Pump Action Shotgun Internal Assembly
LUBRICATION - Continued
PINS (OTHER SIDE)
HOLE
WEAR PAD (INSIDE)
LOCK
OGIVE PLUNGER ASSEMBLY (SEE NEXT PAGE)
HOLE
WEAR PAD (INSIDE)
LOCK
PINS (OTHER SIDE)
OGIVE PLUNGER ASSEMBLY (SEE NEXT PAGE)
- FLAT SPRING PIN
BOLT AND BACKPLATE 'ASSEMBLY
DO NOT LUBE INTERNALLY
BACKPLATE TUBES
BOLT AND BACKPLATE 'ASSEMBLY
DO NOT LUBE INTERNALLY

BACKPLATE TUBES
INTERNAL COMPONENTS
SEAR ASSEMBLY
SEAR SHOULDER
CONTACT SURFACES
INTERNAL COMPONENTS
LUBRICATION - Continued
2. Sand and Dust. Brush a generous coat of lubricant on all critical points shown in the illustration. Upon assembly, pack more lubricant into the following areas:
a. Between the round positioning block (1) and forward receiver wall.
b. Between the alignment guide assembly (2) and forward receiver wall.
c. Under the primary pawl (3).
d. Under the charger handle locks and between the charger housing and receiver (4).
f. Inside the sear assembly, under the receiver sear, and inside the sear housing and receiver buffer bodies (6).
g. Between the feed throat plungers and receiver slots (7).
Apply lubrication to exterior surfaces and wipe off with a clean wiping rag.
3. Extreme cold. Subzero weather causes the lubricant to become thicker. In temperatures 0 degrees and below, use LAW after first cleaning all parts to remove previous lubricants. When using LAW, brush on a thin coat, especially on those parts cited in WP 0082 00, step 2. If the metal 'sweats' when the gun is brought indoors, field strip, wipe dry, then allow parts to return to room temperature before lubricating and reassembling.
4. Wet, salty conditions. Preserve and lubricate all surfaces generously to protect parts from rust.
- 1LK305
END OF WORK PACKAGE
DIRECT SUPPORT
MK 19 MOD 3 40 MM MACHINE GUN (NSN 1010-01-126-9063) UPGUNNED WEAPONS STATION MK 19 40 MM MACHINE GUN (NSN 1010-01-362-6513)
MAINTENANCE OF MK 19 MACHINE GUN - BORESIGHTING INSTRUCTIONS
INITIAL SETUP:
Tools and Special Tools
Adapter assembly, 40 mm Boresight kit assembly, 40 mm MK 64 carriage and cradle assembly M3 tripod ground mount Tape measure
Target (see step 1 for fabrication instructions) Traversing and elevating (T&E) mechanism
BORESIGHTING INSTRUCTIONS
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