Maintenance Procedures

a. Initial Setup. Initial Setup is a list of everything needed in order to do maintenance on one part of the weapon.

Tools and Special Tools—Lists tools needed to perform maintenance.

Materials/Parts—Lists expendable/durable materials and 100% replaceable parts. Each material or part is followed by a part number or work package reference. If more than one part is needed, the quantity needed precedes the part number or reference.

Personnel Required—Lists the number of personnel needed when more than one person is required.

References—Lists other publications containing necessary information.

Equipment Conditions—Lists conditions to be met before starting the procedure. The reference on the left of the condition is a work package reference to instructions for setting up the condition.

b. Step-By-Step Procedures. Step-by-step procedures are illustrated procedures for maintenance authorized in the maintenance allocation chart (MAC). For replacement of parts, see WP 0086 00 through WP 0115 00.

c. WARNINGS and CAUTIONS. Throughout the manual you will see WARNING and CAUTION data which must be followed.

(1) WARNING. A warning is used to alert the user of hazardous operating and maintenance procedures, practices, conditions, statements, etc., that may result in injury to or death of personnel if not strictly observed.

(2) CAUTION. A caution is used to alert the user of hazardous operating or maintenance procedures, practices, conditions, statements, etc., that may result in damage to or destruction of equipment or of mission effectiveness if not strictly observed.

d. Callouts. A dashed callout arrow in the procedures means the part being called out is hidden, i.e., you can't see it on the illustration. For example:

M242 25mm Bevfitchett

(2) Callout 2 is the housing bore.


M242 25-MM AUTOMATIC GUN (NSN 1005-01-086-1400) M242 25-MM ENHANCED AUTOMATIC GUN (NSN 1005-01-454-0396)


M242 Automatic

a. Type of Manual. Direct Support Maintenance, including repair parts and special tools list.

b. Model Number and Equipment Name. M242, 25-mm Automatic Gun and M242 25-mm Enhanced Automatic Gun.

c. Purpose of Equipment. Provides protection and fighting capabilities. MAINTENANCE FORMS, RECORDS, AND REPORTS

Department of the Army forms and procedures used for equipment maintenance will be those prescribed by DA PAM 738-750, Functional Users Manual for the Army Maintenance Management System (TAMMS). Marine Corps personnel will use TM 4700-15/1, Equipment Record Procedures.

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  • hunter thomson
    Which manual covers guaging for the 25mm machine gun?
    1 hour ago

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