TM 9-2350-230-12, C9
Table 4-1. PREVENTIVE-MAINTENANCE CHECKS AND SERVICES
INTERVAL AND
SEQUENCE
B - BEFORE OPERATION D - DURING OPERATION A - AFTER OPERATION
REFERENCE
B
D
A
ITEM TO BE INSPECTED
PROCEDURE
152MM GUN-LAUNCHER
WARNING: Clear weapon before starting inspection.
44.1 67.2
118.1
Detent Assembly
Notify Organizational Maintenance to service detent
and Check Valve
each 40 rounds and check valve each 100 rounds.
45
119
Electrical Lead
Check for positive connection
119.1
Gun-Launcher
After firing, gun-launcher tube must be cleaned daily
Tube
(M81 tubes must also have bore evacuator valves
and chamber cleaned daily).
46
68
120
Breech Mechanism
a.
Open and close breech both manually and electrically to
Assembly
assure smoothness of operation and that no binding
exists. Check the fully closed position for alignment
of scribe marks on breech chamber with index mark
on coupling.
b.
On the opening cycle, check operation of missile cap
D, E, Fig.
ejector when ejector trigger lever is in the eject (down)
position. Just prior to ejection, check missile case
detent in gun tube chamber to insure it is completely
withdrawn. At full open breech position, the detent
should protrude into chamber.
46.1 68.1
120
CO2 Bore Scavenging
After each 10 rounds, check CO2 bottle weight
System
47
121
Obturator Seal
Check to insure seal is not damaged and is in proper
Fig. 5-101
Table5-8.1
CAUTION: When firing conventional ammo clean
firing probe every 5-10 rounds .
47.1 68.2
Firing Probe
Clean probe with rough cloth or steel wool (FSN 5350-
NOTE. Every 200 conventional rounds interval, notify
organizational maintenance to remove, clean, and inspect
probe and seal seat on breechblock face.
CLOSED BREECH SCAVENGING SYSTEM
47.2
CBS Pressure Gage
a. Check pressure gageIf pressure is below 2700 PSI
and System
start vehicle engine and operate compressor to charge
Operation
system to 3100 + 100 PSI.
CAUTION: Avoid damage to air cylinders, which are
under very high pressure.
b.
Momentarily actuate manual discharge lever to check
operation of system.
121.1
a.
Inspect compressed air lines, oil lines and mounting
hardware for loose connections or leakage. Notify
organizational maintenance to correct defects.
b.
Clean finned tubes and fan screen as required.
c.
Inspect cooling tubes for distortion, cracks, dents and
loose connections. Inspect fan for dents, bent blades,
looseness or other defects. Notify organizational
maintenance to correct defects.
4-8