Subaru R1100 service manual Checking Functional Members, Rotor Assembly, Field coil

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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