Wacker Neuson G 25 Operator's Manual

0158596en 013
0709

Mobile Generator

G 25

OPERATOR’S MANUAL

0158596EN

Foreword

WARNING

CALIFORNIA

Proposition 65 Warning:

Engine exhaust, some of its constituents, and certain
vehicle components, contain or emit chemicals known
to the State of California to cause cancer and birth
defects or other reproductive harm.

This manual provides information and procedures to
safely operate and maintain this Wacker Neuson
model. For your own safety and protection from injury,
carefully read, understand and observe the safety
instructions described in this manual.

Keep this manual or a copy of it with the machine. If you
lose this manual or need an additional copy, please
contact Wacker Neuson Corporation. This machine is
built with user safety in mind; however, it can present
hazards if improperly operated and serviced. Follow
operating instructions carefully! If you have questions
about operating or servicing this equipment, please
contact Wacker Neuson Corporation.

The information contained in this manual was based on
machines in production at the time of publication.
Wacker Neuson Corporation reserves the right to
change any portion of this information without notice.

All rights, especially copying and distribution rights, are
reserved.

Copyright 2009 by Wacker Neuson Corporation.

No part of this publication may be reproduced in any
form or by any means, electronic or mechanical,
including photocopying, without express written
permission from Wacker Neuson Corporation.

Any type of reproduction or distribution not authorized
by Wacker Neuson Corporation represents an
infringement of valid copyrights and will be prosecuted.
We expressly reserve the right to make technical
modifications, even without due notice, which aim at
improving our machines or their safety standards.

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G 25 Table of Contents

Foreword 3

1 Safety Information 7

1.1 Operating Safety .................................................................................. 8

1.2 Service Safety .................................................................................... 10

1.3 Operator Safety while using Internal Combustion Engines ................ 12

1.4 Towing Safety ..................................................................................... 13

1.5 Reporting Trailer Safety Defects ........................................................ 13

1.6 Label Location .................................................................................... 14

1.7 Safety and Operating Labels .............................................................. 16

2 Operation 24

2.1 Control Panels .................................................................................... 24

2.2 Generator Monitoring ......................................................................... 26

2.3 Engine Monitoring .............................................................................. 28

2.4 Engine Shutdown Faults .................................................................... 30

2.5 Current Overload Fault ....................................................................... 31

2.6 Application .......................................................................................... 31

2.7 Voltage Selector Switch ..................................................................... 32

2.8 Emergency Stop Switch ..................................................................... 33

2.9 Main Line Circuit Breaker ................................................................... 34

2.10 Engine Start Switch ............................................................................ 35

2.11 Voltage Adjustment Rheostat ............................................................. 35

2.12 Warning Light ..................................................................................... 35

2.13 Connection Lugs ................................................................................ 36

2.14 Ground Connection ............................................................................ 37

2.15 Convenience Receptacles .................................................................. 37

2.16 Remote Run Terminal Block .............................................................. 37

2.17 Panel Door Interlock Switch ............................................................... 37

2.18 Terminal Connections ........................................................................ 38

2.19 Before Starting ................................................................................... 39

2.20 Manual Start-up .................................................................................. 40

2.21 Running the Generator ....................................................................... 42

2.22 Engine Power Correction Factors ...................................................... 42

2.23 Shutting Down Generator ................................................................... 43

2.24 Cold Weather Start-up ........................................................................ 43

2.25 Lifting .................................................................................................. 43

2.26 Overnight Storage .............................................................................. 43

2.27 Long-term Storage ............................................................................. 43

2.28 Automatic/Remote Start-up ................................................................ 44

2.29 Remote/Transfer Switch ..................................................................... 45

2.30 Towing ................................................................................................ 46

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Table of Contents G 25

3 Maintenance 48

3.1 Periodic Maintenance Schedule ..........................................................48

3.2 New Machines .....................................................................................49

3.3 Resetting the Periodic Maintenance Timer .........................................49

3.4 Air Cleaner ..........................................................................................50

3.5 Engine Lubrication ...............................................................................50

3.6 Engine Coolant ....................................................................................50

3.7 Trailer Maintenance .............................................................................51

3.8 Troubleshooting Automatic Shutdown .................................................52

3.9 Generator and Receptacle Wiring .......................................................54

3.10 Trailer Wiring .......................................................................................60

3.11 Engine Wiring ......................................................................................62

4 Factory-Installed Options 70

4.1 Block Heater ........................................................................................70

4.2 Fuel/Water Separator ..........................................................................71

4.3 Automatic LCD Heat ............................................................................72

4.4 Low Coolant Shutdown .......................................................................73

4.5 Temperature-Activated Shutters .........................................................74

4.6 Lockable Battery Disconnect ...............................................................74

4.7 Extended Run Tank .............................................................................75

4.8 Battery Charger ...................................................................................75

4.9 Cam-Lock ............................................................................................76

4.10 Containment System ...........................................................................77

4.11 Wiring Diagram—Factory-Installed Options ........................................78

4.12 Wiring Diagram Components—Factory-Installed Options ...................79

5 Technical Data 80

5.1 Engine Power Rating ...........................................................................80

5.2 Engine Data Table 1 ............................................................................80

5.3 Engine Data Table 2 ............................................................................81

5.4 Generator Data ....................................................................................82

5.5 Trailer and Skid Data ...........................................................................83

5.6 Dimensions ..........................................................................................84

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G 25 Safety Information

G

1 Safety Information

This manual contains DANGER, WARNING, CAUTION, NOTICE, 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 indicates a hazardous situation which, if not avoided, will
result in death or serious injury.

DANGER

WARNING indicates a hazardous situation which, if not avoided, could
result in death or serious injury.

WARNING

CAUTION

WARNIN

CAUTION indicates a hazardous situation which, if not avoided, could
result in minor or moderate injury.

NOTICE: Used without the safety alert symbol, NOTICE indicates a
situation which, if not avoided, could result in property damage.

Note: Contains additional information important to a procedure.

Electrocution hazard!

Electrocution or severe electrical shock hazards are present
throughout the generator any time the engine is running! Read all
safety notes contained in this section before operating or servicing this
equipment.

No one except a trained electrician, familiar with this equipment,
should attempt repairs to the generator! Test procedures which require
that the generator be running must be performed using extreme
caution.

This machine is built with user safety in mind; however, like any
electrical device it can present serious hazards if improperly operated
and serviced. Follow instructions carefully! Should questions arise
during operation or service of this equipment, contact Wacker Neuson
Corporation.

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Safety Information G 25

1.1 Operating Safety

Familiarity and proper training are required for the safe operation of the
machine. Machines operated improperly or by untrained personnel
can be hazardous. Read the operating instructions contained in this

WARNING

1.1.1 NEVER operate the generator when open containers of fuel, paint, or

1.1.2 NEVER place flammable material or liquids near the generator.

1.1.3 NEVER operate the generator, or tools attached to the generator, with

1.1.4 NEVER use worn electrical cords. Severe electrical shock and

1.1.5 NEVER operate the machine indoors unless exhaust fumes can be

manual and the engine manual, and familiarize yourself with the
location and proper use of all controls. Inexperienced operators should
receive instruction from someone familiar with the machine before
being allowed to operate it.

other flammable liquids are near.

wet hands.

equipment damage may result.

adequately ventilated.

1.1.6 NEVER overload the generator. The total amperage of the tools and
equipment attached to the generator must not exceed the load rating
of the generator.

1.1.7 NEVER allow untrained personnel to operate or service the generator.
The generator set should be set up by a certified electrician.

1.1.8 NEVER operate generator in standing water.

1.1.9 NEVER touch the hot engine, exhaust, or generator components.
Burns will result.

1.1.10 NEVER start a machine in need of repair.

1.1.11 Use the emergency stop button only in an actual emergency. DO NOT
restart the engine until the cause of the trouble has been determined
and fixed.

1.1.12 Wear hearing protection when operating equipment.

1.1.13 ALWAYS follow starting and stopping instructions described in this
manual. Know how to operate and stop generator before starting it.

1.1.14 ALWAYS make a walk-around inspection of the generator set before
starting it. Open side doors and visually inspect engine compartment
for obvious damage or the presence of foreign objects which might
affect operation.

1.1.15 ALWAYS keep the machine at least one meter (three feet) away from
structures, buildings, and other equipment during use.

1.1.16 Store the machine properly when it is not being used. The machine
should be stored in a clean, dry location out of the reach of children.

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G 25 Safety Information

1.1.17 ALWAYS keep the area immediately surrounding and underneath the
machine clean, neat, and free of debris and combustible materials.
Make sure that the area overhead is clear of debris that could fall onto
or into the machine or exhaust compartment.

1.1.18 Be sure the machine is on a firm, level surface and will not tip, roll,
slide, or fall while operating.

1.1.19 ALWAYS remove all tools, cords, and other loose items from the
generator before starting it.

1.1.20 ALWAYS make certain the machine is well-grounded and securely
fastened to a good earthen ground per national and local regulations.

BACKFEED FROM THE GENERATOR INTO THE PUBLIC POWER
DISTRIBUTION SYSTEM CAN CAUSE SERIOUS INJURY OR
DEATH TO UTILITY WORKERS!

DANGER

Improper connection of generator to a building’s electrical system can
allow electrical current from the generator to backfeed into utility lines.
This may 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.

If connected to a building’s electrical system the generator must meet
the power, voltage, and frequency requirements of the equipment in
the building. Differences in power, voltage, and frequency
requirements may exist and improper connection may lead to
equipment damage, fire, and personal injury or death.

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Safety Information G 25

1.2 Service Safety

A poorly maintained machine can become a safety hazard! In order
for the machine to operate safely and properly over a long period of
time, periodic maintenance and occasional repairs are necessary.

WARNING

1.2.1 NEVER perform even routine service (oil/filter changes, cleaning,
etc.) unless all electrical components are shut down. Before

servicing this machine, make sure the engine start switch is turned to
off “O”, the circuit breakers are open (off), the emergency stop switch
is closed (pushed in), and the negative terminal on battery is
disconnected. Attach a “DO NOT START” sign to the control panel.
This will notify everyone that the unit is being serviced and will reduce
the chance of someone inadvertently trying to start the unit. If the unit
is connected to a remote start or transfer switch, make sure the remote
switch is also off and tagged.

