DIESEL GENERATOR
MMG25IF4 • MMG35DF4
MMG45IF4 • MMG55DF4
TM
With Controller
01306
OPERATING MANUAL
Parts manuals available online at www.generacmobile.com
36949 B 02/16
WARNING
CALIFORNIA PROPOSITION 65 WARNING: Diesel engine exhaust and some of its
constituents are known to the state of California to cause cancer, birth defects, and
other reproductive harm. (000004)
WARNING
CALIFORNIA PROPOSITION 65 WARNING: This product contains or emits chemicals
known to the state of California to cause cancer, birth defects, and other reproductive
harm. (000005)
WARNING
ENVIRONMENTAL HAZARD: Always recycle batteries at an official recycling center in
accordance with all local laws and regulations. Failure to do so could result in
environmental damage, death or serious injury. (000228)
ii
Introduction
This manual provides information and procedures to safely operate and maintain the Generac Mobile Products unit.
For your own safety and protection from physical injury, carefully read, understand, and observe the safety instructions
described in this manual. Keep a copy of this manual with the unit at all times. Additional copies are available from
Generac Mobile Products, or can be found at www.generacmobile.com.The information contained in this manual
was based on machines in production at the time of publication. Generac Mobile Products reserves the right to
change any portion of this information without notice.
Read all of the manuals included with the unit. Each manual details specific information regarding items such as
setup, use and service requirements. An engine operator’s manual provides detailed operation and maintenance
procedures for the engine. Additional copies of the engine operator’s manual are available from the engine
manufacturer.
DO NOT MODIFY or use this equipment for any application other than for which it was designed.
Only a trained and licensed electrician should perform wiring and connections to unit. Wiring must be in compliance
with National Electrical Code (NEC), state and local regulations, as well as Occupational Safety and Health
Administration (OSHA) guidelines.
GENERAC MOBILE PRODUCTS LLC
215 Power Drive • Berlin, WI 54923
U.S.A.
Phone: 920-361-4442
FAX: 920-361-4416
Toll Free: 1-800-926-9768
www.generacmobile.com
For technical or parts QUESTIONS, please contact the Generac Mobile Products Customer Support
or Technical Support team at 1-800-926-9768. Please have your serial number available.
To ORDER SERVICE PARTS, please contact the dealer from which you purchased the unit, or call
Generac Mobile Products to locate a dealer in your area.
Engine Make:__________________________________________
Engine Serial Number:___________________________________
Engine Model Number: __________________________________
Generator Make: _______________________________________
Generator Model Number: ________________________________
Generator Serial Number: ________________________________
Unit Model Number:_____________________________________
Unit Serial Number: _____________________________________
iii
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iv
Table of Contents
Introduction............................................................................................................................ iii
Section 1 - Safety
Safety Notes ....................................................................................................................................... 1
Operating Safety................................................................................................................................. 1
Engine Safety ..................................................................................................................................... 2
Service Safety .................................................................................................................................... 2
Towing Safety..................................................................................................................................... 3
Reporting Trailer Safety Defects ........................................................................................................ 3
Safety Symbol Summary .................................................................................................................... 4
Section 2 - General Information
Specifications ..................................................................................................................................... 5
Unit Dimensions .................................................................................................................... 9
Unit Serial Number Locations ......................................................................................................... 10
Component Locations ...................................................................................................................... 11
Control Panel ................................................................................................................................... 12
Power Zone™ Gen Controller ......................................................................................................... 14
Controller Features and Functions ......................................................................................14
Operator Screens ................................................................................................................15
Maintenance Screens.......................................................................................................... 18
Generator Monitoring........................................................................................................... 21
Engine Monitoring................................................................................................................ 21
Controller Information Displays, Functions and Reset ........................................................ 21
Belt Tensioners................................................................................................................................. 22
Section 3 - Operation
Prestart Checklist ............................................................................................................................. 23
Manual Starting of the Unit ............................................................................................................... 23
Auto (Remote) Starting of the Unit ................................................................................................... 24
Derating for Altitude.......................................................................................................................... 25
Generator Output Connection Lugs.................................................................................................. 25
Fine Voltage Adjustment .................................................................................................................. 26
Voltage Selector Switch.................................................................................................................... 27
Voltage Regulation ........................................................................................................................... 28
Customer Convenience Receptacles ............................................................................................... 28
Main Circuit Breaker ......................................................................................................................... 29
Exhaust Filter Cleaning Operations.................................................................................................. 30
Disable Automatic (Auto) Exhaust Filter Cleaning............................................................... 30
Force a Manual Exhaust Filter Cleaning ............................................................................. 30
Enable Exhaust Filter Cleaning ...........................................................................................31
Transfer Switch................................................................................................................................. 31
Auto Exercise Timer ......................................................................................................................... 32
Accessing the Configuration Menu...................................................................................... 32
Set the Controller Clock....................................................................................................... 32
Set the Schedule ................................................................................................................. 33
Set the Unit to Auto Mode ................................................................................................... 33
Shutting Down the Unit..................................................................................................................... 33
Emergency Stop Switch ................................................................................................................... 34
Idle Switch (MMG25I-45I only) ......................................................................................................... 34
Towing the Unit................................................................................................................................. 34
Lifting the Unit................................................................................................................................... 35
v
Section 4 - Maintenance
Emissions Information ...................................................................................................................... 37
Daily Walk Around Inspection........................................................................................................... 37
General Maintenance ....................................................................................................................... 37
Basic Maintenance Schedule - Isuzu Engine ................................................................................... 39
Basic Maintenance Schedule - John Deere Engine ......................................................................... 40
Isuzu Engine Break-In Requirements............................................................................................... 41
John Deere Engine Break-In Requirements..................................................................................... 41
Resetting the Maintenance Alarms................................................................................................... 41
Checking Generator Drive Plate Torque .......................................................................................... 42
Jack Maintenance............................................................................................................................. 43
Side-Wind Models ............................................................................................................... 43
Top-Wind Models ................................................................................................................ 43
Trailer Wheel Bearings ..................................................................................................................... 43
Section 5 - Troubleshooting
Troubleshooting Automatic Shutdown Conditions............................................................................ 45
Low Fuel Level Shutdown ................................................................................................... 45
Low Oil Pressure Shutdown ................................................................................................45
Low Coolant Level Shutdown .............................................................................................. 45
High Coolant Temperature Shutdown .................................................................................45
Section 6 - Wiring Diagrams
AC Wiring - MMG25IF4, MMG45IF4 ................................................................................................ 47
AC Wiring - MMG35DF4, MMG55DF4 ............................................................................................. 48
AC Wiring - 4 Pos. Voltage Selector Switch Option - MMG25IF4, MMG45IF4 ................................ 49
AC Wiring - 4 Pos. Voltage Selector Switch Option - MMG35DF4, MMG55DF4 ............................. 50
AC Wiring Option - Standard Receptacles ...................................................................................... 51
AC Wiring Option - Engine Heater.................................................................................................... 51
AC Wiring Option - Buck Transformer ............................................................................................. 52
AC Wiring Option - PMG .................................................................................................................. 52
DC Wiring ......................................................................................................................................... 53
Trailer Lights Wiring ......................................................................................................................... 54
Wiring Harness - Electric Brake Option ........................................................................................... 55
DC Wiring Option - 12V Battery Charger..........................................................................................56
DC Wiring Option - Low Oil Level..................................................................................................... 56
Section 7 - Options & Accessories
Generator Cam Lock Connections Option........................................................................................ 57
Viscous Fan Clutch Option ............................................................................................................... 58
Service Log ............................................................................................................................ 59
vi
SAFETY NOTES
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.
