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 TM 9-6920-361-13&P
Table 5-1. Consumable Supplies
NSN
Description
GREASE, AIRCRAFT AND INSTRUMENT: MIL-G-23827
8 oz tube
1 lb can
5 lb can
35 lb pail
GREASE, AUTOMOTIVE AND ARTILLERY: MIL-G-10924
1 lb can
55 lb can
35 lb pail
GREASE, GRAPHITE SOFT: grade 1, V-G 671
1 lb can
5 lb can
GREASE, MOLYBDENUM DISULFIDE: liquid, MIL-G-21164
14 oz cartridge
1 lb can
5 lb can
Section II. TROUBLESHOOTING
Each malfunction stated is followed by a list of probable
5-4. General. This section provides information useful
causes of the trouble.
The corrective action
in diagnosing and correcting unsatisfactory operation or
recommended is described opposite the probable cause.
failure of the trainer or subcaliber device which is
For troubleshooting procedures performed by lower
peculiar to direct support maintenance operation only.
levels of maintenance, refer to tables 3-2 and 4-1.
Malfunctions which may occur are listed in table 5-2.
Table 5-2. Troubleshooting
Malfunction
Probable cause
Corrective action
Breech bolt does not slide
Bolt damaged or burred
Remove burs or replace breech
smoothly
bolt.
Safety inoperative
Safety detent ball bearing
Replace ball bearing.
damaged
Safety detent ball bearing
Replace spring.
spring weak
Failure to elevate
Barrel trunnion damaged
Replace barrel trunnion and re-
or bent
ceiver assembly.
Elevating bevel gear or worm
Remove burs or replace gears.
gear stripped or burred
Elevating bracket shaft bent
Replace shaft.
Elevating worm gear bracket
Replace bracket.
worn or damaged
Failure to traverse
Traversing worm gear or worm
Remove burs or replace gears.
wheel gear stripped or burred
Traversing shaft bent
Replace shaft.
Rapid traverse lever damaged
Replace lever.
Rapid traverse lever fails
Broken torsion helical spring
Replace spring.
to lock in place.
5-2
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