Generac Power Systems 53187 - Manual (Page 5)

PARTI
THE REVOLVING FIELD AC GENERATOR
SECTION 1.1
INTRODUCTION
Section 1.1
INTRODUCTION
Service Manual Familiarization
This SERVICE MANUAL is divided into six (6)
PARTS. Each PART consists of tw o or m ore SEC­
TIONS. In turn, each SECTION is divided into SUB­
SECTIONS.
At the front of the m anual is a m ain TABLE OF
CONTENTS divider page w hich lists the titles of Parts
1 through 6.
Each PART of the m anual is also identified by a
divider page w hich Identifies the SECTIONS that m ake
up that PART.
PMes are num bered so as to identify the PART
and SECTION, as w ell as the specific page num ber.
For exam ple, "Page 2.1-3" indicates Page 3 of Part 2,
Section 1. This type of num bering system perm its indi­
vidual Sections of the m anual to be kept current w ithout
affecting the entire m anual.
Contents of Manual
Part 1 - The Revolving Field AC Generator
Section 1.1- Introduction
Section 1.2- How a Generator W orks
Section 1.3- Major Com ponents (Units w ith 15 inch
Stator)
Section 1.4- Major Com ponents (Units w ith 10 inch
Stator)
Section 1.5- Introduction to Troubleshooting
Section 1.6- Troubleshooting (Units w ith 15 inch
Stator)
Section 1.7- Troubleshooting (Units w ith 10 inch
Stator)
Section 1.8- Insulation Resistance Tests
Section 1.9- Operational Tests & Adjustm ents
Part 2- Engine Mechanical
Section 2.1- Engine Specifications & Charts
Section 2.2- General Inform ation
Section 2.3- Engine Disassem bly
Section 2.4- Disassem bly and Inspection
Section 2.5- Engine Reassem bly
Part 3- Engine Lubrication & Cooling System
Section 3.1- Engine Lubrication System
Section 3.2- W ater Pum p and Therm ostat
Section 3.3- Cooling and Ventilating Air
Section 3.4- Periodic Maintenance
Part 4- Engine Fuel System
Section 4.1- Introduction to the Diesel Fuel System
Section 4.2- Fuel Pum p
Section 4.3- Governor
Section 4.4- Fuel Injection Pum p
Section 4.5- Fuel Nozzles and Holders
Part 5- Engine Electrical System
Section 5.1- Introduction to DC Control System s
Section 5.2- Engine Cranking System
Section 5.3- Battery Charge System
Section 5.4- Preheat System
Section 5.5- Engine Protective System s
Section 5.6- Rem ote Radiator Fan (Model 9319)
Section 5.7- Rem ote Panels
Section 5.8- Troubleshooting Row Charts
Section 5.9- Troubleshooting Test Procedures
Part 6- Electrical Data
Page 6.1-1- Resistances of Rotors & Stators
Page 6.1-1- Index to W iring Diagram s and Eiectrical
Schem atics
Identifying Units By Stator Diameter
Throughout the Manual, generators are identified
as having either a "15 inch" ora "10 inch" stator. These
num bers refer to the DIAM ETER of the stator can
lam inations. See Figures 1 and 2 on next page.
In addition to the diam eter and construction of the
stator assem bly, the follow ing differences exist be­
tw een units w ith 10 inch stator and those having a 15
inch stator:
1. Units w ith 15 inch stator lam inations are equipped
w ith a Part No. 67680 Voitage Regulator.
a. This type of Voltage Regulator m ounts three advi­
sory lam ps (LED’s) w hich greatly sim plify trouble­
shooting.
b. The 67680 R^ulator requires a sensing voltage
of 240 volts AC. To provide the required 240 volts, a
step-up transform er (120 to 240 VAC) is used.
2. Units w ith 10 inch stator lam inations are equipped
w ith a Part No. 81918 Voltage Regulator.
a. The 81918 Regulator m ounts a single lam p (LED)
w hich rem ains on as long as sensing voltage is
available.
b. The 81918 Regulator requires a sensing voitage
of 120 volts AC and the step-up transform er is NOT
required.
Three Different Engine DC Control Sys­
tems
The NP/IM series generators m aybe equipped w ith
any one of three different kiinds of engine DC control
system s. For convenience, the three different DC sys­
tem s have been arbitrarily identified as Type 1, Type 2
and Type 3.
Refer to Part 5. "ENGINE ELECTRICAL SYS­
TEM", for a description Type 1, 2 and 3 DC control
system s.
PAGE 1.1-1