Cub Cadet Yanmar 3TNV72 - Manual (Page 232)

STARTER MOTOR
TNV IDI Service Manual 10-19
Starter Motor
Check Pinion Projection Length
1. Connect the positive (+) lead from a battery to
the “S” terminal.
2. Connect the negative (-) lead to the “M”
terminal.
3. Lightly pull the pinion away from the gear
housing.
4. Turn the switch ON and measure the pinion
moving distance L in the thrust direction
(Figure 10-35). Perform this test within 10
seconds.
Figure 10-35
See Starter Motor Specifications on page 10-6 for
service limit.
5. If the measured L dimension is outside the
standard range, adjust the dust covers to obtain
the standard range. Dust covers
(Figure 10-36, (1)) are available in 0.020 in.
(0.5 mm) and 0.031 in. (0.8 mm) thicknesses.
Figure 10-36
No-Load Test
Test the characteristics of the starter motor by
performing a no load test.
1. Secure the starting motor in a vise or other
suitable fixture.
2. Connect an ammeter (Figure 10-37, (1)) in
series between the battery positive (+) terminal
(Figure 10-37, (2)) and the main positive (+)
terminal (Figure 10-37, (3)) on the starter
motor.
Note: The ammeter and all wire leads used in
this test must have a capacity equal to or
greater than the amperage draw
specification for the starter motor being
tested.
Figure 10-37
3. Connect a wire lead between the mounting
base of the starter motor (Figure 10-37, (4))
and the battery negative terminal
(Figure 10-37, (5)).
4. Connect a voltmeter (Figure 10-37, (7)) to the
battery negative (-) terminal (Figure 10-37, (5))
and the main positive (+) battery terminal
(Figure 10-37, (3)) on the starter motor.
0000132
0000133
(1)
CAUTION
The starter motor can be damaged if
operated continuously longer than
10 seconds while performing the
no-load test.
0000034en
M (8)
(3)
(6) (1)
(2)
(5)
(7)
(4)
0002127A
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