Bissell 3750 EN - Manual (Page 11)

You should check your vacuum cleaner’s Rotating Floor Brush and
Drive Belt regularly for wear or damage. You should also clean the
brush and brush ends of strings, hair, and carpet fibers. These can
wrap around the brush and hamper its ability to effectively clean
your carpet. Also remove any debris that has accumulated under
the brush cover.
Unplug cleaner from electrical outlet.
Remove Detachable Canister from vacuum cleaner.
Recline Handle and turn vacuum cleaner over so bottom
side is up.
Remove the six screws as shown with a Phillips
head screwdriver. Lift the Brush Cover off.
Grasp Rotating Floor Brush at both ends and lift.
Clean strings, hair and other debris from Rotating Floor
brush, paying particular attention to brush ends.
Clean strings, hair and other debris from Motor Pulley
and Drive Belt areas.
Check Drive Belt carefully for wear, cuts or
stressed areas.
Check Air Passageway for obstructions. Remove debris
from this area.
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CAUTION:
To reduce the risk of
injury from moving
parts, turn off vacuum
cleaner and disconnect
Power Plug from
electrical outlet.
Check Rotating Brush and Drive Belt
Air Passageway
Motor Pulley