HITACHI CV-4700 CV-4800 - HOW TO REPLACE THE CARBON BRUSH ASSEMBLY - VACUUM CLEANER

TO REPLACE CARBON BRUSH ASSEMBLY
Take off four screws [M4X14], then the carbon brush assembly can be removed.
Put the new carbon brush assembly in place, and release the carbon brush by pushing up the holder pin toward the motor center.
Connect the lead wire with the terminal on carbon brush assembly.  [[When replacing carbon brush assemblies, be sure to replace the worn out carbon brush assembly with new one on both sides.  Be sure to connect the lead wire in proper way as shown in figure.]]

                                            Click on images to Enlarge

CARE OF AIR FILTERS
Remove the filter as shown, and wash in warm water
Dry through away from direct sunlight  and fit them back into the cleaner.
Remove the old filter from the cage and discard it.
Position the new filter in cage, and replace the cage in the cleaner

After assembly, run the cleaner for at least 15 minutes without joining the hose to its main body and be certain that there is no abnormal vibration.
Measure the insulation resistance between power supply plug and the metal surface by 500VDC insulation resistance tester and be certain that the insulation resistance is not less than 10M ohm.

CARBON BRUSH ASSEMBLY --> PART NUMBER --> CV-2500  911