RM35X0E _57 Power Source / Network _078664 7GR-FKS BATTERY / CHARGING _0386628 GENERATOR G

7GR-FKS BATTERY / CHARGING  GENERATOR  INSPECTION  


PROCEDURE

Hide 27370 1.INSPECT GENERATOR BRUSH HOLDER ASSEMBLY

A128079C27
0.693,0.687 0.870,0.857 0.177,0.170 10 *a
*a Length


a.

Using a vernier caliper, measure the brush length.

Standard exposed length:

9.5 to 11.5 mm (0.374 to 0.453 in.)


Minimum exposed length:

4.5 mm (0.177 in.)


If the brush length is less than the minimum, replace the generator brush holder assembly.


Hide 27330 2.INSPECT GENERATOR ROTOR ASSEMBLY

A079306

a.

Check that the generator rotor bearing is not rough or worn.

If necessary, replace the generator rotor assembly.


b.
B012264C24
0.333,1.135 0.24,0.375 0.24,0.375 0.438,1.073 false 0.156,0.167 0.438,0.354 0.281,0.188 10 false *a
*a Slip Ring


Check the generator rotor assembly for an open circuit.

i.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Generator Assembly Type Tester Connection Condition Specified Condition
for 100 A Slip ring - Slip ring 20°C (68°F) 1.8 to 2.2 Ω
for 130 A 1.55 to 1.95 Ω


If the result is not as specified, replace the generator rotor assembly.



c.
B012265C21
1.302,0.771 1.563,0.677 false 0.448,1.219 0.875,1.552 false 0.896,1.49 1.167,1.656 0.271,0.167 10 false *a 1.594,0.563 1.885,0.771 0.292,0.208 10 false *b
*a Slip Ring
*b Rotor core


Check the generator rotor assembly for an open circuit.

i.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
Slip ring - Rotor core Always 1 MΩ or higher


If the result is not as specified, replace the generator rotor assembly.



d.
A124106C12
0.658,0.485 0.837,0.638 0.179,0.154 10 *a
*a Diameter


Using a vernier caliper, measure the slip ring diameter.

Standard diameter:

14.2 to 14.8 mm (0.559 to 0.583 in.)


Minimum diameter:

14.0 mm (0.551 in.)


If the diameter is less than the minimum, replace the generator rotor assembly.