Bedienungsanleitung Yamaha XV920 Virago (Seite 319 von 363) (Englisch)

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8A-16 Chapter 8 Part A Electrical system (XV535 models)

27.7 Measure stator coil resistance

between 1 and 2,1 and 3, then 2 and 3

28.1a Remove the cover bolts (arrows)...

28.1b ... and pry gently at the pry points

(not between the gasket surfaces); there :

one at the bottom ...

28.1c ... and another at the top 28.3 Be sure there are no metal fragments

stuck to the rotor magnets (arrow)

28.4 Slip a new gasket over the

dowels (arrows)

Because of the special tools and expertise required, it is

recommended that the job of checking the charging system be left to a

dealer service department or a reputable motorcycle repair shop.

27 Charging system - output test

Refer to illustration 27.7

Caution: Never disconnect the battery cables from the battery while

the engine is running. If the battery is disconnected, the alternator and

regulator/rectifier will be damaged.

1 To check the charging system output, you will need a voltmeter or

a multimeter with a voltmeter function.

2 The battery must be fully charged (charge it from an external

source if necessary) and the engine must be at normal operating

temperature to obtain an accurate reading.

3 Attach the positive (red) voltmeter lead to the positive (+) battery

terminal and the negative (black) lead to the battery negative (-)

terminal. The voltmeter selector switch (if equipped) must be in a DC

volt range greater than 15 volts.

4 Start the engine.

5 The charging system output should be within the range listed in

this Chapter's Specifications.

6 Follow the wiring harness from the upper side of the alternator

cover (on the left side of the engine) to the electrical connector and

disconnect the connector.

7 Connect an ohmmeter between each pair of terminals in the

connector (the side that runs back to the alternator, not the wiring

harness side) (see illustration). Note the reading.

8 If the reading is not within the range listed in this Chapter's

Specifications, replace the stator (see Section 28).

9 If the reading is within the Specifications, refer to the wiring

diagrams at the end of the book and check the charging circuit for

breaks or poor connections. If the wiring is good, replace the

regulator/rectifier (see Section 28).

28 Alternator cover, stator, rotor and regulator/rectifier -

removal and installation

Cover

Refer to illustrations 28.1a, 28.1b, 28.1c, 28.3, 28.4 and 28.5

1 Loosen the alternator cover mounting bolts evenly in a criss-cross

pattern and remove the cover (see illustrations).

2 Clean all traces of old gasket sealer from the cover and its mating

surface on the engine.

3 Make sure there are no metal particles stuck to the rotor magnets

(see illustration).

4 Position a new gasket over the dowels (see illustration).

5 Guide the wiring harnesses through the opening at the back of the

cover (see illustration). Install the cover and tighten the Allen bolts

evenly, in a criss-cross pattern, to the torque listed in this Chapter's

Specifications.

Stator

Refer to illustration 28.7

6 Remove the alternator cover as described above.

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