Nilfisk-ALTO SR 1900 16 / English, Main Broom Maintenance, To Rotate or Replace the Main Broom

A-16 / ENGLISH

MAIN BROOM MAINTENANCE

Since the Main Broom Motor always turns in the same direction, the bristles on the broom eventually become curved, reducing sweeping performance. Sweeping performance can be improved by removing the broom and turning it around (end-for-end). This procedure, known as “rotating” the main broom, should be done once every 15 hours of operation. NOTE: This procedure does not apply to the optional chevron broom.

The main broom should be replaced for optimal performance when the bristles are worn to a length of 2 inches (5.08 cm). The main broom stop must be re-adjusted when the broom is replaced. NOTE: The main broom is functional to a bristle length of 1/2 inch (12.7mm)

NOTE: The machine should be stored with the Main Broom in the raised position.

WARNING!

The engine must not be running when performing this procedure.

To Rotate or Replace the Main Broom...

1Turn the Ignition Switch (TT) OFF.

2Put the Main Broom Lever (B) in the DOWN position.

3Open the Right Side Main Broom Access Panel (18).

4See Figure 1. Pivot the Idler Arm Assembly (A1) out of the main broom core. NOTE: The Idler Arm is held in place by the Right Side Main Broom Access Panel (18).

5Pull the Main Broom (A2) out of the broom housing and remove any string or wire wrapped around it. Also inspect the skirts at the front, back and sides of the broom housing. The skirts should be replaced or adjusted if they are torn or worn to a height of more than 1/4 inch (6.35

mm)off the ground.

6Turn the broom around (end-for-end) and slide it back into the broom housing. Make sure that the lugs on the broom core (left side) engage the slots in the broom drive hub and that the broom is fully seated.

7Swing the idler arm assembly back into the broom core. NOTE: Make sure the lugs on the idler arm engage the slots in the broom core

8Close and latch the Right Side Main Broom Access Panel (18).

To Adjust the Main Broom Height...

1Drive the machine to an area with a level floor and set the parking brake.

2Pull the Main Broom Lever (B) back and slide to the right and up to lower the main broom. DO NOT move the machine.

3Lightly press the Drive Pedal (G) to start the main broom and let it run in place for 1 minute. This allows the broom to polish a “strip” on the floor. After 1 minute, raise the broom, release the parking brake and move the machine so that the polished strip is visible.

4Inspect the polished strip on the floor. If the strip is less than 2 inches (5.08 cm) or more than 3 inches (7.62cm) wide, the broom needs to be adjusted.

5To adjust, loosen the Knob (C) and slide forward or backward to lower or raise the Main Broom. The farther the Lever (B) travels forward in the slot, the lower the Main Broom will be. Tighten Knob (C) after adjusting the position of the stop bracket.

6Repeat steps 1-5 until the polished strip is 2-3 inches (5.08-7.62cm) wide.

The width of the polished strip should be the same at both ends of the broom. If the strip is tapered, move the machine to a different area and repeat steps 1-5. If the polished strip is still tapered, contact your Nilfisk-Advance Dealer for service.

A-16- FORM NO. 56041656 - Exterra™ / SR 1900