This manual contains DANGERS, WARNINGS, CAUTIONS, NOTICES and NOTES which must be
followed to prevent the possibility of improper service, damage to the equipment, personal injury or death.
The following formatting options will apply when calling the readers attention to the DANGERS, WARNINGS, CAUTIONS, NOTICES and NOTES.
INDICATES A HAZARDOUS SITUATION WHICH, IF NOT AVOIDED, WILL RESULT IN
Indicates a hazardous situation which, if not avoided, could result in death or serious
Indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.
Section 1 - Safety
DANGER
DEATH OR SERIOUS INJURY.
WARNING
injury.
CAUTION
Indicates a hazardous situation which, if not avoided, could result in property or equipment
damage.
Note: Notes contain additional information important to a procedure and will be found within the regular text body
of this manual.
OPERATING SAFETY
Before using the unit, be sure you read and understand all of the instructions. This equipment was
designed for specific applications; DO NOT modify or use this equipment for any application other than
which it was designed for. 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 or set up the unit. The following points should be practiced at all times:
• The area immediately surrounding the unit should be dry, clean, and free of debris.
• Position and operate the unit on a firm, level surface.
• DO NOT start a unit in need of repair.
• If the unit is equipped with a frame grounding stud, follow any local, state, and National Electrical
Code (NEC) guidelines when connecting.
• DO NOT operate the unit on a combustible surface.
• DO NOT operate a unit while tired, distracted, or under the influence of drugs or alcohol.
• Keep all body parts, clothing and other loose items away from moving parts.
• DO NOT fill fuel tank near an open flame, while smoking, or while engine is running. DO NOT fill tank
in an enclosed area with poor ventilation.
• DO NOT operate with the fuel tank cap loose or missing.
• Shut the engine down if any of the following conditions exist during operation:
36949 B MMG25I-35D-45I-55DF4 Operating Manual 1
Safety
1. Noticeable change in engine speed.
2. Loss of electrical output.
3. Equipment connected to the unit overheats.
4. Sparking occurs.
5. Engine misfires or there is excessive engine/generator vibration.
6. Protective covers are loose or missing.
7. If the ambient air temperature is above 120°F (49°C).
ENGINE SAFETY
Internal combustion engines present special hazards during operation and fueling. Failure to follow the
safety guidelines described below could result in severe injury or death. Read and follow all safety warnings
described in the engine operator's manual. A copy of this manual was supplied with the unit when it was
shipped from the factory.
• DO NOT run engine indoors or in an area with poor ventilation unless exhaust hoses are used. Engine
exhaust contains carbon monoxide, a deadly, odorless and colorless gas which, if inhaled, can cause
nausea, fainting or death. Make sure engine exhaust cannot seep into closed rooms or ventilation
equipment.
• DO NOT touch or lean against hot exhaust pipes or engine components.
• DO NOT clean air filter with gasoline or other types of low flash point solvents.
• DO NOT operate the unit without a functional exhaust system.
• Prolonged exposure to sound levels in excess of 85 dB(A) can cause permanent hearing loss. Wear
hearing protection when working around a running engine.
• Batteries contain sulfuric acid which can cause severe injury or death. Sulfuric acid can cause eye
damage, burn flesh or eat holes in clothing. Protective eye wear and clothing are necessary when
working on or around the battery. Always disconnect the negative (-) battery cable from the
corresponding terminal before performing any service on the engine or other components.
• DO NOT open the radiator cap or oil drain plug while the engine is running or before the engine has
cooled down. Pressurized coolant and hot engine oil can cause severe burns. Allow the unit to cool
completely before attempting any service work.
• Keep area around exhaust pipes and air ducts free of debris to reduce the chance of an accidental fire.
SERVICE SAFETY
All service work must be performed by qualified personnel who are familiar with the equipment. Only a
qualified electrician should troubleshoot or repair electrical problems occurring in this equipment. Follow the safety guidelines described below to prevent hazardous situations which could result in severe
injury or death.
• NEVER wash the unit with high pressure hoses, power washers, or steam cleaners. Water may collect
in the unit, causing damage to electrical parts.
• ALWAYS use extreme caution when servicing this unit in damp conditions. Do not service the unit if
your skin or clothing is wet. Do not allow water to collect around the base of the unit.
• Replace all missing and hard to read decals. Decals provide important operating instructions and
warn of dangers and hazards.
• Before servicing the unit, verify the Control Power switch and circuit breakers are in the OFF (O)
position, and the negative (-) terminal on the battery is disconnected. DO NOT perform even routine
service (oil/filter changes, cleaning, etc.) unless all electrical components are shut down.
2 MMG25I-35D-45I-55DF4 Operating Manual 36949 B
• DO NOT start the unit under load. The circuit breakers must be in the OFF (O) position when starting
the unit in Manual mode. The circuit breakers can be in the ON (I) position only when started in the
Auto mode. A transfer switch must be used in the Auto mode to deflect the load upon startup.
TOWING SAFETY
Towing a trailer requires care. Both the trailer and vehicle must be in good condition and securely fastened
to each other to reduce the possibility of an accident. Some states require that large trailers be registered
and licensed. Contact your local Department of Transportation office to check on license requirements for
your particular unit.
