REPLACING THE PUMP MOTOR (18006)
1. Turn all switches OFF and UNPLUG the unit.
2. Remove the Door (10606). Using a #2 Phillips Screwdriver remove (4) 10-24 Bolts (10150) attaching the
Door to the Solution Tank.
3. Disconnect the Yellow Wire marked “P”, Black Wire and Green (Ground) Wire.
4. Using Side Cutters (Dikes) cut through 5/16 Clamp (10043) that connects the Solution Hose (10238) to
the Brass Elbow (18211).
5. Install rebuilt or new Pump Assembly (4PUM) or (4PUM-A).
NOTE: Ensure Ground (Green) Wire is reconnected.
REMOVING THE BRUSH ASSEMBLY (18210)
1. Remove Belt Cover (10100). Using a #2 Phillips Screwdriver remove (2) 6-32 Bolts (10026 / 10230).
2. Disconnect Belt (10011) from Pulley (10009). With thumb and index finger pull Belt toward yourself and
down, rotating Belt off the Pulley.
NOTE: The Pulley (10009) on some units may have a flange. Using Pliers remove the flange and throw it
away. This will enable the Belt to be removed.
3. Remove the Brush Bracket (10016). Using a #2 Phillips Screwdriver remove (1) 10-24 Bolt (10150).
Using a 3/8 Nut Driver remove (1) 10-24 Hex Nut (10273).
4. Lift up on the Pulley (10010) side of the Brush Assembly (18210) to rotate out of the Brush Housing
(10001).
REBUILDING THE BRUSH ASSEMBLY (18210)
1. Remove the Brush Pulley (10010) by removing (2) Set Screws (10276) using a 5/64 Allen Wrench.
NOTE: First use a Heat Gun or Torch to expand the Pulley, making it much easier to remove the Set Screws
and slide the Pulley off the Shaft (10012). NOTE: When reassembling the Pulley add a drop of Light Duty
Thread Locker to Set Screws. Align Pulley Set Screws and the Shaft dimples. Without rotating the Pulley,
slide it onto the Shaft until only the chamfered edge of the Shaft is sticking through the Pulley. Tighten
only (1) Set Screw. Turn the Pulley back and forth. The Set Screw should rock in the dimple but it should
not rotate. If it rotates, it is not in the dimple and should be reset. Once in dimple, tighten second Set
Screw.
2. Remove Bearing Assemblies (18016).
3. Clean and inspect Bearing Assemblies, removing any hair and dirt. NOTE: If Bearing (10017), Bearing
Block (10195), or Brush Core Washer (10183) are worn or damaged, replace them.
4. Inspect the ends of the Brush Shaft (10012) for dirt or corrosion buildup. Clean with low abrasive emery
cloth and oil.
5. Inspect Brush (10013) for wear, replace if necessary.
REPLACING THE FRONT NOZZLE CLIP (10031)
1. Turn all switches OFF and UNPLUG the unit.
2. Using a #2 Phillips Screwdriver remove (3) 8-32 Bolts (10274) attaching Front Nozzle Clip (10031) to
Brush Housing (10001).
3. Remove Front Nozzle Clip from Brush Housing.
4. Scrape away any remaining silicone from the inside of the Brush Housing Vacuum Nozzle.
5. Apply a thin bead of silicone to the new Vacuum Nozzle Clip outer surface that touches the inside of the
Brush Housing Vacuum Nozzle.
6. Insert Front Nozzle Clip into Vacuum Nozzle.
7. Add a drop of heavy-duty thread locker to the (3) threaded inserts in the Front Nozzle Clip.
8. Thread (3) Bolts into Front Nozzle Clip threaded inserts.
9. Wipe away excess thread locker and silicone from the outside and inside of Vacuum Nozzle.
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