Universal Pintel Adapter

1 Install flat washer (8), mount pintle (7), and flat washer (6) on yoke (4). Secure with new self-locking nut (5).

2 Install carriage assembly (3) on yoke (4). Install two machine screws (2) and secure with two new self-locking nuts (1).

M122 PintleMachine Disassembly Instructions

14-8. CARRIAGE ASSEMBLY AND DEPRESSION STOP ASSEMBLY—MAINTENANCE INSTRUCTIONS

THIS TASK COVERS:

a. Disassembly b. Inspection/Repair c. Reassembly

INITIAL SETUP

Tools and Special Tools

Small Arms Repairman Tool Kit (item 2, appx B) Small Arms Shop Set (item 1, appx B)

Materials/Parts

Loctite (MIL-S-22473)

Equipment Conditions

14-7 Carriage assembly removed

DISASSEMBLY

Remove three hexagon capscrews (6) and remove depression stop assembly (4). Remove continuous stud (5) from depression stop assembly (4).

M122 Tripod

With an open end wrench hold straight shaft (9) by placing the wrench on wrench flats of straight shaft. Remove hexagon capscrew (7) and flat washer (8) from straight shaft (9). While supporting rear slider assembly (10) with one hand, pull straight shaft out through rear brace support (11).

M122 Tripod

NOTE

Before removing the shock absorber assemblies from the machine gun cradle, note that the concave side of the two spring tension washers (18) face the slide assemblies. Also note the notched cutout on the link deflectors (28) and its position to the inside and front of the machine gun cradle when configured for the M2.

Steps 3 thru 6 are written and illustrated for one shock absorber assembly but apply to both.

3 Remove three machine bolts (14) from side of machine gun cradle (15). With an open end wrench hold straight shaft (21) by placing the wrench on wrench flats of straight shaft. Remove hexagon capscrew (16) and flat washer (17). Remove spring tension washer

(18), which is between front slide assembly

(19) and machine gun cradle. Remove shock absorber assembly (20).

4 Pull straight shaft (21) out through shock absorber mounting bracket (22).

5 Remove four machine screws (27) and link deflector (28) from shock absorber mounting bracket (22) and mount deflector (29). Unscrew front slide assembly (19) from shock absorber (30) and remove mount deflector. Unscrew shock absorber mounting bracket from shock absorber.

M122 TripodBroken Shock AbsorberM122 Tripod

14-8. CARRIAGE ASSEMBLY AND DEPRESSION STOP ASSEMBLY—MAINTENANCE INSTRUCTIONS (cont)

DISASSEMBLY (cont)

6 Remove two hexagon plain nuts (31) from two setscrews (32). Remove setscrews from machine gun cradle (15).

INSPECTION/REPAIR

1 Inspect for broken, damaged, or missing parts.

2 Repair is by replacement of authorized parts (appx C).

REASSEMBLY

1. Adjustment of shock absorber stops:

a. Rotate shock absorber assemblies (4) to the up position, and install quick release pin from yoke assembly (not shown).

b. Install two setscrews (1) into machine gun cradle (2) until setscrews contact shock absorber surface.

c. Install two hexagon plain nuts (3) on setscrews. Ensure nuts are flush with setscrews.

d. Back off setscrews between 1/4 and 1/2 turn, and tighten nuts clockwise to lock in place.

Machine Gun Deflector Link

NOTE

When installing the shock absorber assemblies in the machine gun cradle, ensure the concave side of the two spring tension washers face the front slide assemblies. Also ensure the notched cutout on the link deflectors is positioned to the inside and front of the machine gun cradle when configured for the M2.

Steps 2 thru 6 are written and illustrated for one shock absorber assembly but apply to both.

2 Screw shock absorber (4) on shock absorber mounting bracket (5). Install mount deflector (6) on shock absorber. Screw shock absorber into front slide assembly (7). Install link deflector (8). Apply Loctite to four machine screws (9) and install screws in shock absorber mounting bracket and mount deflector.

3 Slide mounting bracket (13) and spring tension washer (14) onto straight shaft (12).

4 Install straight shaft (12) with assembled parts through rear of shock absorber mounting bracket (5) and front slide assembly (7).

Machine Gun Tripod PartsM122 Tripod

14-8. CARRIAGE ASSEMBLY AND DEPRESSION STOP ASSEMBLY-INSTRUCTIONS (cont)

REASSEMBLY (cont)

5 Install shock absorber assembly (15) into machine gun cradle (2).

6 Install flat washer (16) on hexagon capscrew

(17). Install hexagon capscrew through front of machine gun cradle (2). Install spring tension washer (18) on hexagon capscrew and screw hexagon capscrew into front slide assembly (7). Ensure shock absorber mounting bracket (5) is properly positioned before tightening. With and open end wrench, hold straight shaft by placing wrench on wrench flats of the straight shaft and tighen capscrew (17). Apply loctite to three machine bolts (19) and install machine bolts through side of machine gun cradle and into mounting bracket (13).

