Technical data

TM 9-1005-319-23&P 0023

0023-1

FIELD MAINTENANCE

HAMMER ASSEMBLY MAINTENANCE

DISASSEMBLY, REPAIR OR REPLACEMENT, ASSEMBLY

INITIAL SETUP:

Equipment Condition

Hammer assembly removed (WP 0021)

DISASSEMBLY

M 1 6 A 2 / M 1 6 A 4 / M 4

M 1 6 A 3 / M 4 A 1

1 v s 2 0 2

Figure 1. Disassembly of Hammer Assembly.

NOTE

M16A2 burst cam is black. M4 burst cam is nickel colored (shiny).

M16A2, M16A4, and M4: Remove hammer spring (1), burst cam spring (2), and burst cam (3) from

hammer and hammer pin retainer assembly (4). M16A3 and M4A1: Remove hammer spring (5) from

hammer (6).

END OF TASK

REPAIR OR REPLACEMENT

1. Inspect hammer spring for deformities, breaks, and bends. Pay special attention to the large coil.

Replace hammer spring if defective.

2. Inspect burst cam spring and burst cam for deformities, breaks, and bends; replace if defective.

3. Inspect hammer and hammer pin retainer assembly for chips and breaks. Hammer pin should click

home under strong finger pressure. Install hammer pin into hole in hammer to check spring retention

of the hammer pin. Replace hammer and hammer pin retainer assembly if defective.

END OF TASK