Rotor Assembly - Robin America RGX7100 Service Manual

6-4.ROTOR.ASSEMBLY
1) Field coil
Remove the brush holder and measure
resistance between the slip rings .
Rotor.
(Slip.ring)
220V
RGX7100 49.0
RGX7800 55.0
NOTE : I f the circuit tester is not sufficiently accurate, it may not show the values given and may
give erroneous readings.
Erroneous reading will also occur when there is a wide variation of resistance among coil
windings or when measurement is performed at ambient temperatures different from from
20°C (68°F).
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 . Care
should be taken not to touch the rotor coils
with the sandpaper .
50Hz 60Hz
240V 120/240V
49.0 49.0
55.0 55.0
SLIP RING
(Ω)
ROTOR
SLIP RING
- 19 -
CIRCUIT TESTER
(Resistance)
ROTOR
SANDPAPER