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 splines which engage splines of positork
bly.
After the engine starts, flywheel
rotation speed is faster than that of the
At the opposite end is
drive assembly.
armature which causes the positork drive
the commutator which is the electrical
assembly drive gear to override.
point of contact of the armature.
d.
When the pressure on the shifting
lever is released, the return spring (G)
a.
retracts the shifting lever.
This opens
Starter engagement is performed
manually through the movement of the shift-
the contacts of the switch assembly and
disengages the positork drive assembly.
ing lever (J). The shifting lever causes
the yoke (K) to slide the positork drive
assembly (L) to the engaged position. At
6. Data
the same time it acts against the blade
24 v dc
Voltage. . . . . . . . . . . .
and plunger rod (H) and closes the con-
tacts of the electrical switch assembly.
Current at rated load
(rated max) . . . . . . . . . 38o amps
b.
Torque (rated) . . . . . .
Starter operation begins when the
21.0 ft-lbs
contacts are closed thereby completing the
Pinion speed:
No load at 20 v dc . . . . . . 5300 rpm
electrical circuit.
Electrical current
then flows to the starter through the ter-
Rated at 21 v dc and 38o amps . . 1625 rpm
minal post (fig. 1), forming magnetic
Efficiency (rated). . . . . . . . .
63%
fields about the field coils (F) and arm-
Pinion rotation (facing
ature (Q).
The magnetic fields produced
drive end) . . . . . . . .
clockwise
have the same polarity and torque results
Number of teeth on positork
drive assembly (pinion) . . . . . . 12
causing the armature to rotate.
The com-
Mounting data:
mutator and brushes (D) act as a reversing
Number of mounting holes . . . . . 3
switch and keep the magnetic field around
Diameter of mounting holes . 0.6562-in.
the armature the same polarity as the
Mounting hole circle
magnetic field about the field coils. This
diameter . . . . . . . . . 5.76-in.
effect results in continuous rotation of
Length . . . . . . . . . . .
16.87-in.
the armature.
Diameter . . . . . . . . . . . .
5-in.
Weight . . . . . . . . . . . . 48.5 1bs
This torque is transferred to the
c.
engine through the positork drive assem-
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