3. Remove thermal protector from test
1. With the temperature of thermal
protector at (77 (25 C). pass a current of 60
F
circuit.
(f) Inspect end bell (16) in accordance with
amperes at 115 vac through protector; contacts must
open between 10 and 20 seconds. Remove current
from protector; within one minute contacts must close.
(g) Inspect fairing (21, fig. 6-15) for cracks
2. Heat thermal protector 290 to 315
and distortion.
F (143.3to 157.2 ); contact must be open.
C
Figure 6-17. Schematic wiring diagram.
CENTERLINE IS NORMAL TO 'A" SURFACE AT
B
C
D
CENTER OF " B" DIAMETER.
7.8968
2.000
1.8505
'C" DIAMETER MUST BE CONCENTRIC WITH
IN.
IN.
IN.
CENTER-LINE
WITHIN
0.003
INCH
TOTAL
7.8978
2.002
1.8510
INDICATOR READING.
"D" DIAMETER MUST BE CONCENTRIC WITH
CENTER- LINE WITHIN 0.001 INCH TOTAL
INDICATOR READING.
Figure 6-18. End bell inspection requirements.
(h) 1)Dimensionally inspect rotor as
(k) Inspect blades of impeller (22. fig. 6-
illustrated in figure 6-19.
15) and outside diameter of hub for nicks, cracks,
(i) Inspect housing assembly (25, fig. 6-15)
erosion. Inspect blade tips and interior of housing 13()1
for evidence of scraping.
in accordance with figure 6-20.
(j) Inspect stator (27, fig. 6-15) for broken
leads. Check the resistance of each coil (fig. 6-17).
Resistance of each coil must be 0.29 to 0.36 ohm.
6-28
