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(1) Daily check
a) Insulated resistance. Limit value (≥1 M)
b) Rotor should running agilely without touch.
c) Check up the motor connection whether exact and firm.
d) Check up between commutating piece of commutator whether clean.
Notice: During maintenance, the oil contamination on the commutator should
be wiped clean by lint free cloth dipped in alcohol and electric brush powder
between commutators should be clean up with hairbrush.
e) The fastener whether become flexible and brush rack whether firm.
f) The space between the brush holder of brush rack and the surface of commutator
whether correct and transmuted. (2~4mm)
g) Whether the brush is integrity and glides agilely, the pressure of the balance
spring in gear.
h) The area of interface between brush and commutator should not less than 80%,
and require polished with 00 type of thin emery cloth before instead.
(2) Daily maintenance
Notice the surface of motor, for example the mud or other adherent matter on the
housing, to avoid affect motor dispel heat. Check every half a year in gear, main work as:
a) Check outside and surface of motor and clean, cleanup dust.
b) Check, clean and replace bearing, carefully notice whether exist abnormity noise.
c) Check and replace the brush, check and maintain the commutator.
It is normal that the surfaces of commutator assume accordant light red after used a
long time.
Carve and polish the brush：
a) Polish the brush with 00 type of thin emery cloth, drag the emery cloth right or
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