REPAIR MANUAL
REMOVING THE VACUUM AND BRUSH ASSEMBLIES
1. Turn all switches OFF and UNPLUG the unit.
2. Remove Door (10606). Using a #2 Phillips Screwdriver remove (4) 10-24 Bolts (10150) attaching Door to
Solution Tank.
3. Disconnect the (2) Blue Wires marked “V”, (2) Red Wires marked “B” and (3) Green (Ground) Wires.
4. Using a 5/16 Nut Driver unscrew the Duct Clamp (10071) then disconnect the Duct Cuff (10077).
NOTE: On older C-4 machines the Duct Clamp cannot be accessed from the back of the unit. The Clamp
will have to be removed after the Brush Assembly is laid forward and the Vacuum Assembly has been
pulled up and forward.
5. Remove the Exhaust Tube C4:(10101) C4-A:(10608).
6. Disconnect the Brass Plug (10038) and Coupler (10037) and Vacuum Cuffs (10070 / 10075).
7. Remove the Brush and Vacuum Assemblies. Using a #2 Phillips Screwdriver remove (3) 10-24 Bolts
(10150) and using 3/8 Nut Driver remove the (1) 10-24 Nut (10273) attaching the Brush Assembly to the
Solution Tank. Next using a #3 Screwdriver remove the (4) ¼-20 Bolts (10178), remove the Duct Strap
(10076). Next lift the Brush Assembly up to clear the Stud (10187) then lay assembly forward. Lift the
Vacuum Motor Assembly out of the unit. Now the Brush Assembly can also be removed.
NOTE: On Model C4-A machines, re-silicone the inner surface of the Exhaust Tube (10608) that touches the
Vacuum Motor (18007) Exhaust Port before reassembling the unit.
REPLACING THE VACUUM MOTOR (18007)
1. Turn all switches OFF and UNPLUG the unit.
2. See (Removing Vacuum and Brush Assembly).
3. Remove the Vacuum Motor (18007) from the Duct (10073). Using 2 wrenches with 7/16 sockets unscrew
the (3) ¼-20 Nuts (10137) and ¼-20 Bolts (10063).
NOTE: When reassembling the Vac Motor Assembly make sure the washers are replaced in the correct
location. (See Parts Diagram)
NOTE: Do not over tighten the Nuts (10137). This may result in cracking the Vacuum Motor.
NOTE: Inspect all wires and hoses for damage before reassembling unit.
NOTE: Before reassembling the unit, all components should be cleaned.
NOTE: While the unit is apart the Brush Assembly should be inspected.
NOTE: Ensure ground (green) wires are reconnected.
REPLACING THE BRUSH MOTOR (18005)
1. Turn all switches OFF and UNPLUG the unit.
2. See (Removing Vacuum and Brush Assembly).
3. Disconnect the Brush Motor (18005) Ground (Green) Wire, using the 5/16 Nut Driver remove (1) 10-32
Bolt (10152), from the Housing Brush (10001).
4. Using 5/16 Nut Driver remove the top (2) 10-24 Bolts (10190) holding down the (2) Brush Motor Straps
(10008).
NOTE: Do not remove the bottom (2) Bolts holding down the Brush Motor Straps.
5. Bend both Straps up. Tilt the Pulley side of the Brush Motor down to slip pulley out from under the
Belt (10011).
NOTE: While the Brush Motor is out, inspect the Belt (10011) and Bearing Block Assemblies (18016).
Remove any hair or dirt. (See Rebuilding Brush Assembly).
NOTE: Show extra care when threading bolts into the aluminum Brush Housing, to avoid cross threading.
NOTE: Inspect all wires and hoses for damage before reassembling unit.
NOTE: Before reassembling the unit all components should be cleaned.
NOTE: Ensure green (ground) wires are reconnected.
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