1.2.2 Ground Connection

The generator must be connected to a good earthen ground for
proper operating safety!

A central “equipment ground” is provided at the customer connection
lugs. This point is connected directly to the generator set base. All
other system grounds are connected to this central point. Ground the
generator in accordance with the standards defined in national, state,
and local regulations.

1.2.3 DO NOT attempt to open the radiator cap while the unit is running or
before the engine has cooled down. Severe burns may result!

1.2.4 DO NOT allow water to accumulate around the base of the machine.
If water is present, move the machine and allow the machine to dry
before servicing.

1.2.5 DO NOT service the machine if your clothing or skin is wet.

1.2.6 DO NOT allow untrained personnel to service this equipment. Only
trained electrical technicians should be allowed to service the electrical
components of this equipment.

1.2.7 Do not modify the machine without the express written approval of the
manufacturer.

1.2.8 DO NOT pressure wash the control panel, generator end, or any other
electrical components when cleaning the machine. Never allow water
to accumulate around the base of the generator set. If water is present,
DO NOT service!

1.2.9 ALWAYS replace the safety devices and guards after repairs and
maintenance.

1.2.10 ALWAYS let the engine cool before transporting or servicing the
machine.

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G 25 Safety Information

1.2.11 ALWAYS remain aware of moving parts and keep hands, feet, and
loose clothing away from the moving parts of the machine.

1.2.12 ALWAYS replace all guards, fasten doors, and make sure all safety
devices operate properly after making repairs or servicing the
equipment.

1.2.13 ALWAYS keep hands, feet, and loose clothing away from the moving
parts on the generator and engine.

1.2.14 Keep the machine clean and labels legible. Replace all missing and
hard-to-read labels. Labels provide important operating instructions
and warn of dangers and hazards.

1.2.15 ALWAYS check all external fasteners at regular intervals.

1.2.16 ALWAYS make sure slings, chains, hooks, ramps, jacks, and other
types of lifting devices are attached securely and have enough weight­bearing capacity to lift or hold the machine safely. Always remain
aware of the location of other people in the area when lifting the
machine.

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Safety Information G 25

1.3 Operator Safety while using Internal Combustion Engines

Internal combustion engines present special hazards during operation
and fueling. Read and follow the warning instructions in the engine
owner’s manual and the safety guidelines below. Failure to follow the

WARNING

1.3.1 Do not run engine indoors or in an area with poor ventilation unless

1.3.2 Do not fill or drain the fuel tank near an open flame, while smoking, or

1.3.3 Do not refuel a hot or running engine.

1.3.4 Refill the fuel tank in a well-ventilated area.

1.3.5 Do not touch or lean against hot exhaust pipes.

1.3.6 Replace the fuel tank cap after refueling.

1.3.7 Do not start the engine if fuel has spilled or a fuel odor is present. Move

warnings and safety standards could result in severe injury or death.

exhaust hoses are used.

while the engine is running.

the generator away from the spill and wipe the generator dry before
starting.

1.3.8 Do not remove the radiator cap when the engine is running or hot. The
radiator fluid is hot and under pressure and may cause severe burns!

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G 25 Safety Information

1.4 Towing Safety

Towing a large trailer requires special care. Both the trailer and vehicle
must be in good condition and securely fastened to each other to
reduce the possibility of an accident.

WARNING

1.4.1 ALWAYS check that the hitch and coupling on the vehicle are rated
equal to, or greater than, the trailer’s “gross vehicle weight rating”
(GVWR).

1.4.2 ALWAYS inspect the hitch and coupling for wear or damage. DO NOT
tow the trailer using defective parts.

1.4.3 ALWAYS make sure the coupling is securely fastened to the vehicle.

1.4.4 ALWAYS check the tires on the trailer for tread wear, inflation, and
condition. Replace worn tires.

1.4.5 ALWAYS connect the safety chains.

1.4.6 ALWAYS connect the breakaway cable safety hook to the bumper or
rear of the vehicle. DO NOT attach it to the hitch.

1.4.7 ALWAYS test the surge brakes on the trailer and the brakes on the
vehicle that will be used for towing.

1.4.8 ALWAYS make sure directional and trailer lights are connected and
working properly.

1.4.9 ALWAYS check that the lug nuts holding the wheels are tight and that
none are missing.

1.5 Reporting Trailer Safety Defects

If you believe your trailer has a defect which could cause a crash or
could cause injury or death, you should immediately inform the
National Highway Traffic Safety Administration (NHTSA) in addition to
notifying Wacker Neuson Corporation.

If NHTSA receives similar complaints, it may open an investigation;
and if it finds that a safety defect exists in a group of vehicles, it may
order a recall and remedy campaign. However, NHTSA cannot
become involved in individual problems between you, your dealer, or
Wacker Neuson Corporation.

To contact NHTSA, you may either contact the Auto Safety Hotline toll­free at 1-800-424-9393 (or 366-0129 in Washington DC area),
www.nhtsa.com, or write to NHTSA, U.S. Department of
Transportation, 400 7th Street SW, (NSA-11), Washington, DC 20590.
You can also obtain other information about motor vehicle safety from
the Auto Safety Hotline.

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Safety Information G 25

1.6 Label Location

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G 25 Safety Information

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Safety Information G 25

1.7 Safety and Operating Labels

Ref. Label Meaning

A

TOWING INSTRUCTIONS ABSCHLEPPINSTRUKTIONEN INSTRUCCIONES DE REMOLQUE

1. READ OPERATOR'S MANUAL.

2. USE HITCH RATED FRO TRAILER'S
"GROSS VEHICLE WEIGHT RATING".

3. SECURELY ATTACH TRAILER TO TOW
VEHICLE.

4. ATTACH SAFETY CHAINS USING CROSS
PATTERN.

5. ATTACH BREAKDOWN CHAIN TO VEHICLE.

6. CHECK TRAILER LIGHTS.

1. BETRIEBSVORSCHRIFT LESEN.

2. ANHANGEVORRICHTUNG VERWENDEN,
DIE DER GESAMTBETRIEBSGEWICHTSKLASSE
ENTSPRICHT.

3. ANHANGER SICHER AM ZUGFAHRZEUG
BEFESTIGEN.

4. SICHERHEITSKETTEN KREUZWEISE ANBRINGEN.

5. ABREISSKETTE AM FAHRZEUG ANBRINGEN.

6. ANHANGERLEUCHTEN PRUFEN.

1. LEA EL MANUAL DEL OPERARIO.

2. UTILICE UN ACOPLE CORRECTAMENTE
CLASIFICADO PARA LA "CLASE DE PESO BUTO"
DEL VEHICULO DEL REMOLQUE.

3. ASEGURESE DE AMARRAR CORRECTAMENTE
EL REMOLQUE AL VEHICULO DE REMOLQUE.

4. FIJE EN CRUZ LAS CADENAS DE SEGURIDA D.

5. FIJE EN EL VEHICULO DE REMOLQUE LA CA DENA
DE DESPRENDIMIENTO.

6. CONTROLE LAS LUCES DEL REMOLQUE.

B WARNING!

Pressurized contents. Do not open when
hot!

C WARNING!

Lock doors. Access can cause electric
shock or injury.

D CAUTION

Lifting point.

INSTRUCTIONS DE REMORQUAGE

1. LIRE LA NOTICE D'EMPLOI.

2. UTILISER UN GROCHET D'ATTELAGE CONFORME AU
DEBIT NOMINAL DU POIDS BRUT DE VEHICULE DU
TRACTEUR.

3. ATTACHER LA REMORQUE FERMEMENT AU VEHICULE
TRACTEUR.

4. ATTACHER LES CHAINES DE SURETTE EN UTILISANT
UNE METHODE CROISEE.

5. ATTACHER LA CHAINE DE REMORQUAGE AU VEHICULE.

6. VERIFIER LES LAMPES DE LA REMORQUE.

114894

E NOTICE

Never change switch position with engine
running. Results in damage to machine.

WARNING!
Electric shock can cause serious injury or
death.

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G 25 Safety Information

Ref. Label Meaning
F DANGER!

Asphyxiation hazard. Read the Opera­tor’s Manual for instructions. No sparks,
flames, or burning objects near machine.
Stop the engine before adding fuel. Use
only diesel fuel.

G Tie-down point.

H WARNING!

To prevent hearing loss, wear hearing
protection.
Hand injury if entangled in moving belt.
Rotating machinery! Do not reach inside
with engine running.
WARNING!
Hot surface!
CAUTION!
Avoid spraying water into generator.

I WARNING!

Hot surface!

J Electrical ground

K WARNING!

Electric shock can cause serious injury or
death.

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Safety Information G 25

Ref. Label Meaning

L

M Operator’s Manual must be stored on

N DANGER!

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machine. Replacement Operator’s Man­ual can be ordered through your local
Wacker Neuson distributor.

Electric shock will cause serious injury or
death. Danger of asphyxiation!

G 25 Safety Information

Ref. Label Meaning
O WARNING!

Generator can automatically start which
can cause serious injury. Disconnect bat­tery before servicing.

P WARNING!

Read and understand the supplied Oper­ator’s Manual before operating the
machine. Failure to do so increases the
risk of injury to yourself or others.

Q WARNING!

To reduce the risk of electrical shock and
arc flash, read the Operator’s Manual.
Improper connection of the generator to
a building’s electrical system can allow
electrical current from the generator to
backfeed into utility lines. This may 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.

R Remote start operation. Read Operator’s

S CAUTION!

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Manual for instructions.

Receptacles not to be used when:
Selector switch set to 208/120V and volt­age greater than 228V.
Selector switch set to 480/277V and volt­age greater than 457V.

Safety Information G 25

Ref. Label Meaning
T WARNING!

Disconnect battery before servicing.
Read the Operator’s Manual.

