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Page 34 Powder Hopper Loaders
6-2 Replacing Motor Brushes
Note: Make sure that you replace motor brushes before the brush
shunt touches the commutator. Replacements and spares
are available from the manufacturer.
Powder hopper loader vacuum motor brushes require periodic
replacement. Maintain a supply of motor brushes, and establish a
preventive maintenance program to reduce downtime.
Make sure that you properly seat replacement brushes to
achieve maximum service life. Unseated brushes may fail
prematurely and increase your maintenance workload.
WARNING! HAZARDOUS ELECTRICAL CURRENT PRESENT.
Secure the machine
BEFORE servicing!
WEAR SAFETY GLASSES BEFORE performing
this procedure!
Use a stable platform if working above floor
level.
Removing Old Motor Brushes
1. If you haven’t already done so, disconnect the hopper
loader from the electrical supply!
2. Disconnect motor and blowback connection receptacles at
the control enclosure.
3. Release the latches that secure the cover assembly. Lift off
the cover assembly by the edges.
Remove the motor from the cover assembly by carefully
releasing the springs. Springs are under tension, so be very
careful!
5. Remove the brush end cap, then the two brush clips from
the brush holder.
6. Remove the two brushes from the brush holder, and replace
with new brushes.
Replacement and Reassembly
1. Re-attach the brush clips and the end cap after you make
sure that the brush assembly is properly seated.