UNIT MAINTENANCE INSTRUCTIONS FOR THE
READY/AVAILABLE IF: 20 * Functional
Check (Continued)
CAUTION
CAUTION
CAUTION
CAUTION
Catch the ejected dummy round as it comes out the bottom of the weapon. The round's ogive may become dented if the round is dropped.
7. Press trigger to release bolt forward. Charge the weapon, catching the ejected round. Place thumb safety on 'S' (SAFE).
8. Raise top cover and verify the ammunition is seated firmly against the bolt face and that the round stop pawl protrudes from the bolt face above the seated ammunition.
9. Verify no malfunctions occurred and no
discrepancies were noted during accomplishment of steps 1 through 8.
10. Remove dummy ammunition from the weapon using a cleaning rod section.
11. Install the feed throat and insert a belt of six linked dummy rounds. Verify weapon met requirements of steps 3 through 6 when repeated with the six linked rounds of dummy ammunition.
0039 00-16
Table 1. Preventive Maintenance Checks And Services For The MK 19 Mod 3 Machine Gun – Continued
ITEM
NO. INTERVAL HOURS MAN ITEM TO BE CHECKED
OR SERVICED
PROCEDURE EQUIPMENT NOT
READY/AVAILABLE IF: 20
*
Functional Check (Continued)CAUTION
CAUTION
CAUTION
CAUTION
To prevent dented ogive, catch the ejected dummy round as it comes out of the bottom of the weapon.
12. Remove last dummy round from the weapon, using a cleaning rod section. 13. With rounds removed,
charge the weapon and return charging handles forward and in up position. Press trigger and release bolt. Raise the cover and inspect the bolt face to insure that the firing pin protrudes. 14. Charge the weapon again
and return the charging handles to the forward position, leaving one charging handle down. Press the trigger and release the bolt. Raise the cover and inspect bolt face to insure that the firing pin does not protrude. This procedure is to confirm stoppage of a runaway gun.
TM 9-1010-230-23&P 0039 00
0039 00-17
Table 1. Preventive Maintenance Checks And Services For The MK 19 Mod 3 Machine Gun – Continued
ITEM
NO. INTERVAL HOURS MAN ITEM TO BE CHECKED
OR SERVICED
PROCEDURE EQUIPMENT NOT
READY/AVAILABLE IF:
21 Every 6
months Detailed Technical
Inspection (DTI) (Not for Army use)
WARNING
WARNINGWARNING
WARNING
Appropriate eye protection is recommended when cleaning the weapon and/or its parts. Detail strip, clean, and inspect the weapon. (Training
Commands may establish their own criteria.) A DTI should also be performed if the weapon is immersed in water or is extremely dirty. 22 Every 6
months Bolt Backplate and Assembly (DTI) (Not for Army use)
WARNING
WARNINGWARNING
WARNING
Appropriate eye protection is recommended when cleaning the weapon and/or its parts.
CAUTION
CAUTION
CAUTION
CAUTION
Do not immerse the cam followers, sear buffer, or the assembled bolt buffer assemblies in cleaning solvent. Solvent damages these parts.
Do not lubricate the internal components in the bolt buffer assemblies. Ensure the components are clean, dry, and not lubricated during assembly or excess recoil will result.
1. Detail strip, clean, and inspect the bolt and backplate assembly.
0039 00-18
Table 1. Preventive Maintenance Checks And Services For The MK 19 Mod 3 Machine Gun – Continued
ITEM
NO. INTERVAL HOURS MAN ITEM TO BE CHECKED
OR SERVICED
PROCEDURE EQUIPMENT NOT
READY/AVAILABLE IF:
22 Every 6
months Bolt Backplate and Assembly
(DTI) (Not for Army use) (continued)
2. Replace any parts required. 3. Verify all springs are not
bent, broken, or worn on outer coils. Measure the length of all springs (WP 0057 00).
4. Inspect the mouth of the rods and tubes for burrs. Remove burrs with a stone. Verify rods and tubes are not bent.
NOTE
NOTENOTE
NOTE
Anytime the cam followers or the covers, RH and LH, are removed, install new nylon point set screws, flat head screws, and socket head screws.
Adjust the bolt's timing each time the bolt is detail stripped or any of the following items are installed as new parts: Bolt sear
Sear buffer rod Buffer washers Firing pin Firing pin sear
Lock plate assembly or any of its components.
5. Lubricate and reassemble observing all NOTES mentioned above.
TM 9-1010-230-23&P 0039 00
0039 00-19
Table 1. Preventive Maintenance Checks And Services For The MK 19 Mod 3 Machine Gun – Continued
ITEM
NO. INTERVAL HOURS MAN ITEM TO BE CHECKED
OR SERVICED
PROCEDURE EQUIPMENT NOT
READY/AVAILABLE IF:
23 Every 6
months Receiver Sear
Assembly (DTI) (Not for Army use)
WARNING
WARNING
WARNING
WARNING
Appropriate eye protection is recommended when cleaning the weapon and/or its parts.
CAUTION
CAUTION
CAUTION
CAUTION
Do not mix up the order or position of the components inside the receiver buffer bodies. Improper sequence or position of these components will cause excess recoil with possible parts damage (WP 0051 00).
1. Detail strip, clean, inspect, and lubricate the sear assembly.
2. Replace any parts required.
3. Verify all springs are not bent, broken, or worn on outer coils. Measure the length of all springs (WP 0057 00).
4. Lubricate and reassemble the sear assembly
0039 00-20
Table 1. Preventive Maintenance Checks And Services For The MK 19 Mod 3 Machine Gun – Continued
ITEM
NO. INTERVAL HOURS MAN ITEM TO BE CHECKED
OR SERVICED
PROCEDURE EQUIPMENT NOT
READY/AVAILABLE IF:
24 Every 6
months Other Assemblies
(DTI) (Not for Army use)
1. Clean the other assemblies removing only the parts specified in the
maintenance procedures for each assembly. 2. Inspect for worn, burred,
broken, or missing parts. 3. Discard unserviceable
parts and install new parts as required. 4. Verify all springs are not
bent, broken, or worn on outer coils. Measure the length of all springs (WP 0057 00).
5. Lubricate and reassemble the weapon.
TM 9-1010-230-23&P 0040 00
0040 00-1/(2 blank) UNIT
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)