U

V Operator’s Manual must be stored on

machine. Replacement Operator’s Man­ual can be ordered through your local
Wacker Neuson distributor.

W Drain containment system.

X WARNING!

To prevent hearing loss, wear hearing
protection when operating the machine.
WARNING!
Pressurized contents. Do not open when
hot!
WARNING!
Hand injury if entangled in moving belt.
WARNING!
Rotating machinery! Do not reach inside
machine with engine running.

Y Operating the main circuit breaker sup-

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plies or interrupts power to the customer
connection lugs.

G 25 Safety Information

Ref. Label Meaning
Z Neutral bonded to frame

AA Fuses

Read the Operator’s Manual for machine
information.
1 - Fuel Solenoid
2 - Fuel Pump
3 - Controller
4 - Not Used

BB WARNING!

Electric shock at cooling fins.

CC G 25 Generator and Receptacle Wiring

DD G 25 Engine Wiring

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Safety Information G 25

Ref. Label Meaning
EE WARNING!

Hot surface!

FF (if equipped)

CAUTION: Do not use battery disconnect
switch while engine is running. Damage
to electrical components may occur.

GG Low sulfur fuel or ultra low sulfur fuel

only.

HH

JJ

WARNING

Lock doors. Access can cause electric
shock, arc flash, or injury.

Protecting Our Environment

Fluid containment system
(if equipped)

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G 25 Safety Information

Ref. Label Meaning

\A nameplate listing the model number,
item number, revision number, 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 number, item number,
revision number, and serial number of
the unit.

This machine may be covered by one or
more patents.

Certification Label (VIN Number)
Also attached to each unit is a Certifica­tion Label. This label specifies that the
trailer conforms with all Federal Motor
Vehicle Standards in effect at the time of
manufacture. The label includes the Vehi­cle Identification Number (VIN) for the
trailer.

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Operation G 25

2. Operation

2.1 Control Panels

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G

E

R

N

E

C

M

Y

E

S

P

T

O

G 25 Operation

Ref. Description Ref. Description

a Main Circuit Breaker l Twist-Lock Receptacle

(120/240 VAC, 50Amp)

b Voltage Adjustment Rheostat m Twist-Lock Receptacle

(120/240 VAC, 30 Amp)

c Shutdown LED n GFI Receptacle

(120 VAC, 20 Amp) - two
d Pre-alarm LED o Remote Run Terminal Block
e LCD Panel p Emergency Stop Switch

f Engine Start Switch q Interlock Switch
g Engine Hours Switch r Customer Connection Terminal Lugs
h Circuit Breaker

s Ground Connection

(240V, 50 Amp)

j Circuit Breaker

t Bond bar

(240V, 30 Amp)

k Circuit Breaker (120V, 20

Amp) - two

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Operation G 25

2.2 Generator Monitoring

Generator information is displayed on the top line of the LCD panel and
is scrolled continuously while the generator is operating, to show the
voltage, amperage and frequency of each phase.

Note: To prevent the display from scrolling, press the engine hours
switch down.

Volts “V”- Displays the AC output voltage being produced by the
generator.

Phase “Ø” - Indicates which leg is currently being displayed.
Amps “A” - Displays the AC output amperage produced by the

generator. If the generator is operating at no-load, output amperage
will display a 0.

Hertz “Hz” - Displays output frequency. This gauge should read
approximately 61.5 Hz under a no-load condition. If the frequency is
too high, check the engine rpm.

208 1 24 61.5
78 85% 175 14.3

UNIT IN AUTO

Ø 100% 85 13.2

Sample display with engine running.

Sample display in “Auto” mode.

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G 25 Operation

Notes:

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Operation G 25

2.3 Engine Monitoring

With the engine start switch set to “RUN/START” or “REMOTE
START”, engine information will be continuously displayed on the
bottom line of the LCD panel.

OIL - Displays engine oil pressure. The gauge registers oil
pressure between 0–100 psi. Normal operating pressure is between
60–80 psi. If oil pressure drops below 15 psi, the engine will
automatically shut down.

FUEL - Indicates the relative fuel level in the fuel tank. If fuel
level drops to 5% the engine will automatically shut down.

TEMPERATURE - Displays the temperature of the engine's
coolant. If the coolant temperature gets too high, the engine will
automatically shut down.

BATTERY - This gauge measures the engine starting battery
voltage. A normal reading is 13.5–14.5V. If the gauge falls much
below or above these values, the engine charging system should be
checked. With the engine switch set to “REMOTE START” and the
generator in stand-by mode, actual battery voltage is displayed.

ENGINE HOURS - Pressing the switch UP causes the engine’s
running hours, the periodic maintenance timer, and the Engine Fault
set points to be displayed. Engine hours are accumulated only while
the engine is actually running.

Note: When held down, this switch can be used to lock in a specific
display for a single phase.

SENDER FAILURE - Indicates that the coolant temperature sensor or
the oil pressure sensor has failed. This fault will not be displayed
unless the fault has occurred; also, this fault will not shut down the
machine.

Engine Fault Set Points

Low Oil Pressure = 15 psi

High Temperature = 221°F

Underspeed = 55Hz (1650 rpm)

Overspeed = 67Hz (2000 rpm)

Overcrank = Three 10-second crank/rest cycles

Fuel Level = 5%

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G 25 Operation

Sample display of engine hours.

RUNNING HOURS

135.2

Sample display of periodic maintenance timer.

TIME TO SERVICE

180.2 hrs.

Sample display showing engine fault set
points.

LOP<15 HWT>225

OS>67

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Operation G 25

2.4 Engine Shutdown Faults

The Engine Control Module (ECM) continuously monitors vital engine functions for six
fault conditions. When a fault condition occurs, the engine will shut down and the LCD
panel will display the fault causing the shutdown. To reset the ECM and resume
operation, return the engine start switch manually to off “O”. Also refer to Section

Warning Light..

Indicates that the emergency stop button has

EMERGENCY

STOP

FAULT LOW OIL

PRESSURE 14

been depressed. This display will remain on
until the emergency stop button is pulled back
out.

Indicates that the engine oil pressure dropped
below 15 psi for more than 5 seconds and the
ECM has shut the engine down.

FAULT HIGH ENGINE

TEMPERATURE 255

FAULT

OVERSPEED 67

FAULT

OVERCRANK

LOW FUEL

Indicates that the engine coolant temperature
has exceeded 221°F for more than 5 seconds,
and the ECM has automatically shut down the
engine. Normal engine running temperature is
185°F±15°F (85°C±8°C).

Indicates that the engine speed exceeded
approximately 2000 rpm (110% of its rated
speed of 1800 rpm) and the ECM has auto­matically shut the engine down.

An overcrank fault is displayed when the
engine fails to start after three cycles of the
normal cranking cycle, and the ECM has auto­matically shut down the generator due to the
overcrank condition.

A low fuel fault condition will be displayed
when the fuel tank drops to 5% and the ECM
has shut down the engine. This fault condition
prevents the fuel lines from running completely
dry and avoids the need to bleed the lines
when the tank is refilled.

wc_tx000137gb.fm 30

G 25 Operation

Indicates that the engine speed dropped below
55Hz (1650 rpm) for more than 15 seconds

FAULT

UNDERSPEED 53

2.5 Current Overload Fault

Along with engine functions the ECM continuously monitors the current
load in each phase. The values for current overload are programmed
into the ECM at the factory and are different for each generator size.

and the ECM has automatically shut down the
engine.

FAULT

OVERLOAD

When an overload condition is sensed in any leg, the engine will shut
down and the LCD panel will display the fault condition shown above.

Before restarting the generator, the cause of the overload should be
determined and eliminated. Review all loads attached to the generator
and make sure they do not exceed the power rating of the unit.

2.6 Application

This heavy-duty, compact, sound-attenuated generator is designed to
provide single and three-phase power for construction, commercial,
and industrial applications where reliable power is needed.

NOTICE: Do not exceed the power output of the generator. Damage
to tools or generator will occur. Refer to Technical Data.

When using the generator as a stand-by or substitute power supply,
make sure the voltage and phase rotation of the line connections
match those of the utility lines or of any other power source normally
used. Failure to match phase rotation and voltage may cause

equipment connected to the generator to operate incorrectly!
This could create unsafe operating conditions.

NOTICE: DO NOT exceed the rated current limit of any receptacle.

wc_tx000137gb.fm 31

Operation G 25

2.7 Voltage Selector Switch

See Graphic: wc_gr001682

The voltage selector switch is located in a separate enclosure on the
generator on the opposite side of the machine.

The selector switch is a three-position switch which mechanically
changes the connections between the generator output leads and the
terminal lugs on the generator. This allows three different volt ranges
to be selected.

120/240 VAC 1Ø
120/208 VAC 3Ø
139/240 VAC 3Ø (Refer to Section Voltage Adjustment Rheostat.)
277/480 VAC 3Ø
Voltage ranges are selected by rotating the handle on the switch to the

desired voltage. The switch is equipped with a locking mechanism.
This allows the voltage setting to be locked in place to prevent
unauthorized personnel from changing the voltage selection. To lock
switch in position, push lock up and attach a padlock through the
openings in the locking strip.

WARNING

NOTICE: NEVER CHANGE THE VOLTAGE SELECTOR SWITCH
WITH THE ENGINE RUNNING. This can cause arcing and can
severely damage the switch and the generator windings.

ELECTROCUTION HAZARD! High voltage is present inside this
panel when the generator is operating!

wc_tx000137gb.fm 32

G 25 Operation

2.8 Emergency Stop Switch

See Graphic: wc_gr001677

The emergency stop switch (p) is the red button located below the
receptacle panel and can be accessed with the panel doors closed.

Activate the emergency stop switch by pushing the red button in.
Pushing the emergency stop switch opens the main circuit breaker and
the fuel solenoid, and results in the engine shutting down. The switch
will remain activated until the button is pulled out.

NOTICE: PRESS THE EMERGENCY STOP BUTTON ONLY IN THE
CASE OF AN ACTUAL EMERGENCY WHERE THE GENERATOR
MUST BE STOPPED IMMEDIATELY! In all other instances, open the
main line circuit breaker and then turn the engine start switch to off “O”.

