DR ALL-TERRAIN Wartungshandbuch PDF herunterladen (Seite 507)

100

101

ELECTRICAL SYSTEM 16-31

Charging System

If the battery voltage does not increase as the engine

speed increases, then the regulator/rectifier is defective

or the alternator output is insufficient for the loads. Check

the alternator and regulator/rectifier to determine which

part is defective.

Alternator Inspection

There are three types of alternator failures: short, open,

or loss in rotor magnetism. A short or open in one of the coil

wires will result in either a low output, or no output at all. A

loss in rotor magnetism, which may be caused by dropping

or hitting the alternator, by leaving it near an electromag-

netic field, or just by aging, will result in low output.

•

To check the alternator output voltage, perform the follow-

ing procedures.

○

Remove the middle cover (see Middle Cover Removal in

the Frame chapter).

○

Disconnect the alternator connectors [A].

○

Connect a hand tester [B] as shown in the table.

○

Start the engine.

○

Run it at the rpm given in the table.

○

Note the voltage readings (total 3 measurements).

Alternator Output Voltage

Connections Reading

Tester Range

Tes ter ( +) t o Tes te r ( –) t o @4 000 rpm

250 V AC One bla ck lea d

Another black

lead

54 ∼ 80 V

If the output voltage is within the values in the table, the

alternator is operating correctly, and the regulator/rectifier

is damaged. A much lower reading indicates that the al-

ternator is defective.

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