18 | BHGE
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B
A
C
Shim
Chuck Jaws
Figure 11: Pilot Base
XIII. Inspection and Part Replacement (Contd.)
Shim
Chuck
Jaws
B
A
C
Figure 10: Pilot Disc
D Min.
B
A
C
.028”(0.71mm)
Figure 9: Seat Step
J
F
G
H
.028”
(0.71 mm)
M
Disc
Holder
Retaining
Ring
Disc
Collar
Disc
Figure 8: Disc Assembly
Table 4: 13900 Turbine Reheater Pilot
Disc and Base Seat Dimensions
Dimension
in.
mm
A
1.512
+
-
.001
.002
38.40
+
-
0.03
0.05
B
1.633
+
-
.002
.001
41.48
+
-
0.05
0.03
C
1.796
±
.001
45.62
±
0.03
D
.484 (min.)
12.29 (min.)
F
1.682
±
.002
42.72
±
0.05
G
1.465
±
.002
37.21
±
0.05
H
.062
±
.005
1.57
±
0.13
J
2.449 (min.)
62.20 (min.)
M
.284 (min.)
7.21 (min.)