• Verify the hitch and coupling on the towing vehicle are rated equal to, or greater than, the trailer's
Gross Vehicle Weight Rating (GVWR).
• Check trailer tires for wear and proper inflation.
• DO NOT tow trailer using defective parts. Inspect the hitch and coupling for wear or damage.
• Verify the trailer hitch and the coupling are compatible. Make sure the coupling is securely fastened
to the vehicle.
• Verify directional and brake lights on the trailer are connected and working properly.
• Verify wheel lug nuts are present and tightened to the specified torque.
• Maximum recommended speed for highway towing is 45 mph (72 km/h). Recommended off-road
towing speed is 10 mph (16 km/h) or less, depending on terrain.
Safety
• When towing, maintain extra space between vehicles and avoid soft shoulders, curbs and sudden
lane changes. Practice turning, stopping and backing up in an area away from heavy traffic prior to
transporting the unit.
• Wipe the coupler clean and apply fresh grease each time the trailer is towed to eliminate squeaking.
• Connect safety chains in a crossing pattern under the tongue and ATTACH THE BREAKAWAY
CABLE TO THE REAR BUMPER OF THE TOWING VEHICLE. Do not attach the cable to the trailer
hitch.
• Before towing the trailer, verify that the weight of the trailer is equal across all tires. On trailers with
adjustable height hitches, adjust the angle of the trailer tongue to keep the trailer as level as possible.
On units equipped with a tandem axle trailer, a large angle between the trailer and tow vehicle will
cause more weight to be carried by one axle, which could cause premature wear on the tires and
axles and cause potentially unsafe operating conditions.
• The trailer is equipped with hydraulic or electric surge brakes. Verify proper operation of the brakes
by braking the vehicle at a slow speed before entering traffic. Both the trailer and the vehicle should
brake smoothly. If the trailer seems to be pushing, verify the level in the brake fluid reservoir, if equipped.
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 Generac Mobile Products.
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 an individual
problem between you, your dealer, or Generac Mobile Products.
To contact NHTSA, you may either call the Auto Safety Hotline toll-free at 1-888-327-4236 (TTY:1-800-424-9153),
go to http://www.safercar.gov; or write to:
Administrator
NHTSA
1200 New Jersey Avenue S.E.
Washington, DC 20590
36949 B MMG25I-35D-45I-55DF4 Operating Manual 3
Safety
You can also obtain other information about motor vehicle safety from http://www.safercar.gov.
SAFETY SYMBOL SUMMARY
This equipment has been supplied with numerous safety and operating decals. These decals provide important
operating instructions and warn of dangers and hazards. Replace any missing or hard-to-read decals and use care
when washing or cleaning the unit. Decal placement and part numbers can be found in the online parts manual at
www.generacmobile.com. Below is a summary of the intended meanings for the symbols used on the decals.
STOP
Safety alert symbol;
used to alert you
to potential hazards.
Hot surface(s) nearby.
Dangerous voltage may
be present.
Check diesel fuel fill
level.
Read and understand
the operator’s manual
before operating.
Stop engine.
Asphyxiation hazard;
operate in well ventilated area.
Burn/scald hazard;
pressurized steam.
Anchor/tie down point.
Disconnect battery
before servicing.
Unit electrical ground.
Isolate generator to
prevent electrocution
hazard.
Belt/entanglement
hazard; keep body parts
clear of this area.
208
120
480
277
Never change phase
240
120
switch position while
engine is running.
Do not remove guard.
Fire/explosion hazard;
keep open flames
away from unit.
Lift here only.
Never change switch
position while engine is
running.
Battery is
disconnected.
Engine running.
Automatic Start.
Force Exhaust
Regeneration.
Fan hazard; keep body
parts clear of this area.
01879
Figure 1-1. Decal Safety Symbol Summary
4 MMG25I-35D-45I-55DF4 Operating Manual 36949 B
Section 2 - General Information
SPECIFICATIONS
GENERAC MODEL MMG25IF4
Engine
Make/Brand........................................................................................................................... Isuzu
Model .................................................................................................................................... 4LE2TAGV-03
EPA Tier ................................................................................................................................ F4
Horsepower - prime hp (kW) ............................................................................................... 36.2 (27.0)
Horsepower - standby hp (kW) ............................................................................................ 40.2 (30.0)
Operating Speed rpm .......................................................................................................... 1800
Displacement in
Cylinders - qty ....................................................................................................................... 4
Fuel Consumption - 100% prime gph (Lph) ........................................................................ 2.1 (7.8)
Battery Type.......................................................................................................................... 24
Battery Voltage (Quantity per Unit) ....................................................................................... 12V (1)
Battery Rating ....................................................................................................................... 720 CCA
Generator
Make/Brand........................................................................................................................... Marathon Electric
Model .................................................................................................................................... 283PSL1707
Type, Insulation..................................................................................................................... Brushless, H
Generator Set (Engine/Generator)
3Ø - Standby kW (kVA) ....................................................................................................... 26 (32)
Amps - 3Ø Standby 480V (208V) A ..................................................................................... 38 (89)
3Ø - Prime kW (kVA) ........................................................................................................... 23 (29)
Amps - 3Ø Prime 480V (208V) A ......................................................................................... 35 (80)
1Ø - Standby kW (kVA) ....................................................................................................... 24 (24)
Amps - 1Ø Standby - 240V A .............................................................................................. 100
1Ø - Prime kW (kVA) ........................................................................................................... 22 (22)
Amps - 1Ø Prime - 240V A .................................................................................................. 92
Frequency Hz ....................................................................................................................... 60
Power Factor......................................................................................................................... 1 (1Ø), 0.8 (3Ø)
Sound dB(A) 23 ft @ prime ................................................................................................. 66
3
(L) ............................................................................................................. 133 (2.18)
Weights
Dry Weight, Skid Mounted lbs (kg) ...................................................................................... 2430 (1102)
Operating Weight, Skid Mounted lbs (kg) ........................................................................... 3160 (1433)
Dry Weight, Trailer Mounted* lbs (kg) ................................................................................. 2950 (1338)
Operating Weight, Trailer Mounted* lbs (kg) ....................................................................... 3680 (1669)
*Standard trailer only. Consult factory for custom trailer weights.
