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This new starter drive easily replaces the original Model "A"
starter Bendix. It has no bolts, springs, or lock washers to break and fall into
the flywheel housing. This is a modern style drive manufactured for long term
performance in 6 volt and 12 volt starters in the stock Model "A" or in high
torque and high horsepower engines. Installation requires no modification of the
original starter. The old drive is removed and the new drive is placed on the
starter shaft using the same key and same shaft detent
New starter drive
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Original Bendix
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How the Drive Works
This new barrel style Starter Drive is designed to replace the starter "Bendix"
and will fit all 1928 through 1931 Model A & B cars and trucks which use a 5/8
inch diameter starter shaft. (The only exception is a very few early 1928
starters which used a smaller ½ inch starter shaft which was prone to bending.)
This new barrel style starter drive and the Bendix both use inertia to engage
and disengage the drive gear from the flywheel.
When the engine starts, the flywheel rpm exceeds that of the starter motor and
the starter drive gear pinion disengages from the flywheel ring gear and spins
away from the flywheel on the helix, throwing it to the end of the starter
shaft.
The Bendix utilizes a large spring that is held on the shaft with two bolts. The
spring is used under tension to stop the inertia of the spinning pinion gear.
A shock absorbing rubber cushion is used on the barrel starter drive to
effectively absorb the shock of the pinion gear when it reaches the end of the
starter shaft.
The starter drive pinion gear is held away from the flywheel until the starter
motor is energized once again to start the engine.
Instructions to Install the New Starter Drive
- Remove the starter from the engine and remove the old Bendix from the
starter shaft.
- Make sure the starter shaft is 5/8 inch diameter and is straight and in
good condition.
- The set screw is usually partially turned out for easier installation. If
the set screw head is partially covered by the washer, perform the following
steps.
Using your hands or two screwdrivers and with the new
starter drive on the starter shaft, firmly push the large washer away from
the set screw and with a screwdriver, slowly turn the screw out until it
will hold the washer away from the set screw. Turn out the set screw only
enough to allow the drive to slide completely on the starter shaft.
- Install the key in the shaft and slide the drive back toward the end of
the starter shaft until the screw is located directly above the detent in the
shaft. Tighten the set screw into the shaft detent until snug. The washer will
then spring over half of the set screw and prevent it from falling out.
The starter may now be re-installed.
Starter Drive Development
Henry Ford invented and manufactured many items for the Model A
Ford. There were also many items for his cars that he would purchase from other
manufactures due to patents and or manufacturing limitations. The starter drive
used in the Model A was patented and manufactured by Vincent Bendix in 1910 and
that is why it is commonly referred to as the starter "Bendix".
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