7 Install rear slider assembly (23) in machine gun cradle (2) with the mounting hole down and to the rear. Support rear slider assembly with one hand while installing straight shaft through rear brace support (24) and rear slider assembly. Install flat washer (25) and hexagon capscrew (26) on straight shaft (22). With and open end wrench, hold straight shaft (22) by placing wrench on wrench flats of the straight shaft and tighen capscrew (26).

NOTE

Slotted end of continuous stud should point down and toward rear of machine gun cradle.

Apply loctite to three hexagon capscrews (27). Install hexagon capscrews from inside of machine gun cradle (2) in depression stop assembly (30) on outside of cradle. Insert continuous stud (29) into depression stop assembly (30) and secure.

NOTE

Do not disassemble depression stop assembly beyond removal of the continuous stud.

-MAINTENANCE

Pintle Adapter AssemblyPintle Adapter AssemblyPintle Adapter Assembly

14-9. UNIVERSAL PINTLE ADAPTER, TRAVERSE ARM ASSEMBLY, AND UNIVERSAL PINTLE ADAPTER BODY ASSEMBLY—MAINTENANCE INSTRUCTIONS

THIS TASK COVERS:a. Disassembly b. Inspection/Repair c. Reassembly

INITIAL SETUP

Tools and Special Tools

Small Arms Repairman Tool Kit (item 2, appx B) Small Arms Shop Set (item 1, appx B)

Materials/Parts

Spring pin (MS16562-223)

Equipment Conditions

14-6 Universal pintle adapter partially disassembled

Universal Pintle Adapter

1 Remove two shoulder bolts (1) and azimuth indicator (2) and travel lock (10) from adjustable arm (3). |

2 Remove spring pin (4) from thumbscrew (5). Remove thumbscrew and adjustable arm (3) with assembled parts from universal pintle adapter assembly (6). |

3 Remove four machine screws (7) and retaining plate (8) from adjustable arm (3).

4 Remove sleeve bushing (9) from adjustable arm (3).

14-9. UNIVERSAL PINTLE ADAPTER, TRAVERSE ARM ASSEMBLY, AND UNIVERSAL PINTLE ADAPTER BODY ASSEMBLY—MAINTENANCE INSTRUCTIONS (cont)

DISASSEMBLY (cont)

5 Remove four machine screws (10) and retaining plate (11) from body (12).

6 Remove sleeve bushing (13) from body (12).

17 Unscrew locking handle (14) from body (12)

18 Remove retainer screw (17) and split

Spread end of retaining ring (18) and remove quick release pin and cable assembly (19) from travel lock (20).

INSPECTION/REPAIR

1 Inspect for broken, damaged, or missing parts.

If body is broken or damaged, repair is by replacement of next higher assembly.

Repair is by replacement of authorized parts (appx C).

REASSEMBLY

1 Install split sleeve (4) and retaining screw (5).

NOTE

Do not over tighten locking handle when the universal pintle adapter is not installed on mount as the pawl will spread the split ring out of round.

2 Install pawl (6) and screw locking handle (7) into body (3).

3 Install sleeve bushing (2) into body (3).

4 Install retaining plate (1) with inscribed markings and single white dot facing away from arm of body (3). Apply loctite and secure with four machine screws (8).

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Pintle SleevePintle SleeveM122 Tripod

5 Install sleeve bushing (7) into adjustable arm (8).

6 Install retaining plate (9) with inscribed markings and white dot facing the traverse bar (14). | Secure with four machine screws (10).

7 Install adjustable arm (8), with white dots on retaining plates aligned, on body assembly (11). |

8 Screw in thumbscrew (12) and install new spring pin (13), leaving equal lengths protruding.

9 Spread ends of retaining ring (17) and install quick release pin and cable assembly (18) to travel lock I (16). |

10 Install azimuth indicator (14) and travel lock (16) on adjustable arm (8) and secure with two shoulder | bolts (15). Ensure the azimuth indicator markings face outward. Azimuth indicator will still rotate when fully tightened.

14-10. ELEVATION MECHANISM—MAINTENANCE INSTRUCTIONS

THIS TASK COVERS:

Repair

REPAIR

If elevation mechanism is damaged or broken, refer to paragraph 7-8 for repair.

CHAPTER 15 _M6 MACHINE GUN PEDESTAL MOUNT

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