3-14. CENTRIFUGAL PUMP MOTOR (DISTRIBUTION PUMP) MAINTENANCE- continued.
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 Replace as required
Using growler check rotor assembly for shorts
Inspect end 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.
If multimeter indication is not 0 ohm for each pair of windings, replace stator assembly (9).
Set multimeter to OHMS X1000 scale. Connect one lead to stator housing. Connect other lead to each
motor lead in turn.
If multimeter indication is not infinity for each motor lead, replace stator assembly (9)
Replace defective components
Pack two bearings (8 and 12) with grease and use arbor press to install bearing (8) on short end of rotor shaft
Install retainer ring (11)
Using arbor press, install bearing (12) on rotor shaft (10)
Install two screws (14) on plate (13).
Stator wiring inside case can be damaged by rotor shaft if rotor shaft is not
installed carefully. Guide rotor shaft carefully while installing it
Insert rotor shaft (10) through stator assembly (9)