Section 1. Introduction; Parts List Form; Hobart Part Number" Column - Hobart 6921 Series Operation And Maintenance Manual

OM-2040 / Operation and Maintenance Manual
90D20 / Generator Sets

Section 1. Introduction

PART NUMBERS ARE SUBJECT TO CHANGE WITHOUT NOTICE
1. General
The Illustrated Parts List identifies, describes, and illustrates main assemblies, subassemblies, and
detail parts of seven series of Diesel Engine Generator Sets manufactured by Hobart Brothers
Company, Airport Systems Division, Troy, Ohio, 45373.
2. Purpose
This list provides parts identification and descriptive information to maintenance and provisioning
personnel for use in provisioning, requisitioning, purchasing, storing, and issuing of spare parts.
3. Arrangement
Chapter 4 is arranged as follows:
Table of Contents
Section 1 - Introduction
Section 2 - Manufacturer's Codes
Section 3 - Parts List
Section 4 - Numerical Index
4. Explanation of Parts List
a. Contents
The parts list contains a breakdown of the equipment into assemblies, subassemblies, and detail
parts. All parts of the equipment are listed except:
(1) Standard hardware items (attaching parts) such as nuts, screws, washers, etc., which are
available commercially.
(2) Bulk items such as wire, cable, sleeving, tubing, etc., which are also commercially available.
(3) Permanently attached parts which lose their identity by being welded, soldered, riveted, etc., to
other parts, weldments, or assemblies.
b. Parts List Form
This form is divided into five columns. Beginning at the left side of the form and proceeding to the
right, columns are identified as follows:
(1) "FIGURE-ITEM NO." Column This column lists the figure number of the illustration applicable to
a particular parts list and also identifies each part in the list by an item number. These item
numbers also appear on the illustration. Each item number on an illustration is connected to the
part to which it pertains by a leader line. Thus the figure and item numbering system ties the
parts lists to the illustrations and vice versa. The figure and index numbers are also in the nu-
merical index to assist the user in finding the illustration of a part when the part number is known.

(2) "HOBART PART NUMBER" Column

February 28/94 Revised
Chapter 4. Illustrated Parts List
Chapter 4-1
Page 1