearings or bushings, bent armature shaft, corrosion etc.

Often when you hook up one of those starters to a 12 volt battery and correct any of the problems listed above it does not take long for that firm engaging drive to clean up all of those burrs and create a real nice pattern when you check the mesh to the ring gear, this is assuming the starter was properly installed and shimmed as required.
 
A starter that does not have a solenoid and lever to engage the drive in the ring gear depends on inertia to engage the drive. The armature must spin up fast enough to spin the drive out to engage the ring gear before it starts to turn with the armature. Using 12 volts will make the armature spin up faster and reduce the chance that the drive will already be spinning when it gets to the ring gear. My experience has been that 12 volts causes less problem with the ring gear teeth being damaged that a starter run on 6 volts. 12 volts does cause more stress on the drive spring and it not unusual to see damage there. The newer style drive reduces those problems.
 
Geez maybe it is time for me to poke the beehive with a big stick!

Have put in ring gears in two straight 6 volt tractors. One needed it and one was marginal and I had it apart for restoration.

Have also replaced a ring gear in a converted one and the real problem there was a bad drive.

Really don't see how voltage has anything to do with it. Only differnce I can figure is maybe the drive is engaging a bit harder. Torque isn't changing due to voltage just speed. In this case the torque is determined by the resistance of the engine not the starter motor.

I have converted tractors I want to be able to depend on and will make sure that restorations get the cables that are heavy enough to make 6 volts work. That and the ground are crucial in all systems and even more so in 6 volt.

Oh yeah don't put a ignition resistor on a conversion either. Those will get ripped off and thrown in the trash as I have had to do many more times than replace points or condensors.

There, now I need to get away from these dang bees before I get stung.

jt
 
The drive engages much harder when on 12v. Six volt starters on 12 volts will break bindex springs more often.
 
PERHAPS WE SHOULD HAVE A CEMITARY FOR ALL THE DEAD HORSES.
THE TOMBSTONES WILL READ

TRICKLE CHARGE
BATTERY MAINTAINER
GROUND WIRES
NEUTRAL WIRES
3 WIRES
NO 4 WIRE
WIRE SIZE
DEAD BATTERIES
DEAD ALTERNATORS
WHAT COLOR TO PAINT
WHAT'S IT WORTH
TODAY'S JOKE
HEAT PUMPS
BEST TRACTOR
WORST TRACTOR
BEST WAY TO HEAT
SCRAP PRICES
WHAT OIL SHOULD I USE
BEST CHAINSAW
WORST CHAINSAW
I HATE ETHANOL
DIESEL JELLED
WON'T START, WHAT'S WRONG
SHOULD I CONVERT TO 12V
TAXES
ESTATE PLANNING
HEALTH CARE
I HATE.....
WAL-MART
MENARDS
LOWES
MY BOSS
HOW MANY GALLONS WILL FIT IN CONTAINER
SPELLING POLICE
COMPUTER DIED

I'M SURE THERE ARE MORE DEAD HORSES.
SORRY, I'M RESPONSIBLE FOR SOME OF THE DEAD HORSES.
 
That's exactly what the boys at Auto Zone told me today. They said they see a lot of damaged starter drives off old 6v tractor starters.
 

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