TM 55-6115-491-40
Table 3-2. Detail Inspection Requirements after Cleaning (Sheet 4 of 8)
FIG.
INDEX
METHOD OF
NO.
NO.
NOMENCLATURE
DEFECTS
INSPECTION
REMARKS
3-1
55
Machine flange ("D" or
Cracks, loose bearing liner, distorted
Visual, SIE
Replace if damaged or bearing bore is be-
"F" coding on flange
mounting flange, worn
yond the following limits: 2.4406 to 2.4408
must be matched with
inches (Letter D stamped on part). 2.4405
corresponding bearing
to 2.4406 inches {Letter F stamped on part).
at reassembly
Reidentify if required.
3-1
57
Ball bearing
Replace at each overhaul.
65
3-1
58
Retaining ring
Replace at each overhaul.
3-1
59
Baffle disk
Wear, scoring
Visual
Replace if worn or scored.
64
3-1
60
Rotor assembly
Burned commutator, slip rings, or
Visual
Replace if damaged.
windings, signs of melted solder
Cracked or distorted fan, scored
Visual
Replace if damaged.
bearing seats
Table 3-2. Detail Inspection Requirements after Cleaning (Sheet 5 of 8)
FIG.
INDEX
METHOD OF
NO.
NO.
NOMENCLATURE
DEFECTS
INSPECTION
REMARKS
Rotor assembly
Check bearing diameter of drive and
Air gage
Replace if not within
-Continued
anti-drive ends. Diameter must be
tolerance limits.
1.1812 to 1.1815 on drive end and
1.1809 to 1.1812 for anti-drive end.
Commutator OD less than 2.750
Dimensional
Replace
inches or slip ring OD less than 2.030
inches after turning.
Windings open, shorted or grounded;
Electrical
Para 3-16
weak insulation
3-1
71
Terminal board
Loose or damaged terminals, cracks
Visual
Replace damaged studs;
replace board if
cracked.
Table 3-2. Detail Inspection Requirements after Cleaning (Sheet 6 of 8)
FIG
INDEX
METHOD OF
NO
NO.
NOMENCLATURE
DEFECTS
INSPECTION
REMARKS
3-1
74
Stator housing
Stator mounting set screws loose
Visual
Tighten and stake.
Structural cracks, particularly at
Visual
Replace for major defects.
mounting holes
Damaged threads
Visual
Replace if damaged.
Damaged or overheated windings
Visual
Replace if damaged.
and deteriorated insulation
Lack of continuity, shorted or
Electrical
Para 3-22
grounded; weak insulation
Change 1 3-11
