(2) Check the terminals and outlets for correctness and tightness.
(3) The electric brush must slide smoothly in brush box.
(4) Check if commutator pieces are clean, if necessary, clean the carbon powder on
gaps between commutator pieces and on the commutator surface with soft down less
cloth. If there is oil on the surface, clean it with white cloth with alcohol. Do it when
stopping the truck.
(5) Check the fasteners for tightness.
(6) The brush holder must be firm. When turning or disassembling, first make a sign,
and then loosen the screw.
(7) When assembling the brush frame, tighten the screw aimed on the marking to
make the electric brush on the original neutral position.
(8) Check the coil insulating resistant periodically. If the data is below normal when
reaching the working temperature, it’s necessary to make it dry.
(9) Open the shutter regularly to check if the inner parts out of shape and the
commutator operating normally.
(10) Usually clean the dirt on the casing to help radiating heat.
(11) Check the motor every half a year as follow methods:
(a) Check and clean the dust of the motor.
(b) Clean or replace the bearing. Pay attention to the abnormal noise of the bearing
when operating.
(c) Check the electric brush for wear, replace it if necessary.
4. Inspecting and polishing of electric brush
(1) Inspection of brush and brush spring
The line marked on the electric brush indicates wearing limit. When roughness is
excessive, replace it.
Measure the tension of the brush spring on the rectifier with spring balance meter.
(2) Polishing of the electric brush
(a) When replacing the electric brush, polish it with 00# emery cloth. When polishing,
pull the cloth left and right.
(b) After polishing electric brush and cleaning commutator, for safety, the motor
should work in limited speed with capacity until the surface of electric brush is polished.
To Next Page
Loading...
