Minuteman MPV-31 Wide Area Vac - Manual (Page 10)

Parts and Instruction Manual
Page 6
Maintenance
Periodic maintenance should be followed for good performance and longer machine life. Unplug power cord
from electrical source before making any repairs or adjustments to machine.
Daily:
For cloth bags, shake down bag daily. For paper bags, check if full and replace as necessary.
Check power cord for damaged or frayed insulation.
Return machine to ‘storage’ position when not in use.
Check and remove any string, lint, or debris from around brush and brush housing.
Monthly:
Remove rear wheels and clean axle. Apply thin coat of silicone lubricant on each wheel axle and front casters. This
should be done at least twice a year.
The cloth filter bag can be washed twice before losing its filtering capabilities. Wash with mild detergent and cool
water, drip dry. Make sure bag is totally dry before reinstalling to machine, otherwise electrical shock may occur.
Inspect all hoses, cables, filters, and gaskets. Clogged filters and damaged hoses and gaskets can result in loss
of vacuum.
Brush Adjustment/Replacement
Inspect brush for wear. Adjust or replace brush when necessary.
Adjustment:
1.
The brush housing is set up so you can change the brush position to extend the brush life. When bristles are
worn down enough so there is no contact with floor on lowest setting, you may reposition brush as described:
2. Unplug power cord from electrical source.
3. Remove belt cover by removing three #10 Hi/Lo screws.
4. Remove the two #10-32 screws and washers from each end of brush housing (it may be necessary to remove
housing assembly for easier access).
5. Rotate bearing retainer ring and bearing support ring so that they line up with second set of mounting holes,
which lowers the brush by 1/16”.
Replacement:
1.
Unplug power cord from electrical source.
2. Remove belt cover by removing three #10 Hi/Lo screws.
3. Loosen brush motor plate and roll belt off brush pulley.
4. Remove the ten screws securing brush housing assembly from main body.
5. Loosen set screw, remove pulley from shaft.
6. Remove the two screws and washers from each end of brush assembly.
7. Remove the two flathead screws that attach brush to shaft, slide shaft out of brush core.
8. Inspect bearings; make sure to remove the two bushings at each brush end to replace them on new brush.
9. Install new brush to shaft and assemble accordingly.
10. When attaching bearing retainer and supporting ring, make sure screws and washers are placed on normal
(horizontal) position otherwise machine will not function right.
11. After reinstalling brush housing assembly check for proper belt tension.