Charging (3UZ-FE): Generator: Inspection

INSPECT GENERATOR ROTOR ASSEMBLY
1. Check the resistance.
  1. Measure the resistance between the slip rings.
    Standard resistance:
    
    2.1 to 2.5 Ω at 20°C (68°F)
    
    If the result is not as specified, replace the generator rotor assembly.
    
    Fig 1: Measuring Resistance Between Slip Rings
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Measure the resistance between the slip ring and rotor core.
    Standard resistance:
    
    10 kΩ or higher
    
    If the result is not as specified, replace the generator rotor assembly.
  Fig 2: Measuring Resistance Between Slip Ring And Rotor Core
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check the slip ring diameter.
  1. Using a vernier caliper, measure the slip ring diameter.
    Standard diameter:
    
    14.2 to 14.4 mm (0.559 to 0.567 in.)
    
    Minimum diameter:
    
    14.0 mm (0.551 in.)
    
    If the result is not as specified, replace the generator rotor assembly.
  Fig 3: Measuring Slip Ring Diameter
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Check the bearing condition.
  1. Check that the bearing is not rough or worn.
    OK: The bearing rotates smoothly.
    
    If the result is not as specified, replace the generator rotor assembly.
  Fig 4: Checking Bearing Condition
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT DRIVE END FRAME
1. Check that the front bearing condition.
  OK:
  
  The bearing rotates smoothly.
  
  If the result is not as specified, replace the front bearing (see REPLACEMENT ).
Fig 5: Inspecting Drive End Frame
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT GENERATOR BRUSH HOLDER ASSEMBLY
1. Using a vernier caliper, measure the brush length.
  Standard length:
  
  9.5 to 11.5 mm (0.374 to 0.453 in.)
  
  Minimum length:
  
  4.5 mm (0.177 in.)
  
  If the brush length is less than the minimum, replace the generator brush holder assembly.

Fig 6: Measuring Exposed Brush Length