Pmcs Procedures Continued

Table 1. Unit Preventive Maintenance Checks and Services for M242 Automatic Gun - Continued

BF =

Before Firing AF = After Firing

M = Monthly SA = Semi-annually AN = Annually

RDS = Round Dependent

Item

Interval

Item to be

Procedure

No.

BF

AF

M

SA

AN

RDS

Inspected

(cont)

RECEIVER ASSEMBLY

4.2

*

Receiver Assembly

Perform Auto Gun Receiver Manual Cycle Check WP 0008 00.

4.3

*

*

Recoil Mechanism

Remove/Clean/Inspect/Service/ Lubricate/Install recoil mechanism per WP 0049 00.

4.4

*

Barrel Support Assembly

Inspect per WP 0050 00.

4.5

*

Receiver Front Housing

Inspect per WP 0050 00.

4.6

12,500 then every 2,500 rounds

Breech Assembly (12524370)

Remove/Inspect/Lubricate/Install per WP 0051 00.

4.7

25,000 then every 5,000 rounds

Breech Assembly (12524527)

Remove/Inspect/Lubricate/Install per WP 0051 00.

4.8

*

Electrical Sear Solenoid

Inspect per WP 0052 00.

4.9

*

*

Bolt and Track Assembly

Remove/Disassemble/Clean/ Inspect/Lubricate/Assemble/Install per WP 0053 00/WP 0054 00.

4.10

*

Bolt and Track Assembly

Inspect firing pin protrusion per WP 0054 00.

4.11

*

*

Bolt and Carrier Assembly

Disassemble/Clean/Inspect/Lubricate/Assemble per WP 0055 00.

4.12

12,000

Firing Pin Assembly (12524512)

Replace per WP 0055 00.

4.13

8,000

Firing Pin Assembly (12524325)

Replace per WP 0055 00.

4.14

*

Direct Current Motor

Remove/Inspect/Lubricate/Install per WP 0061 00.

4.15

*

Sear Assembly

Remove/Inspect/Lubricate/Install per WP 0065 00.

4.16

*

Receiver Gears

Remove/Clean/Inspect/Lubricate/ Install per WP 0067 00.

4.17

*

Chain Guide & Mechanical Interlock

Disassemble/Clean/Inspect/Lubricate/Assemble per WP 0069 00.

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