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)
Step 2.
Inspect for structural damage to tripod leg assembly.
a. Extend and retract spade (1).
b . I f a c t i o n i s n o t s m o o t h , w i t h n o e v i d e n c e o f b i n d i n g , r e p l a c e l eg
a s s e m b l y.
c. Remove four screws (2), pivot cap (3), and leg assembly (4).
d. Apply a film of silicone grease, MIL-S-8660, item 7, Appendix C, to
pivot pin of a new leg assembly (4).
e. Wipe excess grease from the leg assembly using a clean cloth.
f. Position leg assembly (4) by base (5) and install rectangular nut (6)
and pivot cap (3) under pivot pin located on upper portion of leg
assembly using four screws (2).
2-22
