Wacker Neuson G 2.1A, G 3.3A, GS 4.6A, GS 5.7A, G 4.6A Repair Manual
www.wackergroup.com
Portable Generators
G 2.1A
G 3.3A
G 4.6A
GS 4.6A
GS 5.7A
REPAIR MANUAL
0116567 002
1000 en
0116567
50 HZ PORTABLE GENERATORS FOREWORD
This manual covers machines with Serial Number or Item Number:
0008243, 0008244, 0008245, 0008246, 0008247, 0008248, 0008249,
0008250, 0008251, 0008252, 0008253, 0008254, 0008255, 0008256, 0008257, 0008258, 0008259,
0008260, 0008261, 0008262, 0008263, 0008264, 0008265, 0008266, 0008267, 0008268, 0008269,
0008270, 0008271, 0008272, 0008273, 0008274, 0008275, 0008276, 0008277, 0008278, 0008279,
0008280, 0008281, 0008282, 0008283, 0008284, 0008285, 0008309, 0008310, 0008311, 0008312,
0008313, 0008314, 0008315, 0008316
Operating/Parts Information
You must be familiar with the operation of this machine before you attempt to troubleshoot or make any repairs to it.
Basic operating and maintenance procedures are described in the operator's/parts manual supplied with the machine.
The operator's/parts manual should be kept with the machine. Use it to order replacement parts when needed. If this
manual becomes lost, please contact WACKER Corporation to order a replacement.
Damage caused by misuse or neglect of the unit should be brought to the attention of the operator, to prevent similar
occurrences from happening in the future.
This manual provides information and procedures to safely repair and maintain this WACKER model. For your
own safety and protection from injury, carefully read, understand and observe the safety instructions described
in this manual. THE INFORMATION CONTAINED IN THIS MANUAL WAS BASED ON MACHINES IN PRODUCTION
AT THE TIME OF PUBLICATION. WACKER CORPORATION RESERVES THE RIGHT TO CHANGE ANY PORTION
OF THIS INFORMATION WITHOUT NOTICE.
FOREWORD 50 HZ PORTABLE GENERATORS
Nameplate
A nameplate listing the Model Number, Item Number, Revision, and Serial Number is attached to each unit. Please
record the information found on this plate so it will be available should the nameplate become lost or damaged. When
ordering parts or requesting service information, you will always be asked to specify the model, item number,
revision number, and serial number of the unit.
My machine’s numbers are:
Model number
RevisionItem Number
Model
GS4.6AGS4.6A
GS4.6A
GS4.6AGS4.6A
Item No.
00082690008269
0008269 101101
00082690008269
kg
lbs
GENERATING SET ISO 8528
MADE
IN USA
Serial Number
MENOMONEE FALLS, WI USA 53051
Rev. Serial No.
Vclass
Insul.
Class
101101
101
hz
kW
Man.
Yr.
50101015010101
5010101
50101015010101
A
N/M
110635
1031SD44
50 Hz Portable Generators
Repair Manual
Table of Contents
1 Safety
1.1 Safety Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1A-1
1.2 Laws Pertaining to Spark Arresters . . . . . . . . . . . . . . . . . . . . . . 1A-1
1.3 Operating Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1A-2
1.4 Engine Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1A-3
1.5 Service Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1A-3
2 Technical Data
2.1 Generator Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2A-1
2.2 Engine Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2A-2
3 Power Requirements
3.1 Determining Power Requirements . . . . . . . . . . . . . . . . . . . . . . . 3A-1
3.2 Outdoor Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3A-1
3.3 Indoor Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3A-1
3.4 Grounding the Generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3A-2
3.5 Use of Extension Cords . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3A-2
4 Model G2.1A
4.1 Theory of Operation – Capacitor Generators . . . . . . . . . . . . . . . 4A-1
4.2 Rotor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4A-2
4.3 Stator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4A-2
4.4 Capacitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4A-2
4.5 Diodes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4A-2
4.6 Circuit Breaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4A-3
4.7 Earth Leakage Circuit Breaker (ELCB) . . . . . . . . . . . . . . . . . . . 4A-3
4.8 Capacitors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4A-4
4.9 Engine Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4A-4
4.10 Loss of Residual Magnetism in Rotor. . . . . . . . . . . . . . . . . . . . . 4A-5
4.11 Receptacle Panel Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4A-6
4.12 Rotor Diode Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4A-6
4.13 Stator Winding Testing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4A-7
4.14 Rotor Winding Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4A-8
4.15 Generator Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4A-9
4.16 Generator Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4A-9
4.17 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4A-10
4.18 Periodic Maintenance Schedule. . . . . . . . . . . . . . . . . . . . . . . . 4A-11