Capacities
Fuel Tank Volume gal (L) ..................................................................................................... 100 (379)
Usable Fuel Volume gal (L) ................................................................................................. 90 (341)
Coolant (incl. engine) qt (L) ................................................................................................. 18 (17)
Oil (incl. filter) qt (L) ............................................................................................................. 11 (10.4)
Maximum Run Time hrs ...................................................................................................... 42.9
AC Distribution
Circuit Breaker Size .............................................................................................................. 125
Voltage Selection .................................................................................................................. 3 position switch (lockable)
Voltage Regulation................................................................................................................ +/- 0.5%
Voltages Available 1Ø ...........................................................................................................120, 139, 208, 220, 240, 277
Voltages Available 3Ø ...........................................................................................................208, 220, 440, 480
Trailer
Number of Axles.................................................................................................................... 1
Capacity - Axle Rating lbs (kg) ............................................................................................ 5000 (2268)
Tire Size
Brakes................................................................................................................................... Surge
Hitch - Standard .................................................................................................................... 2'' ball
Maximum Tire Pressure psi ................................................................................................. 65
in ........................................................................................................................... 15
Specifications are subject to change without notice.
36949 B MMG25I-35D-45I-55DF4 Operating Manual 5
General Information
GENERAC MODEL MMG35DF4
Engine
Make/Brand........................................................................................................................... John Deere
Model .................................................................................................................................... 3029HFG03
EPA Tier ................................................................................................................................ F4
Horsepower - prime hp (kW) ............................................................................................... 44 (33)
Horsepower - standby hp (kW) ............................................................................................ 48 (36)
Operating Speed rpm .......................................................................................................... 1800
Displacement in
Cylinders - qty ....................................................................................................................... 3
Fuel Consumption - 100% prime gph (Lph) ........................................................................ 2.9 (11.0)
Battery Type.......................................................................................................................... 24
Battery Voltage (Quantity per Unit) ....................................................................................... 12V (1)
Battery Rating ....................................................................................................................... 720 CCA
Generator
Make/Brand........................................................................................................................... Marathon Electric
Model .................................................................................................................................... 284CSL1542
Type, Insulation..................................................................................................................... Brushless, H
Generator Set (Engine/Generator)
3Ø - Standby kW (kVA) ....................................................................................................... 31 (39)
Amps - 3Ø Standby 480V (208V) A ..................................................................................... 47 (108)
3Ø - Prime kW (kVA) ........................................................................................................... 29 (36)
Amps - 3Ø Prime 480V (208V) A ......................................................................................... 43 (100)
1Ø - Standby kW (kVA) ....................................................................................................... 30 (30)
Amps - 1Ø Standby - 240V A .............................................................................................. 125
1Ø - Prime kW (kVA) ........................................................................................................... 27 (27)
Amps - 1Ø Prime - 240V A .................................................................................................. 113
Frequency Hz ....................................................................................................................... 60
Power Factor......................................................................................................................... 1 (1Ø), 0.8 (3Ø)
Sound dB(A) 23 ft @ prime ................................................................................................. 68
3
(L) ............................................................................................................. 177 (2.9)
Weights
Dry Weight, Skid Mounted lbs (kg) ...................................................................................... 3125 (1418)
Operating Weight, Skid Mounted lbs (kg) ........................................................................... 3860 (1751)
Dry Weight, Trailer Mounted* lbs (kg) ................................................................................. 3725 (1690)
Operating Weight, Trailer Mounted* lbs (kg) ....................................................................... 4460 (2023)
*Standard trailer only. Consult factory for custom trailer weights.
Capacities
Fuel Tank Volume gal (L) ..................................................................................................... 100 (379)
Usable Fuel Volume gal (L) ................................................................................................. 90 (341)
Coolant (incl. engine) qt (L) ................................................................................................. 18 (17)
Oil (incl. filter) qt (L) ............................................................................................................. 11 (10.4)
Maximum Run Time hrs ...................................................................................................... 31
AC Distribution
Circuit Breaker Size .............................................................................................................. 125
Voltage Selection .................................................................................................................. 3 position switch (lockable)
Voltage Regulation................................................................................................................ +/- 1%
Voltages Available 1Ø ...........................................................................................................120, 139, 208, 220, 240, 277
Voltages Available 3Ø ...........................................................................................................208, 220, 440, 480
Trailer
Number of Axles.................................................................................................................... 1
Capacity - Axle Rating lbs (kg) ............................................................................................ 6000 (2722)
Tire Size
in ........................................................................................................................... 15
Brakes................................................................................................................................... Surge
Hitch - Standard .................................................................................................................... 2'' ball
Maximum Tire Pressure psi ................................................................................................. 65
Specifications are subject to change without notice.
6 MMG25I-35D-45I-55DF4 Operating Manual 36949 B
General Information
GENERAC MODEL MMG45IF4
Engine
Make/Brand........................................................................................................................... Isuzu
Model .................................................................................................................................... 4LE2XAGV01
EPA Tier ................................................................................................................................ F4
Horsepower - prime hp (kW) ............................................................................................... 57 (42.8)
Horsepower - standby hp (kW) ............................................................................................ 63.7 (47.5)
Operating Speed rpm .......................................................................................................... 1800
Displacement in
Cylinders - qty ....................................................................................................................... 4
Fuel Consumption - 100% prime gph (Lph) ........................................................................ 3.3 (12.5)
Battery Type.......................................................................................................................... 35/55
Battery Voltage (Quantity per Unit) ....................................................................................... 12V (1)
Battery Rating ....................................................................................................................... 720 CCA
Generator
Make/Brand........................................................................................................................... Marathon Electric
Model .................................................................................................................................... 285PSL1700
Type, Insulation..................................................................................................................... Brushless, H
Generator Set (Engine/Generator)
3Ø - Standby kW (kVA) ....................................................................................................... 44 (55)
Amps - 3Ø Standby 480V (208V) A ..................................................................................... 66 (153)
3Ø - Prime kW (kVA) ........................................................................................................... 38 (47)
Amps - 3Ø Prime 480V (208V) A ......................................................................................... 57 (130)
1Ø - Standby kW (kVA) ....................................................................................................... 40 (40)
Amps - 1Ø Standby - 240V A .............................................................................................. 167
1Ø - Prime kW (kVA) ........................................................................................................... 33 (33)
Amps - 1Ø Prime - 240V A .................................................................................................. 138
Frequency Hz ....................................................................................................................... 60
Power Factor......................................................................................................................... 1 (1Ø), 0.8 (3Ø)
Sound dB(A) 23 ft @ prime ................................................................................................. 66
3
(L) ............................................................................................................ 134 (2.2)
Weights
Dry Weight, Skid Mounted lbs (kg) ...................................................................................... 2843 (1290)
Operating Weight, Skid Mounted lbs (kg) ........................................................................... 3580 (1624)
Dry Weight, Trailer Mounted* lbs (kg) ................................................................................. 3363 (1525)
Operating Weight, Trailer Mounted* lbs (kg) ....................................................................... 4100 (1860)
*Standard trailer only. Consult factory for custom trailer weights.
