Operating instructions

TM 11574A-OI
4-1
CHAPTER 4
REPAIR PARTS SECTION
SECTION I
I. REPAIR PARTS INFORMATION
4-1. Scope
This section furnishes complete data, including items used in conjunction with and furnished as
part of, or with, the equipment, to enable the user to perform required maintenance and supply
support of the equipment described herein. It is comprised of the following parts: Item
Identification Listing, Item Number Cross-Reference, National Stock Number (NSN) Cross-
Reference, and Part Number (P/N) Cross-Reference.
This preface furnishes explanations and application of the information contained in the
succeeding parts of this RPL, defines Source Maintenance Recoverability (SMR) codes
(Chapter 4, Section III).
SECTION II
II. ITEM IDENTIFICATION LISTING
4-2. Repair Parts Lists and Illustrations
This listing comprises the main part of the RPL. It is arranged in columns which show stock
numbers, item identification, and other data necessary to maintain this equipment in an
operative condition. Illustrations are placed either before, or in close proximity to, the component
or assembly. The items are arranged in top down breakdown sequence within the major
combination.
a. Repair Parts
: This listing presents all repair parts contained in the equipment and is
numbered in sequence by component. Repair parts need not be identical with parts of the
original equipment, but as replacement parts they are considered suitable or preferred.
b. Item Numbers (Column 1): This column specifies item numbers assigned in numerical
sequence and in the order that each item appears in the RPL. The item numbers are
provided for reference purposes. In emergencies, these item numbers may be used for
RPL number and date on requisitions which combat units transmit by message.
c. Model (Column 2)
: This column indicates by an alphabetical code the specific application
of repair parts, components, or assemblies when more than one model of an assembly,
component, or equipment is contained in this publication.
d. Stock Number (Column 3)
: This column furnishes National Stock Numbers (NSNs)
assigned to those centrally managed items required for support of the equipment. When
they have been assigned, NSNs will be used in all supply operation, from original purchase to
final disposal of the item. Absence of an NSN indicates the item is not normally stocked as a
repair part, as indicated by the source code portion of the SMR codes. If an item without an
NSN is required, it should be determined if the item can be obtained from assembly,
manufacturer or salvage by referring to the source code. Items not stock numbered, that cannot
be obtained from these sources, may be requisitioned using the manufacturer’s code and part
number referencing the RPL number, date of the RPL and the line item number which applies.
e. Reference Designator (Column 4)
: This column contains alphabetical and/or numerical
designators for referencing an individual repair part to an illustration. The absence of a