4.19 Storing/Transporting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4A-11
4.20 Wiring Schematic (G2.1A Model) . . . . . . . . . . . . . . . . . . . . . . . 4A-12
50 Hz Portable Generators
Repair Manual
Table of Contents, continued
5 Models G3.3A, G4.6A, GS4.6A, & GS5.7A
5.1 Theory of Operation – Brush Generators . . . . . . . . . . . . . . . . . . 5A-1
5.2 Rotor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5A-2
5.3 Stator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5A-2
5.4 Automatic Voltage Regulator (AVR). . . . . . . . . . . . . . . . . . . . . . 5A-2
5.5 Choke . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5A-3
5.6 Bridge Rectifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5A-3
5.7 Engine Auto Idle Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5A-3
5.8 Choke Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5A-3
5.9 Main Circuit Breaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5A-4
5.10 Earth Leakage Circuit Breaker (ELCB) . . . . . . . . . . . . . . . . . . . 5A-4
5.11 Engine Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5A-6
5.12 Auto Idle Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5A-7
5.13 Loss of Residual Magnetism in Rotor . . . . . . . . . . . . . . . . . . . . 5A-9
5.14 Diode Bridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5A-9
5.15 Stator Windings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5A-10
5.16 Rotor Windings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5A-11
5.17 Slip Rings and Brushes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5A-11
5.18 Automatic Voltage Regulator. . . . . . . . . . . . . . . . . . . . . . . . . . 5A-11
5.19 Generator Disassembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5A-13
5.20 Generator Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5A-14
5.21 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5A-15
5.22 Periodic Maintenance Schedule . . . . . . . . . . . . . . . . . . . . . . . 5A-16
5.23 Wiring Schematics – Generator/Engine . . . . . . . . . . . . . . . . . 5A-17
5.24 Storing/Transporting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5A-22
50 HZ PORTABLE GENERATORS SAFETY 1A
1.1 Safety Information
This manual contains DANGER, WARNING, CAUTION, and NOTE callouts which must be followed to reduce the
possibility of personal injury, damage to the equipment, or improper service.
This is the safety alert symbol. It is used to alert you to potential
personal injury hazards. Obey all safety messages that follow
!
this symbol to avoid possible injury or death.
!
DANGER
DANGER indicates an imminently hazardous
situation which, if not avoided, will result in
death or serious injury.
!
WARNING
WARNING indicates a potentially hazardous
situation which, if not avoided, could result in
death or serious injury.
!
CAUTION
CAUTION indicates a potentially hazardous
situation which, if not avoided, may result in
minor or moderate injury.
CAUTION: Used without the safety alert symbol,
CAUTION indicates a potentially hazardous situation
which, if not avoided, may result in property damage.
Note:
Contains additional information
important to a procedure.
1.2 Laws Pertaining to Spark Arresters
Notice: Some local authorities require that in certain locations, spark arresters be used on internal combustion engines.
A spark arrester is a device designed to prevent the discharge of sparks or flames from the engine exhaust. It is often
required when operating equipment on forested land to reduce the risk of fires. Consult the engine distributor or local
authorities and make sure you comply with regulations regarding spark arresters.
1A-1
1A SAFETY 50 HZ PORTABLE GENERATORS
WARNING
BACKFEED FROM THE GENERATOR INTO THE PUBLIC POWER DISTRIBUTION SYSTEM CAN
CAUSE SERIOUS INJURY OR DEATH TO UTILITY WORKERS!
Improper connection of generator to a building’s electrical system can allow electrical current from the generator
to backfeed into utility lines. This could result in electrocution of utility workers, fire, or explosion. Connections to
a building’s electrical system must be made by a qualified electrician and comply with all applicable laws and
electrical codes.
1.3 Operating Safety
Familiarity and proper training are required for the safe operation of electrical equipment! Equipment operated
improperly or by untrained personnel can be dangerous! Read the operating instructions and familiarize yourself with
the location and proper use of all instruments and controls. Inexperienced operators should receive instruction from
someone familiar with the equipment before being allowed to operate the generator.
NEVER operate generator when open containers of
fuel, paint, or other flammable liquids are nearby.
NEVER operate generator, or tools attached to the
generator, with wet hands.
NEVER use worn electrical cords. Severe electrical
shock and equipment damage may result.
