Cub-cadet Yanmar 3TNV72 User Manual download pdf (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

(8)

(3)

(6)

(1)

(2)

(5)

(7)

(4)

0002127A

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