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Page Title:
Section III. PREVENTIVE MAINTENANCE SHECKS AND SERVICES |
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 TM 9-6920-361-13&P
Section III. PREVENTIVE MAINTENANCE SHECKS AND SERVICES
dust or sand, extremely wet terrain, moist or salty
3-5.
General.
atmosphere, or in rain or snow, it will be necessary
to perform the maintenance services more frequently.
a. To insure that the 14.5-mm field artillery
b. The general preventive maintenance
trainer M31 or subcaliber device is ready for operation at
services outlined below will be observed, in addition to
all times, it must be inspected systematically so that
those referred to in table 3-1.
defects may be discovered and corrected before they
(1) Check to see that the trainer is
result in serious damage or failure. The necessary
correctly assembled, and no parts or components are
preventive maintenance checks and services to be
missing.
performed are listed in table 3-1. Defects discovered
(2) Inspect for loose, broken, or damaged
during operation of the unit will be noted for future
parts. Tighten loose parts.
correction, to be made as soon as operation has ceased.
(3) Each time the trainer is disassembled
Stop operation immediately if a deficiency is noted which
for cleaning or repair, carefully inspect all parts for
would damage the equipment if operation were
cracks, excessive wear, rust, and like defects which
continued. All deficiencies and shortcomings will be
might cause malfunctions.
Clean all parts before
recorded, together with the corrective action taken, on
assembly.
DA Form 2407 at the earliest opportunity. The frequency
of the preventive maintenance services prescribed is
3-6.
Operator's Preventive Maintenance The item
considered a minimum requirement for operation of the
materiel under usual conditions.
Under unusual
or points to be inspected and serviced by the operators
operating conditions, such as extreme temperatures,
are listed in table 3-1.
Table 3-1. Preventive Maintenance Checks and Services
B - Before firing
D - During firing
A - After firing
Item
Interval
Procedure
Work time
BD
A
(M, H)
Barrel assembly
x
x
x
See that bolt lock plunger properly engages the
0.1
breech bolt.
x
x
x
Check bolt for smooth operation.
x
x
x
Check safety for proper operation.
x
x
x
Check trigger for proper functioning.
Barrel
x
Insure that bore is free of all residue by use of
0.2
bronze cleaning brush.
x
Wipe bore clean and dry.
x
Clean barrel with bronze cleaning brush after
each 15 cartridges.
x
Clean barrel.
Mount assembly
x
x
x
Insure that trunnion caps hold barrel assembly
0.1
securely.
x
Check elevating handwheel for smooth operation.
x
Check traversing handwheel for smooth operation.
x
Check for broken level vials.
x
Insure that gears disengage properly for rapid
elevating and traversing of trainer.
x
x
Insure that mount assembly is mated to the tripod
securely.
Telescope socket
x
Check telescope socket for secure retention of
0.1
assembly
telescope socket assembly.
Tripod mount
x
x
Check leg locking levers. They must hold the legs
0.1
assembly
securely in place.
x
x
Check mount locking screw for secure retention
of the mount assembly.
Change 1 3-3
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