G

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wc_gr001677

wc_tx000137gb.fm 33

Operation G 25

2.9 Main Line Circuit Breaker

See Graphic: wc_gr001683

The main line circuit breaker (c) is located on the control panel.
In the off “O” position, the main line circuit breaker interrupts power

from the selector switch to the terminal lugs at the bottom of the
generator panel. Power is also interrupted at the main line circuit
breaker when the customer connection lug door is opened.

NOTICE: Before shutting down the generator or performing any
service to the generator unit, make sure the main line circuit breaker is
in the off “O” position.

NOTICE: The convenience receptacles are not connected through the
main line circuit breaker but are connected directly to the generator
windings. As a result, the receptacles are powered even with the main
line circuit breaker in the off “O” position. To turn off power to
receptacles, open the individual circuit breakers provided for each.

DANGER

DANGER OF ELECTROCUTION! High voltage is present inside this
panel when the generator is operating! Never open the control panel
while the generator is in use.

wc_tx000137gb.fm 34

G 25 Operation

2.10 Engine Start Switch

See Graphic: wc_gr001683

The engine start switch (f) is a three-position switch: “REMOTE
START”, off “O”, and “START/RUN”. The “REMOTE START” position
is the normal setting used when using the generator as a back-up
power supply connected to a remote switch. In the REMOTE START
position, the generator is in stand-by mode and will not start until the
remote switch closes. In the “START/RUN” position, the switch
immediately starts the engine start cycle and activates the starter
motor to crank the engine. When set in the “REMOTE START” or
“START/RUN” position, the switch applies battery power to the control
module to turn on the LCD panel, and also energizes the engine’s
electrical system. In the off “O” position, power to the engine’s
electrical system, including the fuel solenoid, is disconnected.

2.11 Voltage Adjustment Rheostat

See Graphic: wc_gr001683

Just left of the controller display window is the voltage adjustment
rheostat (b). Use the rheostat to adjust the AC voltage output. Loosen
locking nut and turn adjusting screw clockwise to increase voltage,
counter-clockwise to decrease voltage. The voltage can be monitored
at the LCD panel.

2.12 Warning Light

See Graphic: wc_gr001683

The amber warning light (d) on the metering panel will turn on prior to
an engine fault condition occurring. This acts as a pre-alarm to call
attention to a potential fault condition. At the same time the warning
light goes on, the LCD panel will begin blinking to indicate which
engine function is approaching its fault value.

Engine Pre-alarm Set Points:

• Fuel Level = 15%

• High Temperature = 221°F

• Low Temperature = 70°F

• Low Oil Pressure = 20 psi

• Time to Service = 0 hours

• Sender Failure = engine coolant and oil pressure senders.

Note: Time to Service and Sender Failure faults will not shut down the
generator.

wc_tx000137gb.fm 35

Operation G 25

G

2.13 Connection Lugs

See Graphic: wc_gr001684

The customer connection lugs (r) are located on left at the bottom of
the panel behind a hinged door. The lugs provide connection points for
attachment of outside loads.

A large label like the one shown in section Terminal Connections is
attached to the inside of the terminal door. It shows the correct terminal
connections for selected voltages.

Connections to the lugs should be made by running the power cables
up under the lug door in the bottom of the panel and into the lug. Use
a 3/8 in. Allen wrench to tighten cable connections in place.

ELECTROCUTION HAZARD! High voltage is present inside this
panel when the generator is operating!

WARNIN

wc_tx000137gb.fm 36

G

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T

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G 25 Operation

2.14 Ground Connection

See Graphic: wc_gr001684

A ground connection (s) is located next to the terminal lugs. The unit
must have this ground lug connected to a good earthen ground for
proper operating safety in compliance with NEC and local standards.

2.15 Convenience Receptacles

See Graphic: wc_gr001684

The generator is equipped with one 120V/240V twist lock receptacle
(m) rated at 30A, and one 120V/240V twist lock receptacle (l) rated at
50A. The two 120V duplex receptacles (n) are equipped with ground
fault interrupts (GFI). Receptacles do not connect through the main
line circuit breaker. Each receptacle is protected by its own circuit
breaker (k) which is located directly above it. Power to the receptacles
is available any time the generator engine is running, even with the
main line circuit breaker open.

Note: For the G25, when the voltage selector switch is in the 480V/3Ø
position, voltage at the duplex receptacles is 139V, and voltage at the
30/50A receptacles is 139/240V. When the voltage selector switch is
in the 208V/3Ø position, voltage at the 30/50A receptacles is 120/
208V. When the voltage selector switch is in the 208V/3Ø position, the
voltage can be adjusted with the voltage adjustment rheostat (f) to
240V/3Ø. The voltage at the duplex receptacles is 139V, and voltage
at the 30/50A receptacles is 139/240V.

2.16 Remote Run Terminal Block

See Graphic: wc_gr001684

The remote run terminal block (o) is located just to the right of the 120V
duplex receptacles. It provides connection points for installation of a
remote start switch. When it is connected to a transfer switch, it allows
the generator to be used as a standby power supply.

2.17 Panel Door Interlock Switch

See Graphic: wc_gr001684

The customer connection lugs panel access door is equipped with an
interlock switch (q). When the door is opened this switch automatically
trips the main circuit breaker. Voltage to the receptacles will not be cut.

wc_tx000137gb.fm 37

Operation G 25

2.18 Terminal Connections

WARNING

WARNING

ALL CONNECTIONS TO THE TERMINALS MUST BE MADE BY A
TRAINED ELECTRICIAN.

BACKFEED FROM THE GENERATOR INTO THE UTILITY’S
DISTRIBUTION SYSTEM CAN CAUSE A 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 may 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.

ELECTROCUTION HAZARD! ALWAYS OPEN MAIN CIRCUIT
BREAKER AND SET ENGINE STOP SWITCH TO OFF “O”
BEFORE INSPECTING OR ATTEMPTING ANY CONNECTIONS TO
THE TERMINAL BLOCK! LETHAL VOLTAGE COULD BE
PRESENT ON THE TERMINAL LUGS!

wc_tx000137gb.fm 38

G 25 Operation

2.19 Before Starting

Before putting the generator into service, review each item on the
following checklist. Because generators are often run for long periods
of time unattended, it is important to make sure that the machine is set
up properly to reduce possible problems.

Failure to follow the procedures listed may cause injury to personnel or
damage to the generator. Be certain that all persons setting up the

WARNING

generator are certified or fully trained on the installation of the
generator.

• Check for any damage that might have been caused while towing to
the job site.

• Check to make sure no debris has lodged in vents, near radiator or
around fan. Check to make sure that the exhaust compartment is
clean and nothing is touching the muffler or exhaust pipes.

• Check that generator is level.

• Chock trailer wheels.

• Check that generator is grounded to a good earthen ground per local
regulations and NEC standards.

• Check engine oil, coolant and fuel levels, and fill as required.

• Determine voltage needs. Set voltage selector switch and make cor­rect terminal connections.

• Check that all electrical connections were made in compliance with
local regulations and NEC standards.

• Check fan belt and hoses on engine for loose connections or fraying.
Tighten or replace as required.

• Close and secure side panel access doors.

• Review and follow safety instructions found in the front of this manual.

wc_tx000137gb.fm 39

Operation G 25

2.20 Manual Start-up

See Graphic: wc_gr001682, wc_gr001677, wc_gr001683

Before starting the generator set, thoroughly review the pre-start-up
checklist in the previous section. Proceed with generator start-up only
after checking each item in that section.

Thoroughly read and make sure you understand the engine Operator’s
Manual supplied with the generator. Follow the steps below and the
illustration on the opposite page in the order listed.

When using the generator as a standby or substitute power supply,
make sure the voltage and phase rotation of the line connections

WARNING

2.20.1 Check position of Voltage Selector Switch and make sure it is set for

match those of the utility lines or of any other power source normally
used. Failure to match phase rotation and voltage may cause

equipment connected to the generator to operate incorrectly!
This could create unsafe operating conditions.

the desired voltage output. Lock the switch in place.

2.20.2 Make sure the Engine Start Switch (f) is in the off “O” position.

2.20.3 Turn main line circuit breaker (a) and convenience receptacle circuit
breakers to off “O”. This will disconnect all loads from the generator.

2.20.4 Move Engine Start Switch (f) to “REMOTE START” to check operation
of engine control module. The LCD panel should momentarily display
“SYSTEM OK” followed by “UNIT IN AUTO” and engine information.
Check fuel level and battery values.

Note: The amber Warning Light (d) will come on if the fuel level is
below 25%, or engine temperature is below 70°F. This will not prevent
the engine from starting.

2.20.5 Press in the Emergency Stop Button (p). The LCD panel should read
“EMERGENCY STOP”. Release the stop button after verifying the

display and return the Engine Start Switch to off “O”.

2.20.6 Start engine by moving the Engine Start Switch to the “START/RUN”
position.

After displaying “GLOW PLUG ON” sequence, the LCD display will
read “STARTING ENGINE” as the engine begins its crank cycle. The
normal cycle is for the engine to crank for 15 seconds, then rest for 10
seconds. This cycle will repeat three (3) times. If the engine does not
start within this time, the Engine Control Module will shut down the
engine and “FAULT OVERCRANK” will be displayed on the LCD
panel. To repeat crank cycle, return start switch to off “O” to reset
Engine Control Module. Allow starter motor to cool between start-up
attempts.

wc_tx000137gb.fm 40

G 25 Operation

2.20.7 After engine starts, allow it to warm up for a few minutes and check
readouts on LCD panel. The “TIME TO SERVICE” interval will be
displayed. Make sure battery charging system, oil pressure and engine
temperature readings are within normal ranges.

2.20.8 Check that AC voltage is correct. Voltage can be fine-adjusted by
turning the voltage adjustment rheostat (b) on the metering panel.