NEVER run generator indoors or in an enclosed area
unless adequate ventilation, through such items as
exhaust fans or hoses, is provided. Exhaust gas from
the engine contains poisonous carbon monoxide
gas; exposure to carbon monoxide can cause loss of
consciousness and may lead to death.
NEVER run electrical cords under the generator, or
over vibrating or hot parts.
NEVER enclose or cover generator when in use or
when hot.
NEVER overload generator. The total amperage of
the tools and equipment attached to the generator
must not exceed the load rating of the generator.
WARNING
NEVER allow untrained personnel to operate or
service the generator. Know how to operate and stop
generator before starting it.
NEVER operate generator in snow, rain, or standing
water.
ALWAYS keep generator at least three feet (one
meter) away from structures, buildings, and other
equipment during use.
ALWAYS keep generator out of reach of children
and pets.
ALWAYS keep the area immediately surrounding
the generator clean, neat and free of debris.
ALWAYS position and operate generator on a firm,
level surface.
ALWAYS remove all tools, cords, and other loose
items from generator before starting it.
ALWAYS make certain generator is well-grounded
and securely fastened to a good earthen ground.
1A-2
ALWAYS transport generator in an upright position.
50 HZ PORTABLE GENERATORS SAFETY 1A
1.4 Engine Safety
Internal combustion engines present special hazards during operation and fueling! Read and follow warning
instructions in engine owner’s manual and safety guidelines below. Failure to follow the safety guidelines described
below could result in severe injury or death.
WARNING
DO NOT run engine indoors or in an enclosed area
unless adequate ventilation, through such items as
exhaust fans or hoses, is provided.
DO NOT fill or drain fuel tank near an open flame,
while smoking, or while engine is running.
DO NOT fill fuel tank indoors or in an enclosed area
unless adequate ventilation, through such items as
exhaust fans, is provided.
DO NOT touch or lean against hot exhaust pipes.
DO NOT operate with the fuel tank cap loose or
missing.
DO NOT add fuel to a hot or running engine.
DO NOT start engine if fuel has spilled or an odor of
fuel is present. Move generator away from the spill
and wipe generator dry before starting.
1.5 Service Safety
Poorly maintained equipment can become a safety hazard! In order for the equipment to operate safely and properly
over a long period of time, periodic maintenance and occasional repairs are necessary. If the generator is experiencing
problems or is being serviced, attach a “DO NOT START” sign to the control panel to notify other people of its condition.
WARNING
NEVER allow water to accumulate around the
base of the generator set. If water is present,
move the generator and allow it to dry before
servicing.
NEVER service generator if clothing or skin is
wet.
NEVER use gasoline or other low flash point
solvents to clean air filter elements.
NEVER allow untrained personnel to service
this equipment. Only trained electrical technicians
should be allowed to service the electrical
components of this equipment.
NEVER modify the equipment without express
written approval from WACKER Corporation.
ALWAYS replace all guards and safety devices
immediately after servicing.
ALWAYS turn engine off before servicing generator.
If engine has electric start, disconnect negative
terminal on battery.
ALWAYS keep generator clean and labels legible.
Replace all missing and hard-to-read labels. Labels
provide important operating instructions and warn of
dangers and hazards.
ALWAYS let engine cool before transporting or
servicing.
ALWAYS remain aware of moving parts and keep
hands, feet, and loose clothing away from moving
parts on generator and engine.
ALWAYS keep fuel lines in good condition and
properly connected. Leaking fuel and fumes are
extremely explosive.
1A-3
1A SAFETY 50 HZ PORTABLE GENERATORS
Notes:
1A-4
50 HZ PORTABLE GENERATORS TECHNICAL DATA 2A
2.1 Generator Specifications
Table 2-1.
