DR Power Walk-Behind 6.5 (Pre-August 2010) - Manual (Page 8)

4 DR ® WALK-BEHIND LEAF & LAWN VACUUM
To raise or lower the vacuum nozzle, turn the crank
handle clockwise or counterclockwise. #21675
You can adjust the Nozzle Door for Turf, a Hard Surface,
or the Optional Hose Kit. #21859
Keep hands away from Drive Belt and Sprocket when the
engine is running. #21862
Do not allow people or pets near the machine when it is
operating. #21854
To engage the Drive, squeeze the Clutch Drive Lever
against the Handlebar. #21853