TM 10-4610-240-24
TM 0850C-24/2
TO 40W4-13-22
3-10. CENTRIFUGAL PUMP MOTOR( RAW WATER PUMP) MAINTENANCE - continued.
c Clean fan cover vent (1) slots with compressed air and wipe with clean rag
d Wipe bearings (11 and 14) with clean rag
INSPECTION.
a. Inspect leads and windings of stator assembly (17) for evidence of cracked or burned insulation.
b. Inspect rotor assembly for loose or burned conducting bars
c. Using growler check rotor assembly for shorts
d. Inspect bearings for wear
e. Inspect end plates for cracks
f. Inspect bushings for cracks or brittleness
g. Using multimeter set to OHMS X1 scale, connect test leads to pairs of motor leads in the following order
T1 and T2, TI and T3, T2 and T3.
h. If multimeter indication is not 0 ohm for each pair of windings, replace stator
i. Set multimeter to OHMS X1000 scale. Connect one lead to stator housing Connect other lead to each
motor lead in turn.
j. If multimeter indication is not infinity for each motor lead, replace stator.
REPAIR.
Replace damage component
ASSEMBLY.
a Pack two bearings (11 and 14) with grease and use arbor press to install bearing (11) on fan end shaft of
rotor (12).
b Install wavy washer (10) and flat washer (9) on fan end shaft of rotor (12).
c. Position fan end plate (18) Aline marks on end plate and stator assembly (17) made during disassembly
d. Install and press bearing retainer (13), bearing (14), and two screws (16) on pump end plate (15).
CAUTION
Wiring inside stator can be damaged by rotor or shaft if rotor is not
installed carefully
e Install rotor (12) in stator assembly (17) with rotor shaft through fan end plate (18)
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