TM 55-2210-223-34
TO 45A2-2-14-22
3-8. DUPLEX AIR GAGE
This task covers:
a.
Removal
c.
Cleaning
e.
Repair
g.
Assembly
b.
Disassembly
d.
Inspection
f.
Test
h.
Installation
INITIAL SETUP
Tools
Material/Parts
Tool kit SC 4940-97-CL-E12
Glass cleaner (Item 3, Appendix B)
Pointer puller
Test Equipment
Portable air gage tester P/N 700-1
REMOVAL
NOTE
Federal Railroad Administration requires annual testing of duplex air gages or
when gage is not operating properly.
Duplex air gage can be tested while installed in control stand using a self-
contained, portable air gage tester. Refer to step 13 below for testing
instructions.
1.
Disconnect four air line connections (1) from duplex air gage (7).
2.
Remove six thumbscrews (2) and remove cover (3).
3.
Remove two light sockets (4).
4.
Remove two bolts (5), lockwashers (6), and duplex air gage (7).
DISASSEMBLY
6.
Pry copper clasp from face of gage and remove front glass cover (8) and expose inner front of dial.
7.
Remove two screws (9) and remove duplex air gage (7) from glass housing (10).
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