TM 9-2350-230-12, C6
Table 5-1. Troubleshooting-Continued
Malfunction
Probable causes
Corrective action
GUN-LAUNCHER ELEVATING AND
TURRET TRAVERSING SYSTEMS -
Continued
25. Traversing system electric
a. Vehicle MASTER SWITCH not on
drive inoperative with palm
switch depressed.
b. TURRET CONTROL POWER switch
not on.
c. Loose electrical connectors
c. Tighten electrical connectors.
26. Turret will not power traverse
Turret traverse lock engaged
in either direction.
27. Traverse or elevation servo
Excessive load, due to obstructions or
Remove obstructions.
motors overheat during
foreign matter in turret ring gear.
operation.
a. Vehicle MASTER SWITCH not on
not operate with control
handle palm switches de-
b. TURRET CONTROL POWER switch
pressed
not on.
c. Loose wiring harness connections at
POWER ASSIST CUPOLA
29. Cupola sluggish in electrical
Excessive foreign matter in bearing or
power position
ring gear.
30. Power rotation in one direction
Loose connections at control assembly
only with or without pushing
direction switch.
31. No rotation
a. No electrical power
a. Turn cupola control assembly POWER
CAUTION: If humming noise
is heard from motor with
b. Foreign matter in slip ring
b. Remove matter and clean.
POWER switch in ON position
turn to OFF position, and
c. Loose connections at control assembly
notify organizational maintenance.
7.62MM MACHINE GUN
32. Failure to feed
a. Defective link or ammunition
a.
Remove faulty link and/or round.
b. Defective driving stud,
b.
Replace barrel extension assembly.
c. Cover unlatched
c.
Close cover.
d. Feed system improperly loaded
d.
(A, Fig. 3-5) and make sure link
belt is properly looped and is not
kinked.
e.
Gun improperly loaded
e.
33. Failure to chamber
a.
Defective ammunition.(Short-round)
a.
Replace faulty round.
b.
b.
Install belt properly.
c.
Defective driving springs
c.
Replace springs.
d.
Defective cartridge rammer
d.
Replace barrel extension assembly.
e.
Obstruction by foreign substances or
e.
Remove obstructing matter.
material in chamber.
f. Defective rammer actuator roller
f. Replace barrel extension assembly.
5-4