Case 580SR Service Manual page 969

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REMOVING AND INSTALLING THE STARTER
MOTOR
Z Disconnect the ground cable (negative) from the
battery.
Z Remove the rear protection cover and disconnect
all cables connected to the starter motor.
Z Remove the three retaining screws of the starter
motor and remove the starter motor.
Z To install the starter motor again, proceed in the re-
verse order to that of removal.
TEST BENCH CHECK
Checking the starter motor without load
NOTE: before carrying out the test, check that the
battery is fully charged then obtain a battery-starter
motor testing device (quick discharge) and a carbon
cell (variable load resistance).
Z Lock the starter motor in a vice with soft jaws.
Z Connect the negative cable (4) of the battery to the
mounting flange of the starter motor.
Z Connect a short cable (6) between the solenoid
battery wire and the terminals of the solenoid
switch.
Z Connect the positive cable of the voltmeter (3) to
the positive terminal of the battery and the negative
cable to the negative terminal of the battery, the
positive cable of the ammeter (1) to the positive ter-
minal of the battery and the negative terminal the
solenoid valve battery or to the starter motor clamp.
Z Install a tachometer (5) at the end of the armature
shaft. Activate the starter motor by adjusting the
carbon cell (2) to obtain a voltage of 11 V. When
the armature is rotating at 3000 rpm, the maximum
current draw must not exceed 200 A.
Z If the starter motor does not operate in these con-
ditions, check that the field coils are not grounded,
that the armature is not rubbing and that its shaft is
not deformed.
SECTION 55 - ELECTRICAL SYSTEM
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