SWEEPING SYSTEM
TigerCat, Hydro-Retriever 4500
Service Manual
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MAIN BROOM ADJUSTMENTS
The working height of the main broom is adjustable to compensate for bristle wear. Before adjusting the main
broom height, measure the length of the bristles. The broom should be replaced if the bristles are worn to a
length of 2 inches (5 cm) or less.
To adjust the main broom height...
1
Drive the machine to an area with a level floor and set the parking brake.
2
With the engine still running, put the broom switch in the ON position and the main broom lever in the
SWEEP position. Do not move the machine. Let the main broom run for about 1 minute. This allows the
broom to polish a “strip” on the floor.
3
After 1 minute, release the parking brake and move the machine so that the polished strip is visible. The
polished strip on the floor should be 2-1/2 inches (6.3 cm) wide.
Note: Adjusting the broom for a pattern wider than specified decreases sweeping performance and increases
broom wear.
4
If the polished strip is too wide or too narrow, remove the panel from the left side of the operator’s
compartment (next to the operator’s left leg). The broom adjustment knob is behind this panel, near the
bottom of the broom raise/lower lever. Turn the broom adjustment knob clockwise to make the polished
strip wider or counter-clockwise to make the polished strip narrower.
5
Check the broom pattern again. Continue adjusting until the polished strip is the correct width.
Main Broom Level Adjustment
The broom level adjustment raises or lowers just the left end of the main broom, so that the broom touches the
floor evenly across it’s entire length.
Once the broom is leveled at the factory, further adjustment is seldom necessary. Adjust the broom level only
if the broom pattern (see main broom adjustment) is tapered after installing a new broom.
To adjust the broom level...
1
Install a new broom and check the broom pattern (see Main Broom Adjustment). If the broom pattern is
tapered, go to step 2. If the broom pattern is not tapered, the broom level does not need adjustment.
2
Remove the (7) screws holding the cover at the left end of the broom housing.
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