Hobart 6921 Series Operation And Maintenance Manual page 7

OM-2040 / Operation and Maintenance Manual
90D20 / Generator Sets
Introduction
1. General
The following information is provided for the operator to familiarize himself with using the manual
properly. THE MANUAL MUST BE READ AND UNDERSTOOD BEFORE PERSONNEL ATTEMPTS
TO OPERATE, INSTALL, OR REPAIR THIS EQUIPMENT.
2. Scope
The manual covers a series of synchronous Motor-Generator Sets identified by the Specification
Numbers listed. A detailed description of the equipment and information covering operation,
maintenance, troubleshooting, repair, and overhaul is included.
3. Purpose
The manual provides information and instructions to guide and assist operator and maintenance
personnel in the proper use and maintenance of the equipment.
4. Contents
The Introduction is a List of Effective Pages which lists each page in the manual by its Chapter/Section,
and page number. Directly opposite each page number listing is a date which indicates whether the
page is original or revised.
The Table of Contents contains a list of all Chapters, Sections, and the principal paragraph titles within
each Section. The location of each listing is identified by Chapter/Section and page number. A
complete list of illustrations with their location is provided at the end of the Table of Contents.
The main text of the manual is divided into four Chapters as follows:
Chapter 1. Description/Operation
Chapter 2. Servicing
Chapter 3. Troubleshooting
Chapter 4. Illustrated Parts List
Each Chapter is divided into as many Sections as necessary. Sections are referred to by a combination
Chapter/Section number. Example, 2-3 refers to Chapter 2, Section 3.
5. Format
a. Paragraphing and Outlining
The material within each Section is divided into main subjects with applicable paragraph headings
and sub-headings as required. This method provides a means of identifying material for reference
purposes. For example;
(1) Control
a. A. Interior Panel
• (1) Protective devices
•
• (2) Contactors
February 28/94 Revised
(a) Overload relay
Introduction
Page 1