DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE
Section I. REPAIR PARTS, SPECIAL TOOLS AND EQUIPMENT
Special Tools and Equipment
Special tools and equipment necessary to perform
operations described in this manual are listed in table 2-
Repair Parts Repair parts are listed and illustrated in TM
1. Special tool sets of a general nature are authorized by
Maintenance instructions contained
TA and TOE.
herein pertain only to replacement of repair parts
authorized at the direct support and general support
Table 2-1. Special Tools and Equipment
Adapter, Sealing 8-32 UNC-2
Used with gun, sealing 4931-764-8134
To make optical checks when removing
parallax and adjusting for sharp eyepiece
Gun Sealing Hydraulic
Used with adapter 4930-107-4378 to inject
Wrench, Spanner, Adjustable,
Used to remove and replace screws 8590832
and 8624629, retainer 10533426, and studs
8624623 and 8624624.
Section II. TROUBLESHOOTING
Troubleshooting performed by lower levels
maintenance are listed in TM 9-2350-230-12.
Troubleshooting is a systematic means of determining by
symptoms, malfunctions within the instrument.
Adherence to procedures covered herein will materially
reduce the time required to locate trouble and restore the
Table 2-2 lists troubleshooting peculiar to direct support
instrument to normal operation.
and general support maintenance levels.
Table 2-2. Troubleshooting
a. Replace spring (9, fig. 3-2).
Headrest is not held in secured position
a. Plunger not securing headrest.
when placed in bracket.
b. Check support (4, fig. 3-2),
b. Support on headrest not alined with plunger.
straight en if bent
Change 1 2-1