2.20.9 Check frequency. Under no-load conditions, frequency should read
around 61.5 Hz, dropping to near 60 Hz as the generator load is
switched on.

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wc_gr001677

wc_tx000137gb.fm 41

Operation G 25

2.21 Running the Generator

See Graphic: wc_gr001683

Leave the engine start switch (f) in the “START/RUN” position while
the generator is operating. If the generator was started using a remote
switch, leave engine start switch in the “REMOTE START” position.
Let the generator run for a few minutes to warm engine before closing
main circuit breaker.

Before closing breakers, make sure that any electrical devices
attached downstream from the generator will not start up

WARNING

WARNING

unexpectedly.

While the generator is running, check for excessive vibration, oil leaks,
or coolant leaks.

Before placing the engine start switch (f) in the “REMOTE
START” position, verify that the contacts on any remote switch linked

to the generator set are OPEN. This will prevent the generator from
immediately starting when the engine start switch is moved to the
“REMOTE START” position.

2.22 Engine Power Correction Factors

Performance data on Isuzu engines are measured at the following
standard conditions:

• 29.31 inches of mercury dry air pressure

• 600 feet altitude

• 0 % relative humidity

• 77°F air intake temperature

• 104°F fuel inlet temperature
Refer to the table to estimate the engine power decrease in percent,

as environmental factors vary from the standard conditions.

MODEL

G 25

Engine

Power

Decrease

in %

FUEL TEMP RISE

of 1.8°F

AIR TEMP RISE

of 10°F

0.17 1.50 3.00 0.10

ALTITUDE RISE

of 305 m (1000 ft)

RELATIVE HUMIDITY

RISE of 10%

wc_tx000137gb.fm 42

G 25 Operation

2.23 Shutting Down Generator

Check with other personnel on the jobsite and let them know that
power is being turned off. Make sure that the power shutdown will not
create any hazards by turning off devices such as pumps, heaters, or
lights that may need to be kept on.

2.23.1 Remove all loads from generator.

2.23.2 Open (turn to off “O”) main line circuit breaker.

2.23.3 Let engine run for approximately 5 minutes to allow it to cool down.

2.23.4 Move engine start switch to the off “O” position.

2.24 Cold Weather Start-up

Good cold weather starting requires that the battery be at peak power,
the correct weight motor oil is used, and the starter motor is in good
condition. The ECM will automatically activate the cold starting aid
when the temperature is low enough and will display “GLOW PLUG
ON”.

2.25 Lifting

A central lifting eye is located at the top of the generator and is
attached to a lifting frame inside the housing.

Crushing / machine damage hazard. Make sure the lifting devices
have sufficient capacity to lift the unit safely. Refer to Technical Data

WARNING

for the proper operating weight of the generator.
When lifting the generator, attach a hook or sling securely to the lifting

eye.

2.26 Overnight Storage

When storing unit overnight, make sure all access doors are closed
and padlocked.

DO NOT store generator overnight in a low lying area that might fill with
water during a heavy storm.

2.27 Long-term Storage

If the generator is being stored for several months, follow the engine
manufacturer’s recommendations for long-term storage. These
procedures are designed to help minimize engine corrosion.

wc_tx000137gb.fm 43

Operation G 25

2.28 Automatic/Remote Start-up

In the “REMOTE START” position the generator can be started
remotely, either through a transfer switch or some other type of remote
start switch. “REMOTE START” is the normal setting when using the
generator as a standby power supply. Before placing the generator in
the automatic start-up mode, review the pre-start and manual Start-up
sections in this manual and follow procedure below.

Before placing the Engine Start Switch (f) in the “REMOTE
START” position, verify that the contacts on any remote switch linked

WARNING

2.28.1 Perform a manual start at least once to verify that the metering panel

2.28.2 If a check of auto start-up circuit is desired, attach a short jumper wire

to the generator set are OPEN. This will prevent the generator from
immediately starting when the Engine Start Switch is moved to the
“REMOTE START” position.

is operating correctly. Refer to Section Before Starting and Manual
Start-up sections in this manual.

(minimum 16 gauge insulated) between the two terminals on the
remote run terminal block. This applies a ground to the Engine Control
Module to complete the start circuit. The engine should crank, start and
run.

Move the Engine Start Switch to off “O” to stop engine. Remove jumper
from remote run terminals after testing is complete.

2.28.3 Secure generator by closing and locking all doors.

2.28.4 Set Engine Start Switch to “REMOTE START” and close main line
circuit breaker.

The generator is now ready for automatic start-up.
If the generator is to be used as a stand-by power supply for more than

a month, provisions must be made to maintain battery charge. This can
be done either by attaching a battery charger to the battery or by
starting generator manually and running engine periodically to
maintain charge. See Section Manual Start-up.

wc_tx000137gb.fm 44

G 25 Operation

2.29 Remote/Transfer Switch

When the generator is used as a stand-by power supply, it must be
equipped with a device which isolates it from the utility’s distribution
system.

WARNING

Failure to isolate the generator from the utility’s electrical
distribution system could cause output from the generator to
backfeed into the utility lines and cause injury or death to utility
workers!

The same is true if using the generator as a backup to some other type
of power supply system.

A transfer switch is designed to transfer electrical loads from the
normal power source (utility) to the emergency power source
(generator) when normal voltage falls below a prescribed level.

The transfer switch automatically returns the load back to the normal
source when power is restored back to operating levels.

Installation of a transfer switch or other type of remote starting device
is the responsibility of the generator user. Installation of such devices
must be performed by a qualified electrician following all directions
supplied by the manufacturer of the switch. If attaching generator to a
power supply normally serviced by a utility company, notify the utility
company and check local and state regulations. Familiarize yourself
with all instructions and warning labels supplied with the switch.

WARNING

DANGER

The bond bar connecting the neutral and ground lugs may need to be
removed for stand-by power applications. Check with NEC and local
regulations for compliance requirements.

When using the generator as a stand-by or substitute power supply,
make sure the voltage and phase rotation of the line connections
match those of the utility lines, or of any other power source normally
used. Failure to match phase rotation and voltage may cause

equipment connected to the generator to operate incorrectly!
This could create unsafe operating conditions.

Lethal voltage is always present in the transfer switch once it has been
properly installed!

wc_tx000137gb.fm 45

Operation G 25

2.30 Towing

See Graphic: wc_gr000510

The generator trailer is equipped with brakes, lights, and coupler
connection. Before towing the generator, perform the following:

2.30.1 Check that the towing vehicle and hitch have a rating equal to or
greater than the GVWR. Refer to the Technical Data.

2.30.2 Check the condition of both the coupler and hitch. DO NOT tow the
trailer if the coupler or hitch is damaged.

2.30.3 Make sure that the hitch and coupler are compatible. The generator
trailer is equipped with either a pintle type coupler (a) or 50 mm (2 in.)
ball coupler.

2.30.4 Check that the directional and running lights on the trailer are working.

2.30.5 Connect the safety chains (c) using a crossed pattern under the trailer
tongue.

2.30.6 On trailers with surge or electric brakes, connect the breakaway cable
(b) on the trailer coupler to the rear bumper or frame of the vehicle.
This cable will actuate the brake system on the trailer if both the
coupling and safety chains have failed. The breakaway cable is not a
parking brake and should not be used as one.

2.30.7 Check that all fasteners on the coupling are secure.

2.30.8 Check the tread wear and inflation of tires. Make sure that all lug nuts
are in place and are tight.

2.30.9 Check the operation of the optional surge brakes by braking the
vehicle at a slow speed before entering traffic. Both the vehicle and the
trailer should brake smoothly. If the trailer seems to be pushing, check
the fluid level (d) in the surge brakes or the operation of the electric
brakes.

A film of grease on the coupler will extend coupler and ball life and
eliminate squeaking. Wipe the coupler and ball clean and apply fresh
grease each time the trailer is towed.

NOTICE: When towing, maintain extra space between vehicles and
avoid soft shoulders, curbs and sudden lane changes. If you have not
pulled a trailer before, practice turning, stopping, and backing up in an
area away from heavy traffic.

DO NOT exceed 55 mph when towing a trailer.
In most states, large trailers must be registered and licensed by the

State Department of Transportation. Before towing, be sure to check
licensing requirements.

wc_tx000137gb.fm 46

G 25 Operation

d

a

c b

w c _ g r 0 0 0 5 1 0

wc_tx000137gb.fm 47

Maintenance G 25

3. Maintenance

3.1 Periodic Maintenance Schedule

The chart below lists basic machine and engine maintenance. Refer to
your engine operator’s manual for additional information on engine
maintenance.

Daily 50 hr

Check engine oil and coolant level.

Check air dust cleaner valve and restriction
indicator*.

Visual walkaround inspection.

Check tire inflation, tread wear and lug nuts
before towing.

Check exhaust system.

Check fuel filter. 

Drain containment system.

Service the battery.

Change engine oil and replace oil filter**.

Clean unit inside and out.

Check air intake hoses, connections, and
system.

250 hr600 hr

or 2

weeks



















or

12 Mo



1200
hr or

24 Mo

2000 hrOther

Replace fuel filter element.

Check automatic belt tensioner and belt wear.

Check cooling system.

Perform coolant solution analysis and add
SCA's (Supplemental Coolant Additives).

Grease axle.











Pressure test cooling system.

Flush cooling system.

Check and adjust engine valve clearance.

Check brake fluid level in trailer at least
monthly.

*Replace primary air cleaner when restriction indicator shows a vacuum of 20 in. H2O.
**Change the oil after the first 50 hours, then every 250 hours.

wc_tx000197gb.fm 48









G 25 Maintenance

3.2 New Machines

3.2.1 Run generator at least 60–100% of continuous load for the first 100
hours.

3.2.2 Change engine oil and replace oil filter after the first 50 hours.

3.3 Resetting the Periodic Maintenance Timer

After maintenance has been performed on the generator, it is
necessary to reset the periodic maintenance timer.

• If the periodic maintenance timer is at zero, press the ENG. HRS
switch UP and hold for 10 seconds until the “TIME TO SERVICE”
resets to 250 hours.

