SCRUB BRUSH SYSTEM
TigerCat, Hydro-Retriever 4500
Service Manual
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GENERAL INFORMATION
The scrub brush system consists of 4 disc-type scrub brushes, 2 gear boxes driven by a hydraulic motor. A
cogged belt transmits power from the motor to the right gear box. A flexible coupler is used to connect the left
gear box to the right gear box. For lubrication, the brush drive gear cases use 140W gear lube.
The brush drive assembly is raised and lowered by a hydraulic cylinder, controlled by a switch on the dash-
board. The brush motor automatically starts when the brushes are lowered and stops when they are raised.
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SCRUB BRUSH BELT REMOVAL
1
Start the engine, put the squeegee switch in the down position and remove the squeegee from the
machine.
2
Put the scrub brush switch in the OFF-position and remove the (4) scrub brushes.
3
Put the scrub brush switch in the ON position and turn the ignition switch OFF.
4
Loosen the 2 “A” nuts (see Figure 1), turn nut “B” counterclockwise and push the motor downward to
release tension on the drive belt.
5
Loosen the (6) “C” set screws and remove the (6) “D” bolts.
6
Pull the (2) gear case coupling disks from between the coupling castings.
7
Work the belt between the coupling castings and out of the machine.
Follow steps in reverse order to re-install belt.
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