12-Volt Conversion with a Hitachi 14231 Alternator
There has been an awful lot of questions regarding converting a 6-Volt
Cub to a 12-Volt system using the Hitachi 14231 Alternator.
Here is how I converted my cubs. You can do it with simple hand tools
and in about three hours.
1. Hitachi Alternator 14231 P/N Available at auto parts stores.
2. The battery. P/N 26/26R is available at auto parts stores. It will
fit the cub battery box.
3. Electronic iginition, coil, voltmeter, blocking diode and inline
fuse. From: Genesee Products.
4. 3/8" X 2-1/16" long black pipe, 3/8" X 7-1/2" long hex head bolt,
lock-washer and nut.
The alternator can be attached to the bracket for the cub generator.
The lugs on the alternator, the cub generator bracket , and the 3/8"
dia. black pipe are to be reamed to 13/32" diameter. The front lug on
the alternator is to be installed in front of the cub generator
bracket. Install the 3/8" X 2-1/16' black pipe between the back lug on
the alternator and the original cub generator bracket. All of this is
to be bolted in place with the 3/8 X 7.5 long bolt.
Also the alternator will have a split pulley on it. Remove the
nut and install spacers between the pulley halves so the belt will fit.
Throw away the lock washer and lock tite the nut on the alternator
shaft. Attach the belt tensioning bracket with a metric bolt to the
alternator and adjust the belt tension.
The alternator will have three places to hook wires on the back of it.
They will be marked as Bat., S, And L. Make a short jumper wire
assembly from 12 gauge wire with a spade terminal on one end and a
lug terminal on the other. Attach this jumper to the Bat and the S
terminals. All of the wire assemblies described in the following
instructions are to have swaged on terminals sized to match the
screws, studs or terminals they are attached to. Make another wire a
ssembly from 10 gauge wire long enough to get to the starter terminal.
Attach this wire assembly to the starter terminal and the Bat term on
the alternator. Make a wire assembly from 12 gauge wire to attach to
the starter terminal and one terminal on the pull switch. Install a
20 amp inline fuse in this wire assembly. On the other side of the
pull on iginition switch make three wire assemblies to go to the volt
meter, the postive side of the coil and the L terminal on the
alternator each component will have one wire assembly to it. Install
the Volt Meter in the hole where the ammeter was. Attach wire assembly
from pull on iginition switch to the positive side of the volt meter
and make a wire assembly from 12 gauge wire and attach to the negative
side of the volt meter and chassis ground to the tractor. Make a wire assembly from 12 gauge wire to connect the coil to the
pull on ignition switch on same terminal as the volt meter. Make a wire assembly from 12 gauge wire to go from the pull on ignition
switch same terminal as volt meter,and the coil to the L terminal on
the alternator. The blocking diode will need to be installed in this
wire assembly with the arrow pointing to the alternator. Gather all
of the wires together and dress them with plastic tape or one of the
plastic covers (wire loom) available at the auto parts store.
If you got every thing right then crank her up and take pride in your
self. If she does not crank then give me a good cussing.
If you want lights then you will need to wire a 12-volt switch from
Case IH to the pull on iginition switch. If wired to the same terminal
as the volt meter, coil and alternator then the lights will go off
when you push the pull on ignition switch to off. This will keep the
battery from going down if you forget to turn the lights off. The
lights or bulbs will need changed to 12 volt. The lights and the light
switch can be wired the same as the cub service manual shows. Install
the battery with the negative side to ground and the postive side to
the starter terminal.
I would not convert at all without installing the electronic ignition.
This does away with the points and the condenser. These two items
have to be serviced often and cause a lot ot the problems. Install the
electronic ignition according to the instructions with it.
I have two Cubs converted and a 1964 4000 Ford and all three are
very dependable and trouble free.
Pictures will be available soon!