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TM 55-2915-335-30&P
2-18. ARMATURE AND FIELD TUBE ASSEMBLY - lNSPECT/REPLACE (Cont)
2-18
(8)
(9)
Check for shorted armature. Place one mul-
timeter probe on the laminations, point H.
Place the opposite probe at points J. Check
each commutator section for continuity. If
any reading shows continuity, replace the ar-
mature.
Check for open commutator sections. Check
from point K to point L of each commutator
pair for continuity. Check each commutator
pair. Check both commutators. If an open
commutator pair is found, replace the arma-
ture.
b. Inspect Field Tube Assembly
(1)
(2)
Inspect field tube magnets for chips or cracks.
Replace if magnets are chipped or cracked.
Check magnets for loose bonding to field
tube. If loose, replace field tube.
c. Inspect Impeller (Paragraph 2-19)
5. INSTALL IMPELLER AND ARMATURE
NOTE
If impeller and armature have key-type
drives, apply dab of grease to square key.
Insert key into keyway of impeller drive
boss.
NOTE
If impeller and armature have key-type
drives, pump cover and inlet seal must be
in place before impeller is installed. See
paragraph 2-21 for pump cover and inlet
seal installation.
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2-60
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