• If the service time is greater than zero (maintenance was performed
prior to the timer running out) press and hold the ENG. HRS switch UP
and hold for 30 seconds. This will reset the “TIME TO SERVICE” to
250 hours.

wc_tx000197gb.fm 49

Maintenance G 25

3.4 Air Cleaner

See Graphic: wc_gr001685

Replace the air filter cartridge (c) when yellow indicator of the engine
air filter gauge reaches the red line.

To replace the air filter cartridge:

• Remove the end cover (d), then discard the entire air filter cartridge.

• Insert a new air filter cartridge, then

• Re-install the end cover, making sure that the dust cap (e) is clean
and is pointing downward.

Periodically, make sure the inlet pipe (f) is free from obstructions.
Check all connections and make sure they are snug. An air leak at the

neck clamp, gauge connection, or intake pipe can quickly lead to
expensive engine repairs.

• Make sure that the intake piping (a) is fully engaged over the neck
of the filter to ensure a good seal.

• If the filter housing, gauge connection (b), neck, or inlet pipe are
crushed or damaged, replace them immediately.

f

c

d

b

a

3.5 Engine Lubrication

Check engine oil daily before starting engine.
DO NOT operate engine if oil level is below ADD mark on dipstick.

Always keep oil level within the crosshatch pattern or “full” mark on
dipstick.

Change oil after first 50 hours of operation and every 250 hours
thereafter. Refer to the engine manufacturer’s operator’s manual for

lubrication specifications.

wc_tx000197gb.fm 50

e

wc_gr001685

G 25 Maintenance

3.7 Engine Coolant

Check the coolant level of the radiator with the engine cold. After initial
filling of radiator to 3/4 inch below bottom of filler neck, maintain proper
level in overflow bottle daily.

NEVER remove radiator cap or drain plug while engine is hot!
Pressurized coolant can cause serious burns.

WARNING

Shut off engine. Only remove radiator cap when it is cool enough to
touch with bare hands. Slowly loosen cap to relieve pressure first,
before removing it completely.

3.7 Trailer Maintenance

Tires - Keep tires inflated to the proper pressure as shown on the tire

sidewall, and check tread periodically for wear. Replace tires as
required.

Wheels - Check that lug nuts holding wheels are tight. Replace any
missing nuts immediately.

Axle Hubs - Grease axle hubs through grease fittings using a good
wheel bearing grease.

Brakes - Check operation of brakes before each trip.

Check level of brake fluid in actuator at front of trailer at regular
intervals. Fill to approximately 25mm (1 in.) below top of reservoir
using DOT-3 heavy-duty brake fluid. Tighten filler plug securely.

Note: If fluid level has fallen too low, bleed brake lines to remove any
air trapped in lines.

wc_tx000197gb.fm 51

Maintenance G 25

3.8 Troubleshooting Automatic Shutdown

There are six automatic shutdown conditions: low oil pressure, high
coolant temperature, engine overspeed, engine underspeed, engine
overcrank and low fuel. When these occur, the operator can perform
certain diagnostic tests to help identify the problem. Most of these
diagnostics deal with the engine.

The generator, however, can also cause problems. Consult a qualified
electrician or your nearest Wacker Neuson dealer for possible causes
of generator problems.

Anytime the generator is down for service, secure it by closing and
locking all doors, and hang a "DO NOT RUN" sign on the metering
panel.

WARNING

Low Oil Pressure Shutdown

3.8.1 Check engine oil level using dipstick. Add oil if required.

3.8.2 Carefully inspect engine for oil leaks.

3.8.3 If oil level is good, start engine and verify loss of oil pressure. Shut
down engine immediately if oil pressure value does not read at least
15 psi within 5 seconds.

Check the oil pressure shutdown sender and connecting wiring on the
engine block. Check for continuity between sender and engine control
module. See wiring diagrams.

3.8.4 If oil level, oil pressure sender and connecting wiring are good, the fault
could be caused by an engine failure.

Note: An engine failure caused by something other than one of the six
shutdown conditions discussed will cause a low oil fault condition to be
displayed.

High Coolant Temperature Shutdown

3.8.1 Restart engine and read water temperature. Stop engine if
temperature is above 221°F. Normal engine operating temperature is
between 170°-190°F.

3.8.2 Allow engine to cool to a safe temperature and inspect coolant level in
radiator. Add coolant as needed.

3.8.3 Carefully inspect coolant hoses and engine block for leaks.

3.8.4 Check that fan belt for water pump is tight.

3.8.5 Check the high temperature shutdown sender and connecting wiring
on engine block. Check for continuity between sender on engine block
and engine control module. See wiring diagrams.

3.8.6 If sender and wiring are good, consult engine manufacturer’s
Operator’s Manual or Service Manual for possible causes of engine
overheating.

wc_tx000197gb.fm 52

G 25 Maintenance

Overspeed or Underspeed Shutdown

Restart engine and read the AC frequency meter. Meter should read
aproximately 61.5 Hz under no-load condition.

If frequency is high, adjust engine rpm for correct frequency
(approximately 1850 rpm).

Overcrank Shutdown

3.8.1 Check fuel level.

3.8.2 Check for proper operation of fuel pump.

3.8.3 If engine still does not start, refer to engine manufacturer’s Operator’s
Manual or Service Manual for possible engine problems.

Low Fuel Level Shutdown

3.8.1 Check fuel level.

Note: Warning light will come on when fuel level drops below 25%.
Engine will shut down only when level drops below 5%.

3.8.2 Check for leaks in fuel tank.

3.8.3 If fuel level is good, check fuel level sender and connecting wiring on
engine. Check for continuity between sender on tank and engine
control module. See wiring diagrams.

wc_tx000197gb.fm 53

Maintenance G 25

3.9 Generator and Receptacle Wiring

BOM Revision See Graphic: Revision See Graphic:

0009368 104–123 wc_gr003169 103 & lower wc_gr001686
0009368 124 & higher wc_gr004611 — —
0009466 105–128 wc_gr003169 104 & lower wc_gr001686
0009466 129 & higher wc_gr004611 — —
0620004 104–127 wc_gr003169 103 & lower wc_gr001686
0620004 128 & higher wc_gr004611 — —
0620344

0620345
0620346
0620706

— wc_gr004611

Ref. Description Ref. Description

1 Lug safety limit switch 14 Buss bar
2 Mechanical lugs 15 Voltage Selector Switch
3 Plug 3 - current transformer 16 Generator
4 Plug 4 - line voltage inputs 17 Voltage regulator with 4A fuse
5 Shunt 18 Voltage adjustment rheostat
6 120V GFI receptacle 19 Terminal Block
7 120V 20A breaker 20 Exciter rotor windings
8 240V 50A breaker 21 Exciter stator winding

9 240V 30A breaker 22 Rotor
10 240V 50A receptacle 23 Rectifier (diodes)
11 240V 30A receptacle 24 Main rotor winding
12 Engine control module 25 Main stator windings
13 Main Breaker 26 Auxiliary Stator Winding

– — 27 Stator

B Black R Red Y Yellow Or Orange
G Green T Tan Br Brown Pr Purple
L Blue V Violet Cl Clear Sh Shield
P Pink W White Gr Gray LL Light blue

wc_tx000197gb.fm 54

Wire Colors

G 25 Maintenance

wc_tx000197gb.fm 55

Maintenance G 25

BOM Revision See Graphic: Revision See Graphic:

0009368 104–123 wc_gr003169 103 & lower wc_gr001686
0009368 124 & higher wc_gr004611 — —
0009466 105–128 wc_gr003169 104 & lower wc_gr001686
0009466 129 & higher wc_gr004611 — —
0620004 104–127 wc_gr003169 103 & lower wc_gr001686
0620004 128 & higher wc_gr004611 — —
0620344

— wc_gr004611
0620345
0620346
0620706

Ref. Description Ref. Description

1 Lug safety limit switch 14 Buss bar
2 Mechanical lugs 15 Voltage Selector Switch
3 Plug 3 - current transformer 16 Generator
4 Plug 4 - line voltage inputs 17 Voltage regulator with 4A fuse
5 Shunt 18 Voltage adjustment rheostat
6 120V GFI receptacle 19 Terminal Block
7 120V 20A breaker 20 Exciter rotor windings
8 240V 50A breaker 21 Exciter stator winding

9 240V 30A breaker 22 Rotor
10 240V 50A receptacle 23 Rectifier (diodes)
11 240V 30A receptacle 24 Main rotor winding
12 Engine control module 25 Main stator windings
13 Main Breaker 26 Auxiliary Stator Winding

– — 27 Stator

B Black R Red Y Yellow Or Orange
G Green T Tan Br Brown Pr Purple
L Blue V Violet Cl Clear Sh Shield
P Pink W White Gr Gray LL Light blue

wc_tx000197gb.fm 56

Wire Colors

G 25 Maintenance

wc_tx000197gb.fm 57

Maintenance G 25

BOM Revision See Graphic: Revision See Graphic:

0009368 104–123 wc_gr003169 103 & lower wc_gr001686
0009368 124 & higher wc_gr004611 — —
0009466 105–128 wc_gr003169 104 & lower wc_gr001686
0009466 129 & higher wc_gr004611 — —
0620004 104–127 wc_gr003169 103 & lower wc_gr001686
0620004 128 & higher wc_gr004611 — —

Ref. Description Ref. Description

1 Lug safety limit switch 11 240V 30A receptacle

2 Mechanical lugs 12 Engine control module

3 Buss bar 13 Plug 4 - line voltage inputs

4 Main breaker 14 Plug 3 - current transformer inputs

5 Shunt 15 Voltage Selector Switch

6 120V GFI receptacle 16 Generator

7 120V 20A breaker 17 Voltage regulator with 4A fuse

8 240V 50A breaker 18 Voltage adjustment rheostat

9 240V 30A breaker 19 Terminal Block
10 240V 50A receptacle - ---

Wire Colors

B Black R Red Y Yellow Or Orange
G Green T Tan Br Brown Pr Purple
L Blue V Violet Cl Clear Sh Shield
P Pink W White Gr Gray LL Light blue

wc_tx000197gb.fm 58

G 25 Maintenance

wc_tx000197gb.fm 59

Maintenance G 25

3.10 Trailer Wiring

Ref. Description

1 Front right side amber light
2 Front left side amber light
3 Trailer plug
4Battery
5 Brake solenoid
6 Right tail light
7 License plate holder lights
8 Left tail light
9 Rear right side red light

