Main Broom Maintenance - Nilfisk-Advance Advance Retriever 2060 Service Manual

SWEEPING SYSTEM
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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!
The engine must not be running when performing this procedure.
To Rotate or Replace the Main Broom...
1 Turn the Ignition Key Switch (52) OFF.
2 Put the Main Broom Raise / Lower (ON / OFF) Lever (53) in the DOWN position.
3 Open the Main Broom Access Door (15).
4 Remove the large T-Bolt from the side of the broom idler arm. Pivot 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 or adjusted 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 (15).
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 (53)
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) or more than 3 inches (7.62 cm)
wide, the broom needs to be adjusted.
5 See Figure 1. 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 (5) 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, see broom level adjust-
ment.
14 - FORM NO. 56043051 / Retriever ™ 2060
FIGURE 1
A
B