CENTRIFUGAL PUMP MOTOR (BOOSTER) MAINTENANCE - continued.
Stator wiring inside case can be damaged by rotor shaft if rotor shaft is
not removed carefully. Guide rotor shaft carefully while removing it.
Tap end plate (13) with soft-faced mallet to break bond with stator assembly (9) and remove plate with rotor
shaft (10) attached.
Remove two screws (14) and end plate (13) from rotor shaft (10).
Using arbor press, remove bearing (8) from rotor shaft (10).
Using arbor press, remove bearing (12) from rotor shaft (10).
Remove retainer ring (11).
Compressed air can blow dust into the eyes Wear eye protection Do not
exceed 30 psi (207 kPa) air pressure.
Using compressed air, blow dust and grit from stator assembly (9) and rotor (10) assemblies. Wipe rotor (10)
assembly with clean rag.
Clean fan cover (2) vent slots with compressed air and wipe with clean rag.
Wipe bearings (8 and 12) with clean rag.
Scrape loose paint from fan cover (2), stator assembly (9), and end plate (13).
Inspect leads and windings of stator in stator assembly (9) for evidence of cracked or burned insulation.
Inspect rotor shaft (10) for loose or burned conducting bars.
Using growler check rotor for shorts.
Inspect plates (6 and 13) for cracks.
Using multimeter set to OHMS X1 scale, connect test leads to pairs of motor lead sets 4, 5, and 9 to 1 and 7;
1 and 7 to 2 and 8, 1 and 7 to 3 and 6, and 2 and 8 to 3 and 6.