Sweep System, Main Broom 187Service Manual – SW8000Inspect and Adjust the Broom HeightThe main broom has 2 operating positions; Float (7) and Sweep (6). In the Float position, the height isleft uncontrolled (floating) and the pressure on the broom is primarily determined by the weight of themechanism. Due to the weight of the mechanism, operating the broom in Float mode for extended periodscan result in excessive wear of the broom. In Sweep mode, the height of the broom is limited by theadjustment knob (4) to reduce wear on the broom.The main broom adjustment knob (4) must be re-adjusted as bristle material is worn down and when thebroom is replaced. Determining whether the broom height needs to be adjusted involves examining thecontact area under the broom.1. Drive the machine to an area with a level floorand set the parking brake. (Preferably an areawith a dirty floor that will show contact from thespinning broom.)2. Leave the engine running.3. Move the Main Broom Lever (5) forward to theSweep position (6).4. Without actually moving the machine, lightlypress the drive pedal out of the neutral positionjust enough to engage the broom. This allows thebroom to polish a “strip” on the floor.5. Raise the broom, release the parking brake, andmove the machine so that the polished strip isvisible.6. Inspect the polished strip on the floor. The targetwidth is between 2 and 3 inches (50 to 80 mm).• If the strip is less than 2 inches (50 mm) wide,lower the broom by loosening the knob (4) andsliding it forward.• If the strip is more than 3 inches (80 mm) wide, raise the broom by loosening the knob (4) and slidingit back towards you.7. Repeat the procedure to verify the settings.Inspect Housing SkirtsVisually inspect the skirts when rotating or replacing the main broom. The skirts should be replaced oradjusted if they are torn or more than 1/4 inch (6.35 mm) above the floor.4657
