C 10, TM 9-2350-230-12
TABLE 8-4. TROUBLESHOOTING - CONTINUED
Malfunction
Probable cause
Corrective action
GUN-LAUNCHER MOUNT -
Continued
133. Difficult to adjust
Defective hand pump
Bleed off all pressure and
precharge pressure
replace hand pump (fig. 11-5).
in recoil
mechanism.
134. Gun-launcher recoils
a.
Insufficient fluid in recoil
a.
Notify support maintenance.
with excessive
mechanism due to defec-
force
tive safe-to-fire indicator.
b. Air in recoil mechanism
b. Open bleed valve and bleed
off all pressure, and then
readjust recoil mechanism
135. Gun-launcher returns
Insufficient fluid in or
to battery with
defective buffer
excessive force.
SIGHTING AND FIRE CONTROL
INSTRUMENTS
PERISCOPE XM44 SERIES
136. Loss of boresight
a.
Head assembly not properly
a.
Remove head assembly
seated
b.
Body assembly not seated
b.
Remove body assembly
properly
and check for foreign
matter around locating
keys and keyways and
for burred or broken
locating keys.
c.
Boresight knobs not fully
c.
Check knobs to insure firm
engaged
engagement with clutch
teeth.
137. Flickering image at
a.
Reticle lamp Or rheostat
a.
Replace lamp. Refer to
screen of image
failure
support maintenance to
intensifier tube
replace rheostat.
after stabilization
period
b. Loose or poor electrical
b.
Check and tighten electrical
connection
connections.
137.1. Inability to focus
Image intensifier tube with
Notify support maintenance.
related parts improperly
assembled/installed.
138. Gun and periscope
Link assembly loose
Synchronize and tighten link
not synchronized
adjustment (Fig. 11-43).
8-43