TM 9-1240-285-34&P
CHAPTER 3
FAULT SYMPTOM INDEX
Fault Isolation Procedure
Symptom
or Maintenance Procedure
Deflection locking mechanism
1.
does not hold deflection
boresight adjusting mechanism
2.
Elevation locking mechanism
does not hold elevation
boresight adjusting mechanism
3. Deflection boresight adjusting
mechanism does not turn
freely (with deflection lock not
set )
4. Deflection boresight adjusting
a.
Tighten ring
mechanism too loose
(Vol II, para 4-13)
b.
Do backlash check
(Vol II, para 5-2)
5.
Elevation boresight adjusting
mechanism does not turn
freely (with elevation lock not
set )
6.
Elevation boresight adjusting
a.
Tighten ring
mechanism too loose
(Vol II, para 4-10)
Do backlash check
b.
(Vol II, para 5-2)
Vol I
