C6, TM9-2350-230-12
Table 13-4. Cleaning and Inspection of 7.62MM Machine Gun M73E1
COMPONENTS
CLEANING AND INSPECTION
CLEANING
NOTE. General cleaning procedures, refer to TM 9-208-1, and TM 9-247.
Barrel Assembly
Remove foreign matter with CR, rifle bore cleaning compound, applied
Bore
to cleaning patches and attached to small arms cleaning rod swab
holder section 7266110 (3, fig. B-6). Use small arms cleaning bore
brush 5564174 (8, fig. B-6) attached to small arms cleaning rod
section 7266109 (2, fig. B-6) to clean any remaining foreign matter.
Cleaning patches are used to wipe the bore clean.
Chamber
Insert small arms cleaning chamber brush 7790452 (7, fig. B-6) into the
chamber and apply a counterclockwise motion to clean the barrel
assembly chamber. CR, rifle bore cleaning compound, may be
used, if necessary.
Back Plate Assem-
Use only clean cloth to remove dirt.
Receiver Assembly
Clean the inside with small arms cleaning receiver brush 7790342 (5,
fig. B-6) and CR, rifle bore cleaning compound. Wipe dry and
apply a light coat of oil.
INSPECTION
Jacket Assembly
with Bearing
Group
Jacket Assembly
Check mounting block for rough spots and cracks. Inspect all parts for
with Bearing
rust, corrosion, and foreign matter. Inspect bearing lock for
staking and bearing for damaged flash hider threads.
Barrel Assembly
Check for bulges, cracks, and rust.
NOTE. A gap between the Stellite liner and the gun tube is allowed
at manufacture to permit heat expansion. This ring approximately
eight inches from rear end of barrel assembly does not reflect a ringed
or bulged bore.
Cover Assembly
Check feed cam for cracks and wear. Check spring action of depressor
and stripper. Check feed slide assembly and feed slide track
assembly for wear or damage. Assure that all pawls, under spring
tension, function properly. Check cover and track assemblies for
wear and damage.
Feed Tray Group
Make certain the cartridge stop assembly is secure to the feed tray
assembly. Check tray for proper fit on receiver assembly.
Guide Rod Assembly Check guide rod assemblies for straightness. Check compression
and Compression
helical spring for cracks and kinks.
Helical Spring
(Driving Spring)
13-7