Capacities
Fuel Tank Volume gal (L) ..................................................................................................... 100 (379)
Usable Fuel Volume gal (L) ................................................................................................. 90 (341)
Coolant (incl. engine) qt (L) ................................................................................................. 18 (17)
Oil (incl. filter) qt (L) ............................................................................................................. 12 (11.4)
Maximum Run Time hrs ...................................................................................................... 27
AC Distribution
Circuit Breaker Size .............................................................................................................. 225
Voltage Selection .................................................................................................................. 3 position switch (lockable)
Voltage Regulation................................................................................................................ +/- 0.5%
Voltages Available 1Ø ...........................................................................................................120, 139, 208, 220, 240, 277
Voltages Available 3Ø ...........................................................................................................208, 220, 440, 480
Trailer
Number of Axles.................................................................................................................... 1
Capacity - Axle Rating lbs (kg) ............................................................................................ 5000 (2268)
Tire Size
in ........................................................................................................................... 15
Brakes................................................................................................................................... Surge
Hitch - Standard .................................................................................................................... 2'' ball
Maximum Tire Pressure psi ................................................................................................. 65
Specifications are subject to change without notice.
36949 B MMG25I-35D-45I-55DF4 Operating Manual 7
General Information
GENERAC MODEL MMG55DF4
Engine
Make/Brand........................................................................................................................... John Deere
Model .................................................................................................................................... 3029HFG03
EPA Tier ................................................................................................................................ F4
Horsepower - prime hp (kW) ............................................................................................... 67 (50)
Horsepower - standby hp (kW) ............................................................................................ 74 (55)
Operating Speed rpm .......................................................................................................... 1800
Displacement in
Cylinders - qty ....................................................................................................................... 3
Fuel Consumption - 100% prime gph (Lph) ........................................................................ 3.9 (14.8)
Battery Type.......................................................................................................................... 24
Battery Voltage (Quantity per Unit) ....................................................................................... 12V (1)
Battery Rating ....................................................................................................................... 720 CCA
Generator
Make/Brand........................................................................................................................... Marathon Electric
Model .................................................................................................................................... 286PSL1701
Type, Insulation..................................................................................................................... Brushless, H
Generator Set (Engine/Generator)
3Ø - Standby kW (kVA) ....................................................................................................... 48 (60)
Amps - 3Ø Standby 480V (208V) A ..................................................................................... 72 (167)
3Ø - Prime kW (kVA) ........................................................................................................... 44 (55)
Amps - 3Ø Prime 480V (208V) A ......................................................................................... 66 (153)
1Ø - Standby kW (kVA) ....................................................................................................... 46 (46)
Amps - 1Ø Standby - 240V A .............................................................................................. 192
1Ø - Prime kW (kVA) ........................................................................................................... 42 (42)
Amps - 1Ø Prime - 240V A .................................................................................................. 175
Frequency Hz ....................................................................................................................... 60
Power Factor......................................................................................................................... 1 (1Ø), 0.8 (3Ø)
Sound dB(A) 23 ft @ prime ................................................................................................. 68
3
(L) ............................................................................................................ 177 (2.9)
Weights
Dry Weight, Skid Mounted lbs (kg) ...................................................................................... 3305 (1499)
Operating Weight, Skid Mounted lbs (kg) ........................................................................... 4040 (1833)
Dry Weight, Trailer Mounted* lbs (kg) ................................................................................. 3905 (1771)
Operating Weight, Trailer Mounted* lbs (kg) ....................................................................... 4640 (2105)
*Standard trailer only. Consult factory for custom trailer weights.
Capacities
Fuel Tank Volume gal (L) ..................................................................................................... 100 (379)
Usable Fuel Volume gal (L) ................................................................................................. 90 (341)
Coolant (incl. engine) qt (L) ................................................................................................. 18 (17)
Oil (incl. filter) qt (L) ............................................................................................................. 11 (10.4)
Maximum Run Time hrs ...................................................................................................... 23
AC Distribution
Circuit Breaker Size .............................................................................................................. 225
Voltage Selection .................................................................................................................. 3 position switch (lockable)
Voltage Regulation................................................................................................................ +/- 1%
Voltages Available 1Ø ...........................................................................................................120, 139, 208, 220, 240, 277
Voltages Available 3Ø ...........................................................................................................208, 220, 440, 480
Trailer
Number of Axles.................................................................................................................... 1
Capacity - Axle Rating lbs (kg) ............................................................................................ 6000 (2722)
Tire Size
in ........................................................................................................................... 15
Brakes................................................................................................................................... Surge
Hitch - Standard .................................................................................................................... 2'' ball
Maximum Tire Pressure psi ................................................................................................. 65
Specifications are subject to change without notice.
8 MMG25I-35D-45I-55DF4 Operating Manual 36949 B
Unit Dimensions
General Information
C
BA
A B
Figure 2-1. Unit Dimensions
A (Width) B (Length) C (Height)
MMG25IF4/35DF4/45IF4/55DF4 Skid Mounted
MMG25IF4/35DF4/45IF4/55DF4 Trailer Mounted
Specifications are subject to change without notice.
39 in. (.99 m) 95 in. (2.41 m) 65 in. (1.65 m)
58 in. (1.45 m) 152 in. (3.81 m) 83 in. (2.11 m)
C
01906
36949 B MMG25I-35D-45I-55DF4 Operating Manual 9
General Information
UNIT SERIAL NUMBER LOCATIONS
See Figure 2-2 for unit ID tag and Vehicle Identification Number (VIN) tag on the unit. Important information, such
as the unit serial number, model number, VIN and tire loading information are found on these tags. Record the
information from these tags so it is available if the tags are lost or damaged. When ordering parts or requesting
assistance, you may be asked to provide this information.
UNIT ID Tag
Manufactured by Generac Mobile Products, LLC.,
a subsidiary of Generac Power Systems, Inc.
(920) 361-4442 (800) 926-9768
Country of Origin
Manufacturing Code
1 ph. 1.0PF 3 ph. .8PF 3 ph. 1.0PF
KW
KVA
V
A
Located behind breaker
door underneath breakers
Serial Number
Model
Weight (lbs/kg) RPM/Frequency
Rating
FOR ELECTRICAL EQUIPMENT
ONLY. POUR MATERIAL
ELECTRIQUE SEULEMENT.
