4-4) CHECKING FUNCTIONAL MEMBERS

(1)STATOR

Measure the winding wire resistance. Check the resistance of the wires that comes out from the stator using a tester, referring to the following table.

NOTE: When measuring according the numerical value shown in the chart, tolerance should be considered because the inaccuracy of the tester. If an accurate value is needed, measure by electric resistance using an Ohm-meter.

While doing this, use caution to avoid contact resistance.

Generator wire resistance

 

 

Unit ; Ω

 

 

AC 120V

AC 230V

AC 240V

 

Color of the wires

Specification

Specification

Specification

Main coil

Black-White

1.7

7.4

7.7

Exciter coil

Yellow-Yellow

2.7

3.1

3.1

DC coil

Brown-Brown

1.2

1.2

1.2

(2) ROTOR ASSEMBLY

 

 

 

1) Field coil

 

 

 

Rotor

Measure resistance between the slip rings.

Slip ring

 

 

Resistance (Ω)

 

Field coil

 

35

 

 

(Between two Slip rings)

 

 

 

 

 

NOTE : When measuring, tolerance should be considered

 

because of the tester inaccuracy, winding

 

number variation, ambient temperature etc.

 

2)Cleaning Slip rings

The slip ring surfaces must be uniformly bright. Slip rings showing black spots, excessive wear, or uneven wear must be repaired.

A stained slip ring lowers generator efficiency and output voltage.

Polish the slip rings with fine sandpaper while turning the rotor until rough spots disappear.

NOTE : Care should be taken not to touch the rotor coils with the sandpaper.

Slip ring

Rotor

Sandpaper

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Subaru R1100 service manual Checking Functional Members, 1STATOR, Field coil, Measure resistance between the slip rings

R1100 specifications

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