ProudCubOwner
Member
Are Cubs negative or positve ground?
- Thread starter ProudCubOwner
- Start date
james rumph
Member
My 54 and 55 are positive ground "6 volt".
I don"t know about the more modern ones meaning 185 low boys etc etc. I want to say they are 12 volt negative ground but not sure it"s been a while sence i worked on one.
There is a great website to visit called
www.farmallcub.com
they can answer all your questions.
Anonymous-0
Well-known Member
6 Volt systems were pos ground and early 12v systems are pos ground. What yr Cub do you have.
ProudCubOwner
Member
Its a 1950. What happens if its hooked up backwards?
What happens? It starts and runs fine. The ammeter will register backwards until you swap the wires on the back. You may need to polarize the generator to get it to charge the battery.
On the old tractors, polarity really doesn't matter.
As long as when you're jumping it, you connect + to +, and - to -, you will be fine.
BTW positive ground means that a heavy cable runs from the + on the battery to the frame of the tractor. Just in case.
On the old tractors, polarity really doesn't matter.
As long as when you're jumping it, you connect + to +, and - to -, you will be fine.
BTW positive ground means that a heavy cable runs from the + on the battery to the frame of the tractor. Just in case.
If the battery is hooked up at the incorrect polarity, for one thing the ammeter will register just bass ackwards. If its right when you turn on lights and/or ignition when shes NOT running it should swing over to - discharge,,,,,if it swings over to + charge its backwards......
If it has a Voltgage Regulator and you install the battery backwards and dont re polarize the genny, it can damage the VR.....
It can charge at EITHER + or - polarity ifffffffff its polarized (prior to restart to avoide any VR damage) and then if the ammeter reads backwards its leads can be swapped/reversed to make it register correctly.
If its a batery powered coil distributor ignition versus a Magneto, the coil is polarity sensitive n should be wired to match your ground i.e. for Pos ground the coils lil + wires to distributor.
Since its 6 volts (I assume??) I would connect the battery at POS ground,,,,,,,,,,POLARIZE THE GENNY,,,,,,,,turn on lights and/or ignition not runnign to verify ammeter is wired correct,,,,,,insure correct coil polarity unles its a Mag,,,,,,,start her up ne see what happens
Got it??????????
John T
If it has a Voltgage Regulator and you install the battery backwards and dont re polarize the genny, it can damage the VR.....
It can charge at EITHER + or - polarity ifffffffff its polarized (prior to restart to avoide any VR damage) and then if the ammeter reads backwards its leads can be swapped/reversed to make it register correctly.
If its a batery powered coil distributor ignition versus a Magneto, the coil is polarity sensitive n should be wired to match your ground i.e. for Pos ground the coils lil + wires to distributor.
Since its 6 volts (I assume??) I would connect the battery at POS ground,,,,,,,,,,POLARIZE THE GENNY,,,,,,,,turn on lights and/or ignition not runnign to verify ammeter is wired correct,,,,,,insure correct coil polarity unles its a Mag,,,,,,,start her up ne see what happens
Got it??????????
John T
ProudCubOwner
Member
How do you polarize the generator to get it to charge the battery.
Use a lil jumper wire etc to momentarily flash jump (i.e. connect them just a moment to get a spark then remove) from the VR's BAT terminal over to its ARM/GEN terminal (or direct to gennys ARM post) if it has a VR,,,,,,,,If its a 2 wire Cutout Relay do that from the BAT side of the relay to the gennys ARM post......
John T
John T
Janicholson
Well-known Member
While not running, key off!! JimN
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