10 Rear left side red light

Ref. Wire Colors Rear Lights Side Lights Harness
B BLACK Ground Ground Battery charge
Br BROWN Tail light Tail, side and license plate
L BLUE
R RED Brake light Power Electric brakes
Y YELLOW Left brake light and directional
G GREEN Right brake light and directional
W WHITE Ground

wc_tx000197gb.fm 60

G 25 Maintenance

Standard and Hydraulic Brakes

3

G
Y
B r

W

Electric Brakes

1

B r

2

1

Br W

1 0

9

B rWW

B r WB r W

w c _ g r 0 0 0 5 2 2

9

Br

G

B r

6

W

B r

7

B r

7

Y

B r

8

W

W

G
Y
Br
W

R

G
Br

6

W

R

3

R
R

Br W

R

4

R

W

+–

2

5

R

W

5

R

Br W

10

W

Br

7

7

Br

Y

Br

8

W

wc_gr000523

wc_tx000197gb.fm 61

Maintenance G 25

3.11 Engine Wiring

BOM Revision See Graphic: Revision See Graphic: Revision See Graphic:

0009368 107–123 wc_gr003217 106 wc_gr003170 105 & lower wc_gr001687
0009368 124 & higher wc_gr004609 – – – –
0009466 111–128 wc_gr003217 110 wc_gr003170 109 & lower wc_gr001687
0009466 129 & higher wc_gr004609 – – – –
0620004 108–127 wc_gr003217 107 wc_gr003170 106 & lower wc_gr001687
0620004 128 & higher wc_gr004609 – – – –
0620344

0620345
0620346
0620706

— wc_gr004609

–– – –

Ref. Description Ref. Description

1 Engine control module 13 Glow plug solenoid

2 Plug 1 - engine sender inputs 14 Fuel relay

3 Plug 2 - engine start outputs 15 Starter relay

4 Oil pressure sender 16 Emergency stop switch

5 Water temperature sender 17 Remote start terminals

6 Remote start-Off-Start/Run 18 Battery

7 Magnetic pickup 19 Starter motor

8 Fuel pump 20 Alternator

9 Fuel solenoid 21 Mechanical lugs
10 10A fuse 22 Main circuit breaker - Shunt trip
11 25A fuse 23 Fuel level sender
12 Glow plugs 24 Lug door interlock switch

B Black R Red Y Yellow Or Orange
G Green T Tan Br Brown Pr Purple
L Blue V Violet Cl Clear Sh Shield
P Pink W White Gr Gray LL Light blue

wc_tx000197gb.fm 62

Wire Colors

G 25 Maintenance

wc_tx000197gb.fm 63

Maintenance G 25

BOM Revision See Graphic: Revision See Graphic: Revision See Graphic:

0009368 107–123 wc_gr003217 106 wc_gr003170 105 & lower wc_gr001687
0009368 124 & higher wc_gr004609 – – – –
0009466 111–128 wc_gr003217 110 wc_gr003170 109 & lower wc_gr001687
0009466 129 & higher wc_gr004609 – – – –
0620004 108–127 wc_gr003217 107 wc_gr003170 106 & lower wc_gr001687
0620004 128 & higher wc_gr004609 – – – –
0620344

0620345
0620346
0620706

— wc_gr004609

–– – –

Ref. Description Ref. Description

1 Engine control module 13 Glow plug solenoid

2 Plug 1 - engine sender inputs 14 Fuel relay

3 Plug 2 - engine start outputs 15 Starter relay

4 Oil pressure sender 16 Emergency stop switch

5 Water temperature sender 17 Remote start terminals

6 Remote start-Off-Start/Run 18 Battery

7 Magnetic pickup 19 Starter motor

8 Fuel pump 20 Alternator

9 Fuel solenoid 21 Mechanical lugs
10 10A fuse 22 Main circuit breaker - Shunt trip
11 25A fuse 23 Fuel level sender
12 Glow plugs 24 Lug door interlock switch

B Black R Red Y Yellow Or Orange
G Green T Tan Br Brown Pr Purple
L Blue V Violet Cl Clear Sh Shield
P Pink W White Gr Gray LL Light blue

wc_tx000197gb.fm 64

Wire Colors

G 25 Maintenance

wc_tx000197gb.fm 65

Maintenance G 25

BOM Revision See Graphic: Revision See Graphic: Revision See Graphic:

0009368 107–123 wc_gr003217 106 wc_gr003170 105 & lower wc_gr001687
0009368 124 & higher wc_gr004609 – – – –
0009466 111–128 wc_gr003217 110 wc_gr003170 109 & lower wc_gr001687
0009466 129 & higher wc_gr004609 – – – –
0620004 108–127 wc_gr003217 107 wc_gr003170 106 & lower wc_gr001687
0620004 128 & higher wc_gr004609 – – – –
0620344

0620345
0620346
0620706

— wc_gr004609

–– – –

Ref. Description Ref. Description

1 Engine control module 13 Glow plug solenoid

2 Plug 1 - engine sender inputs 14 Fuel relay

3 Plug 2 - engine start outputs 15 Starter relay

4 Oil pressure sender 16 Emergency stop switch

5 Water temperature sender 17 Remote start terminals

6 Remote start-Off-Start/Run 18 Battery

7 Magnetic pickup 19 Starter motor

8 Fuel pump 20 Alternator

9 Fuel solenoid 21 Mechanical lugs
10 10A fuse 22 Main circuit breaker - Shunt trip
11 25A fuse 23 Fuel level sender
12 Glow plugs 24 Lug door interlock switch

B Black R Red Y Yellow Or Orange
G Green T Tan Br Brown Pr Purple
L Blue V Violet Cl Clear Sh Shield
P Pink W White Gr Gray LL Light blue

wc_tx000197gb.fm 66

Wire Colors

G 25 Maintenance

Br

wc_tx000197gb.fm 67

Maintenance G 25

BOM Revision See Graphic: Revision See Graphic: Revision See Graphic:

0009368 107–123 wc_gr003217 106 wc_gr003170 105 & lower wc_gr001687
0009368 124 & higher wc_gr004609 – – – –
0009466 111–128 wc_gr003217 110 wc_gr003170 109 & lower wc_gr001687
0009466 129 & higher wc_gr004609 – – – –
0620004 108–127 wc_gr003217 107 wc_gr003170 106 & lower wc_gr001687
0620004 128 & higher wc_gr004609 – – – –
0620344

0620345
0620346
0620706

— wc_gr004609

–– – –

Ref. Description Ref. Description

1 Engine control module 13 Glow plug solenoid

2 Plug 1 - engine sender inputs 14 Fuel relay

3 Plug 2 - engine start outputs 15 Starter relay

4 Oil pressure sender 16 Emergency stop switch

5 Water temperature sender 17 Remote start terminals

6 Remote start-Off-Start/Run 18 Battery

7 Magnetic pickup 19 Starter motor

8 Fuel pump 20 Alternator

9 Fuel solenoid 21 Mechanical lugs
10 10A fuse 22 Main circuit breaker - Shunt trip
11 25A fuse 23 Fuel level sender
12 Glow plugs 24 Lug door interlock switch

B Black R Red Y Yellow Or Orange
G Green T Tan Br Brown Pr Purple
L Blue V Violet Cl Clear Sh Shield
P Pink W White Gr Gray LL Light blue

wc_tx000197gb.fm 68

Wire Colors

G 25 Maintenance

wc_tx000197gb.fm 69

Factory-Installed Options G 25

4 Factory-Installed Options

This machine may be equipped with one or more of the following factory-installed
options. To verify if any of these options are installed on your machine, contact Wacker
Neuson Corporation at 1-800-770-0957. A nameplate listing the Model Number, Item
Number, Revision, and Serial Number is attached to each unit. Please have this
information available when contacting Wacker Neuson Corporation.

4.1 Block Heater

See Graphic: wc_gr001709

The engine block heater option includes a block heater (a) with a cord
(b). The function of the block heater is to heat the engine coolant/

engine block to improve cold-weather engine starting. Plug the cord
into a 120V power supply.

wc_tx000853gb.fm 70

G 25 Factory-Installed Options

4.2 Fuel/Water Separator

See Graphic: wc_gr001705

The fuel/water separator separates water from the fuel on models with
Isuzu engines. Empty the separator water bowl (a) as needed by
opening the water bowl drain (b). The separator element should be
changed each time the fuel filter is changed—approximately every 600
hours of operation.

To change the element:

4.2.1 Loosen the element retainer (d) and remove the retainer and element
(c) from the separator head.

4.2.2 Unscrew the water bowl from the element.

wc_tx000853gb.fm 71

Factory-Installed Options G 25

4.3 Automatic LCD Heat

See Graphic: wc_gr001723, wc_gr001724

To improve the performance of the LCD panel in cold weather, the
LCD panel control module is equipped with an LCD heater. The heater
draws power from the panel control module and is active only when the
panel control module is powered.

An optional thermostat can be installed if the machine is to be used in
extremely cold weather. The thermostat automatically powers the
panel control module when the temperature drops to approximately

-30°C (-22° F). This activates the heater to prevent damage to the LCD
panel.

It is important to note that the panel control module draws a small
amount of power from the battery when turned on—even when the
machine is not running. If the battery should fail, the heater will also fail.
Be sure to keep the battery charged when the generator is not in use.

wc_tx000853gb.fm 72

G 25 Factory-Installed Options

4.4 Low Coolant Shutdown

See Graphic: wc_gr001708

The low-coolant shutdown system consists of an electronic sensor that
monitors coolant level. The sensor (a) is mounted to the radiator and
wired into the ECM. The sensor probe (b) is submerged in radiator
coolant. If the probe senses no coolant, it sends a signal to the ECM.
The ECM program includes a 10-second timer to protect from
nuisance shutdowns. If after the ten seconds coolant levels are still
sensed as being low, the ECM shuts down the engine. The ECM will
then display LOW COOLANT LVL. Allow the engine to cool before
adding additional coolant.

