Bedienungsanleitung Yamaha XV920 Virago (Seite 317 von 363) (Englisch)

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8A-14

Chapter 8 Part A Electrical system (XV535 models)

25.2 Four-brush starter motor - exploded view

1 Through-bolt 6 Cable

2 Lockwasher 7 O-rings

3 Brush end cover 8 Starter housing

4 Brush plate 9 O-ring

5 Plastic brush housing 10 Armature

25.5 Two-brush starter - exploded view

1 Cable 7 Washer

2 Terminal nuts and washers 8 O-ring

3 Brush end cover _, 9 Through-bolt

4 Brush plate 10 Armature

5 O-ring 11 Starter housing

6 Mounting bolt

Disassembly

Four-brush starter

Refer to illustration 25.2

2 Mark the position of the housing to each end cover. Remove the

two through-bolts and their lockwashers and detach both end covers

(see illustration).

3 Remove the nut and push the terminal bolt through the starter

housing, then reinstall the washers and nut on the bolt so you don't

forget how they go. Pull the armature out of the housing and remove

the brush plate.

4 Remove the two brashes with the plastic holder from the housing.

Two-brush starter

Refer to illustration 25.5

5 Mark the position of the housing to each end cover. Remove the

two through-bolts and detach both end covers (see illustration).

6 Remove the shims and brush plate from the brush housing after

the terminal bolt nut and washers have been removed - note he exact

order of the washers.

7 Pull the armature out of the housing (toward the pinion gear side).

Inspection

Refer to illustrations 25.8, 25.9, 25.10a, 25.10b, 25.11, 25.12 and

25.18

8 The parts of the starter motor that most likely will require attention

are the brushes. Measure the length of the brushes and compare the

results to the brush length listed in this Chapter's Specifications (see

illustration). If any of the brushes are worn beyond the specified limits,

replace the brush holder assembly with a new one. If the brushes are

not worn excessively, cracked, chipped, or otherwise damaged, they

may be re-used.

9 Inspect the commutator (see illustration) for scoring, scratches

25.8 Measure the length of the brushes and compare the length

of the shortest brush with the length listed in this Chapter's

Specifications (four-brush starter shown; twp-brush

model similar)

and discoloration. The commutator can be cleaned and polished with

crocus cloth, but do not use sandpaper or emery paper. After cleaning

wipe away any residue with a cloth soaked in an electrical system

cleaner or denatured alcohol. Measure the commutator diameter and

compare it to the diameter listed in this Chapter's Specifications. If it is

less than the service limit, the motor must be replaced with a new one

10 Using an ohmmeter or a continuity test light, check for continuity

between the commutator bars (see illustration). Continuity should

exist between each bar and all of the others. Also, check for con-

tinuity between the commutator bars and the armature shaft

(see illustration). There should be no continuity between the

commutator and the shaft. If the checks indicate otherwise, the

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