H-P Products 6970g, Instruction Manual

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(E) REMOVING THE DRIVE BELT AND BRUSH
“It is recommended this procedure be performed by a Qualified Service Technician.”
Should the drive belt or brush become clogged with debris or need replacing:
1. Turn off vacuum system and disconnect powerhead.
2. Remove belt cover as described in procedure C.
3. Remove the 3 screws securing the metal baseplate. (see Fig. 4)
4. Lift front of baseplate up from bumper, then pull baseplate free of unit.
5. Stubborn debris may now be easily removed from the brush area.
6. PLEASE NOTE: Correct brush and belt orientation; they must be re-installed correctly for proper function.
7. Slide the belt up off the end of the drive shaft.
8. Partially remove the bumper by lifting it free from the front and sides of the housing.
9. Lift the lower belt shroud, brush, belt and support assembly out of the housing, and remove the belt from the
brush. Leave upper belt shroud installed in the housing, unless stubborn debris remains lodged below it.
10. (IF REPLACING BRUSH). Pull the right brush support (marked ‘R’) off the assembly and remove the brush
from the shaft.
11. Slide replacement brush onto the shaft so the large recess at one end of the brush goes on first and fits
over the 4 ribs on the shaft support.
12. Push the right shaft support (marked ‘R’) onto the shaft extending through the brush, and check that the
brush spins freely when rotated.
13. Place the belt over one end, onto the brush.
14. Slide the brush/belt assembly back into the housing recesses so the supports seat properly into the housing.
NOTE: The housing and supports are marked L and R and must be assembled accordingly. The ARROWS
on the shaft supports must point toward the rear of the unit, when fitting a new belt. The supports can be
rotated to point the arrows forward to increase belt tension after extensive use (typically several hundred
hours of use).
15. Place the lower belt shroud into the housing, over top of the brush pulley, as shown in FIG. 4. Ensure that
the top of the shroud cylindrical portion is flush with the upper housing screw boss.
16. Stretch the bumper around the housing, over the shaft supports and press the bumper into place.
17. Pull the belt gently up against the pulley teeth, and over the idler bearing. Twist the end of the belt 90° as
illustrated on the lower housing and press the belt over the teeth of the drive shaft.
NOTE: The brush will rotate in the wrong direction and belt damage may occur if the belt is twisted
incorrectly.
18. Tilt baseplate to the rear of brush area and insert the three tabs into the mating slots in the lower housing.
Rotate the front of the base down so it seats into the groove in the bumper.
19. Replace the three screws, and tighten to secure the base.
20. Replace the belt cover as described in procedure ‘C’.
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