Testing Starting Motor - Plymouth Pl4S Service Manual

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STARTING MOTOR
169
( 4) Position the frame assembly over
the armature and align the attaching bolt
holes.
( 5) Place the commutator end plate on
the armature shaft and align the attaching
bolt holes· with the frame. Install the two
long frame screws through the end plate and
frame and screw them down into the pinion
housing. Tap the end plate and pinion hous-
ing while tightening the screws, to align the
bushings.
( 6) Raise the brush springs and place
the brushes into the proper holders. Make
sure that the ground brushes are in the
grounded holders and see that brush leads
are not rubbing against the armature.
( 7) Install the starting motor switch
over the terminal with the switch button to-
ward the pinion end. Press the shift yoke
lever down so that the switch button is de-
pressed. Screw the button in or out of the
switch to adjust the pinion clearance to 1 / 16
to 1/32 inch (fig. 6).
CAUTION
Do r.ot attempt to change the
starting motor pinion clearance
without removing starting motor
to verify propet setting.
6. 'TESTING STARTING MOTOR.
]'93642
( 1) If test equipment is available, con-
nect the starting motor to a test bench
equippe<;l with a fully charged 6-volt battery
with one lead grounded to the starting motor
frame.
( 2 ) Press the switch button and adjust
the resistor to 5.5 volts.
( 3) Run the starting motor about two
minutes to seat the brushes, if necessary. The
ammeter should read current draw as speci-
fied in "Data and Specifications" Chart while
the starting motor is running free.
( 4) If a test bench is not available, con-
nect the starter to a battery and press starter
switch. If the armature revolves smoothly at
a satisfactory speed the unit will crank the
engine.
( 5 ) Connect the starting motor to the
test bench as explained in step ( 1 ) above.
Mount torque arm and spring scale on the
starting motor. Close the test stand switch,
press the switch button and adjust the re-
sistor so that 3.0 volts are shown on the volt-
meter. The current reading on the ammeter
and the tor'"ue developed should be within
limits given in the "Data and Specifications"
Chart on page 165.