209649
Form: SFC626B
Ins. Class
VIN Tag
MANUFACTURED BY/FABRIQUE PAR: Products LLC DATE: 00/0000
GVWR/PNBV: 000KG (0000LBS) COLD INF. PRESS./
PRESS. DE
GAWR / PNBE TIRE / PNEU RIM / JANTE GONF A FROID - KPA(PSI/LPC) SGL / DUAL
EACH
AXLE
THIS VEHICLE CONFORMS TO ALL APPLICABLE STANDARDS PRESCRIBED UNDER THE U.S. FEDERAL MOTOR VEHICLE SAFETY STANDARDS(FMVSS) AND CANADIAN
MOTOR VEHICLE SAFETY REGULATIONS IN EFFECT ON THE DATE OF MANUFACTURE.
CE VEHICULE EST CONFORME A TOUTES LES NORMES QUI LUI SONT APPLICABLES EN VERTU DU REGLEMENT SUR LA SECURITE DES VEHICULES AUTOMOBILES DU CANADA EN VIGUEUR A LA DATE SA
FABRICATION.
00000000000000000
V.I. N. /N. I. V.:
Located on opposite side of trailer
Generac Mobile
XXX000
MODEL:
TYPE:
TRAILER
TIRE AND LOADING INFORMATION
RENSEIGNEMENTS SUR LES
PNEUS ET LE CHARGEMENT
The weight of cargo should never exceed 0000KG (0000LBS)
Le poids du chargement ne doit jamais depasser 0000KG (0000LBS)
SEE OWNER’S
MANUAL FOR
ADDITIONAL
INFORMATION
VOIR LE
MANUEL DE
L’USAGER
POUR
PLUS DE
RENSEIGNEMENTS
01028
Figure 2-2. Serial Number Locations
10 MMG25I-35D-45I-55DF4 Operating Manual 36949 B
COMPONENT LOCATIONS
2
General Information
3
12
1
6
13
4
5
7
11
10
9
Figure 2-3. Component Locations
1. Engine exhaust 8. Lug box panel access
2. Radiator access panel 9. Containment drain/fuel drain port
3. Central lift point 10. Receptacle panel
4. Fuel fill 11. Emergency stop
5. Engine and battery access 12. Control access panel
6. Radiator drain port 13. Breaker panel access
7. Engine access
36949 B MMG25I-35D-45I-55DF4 Operating Manual 11
8
01880
General Information
CONTROL PANEL
6
5
4
1
2
Figure 2-4. Control Panel (Rear of Unit)
1. Voltage selector switch 4. Engine idle switch
2. 50/60 Hz switch (optional) 5. Control power switch
3. Fuel transfer pump switch (optional) 6. Power Zone™ controller
3
01881
12 MMG25I-35D-45I-55DF4 Operating Manual 36949 B
General Information
14
13
15
1
2
3
4
5
6
7
2
12
11
10
Figure 2-5. Control Panel (Right Side of Unit)
1. Main circuit breaker 9. Connection lugs (4)
2. Control panel lights (3) 10. Cam lock connection lugs (5) (optional)
3. 50A circuit breakers (3) 11. Connection for optional equipment inlet
4. Service lights switch 12. 120V/240V twist-lock receptacles (3)
5. 20A circuit breakers (2) 13. Connection for battery charger
6. Lug door safety switch 14. 120V GFCI receptacles (2)
7. Remote start terminal block 15. Emergency stop switch
8. Ground connection lug
8
9
01882
36949 B MMG25I-35D-45I-55DF4 Operating Manual 13
General Information
POWER ZONE™ GEN CONTROLLER
The Power Zone™ Gen controller is an auto start controller that monitors the unit and indicates operational status
and fault conditions. The controller can be programmed to automatically start or stop based on time schedule, fault
condition, or load demand.
The controller constantly monitors vital generator and engine functions for a number of preprogrammed alarm and
fault conditions. When a fault condition occurs, the engine can be shut down automatically and the LCD window will
show the fault that caused the shut down; to resume operation, the fault condition must be resolved.
This controller also records a history of unit performance which may be viewed at any time and will not be lost when
the controller is powered down.
1
11
10
9
8
7
6
5
Figure 2-6. Power Zone™ Gen Controller Layout
1. LCD window 7. Alarm mute button
2. Navigation buttons 8. Voltage screen button
3. Engine start (manual mode) button 9. Generator screen button
4. Engine stop/reset button 10. Engine screen button
5. Control power switch 11. Home screen button
6.
Auto/manual mode button
2
3
4
01907
Controller Features and Functions
Operator Screens
These buttons are used to enter the various operator screens from any other screen. The operator screens consists
of four screens: Home ( ), Engine ( ), Generator ( ), and Voltage Adjust ( ). For information about the
GEN
screens, refer to Operator Screens.
Alarm Mute
The Alarm Mute ( ) button silences the audible alarm. Additional action will be required to fully disable the active
alarm.
14 MMG25I-35D-45I-55DF4 Operating Manual 36949 B
V
-
+
General Information
Auto/Manual Mode
The Auto/Manual Mode ( ) button is used to change the startup and shutdown modes of the unit. When pressed
once, the unit enters Manual mode and when pressed and held for five seconds, the unit enters Auto mode. If in
Auto mode, pressing once will return the unit to Manual mode.
Navigation Buttons
These buttons are used to navigate and interact with the Power Zone™ controller screens. Pressing any directional
arrow (▲, ►, ▼, ◄) while on any of the operator screens will open the maintenance screens, and navigate the tabs
and pages within the maintenance screens. The Enter () button is used to select menus, confirm alarms, and
confirm altered settings.
Control Power Switch
Use this switch to start up and shut down the Power Zone™ controller. This switch should not be turned off when
the unit is running.
Engine Start
Pressing the Engine Start (I) button while the controller is in Manual mode will start the unit, provided there are no
shutdown errors, and the engine satisfies the start status. If the controller is in Auto mode, the Engine Start (I) button
has no effect.
Engine Stop/Reset
Pressing the Engine Stop/Reset (O) button will shut down the unit and put the controller into Stop mode, whether in
Manual mode or Auto mode.
CAUTION
In case of an emergency, press the emergency stop switch, located on the side of the unit,
to stop the engine immediately. The Engine Stop/Reset (O) button may delay the engine
shutdown if stop faults exist.
