Operating instructions
MAINTENANCE 
CADET 86038220 03/16/07 
4-3 
!
  WARNING: 
ONLY QUALIFIED 
MAINTENANCE 
PERSONNEL ARE TO 
PERFORM THE FOLLOWING REPAIRS. 
VACUUM MOTOR REPLACEMENT 
1.  Turn off all switches and unplug machine. 
2. Remove recovery tank. 
3.  Remove the (2) screws that fasten the solution tank to 
the frame, and tilt tank back to expose the inside of the 
frame. 
4.  Locate the vacuum motor wires and disconnect at the 
connector. Close the solution tank. 
5.  Remove the (6) screws holding the vacuum motor cover 
(p/n 27809) to the solution tank. 
6.  Remove the vacuum motor. 
7.  Reverse process to install vacuum motor. 
Vacuum Motor Carbon Brushes Replacement (Windsor) 
WARNING: The green 
ground wire must be 
attached for safe operation. 
See wiring diagram. 
End Cap 
Carbon 
Brushes 
If armature commutator is grooved, extremely pitted or not 
concentric, the motor will need to be replaced or sent to a 
qualified service center. 
Important: 
These brushes wear quicker as the length shortens due to 
increased heat. Spring inside brush housing will damage 
motor if brushes are allowed to wear away completely. 
Periodically check the length of the carbon brushes. Replace 
both carbon brushes when either is less than 3/8" (9.5mm) 
long. 
3
8
 [9.5mm]
Important: 
These brushes wear quicker as the length shortens due to 
increased heat. Spring inside brush housing will damage 
motor if brushes are allowed to wear away completely. 
Periodically check the length of the carbon brushes. Replace 
both carbon brushes when either is less than 3/8" (9.5mm) 
long. 
3/8 (9.5mm) 
Vacuum Motor Carbon Brushes Replacement (Ametek) 
Note: When replacing carbon brushes loosen wire terminal 
BEFORE removing screws on bracket. 
Note: 
Place 
stop in 
groove. 
Wire
Terminal
WARNING: The green 
ground wire must be 
attached for safe operation. 
See wiring diagram. 
End Cap 
Carbon 
Brushes 
Wire Terminal 
If armature commutator is grooved, extremely pitted or not 
concentric, the motor will need to be replaced or sent to a 
qualified service center. 










