TM 5-6675-250-20
2 - 1 0 . T R O U B L E S H O O T I N G ( C o n t i n u e d )
Table 2-3. Troubleshooting (Continued)
M A L F U N C T I O N
TEST OR INSPECTION
CORRECTIVE ACTION
GYROSCOPIC REFERENCE UNIT (GRU) (Continued)
k. Install washer (12) on bolt (10) and insert bolt (10) thru clamps (13
and 6) and base (11) into rectangular nut (9).
N O T E
Final adjustment of bolt (10) is performed at installation of GRU into tripod.
l. Install GRU (5) into tripod base (11).
m. Secure each lower clamp (6) to GRU with screw (4).
n. Slide GRU to approximate center of base (11) and rotate bolt (10) to
tighten clamps.
o. Install locking arms (7) so that arm is approximately tangent to GRU
housing, when clamps are tight.
p. Apply MIL-S-22473 Grade N, Form R primer, item 5, Appendix C, to
threads of screws (14), and allow to dry 5 seconds. Apply MIL-S-46163,
Grade N, Type II, locking sealant, item 2, Appendix C , to the first few
threads of screws. Install screws (14).
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