To prevent damage to the generator and connected equipment, remove all loads from the
generator by opening all circuit breakers (turn OFF (O)) before pressing the Engine Stop/
Reset (O) button.
The Liquid Crystal Display (LCD)
This window will display the various operator and maintenance screens. By viewing these screens, the operator will
be able to monitor both the engine and generator status while the unit is running.
Operator Screens
The operator screens display the most relevant and critical information an operator will need to properly configure
and utilize a unit. From these four screens, the operator can access engine, generator and power transmission
information necessary to operate the unit under normal conditions.
Home Screen
The Home screen is the default screen of the controller and will display after the controller is powered up and the
unit management software is loaded. It displays a live readout of the kW meter, percent of load used (gauge), selected
phase, volts and amps being produced by the generator, and the fuel level with time until empty. The controller will
automatically return to this screen from any other screen after a period of inactivity.
36949 B MMG25I-35D-45I-55DF4 Operating Manual 15
General Information
Manual Mode
Time to Empty
15 hr
110
100
106.9 kW
GEN
V
-
+
60
50
40
30
20
10
0
90
80
70
%
3 PHASE
Volts
480
Amps
128
Figure 2-7. Home Screen
Engine Screen
The Engine screen displays the oil pressure, coolant temperature and battery voltage on three main gauges. Below
the gauges is an hour gauge displaying the total run time on the engine. At the bottom of the screen are maintenance
alarm statuses with the time remaining (black text) or the time past (red text) a scheduled maintenance task, along
with the description of the maintenance procedure and the action that will take place when the timer trips the alarm.
Full
3/4
1/2
1/4
Empty
74
%
00393
Manual Mode
40 60
20
0
GEN
Oil press. Coolant Temp. Battery
V
-
+
Maintenance
Alarm Hours Description Action
1 174 To Service Oil Maintenance
2 174 To Service Fuel Maintenance
3 174 To Service Air Maintenance
80
100
190 210
170
230
250
°F214PSI50.9
0 0 3 2 5 1 5
Hrs
20 30
10
0
13.8 V
40
50150
Warning
Shutdown
Electrical Trip
00394
Figure 2-8. Engine Screen
Note: If the measured value is outside the range of a gauge, the needle will not be displayed. The digital value below
the gauge will still show the measured value.
• Oil Press: Displays engine oil pressure. Current coolant temperature is displayed directly below the gauge
at all times. The gauge registers oil pressure between 0-100 psi (0-689 kPa). Normal operating pressure is
between 35-80 psi (241-552 kPa).
• Coolant Temp: Displays engine coolant temperature. Current coolant temperature is displayed directly
below the gauge at all times. The gauge displays coolant temperature between 150°-250°F (66°-121°C).
Normal operating temperature of the unit is between 180°-200°F (82°-93°C) with an average ambient air
temperature of 70°F (21°C).
• Battery: Displays the engine battery voltage. Current battery voltage is displayed directly below the gauge
at all times. The gauge displays battery voltage between 0-50V. A normal reading is 12-14V on 12 volt
systems and 24-26V on 24 volt systems (with the engine running).
16 MMG25I-35D-45I-55DF4 Operating Manual 36949 B
General Information
V
V
Generator Screen
The Generator screen displays the average voltage frequency, volts and amps from the generator, as well as lineto-line voltage, and individual line-to-neutral voltage, amperage and power (kW). This screen also displays the
generator winding configuration set by the voltage selector switch in the lower right corner.
Manual Mode
GEN
V
-
+
30 40
20
10
0
Volt Volt Amp kW
L1-L2 L1
L2-L3 L2
L3-L1 L3
Freq
0
0
0
50
70 0
IE
60
0
0
0
175
88
0
25
50
0
263
350 0
Parallel Low Zig-Zag
0.0
0.0
0.0
25
13
L1 (U)
38
50
AmpVolt
N
L2 (W)
00395
Figure 2-9. Generator Screen
Note: When loading the generator, it is important to observe the amperage to determine the load balance on each
line of the generator. Minor load unbalances, usually ten percent or less, will not cause problems. Every effort should
be made to distribute the load equally between all lines.
• Freq: Displays the output frequency in Hertz (Hz). Normal operating frequency is 60 Hz.
• Volts: Displays the nominal voltage in Volts (V).
• Amps: Displays the AC output amperage produced by the generator in Amps (A).
Additional information can be found on the electric power table at the bottom-left side of the screen. This provides
an overview of all three lines and average voltage and amperage readouts.
Voltage Adjust Screen
The Voltage Adjust screen displays the line-to-neutral and line-to-line voltage averages. The operator can electronically adjust the voltage within limits to prevent under-voltage or over-voltage conditions using the on-screen
instructions. This feature replaces a traditional potentiometer. Refer to Shutting Down the Unit for more information.
Manual Mode
Voltage Adjust
- Press , voltage will begin flashing
- Use and arrows to adjust voltage
- Press to confirm new voltage. Numbers will stop flashing
GEN
V
-
+
480
277
L-N Average
L-L Average
00396
Figure 2-10. Voltage Adjust Screen
36949 B MMG25I-35D-45I-55DF4 Operating Manual 17
General Information
Maintenance Screens
All of the data inputs from the engine, generator, inputs/outputs, schedule and Power Zone™ controller are visible
on the maintenance screens.
The information displayed on the maintenance screens can be used to identify, diagnose and troubleshoot unit
shutdown conditions and poor unit performance. The maintenance screens can be accessed from any Operator
screen by pressing any directional arrow (▲, ►, ▼, ◄).
The bottom of the screens have a list of available tabs, with the currently displayed tab highlighted in blue. The tabs
can be selected by using the ▲ or ▼ buttons. To the left of the tabs, the current/available pages are displayed. The
pages within a tab can be viewed by using the ▲ and ▼ buttons. Whenever a new tab is selected, the current page
will always be page 1.
Generator Summary
The Generator Summary can be found at the top of all maintenance screens and provides an overview of the system.
SITE GENSET
Return Delay 10:00:00
kW
kVAr
Figure 2-11. Generator Summary Screen
0.0
Hz
480V/277V 3-Phase
%
0.0
%
0.0
To ta l
0.0
0.0
0.0
0.00
Energy Generator
kW
kVA
kVAr
0.0
0.0
0.0
07:10
kWh+
kVAh
kVArhpf
01781
Engine Tab
The Engine tab contains maintenance and instrumentation data gathered from the engine itself. Above the engine
analog meters is a row of alarm icons. Each icon can be one of three colors: grey (inactive), yellow (warning) or red
(shutdown). The alarm icons are as follows from left to right: water in fuel, emission filter, engine air inlet temperature,
charge alternator, oil pressure, fuel level, battery voltage, coolant temperature, and ECU lamp.
