TM 10-4610-241-24
TO 40W4-13-42
3-9.
CENTRIFUGAL PUMP MOTOR (BACKWASH PUMP) REPAIR - continued.
b.
Cleaning.
WARNING
Compressed air can blow dust into the eyes. Wear eye protection. Do
not exceed 30 psi (207 kPa) air pressure.
(1)
Scrape loose paint from fan cover (2), stator (19) and shaft end plate (11). Prime and paint as
necessary.
(2)
Using compressed air, blow dust and grit from stator assembly (19) and shaft of rotor (17). Wipe rotor
shaft with clean wiping rag.
(3)
Wipe bearings (14 and 15) with clean rag.
(4)
Clean vent slots of fan cover (2) with compressed air and wipe with clean rag.
c.
Inspection.
(1)
Inspect leads and windings of stator assembly (19) for evidence of cracked or burned insulation.
(2)
Inspect rotor (17) for chips and cracks.
(3)
Inspect bearings (14 and 15) for wear.
(4)
Inspect shaft end plate (11) and fan end housing (8) for cracks.
d.
Repair.
Replace lockwashers and all damaged or excessively worn components.
e.
Assembly.
(1)
Install eyebolt (18).
(2)
Position bearing retainer plate (16) on long shaft of rotor (17).
(3)
Using arbor press, install bearings (14 and 15) and position seal (12) on long shaft of rotor (17). Install
seal (13) in end plate (11).
(4)
Position pump end plate (11) on long shaft of rotor (17) and secure end plate to retaining plate (16) with
four screws (10).
CAUTION
Wiring inside stator can be damaged by rotor shaft if rotor is not installed
carefully.
(5)
Carefully position rotor (17) with attached end cover (11) in stator (19).
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