ledoM A1.2G A3.3G A6.4G A6.4SG A7.5SG
tuptuOAVk1,23,36,4
epyTsselhsurBrotalugeRegatloVcitamotuA
Ø11,4
Ø37,5
elbaliavasegatloVCA
esahp&egatlov
ycneuqerFzH05
rotcaFrewoP0,1
selcatpeceRCAlanoitpO
rekaerBtiucriCniaMpma)elop1(01)elop1(51)elop1(02)elop3(9
tnerruCsuounitnoC
V004/V032tapma.A.N/1,9.A.N/3,41.A.N/0,022,8/0,81
LxWxH
)yrd(thgieWgK4417083838
yrettaBA/NA/NA/N02/21/A-L81N-05
mm
586x544x534586x585x035
V032
esahp1
Ø1V032
Ø3V004
Ø10,1
Ø38,0
2A-1
TECHNICAL DATA 50 HZ PORTABLE GENERATORS
2A
2.2 Engine Specifications
ledoM A1.2G A3.3G A6.4G A6.4SG A7.5SG
ekaMenignE adnoH
ledoMenignEXV1K061XG1K042XG1K043XG
mpr0003@rewoPWk1,40,62,8
cibuctnemecalpsiDmc361242733
–deepSgnitarepO
daolon
–deepSgnitarepO
daollluf
deepSeldIotuAmprA/N0022±05
ecnaraelCevlaV
)dloc(
tsuahxe
ekatni
gulPkrapSepytU-RPE02W/SE6RPB
paGgulPkrapSmm8,0–7,0
retratS)V/epyt(A/NA/NA/NV21/cirtcelE
rotanretlApmaA/NA/NA/N1
leuFepyT)enatcO77.niM(dedaelnuralugeR
noitpmusnoCleuFrh/retil7,14,22,3
yticapaCknaTleuFretil7,35,91
emiTgninnuR.rh2,22,80,6
renaelCriAepytrenaelc-erpmaofdettew-liohtiwepytyrD
noitacirbuLenignE
yticapaC
mpr
mpr
mm02,0
edarglio
ecivres
ssalc
lm
006
Table 2-2.
03W01EAS
ESro,FS,GS
05±0013
0003±50
51,0
03W01EAS
FSroGS
0011
2A-2
50 HZ PORTABLE GENERATORS POWER REQUIREMENTS 3A
3.1 Determining Power
Requirements
These generators are designed to operate single-phase,
50 hertz appliances or tools running at 230 VAC for the
G2.1A, G3.3A, G4.6A, and GS4.6A models, and a single
phase voltage of 230 VAC and a three phase voltage of
400 VAC for the GS5.7A model. Check the nameplate or
label provided on tools and appliances to make sure their
power requirements match the power output of the
generator.
Some appliances and tools require a surge of current
when starting. This means that the amount of power
needed to initially start the equipment is larger than the
power required to keep it running. The generator must be
capable of supplying this “surge” current. Other types of
appliances require more power than is actually stated on
their nameplates.
The chart below is offered only as a general guideline to
help you in determining power requirements for different
types of equipment. Check with your nearest WACKER
Dealer, or contact the manufacturer or dealer of the tool
or appliance, with questions regarding power
requirements.
3.2 Outdoor Installation
Place the generator in an area where it will not be
exposed to rain or snow. Make sure it is positioned on
firm, level ground so it will not slide or shift. Position
engine exhaust away from areas where people may be
present.
If operating the generator inside a tunnel or deep trench,
make sure there is adequate ventilation. Precautions
similar to those required when operating indoors may be
necessary.
The surrounding area must be free of water and moisture.
All components must be protected from excessive
moisture.
3.3 Indoor Installation
If the generator must be operated indoors, adequate
ventilation or exhaust hoses must be provided. When
venting exhaust fumes, make sure the exhaust piping is
large enough to prevent excessive back pressure to the
engine. Back pressure reduces engine efficiency and
may cause the engine to overheat.
• Incandescent lights and appliances such as irons
and hot plates use a resistive-type heating element
and require the same wattage to start and run as is
stated on their nameplates.
• Fluorescent and mercury lamps require 1.2 – 2 times
their stated wattage to start.
• Electrical motors and many types of electrical tools
often require a large starting current. The amount of
starting current depends on the type of motor and its
use.
• Most electrical tools require 1.2 – 3 times their stated
wattage for running.
• Loads such as submersible pumps and air compressors require a very large force to start. They need as
much as 3 – 5 times the wattage stated on their
nameplates in order to start.
If the wattage is not given for a particular tool or appliance, it can be calculated by multiplying its voltage and
amperage requirements:
VOLTS x AMPS = WATTS
CAUTION: If a tool or appliance does not reach full
speed within a few seconds when switched on, turn it off
immediately to avoid damage.
WARNING
Exhaust gas from the engine contains poisonous
carbon monoxide gas; exposure to carbon monoxide
can cause loss of consciousness and may lead to
death. Never run generator indoors or in an enclosed
area unless adequate ventilation, through such items
as exhaust fans or hoses, is provided.
When operated indoors, steps to prevent fire and explosion
such as, providing a good earthen ground, removing all
flammable materials near generator, and using only
electric cords in good condition, must be observed. See
Section 1.3
Operating Safety.
CAUTION: When starting loads, DO NOT exceed two
(2) times the given Continuous Current rating for model
G2.1A, or one-and-one-half (1 1/2) times for all other
models, as damage to the generator may occur. See
Section 2.1
Generator Specifications
.
