40 - FORM NO. 56041420 / SR 1600
A
B
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 30 hours of operation.
The main broom should be replaced when the bristles are worn to a length of 2-1/2 inches (6.35 cm). The main broom stop must be re-adjusted when the broom
is replaced.
NOTE: The machine should be stored with the Main Broom in the raised position.
WARNING!
Turn the Key Switch (Main Power) (4) to the OFF position and disconnect the batteries before performing this procedure.
To Rotate or Replace the Main Broom...
1
Turn the Key Switch (4) OFF and depress the Emergency Quick Disconnect (1).
2
Put the Main Broom Raise / Lower (ON / OFF) Lever (15) in the DOWN position.
3
Open the Main Broom Access Door (33) by releasing both latches and pulling the door outward before swinging it open.
4
Remove the large T-Bolt from the side of the broom idler arm. Pull the idler arm assembly out of the main broom core.
5
Pull the main broom 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 if they are torn or worn to a height of more than 1/4 inch (6.35 mm) off the ground.
6
Turn the broom around (end-for-end) and slide it back into the broom housing. Make sure that the lugs on the broom drive hub (left side) engage the slots
in the broom core.
7
Swing the idler arm assembly back into the broom core and re-install the T-Bolt that holds the idler arm in place.
8
Close and latch the Main Broom Access Door (33). NOTE: Make sure that both latches are secure.
To Adjust the Main Broom Height...
1
Drive the machine to an area with a level floor and set the parking brake.
2
Pull the Main Broom Raise / Lower (ON/OFF) Lever (15) back and slide to the left and up to lower and start the main broom. DO NOT move the machine.
3
Let the main broom 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.
4
Inspect the polished strip on the floor. If the strip is less than 2 inches (5.08 cm) wide, the broom needs to be adjusted.
5
To adjust, loosen the Handle (A) and slide the Stop Bracket (B) up or down to lower or raise the Main Broom. The farther the Lever (15) travels up in
the slot, the lower the Main Broom will be. Tighten Handle (A) after adjusting the position of the Stop Bracket (B).
6
Repeat steps 1-5 until the polished strip is 2 inches (5.08 cm) 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 Dealer for service.