NEVER remove the radiator cap while the engine is hot! Pressurized

WARNING

coolant can cause serious burns.

If it is necessary to open the radiator, only do so with the engine off,
and only when coolant is cool enough to touch with bare hands. Slowly
loosen the radiator cap to relieve pressure first, before removing it
completely.

Note: The sensor may be disabled by unplugging the wire harness.
This action will not shut down the machine.

wc_tx000853gb.fm 73

Factory-Installed Options G 25

4.5 Temperature-Activated Shutters

See Graphic: wc_gr005770, wc_gr001707

The shutters (a) are mounted to the top of the generator enclosure.
The shutters are designed to keep the engine compartment warm, thus
increasing engine temperature during cold weather operation. The
shutters are activated through a wax-pellet actuator (b) that is
connected to the generator's cooling system. As radiator coolant
warms, the wax-pellet actuator engages a linkage (c) that opens the
shutters. As the coolant cools, the shutters close.

4.6 Lockable Battery Disconnect

See Graphic: wc_gr004338

A lockable ON/OFF switch is available which disconnects the battery.
A padlock (not included) securely locks the switch in the OFF position.
If equipped, the battery disconnect switch is mounted to the upper skid
beneath the access door on either the right or left side of the machine.

NOTICE: Do not use the battery disconnect switch while the engine is
running. Damage to electrical components may occur.

wc_tx000853gb.fm 74

G 25 Factory-Installed Options

4.7 Extended Run Tank

An extended run, 135-gallon fuel tank provides a 70-hour run time
under a continuous full load. The long run time eliminates the need for
daily refueling, saving money on fuel deliveries. The tank is fully fluid­contained and is ideal for remote or weekend running of equipment
such as dewatering submersible pumps.

4.8 Battery Charger

An optional battery charger maintains the battery at peak power while
the machine is turned off. Use of a battery charger is recommended
when the generator is not operated on a regular basis. The battery
charger prevents voltage drain and reduces the possibility of having to
jump-start the engine after long periods of inactivity.

wc_tx000853gb.fm 75

wc_gr005779

Factory-Installed Options G 25

G

N

CL3

CL2

CL1

CAMLOCK
RECEPTACLES

G

BOND
BAR

N

L3

L2

L1

ORG

CAMLOCK
LIMIT
SWITCH

BLU/W

BLU

BLU

LUG SAFETY
LIMIT
SWITCH

RED

ORG/W

ORG

MECHANICAL
LUGS

ORG

ORG

BLU/W

TO GENERATOR

TO E-STOP
(WIRE 44)

TO AVR PIN 3A

TO TERM BLK
(WIRE 2)

4.9 Cam-Lock

See Graphic: wc_gr002584

A second optional outlet panel features camlock connectors (u) for
easy tool changes. The door is equipped with an interlock switch (q).
When the door is opened this switch automatically trips the main circuit
breaker.

ORG

BLU/W

CAMLOCK
LIMIT
SWITCH

BLU

TO TERM BLK
(WIRE 2)

TO GENERATOR

TO AVR PIN 3A

TO E-STOP
(WIRE 44)

wc_tx000853gb.fm 76

RED

BLU/W

ORG

BLU

LUG SAFETY
LIMIT
SWITCH

ORG

ORG/W

ORG

L1

CL1

CAMLOCK
RECEPTACLES

CL2

CL3

L3

L2

N

N

BOND
BAR

G

MECHANICAL
LUGS

G

G 25 Factory-Installed Options

4.10 Containment System

See Graphic: wc_gr002647

Overspills and leaks are captured in the containment system. The
containment system holds over 110% of the fluid contained in the
machine.

The containment system should be checked every 50 hours or 2
weeks and drained when necessary. If fluid is found in the containment
tank, trace the cause of the leak and correct.

Note: In the interests of environmental protection, place impermeable
sheeting and a container under the machine to collect the liquid which
drains off. Dispose of this liquid in accordance with environmental
protection legislation.

wc_tx000853gb.fm 77

Factory-Installed Options G 25

4.11 Wiring Diagram—Factory-Installed Options

B Black R Red Y Yellow Or Orange
G Green T Tan Br Brown Pr Purple
L Blue V Violet Cl Clear Sh Shield
P Pink W White Gr Gray LL Light blue

wc_tx000853gb.fm 78

Wire Colors

G 25 Factory-Installed Options

4.12 Wiring Diagram Components—Factory-Installed Options

See Graphic: wc_gr001868

Ref Description Ref Description

1 Thermostat module 7 Positive air shutoff solenoid

actuator
2 Terminal block 8 Auxiliary relay terminals
3 1 Amp fuse 9 Plug 1, engine sensor inputs
4 Water level sensor 10 Electronic control board
5 Lube level maintainer low level

11 LCD heater

switch

6 30 Amp circuit breaker 12 Positive air shutoff relay module

wc_tx000853gb.fm 79

Technical Data G 25

5. Technical Data

5.1 Engine Power Rating

Engine Power Rating

Gross standby power rating per ISO 8528-1 and SAE J1995. Actual
power output may vary due to conditions of specific use.

5.2 Engine Data Table 1

G 25

0009368, 0009466,

0620004 Rev. 114 &

0620004 Rev. 115 &

lower

Engine

Engine make / type Isuzu
Model 4LE2-PV
Number of cylinders 4
Displacement

Engine speed
Rated standby power @

cm3 (in3)

rpm

kW(Hp)

2179 (133)

1800

23.9 (32.1)

1800 rpm
Coolant capacity
Oil capacity
Battery

l (qts.)

l (qts.)

Volts/CCa

12/650 12/1000

11.3 (11.9)

8.0 (8.5)

G 25

higher

Fuel type Diesel
Fuel tank capacity
Fuel consumption,

continuous load
Running time,

continuous load

wc_td000139gb.fm 80

l (gal.)

l/hr (gal./

hr)

Hours

227 (60)

6.8 (1.80)

33.3

G 25 Technical Data

5.3 Engine Data Table 2

G 25

0620344
0620346

G 25

0620345

Engine

Engine make / type Isuzu
Model 4LE2-NYGV, Tier 4
Number of cylinders 4
Displacement

Engine speed
Rated standby power

@ 1800 rpm
Coolant capacity
Oil capacity
Battery

cm3 (in3)

rpm

kW(Hp)

l (qts.)

l (qts.)

Volts/CCa

26.4 (35.4) 25.6 (34.3)

12/650 12/1000 12/650

2179 (133)

1800

11.3 (11.9)

8.0 (8.5)

Fuel type Diesel

G 25

0620706

Fuel tank capacity
Fuel consumption,

continuous load
Running time,

continuous load

l (gal.)

l/hr (gal./

hr)

Hours

227 (60) 512 (135.4)

6.8 (1.80)

33.3 75.2

wc_td000139gb.fm 81

Technical Data G 25

5.4 Generator Data

G 25

0009368 Rev.127 & higher

0009466 Rev.131 & higher
0009368 Rev.126 & lower
0009466 Rev.131 & lower
0620004 Rev.130 & lower

Generator

Make/Type Mecc Alte / Brushless
Model ECO 28-1L/4 ECO 28-2LN/4

0620004 Rev.130 & higher

0620344
0620345
0620346
0620706

Generator speed

rpm

1800
Voltage selector switch 3 position
AC voltages available 120/240 zig-zag

120/208 low-wye

277/480 Hi-wye
Frequency 60 Hz
Power factor

1ø
3ø

1.0

0.8
Voltage regulation ±1.00%
Insulation class H
Sound level at 7 m

(23 ft.)

dB(A)

65

AC receptacles 2 duplex, 2 twist-lock
1ø 120 GFI duplex
1ø 120/240 V twist lock

Amps

Amps

2-20

1-30 1-50
Standby Output
Continuous Output

wc_td000139gb.fm 82

kW/kVA

kW/kVA

20.4/25.5

19.5/24.4

G 25 Technical Data

5.5 Trailer and Skid Data

G 25

0009368

0009368

Rev.126 & lower

0009466

Rev.131 & lower

0620004

Rev.130 & lower

Trailer and Skid

Rev.127 & higher

0009466

Rev.131 & higher

0620004

Rev.130 & higher

0620344
0620345
0620346

0620706

Dry weight of skid
Operating weight

of skid
Trailer weight
GVWR
Surge brakes

Tires

kg (lbs.)

kg (lbs.)

kg (lbs.)

kg (lbs.)

Fluid

type

size

862 (1900) 867 (1911) 950 (2094)

1054 (2325) 1058 (2333) 1392 (3069)

182 (400) 442 (975)

1338 (2995) 2304 (5080)

DOT3

ST205/75D-15C

wc_td000139gb.fm 83

Technical Data G 25

5.6 Dimensions

mm (in.)

A

A

B

CG

G 25

0620344 0620346 0620345

D

F

E

G 25

0620706

Dimensions—mm (in.)

890 (35)

B

C

D

E

F

1130 (44.5) 1514 (59.6)

1260 (49.6) 1644 (64.9)

G

wc_td000139gb.fm 84

1620 (69)

1700 (67)

1945 (76.6)

3920 (154.5)

Wacker Neuson SE · Preußenstraße 41 · D-80809 München · Tel.: [phone] · Fax: +49 - (0)89-3 54 02-390
Wacker Neuson Corporation · P.O. Box 9007 · Menomonee Falls, WI 53052-9007 · Tel. : [phone] · Fax: [phone] · Tel. : [phone]
Wacker Neuson Limited - Room 1701–03 & 1717–20, 17/F. Tower 1, Grand Century Place, 193 Prince Edward Road West, Mongkok, Kowloon, Hongkong.
Tel: [phone], Fax: [phone]