3A-1
3A POWER REQUIREMENTS 50 HZ PORTABLE GENERATORS
3.4 Grounding the Generator
The generator should be grounded to a good ground
source in compliance with National Electric Code standards and local regulations.
Use #8 wire and secure one end to the ground terminal
(a) provided on the generator frame and the other end to
a suitable ground source. See Figure 3-1.
a
1001SD02
Figure 3-1. Grounding
3.5 Use of Extension Cords
When a long extension cord is used to connect an appliance or tool to the generator, a voltage loss occurs – the longer
the cord, the greater the voltage loss. This results in less voltage being supplied to the appliance or tool and increases
the amount of current draw or reduces performance. A heavier cord with a larger wire size will reduce the voltage loss.
Use Table 3-1 below as a guide for selecting proper cable size.
Use only extension cords rated for outdoor use and equipped with a third-wire ground.
Table 3-1.
Current Load in Watts Maximum Cable Length in Ft.
Amps 120V 240V #10 #12 #14 #16
2.5 300 600 1000 ft. 600 ft. 375 ft. 250 ft.
5 600 1200 500 ft. 300 ft. 200 ft. 125 ft.
7.5 900 1800 350 ft. 200 ft. 125 ft. 100 ft.
10 1200 2400 250 ft. 150 ft. 100 ft.
15 1800 3600 150 ft. 100 ft. 65 ft.
20 2400 4800 125 ft. 75 ft. 50 ft.
CAUTION: Operating equipment at low voltage can cause overheating.
Keep electrical cords in good condition. DO NOT use worn,
bare, or frayed cords which can cause electrical shock.
3A-2
WARNING
50 HZ PORTABLE GENERATORS G2.1A/G2.1AE 4A
4.1 Theory of Operation – Capacitor Generators
Basic Generator Theory
Wacker air-cooled generators work on the principle of
electromagnetic induction i.e., the cutting of magnetic
lines of force by a coil of wire to produce an electric
voltage in the coil of wire.
The two main components of the generator, the rotor and
stator, are the key. The rotor acts as the magnet and the
stator acts as the coil of wire. As the rotor rotates, its
magnetic lines of force are cut by the coils of wire in the
stationary stator. The voltage induced in the windings of
the stator is tapped off and available at the receptacles.
Brushless Generator
This model generator uses a brushless design to generate
and regulate power. It consists of a rotor, stator, diodes,
and an auxiliary winding. The brushless generator also
contains a capacitor that is connected to the auxiliary
winding. Its purpose is to regulate the voltage in the main
windings and prevent a voltage drop when a load is
applied.
This generator is designed to operate with single phase
loads at or near a power factor of 1.0. The principle of
operation is schematically represented in Figure 4-1, and
a cross-sectional view in Figure 4-2. The auxiliary
winding (a), in conjunction with the capacitor, provide
excitation by inducing current in the rotor windings (b)
which is rectified by the diodes (c) to produce direct
current. The main stator winding (d) is designed for
parallel connection to give a voltage output with no
voltage adjustment possible.
Diodes
(Rectifier)
c
b
d
Main Windings
Figure 4-1. Principle of Operation Schematic
Rotor Field
Windings
a
Auxiliary Winding
Capacitor
1023SD44
4A-1
4A G2.1A/G2.1AE 50 HZ PORTABLE GENERATORS
a
b
d
c
Figure 4-2. Brushless Type Generator
4.2 Rotor (a)
The inside of the rotor shaft is tapered and connected
directly to the taper on the engine crankshaft. This end is
supported by the engine crankshaft bearing. The opposite end of the rotor is supported by a bearing installed in
the generator housing. This end also contains the two
diodes mounted on the diode bracket assembly. There
are two individual coils wound on the rotor. When the
engine is running, these two windings create the magnetic field for the main stator windings.
4.3 Stator (b)
The stator houses both the main windings and auxiliary
winding. The main windings are connected directly to the
main circuit breaker to supply power to the output receptacles. The auxiliary winding induces the initial voltage in
the field windings of the rotor and regulates the voltage.
It is connected directly to the main capacitor.
1022SD88
4.4 Capacitor (c)
A capacitor is connected in series with the auxiliary
winding. Its purpose is to regulate the voltage when a
load is applied.
4.5 Diodes (d)
Two diodes are located on the rotor. These diodes form
a half wave rectifier to convert the induced AC voltage in
the rotor windings to DC voltage.
4A-2
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