Yanmar 4TNE98, Руководство по обслуживанию, Страница: 236 / 246

4TNV98 & 4TNE98 Diesel Engine Section 7. Starter Motor 234
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.
Figure 11-35
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)) .
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
rpm, amperage draw and voltage. For test
specifications, see page 221 for the appropriate
starter motor.
Installation of Starter Motor
1. Reinstall the starter motor to the flywheel
housing.
2. Reinstall the starter mounting bolts (Figure 11-36,
(1)). Tighten the bolts to specification. See
Tightening Torques for Standard Bolts and Nuts
on page 25.
Figure 11-36
3. Reconnect the electrical wires to the magnetic
switch assembly (solenoid). Be sure to place the
cover over the battery positive (+) cable
connection.
4. Reconnect the battery cables at the battery.