No-Load Test - Yanmar 3TNV82A-B Service Manual

Starter Motor
5. If the measured L dimension is outside the
standard range, adjust the dust covers to obtain
the standard range. Dust covers
(Figure 11-34, (1)) are available in 0.020 in (0.5
mm) and 0.031 in (0.8 mm) thicknesses.
Figure 11-34

No-Load Test

Test the characteristics of the starter motor by
performing a no-load test.
CAUTION
The starter motor can be damaged if
operated continuously longer than
10 seconds while performing the
no-load test.
1. Secure the starting motor in a vise or other
suitable fixture.
2. Connect an ammeter (Figure 11-35, (1)) in
series between the battery positive (+) terminal
(Figure 11-35, (2)) and the main positive (+)
terminal (Figure 11-35, (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.
TNV DI Service Manual
(3)
(1)
3. Connect a wire lead between the mounting
base of the starter motor (Figure 11-35, (4))
and the battery negative terminal
(Figure 11-35, (5)).
0000133
4. Connect a voltmeter (Figure 11-35, (7)) to the
battery negative (-) terminal (Figure 11-35, (5))
and the main positive (+) battery terminal
(Figure 11-35, (3)) on the starter motor.
5. Install a switch (Figure 11-35, (6)) in a circuit
between the battery positive (+) terminal
(Figure 11-35, (2)) and the starter magnetic
switch (solenoid) terminal (Figure 11-35, (8))
on the starter motor.
6. Use a suitable tachometer to monitor the rpm of
the starter.
7. Turn the switch to the ON position. Monitor the
0000034en
rpm, amperage draw and voltage. For test
specifications, see 3TNV82A to 4TNV88 -
Standard and Optional and 4TNV94L to
4TNV106T - Standard and Optional on
page 11-5 for the appropriate starter motor.
STARTER MOTOR
(6)
(8)
M
(4)
Figure 11-35
(1)
(2)
(7)
(5)
0002127A
11-19