Note: The content may change depending upon the selected engine and the features supported by the engine.
SITE GENSET 7741 \ 7740
Return Delay 10:00:00
0.0 Hz
kW
12 15
15
18
GEN
V
-
+
9
6
3
0
0
00000 00
Engine Starts
Fuel Used
Fuel Remaining
1/9
RPM
Hrs
36
US Gal
Litre
kVAr
5
21
33
46
3
2
24
1
27
0
30
Oil press. Coolant Temp.
50 150
0
-50
7
100
0 °F V
8
9
10 -50
200
250
0.0
0.0
0
10
0
480V/277V 3-Phase
Total Generator
kW
0.0
0.0
kVA
kVAr
0.0
%
0.00
pf
%
100
50 150
200
250 0
0 °FPSI
20 30
40
50
0.0 V0.0
07:10
kWh+
0.0
0.0
kVAh
kVArh
0.0
CAN
50
40 60
30
70
20
10
10
0
00.00
Fuel Level
20 30
Charge AltBatteryOil Temp
80
90
100
%
40
50
StatusScheduleI/OAlarmsEngine Generator
00398
Figure 2-12. Engine Tab Screen
Generator Tab
The Generator tab contains maintenance and instrumentation data gathered from the generator. Each page highlights
different data gathered by the generator with the analog meters changing accordingly. The last two pages will display
the information in the bar graph. The bar graph shows blue for positive and red for negative. For the power factor
bar graph, blue is for lagging pf and red is for leading pf.
Note: The content may change, depending upon the selected generator and the features supported by the generator.
18 MMG25I-35D-45I-55DF4 Operating Manual 36949 B
General Information
SITE GENSET 7741 \ 7740
Return Delay 10:00:00
0.0 Hz
kW
kVAr
300
400
GEN
V
+
200
100
0
-
L1-L2
L2-L3
L3-L1
1/9
500
600
L1-L2 L2-L3 L3-L1 Hz
Volt Volt Amp kW kVA kVAr pf
L1
0
L2
0
L3
0
IE
300
400
200
100
0
0
0
00
500
600 0
0
0
0
100
200
0.0
0.0
0.0
480V/277V 3-Phase
%
0.0
%
0.0
300
400
500
600 0
0.0
0.0
0.0
Total Generator
kW
0.0
kVA
0.0
kVAr
pf
0.0
30 40
20
10
FreqVoltVoltVolt
0.0
0.0
0.0
0.00
0.0
0.0
0.0
StatusScheduleI/OAlarmsEngine Generator
70
07:10
kWh+
kVAh
kVArh
50
60
0.0
0.0
0.0
00399
Figure 2-13. Generator Tab Screen
Alarms Tab
The Alarms tab displays warnings, electrical trip and shutdown alarms, and any engine Diagnostic Trouble Codes
(DTC) that are occurring or have occurred previously. The first page on the Alarms tab displays the alarms that are
currently active. They are organized by alarm type.
SITE GENSET 7741 \ 7740
Return Delay 10:00:00
0.0 Hz
kW
GEN
Warning Shutdown Electrical Trip
kVAr
480V/277V 3-Phase
%
0.0
%
0.0
Total Generator
kW
0.0
kVA
0.0
kVAr
pf
0.0
0.00
0.0
0.0
0.0
07:10
kWh+
kVAh
kVArh
V
-
+
Engine
1/2
StatusScheduleI/OAlarmsEngine Generator
00400
Figure 2-14. Alarms Tab Screen (First Page)
Table 1: Possible Alarm Types
Alarm Type
Warning Yellow/Black
Electrical Trip Purple/Black
Shutdown Red/Black
ECU Code Blue/White
The second page of the Alarms tab shows the event log with a list of events, including normal operation events and
alarm notifications with the most recent events at the top of the list. All indexed events include the date and time of
the event, hours of runtime on the engine when it occurred, along with the event name or alarm type and details.
Color -
Background/Text
Graphic
Warning
Electrical Trip
Shutdown
Engine
36949 B MMG25I-35D-45I-55DF4 Operating Manual 19
General Information
SITE GENSET 7741 \ 7740
Return Delay 10:00:00
0.0 Hz
kW
Index Date Time Hrs Event Details
1 01/01/1970 00:00:01 0:00
GEN
2 02/06/1970 11:45:55 0:00
3 01/01/1970 00:00:00 0:00
4 01/01/1970 00:00:00 0:00
5 01/01/1970 00:00:00 0:00
V
-
+
6 01/01/1970 00:00:00 0:00
7 01/01/1970 00:00:00 0:00
8 01/01/1970 00:00:00 0:00
9 01/01/1970 00:00:00 0:00
10 01/01/1970 00:00:00 0:00
11
01/01/1970 00:00:00 0:00
12 01/01/1970 00:00:00 0:00
13 01/01/1970 00:00:00 0:00
2/2
kVAr
Shutdown
Shutdown
Warning
Shutdown
Shutdown
Shutdown
Shutdown
Shutdown
Shutdown
Shutdown
Shutdown
Shutdown
Shutdown
Figure 2-15. Alarms Tab Screen (Second Page)
To scroll down within the event log, press the Enter () button. The scroll bar will change to blue, signifying it is
active. Press the ▲ or buttons to scroll up or down in the event log. When finished, press the Enter () button again.
Input/Output Tab
The Input/Output (I/O) tab shows a list of digital inputs and outputs connected to the controller, whether they are
active and the current state (open/closed status) of the input and output.
SITE GENSET 7741 \ 7740
Return Delay 10:00:00
0.0 Hz
kW
Digital Inputs
Ip Description Active State Ip Description Active State
GEN
A
B
C
V
-
+
D
E
F
kVAr
G
H
I
J
K
480V/277V 3-Phase
Total Generator
kW
0.0
0.0
kVA
kVAr
0.0
%
0.0
0.00
pf
%
0.0
This is an event index 1
This is an event index 2
This is an event index 3
This is an event index 4
This is an event index 5
This is an event index 6
This is an event index 7
This is an event index 8
This is an event index 9
This is an event index 10
This is an event index 11
This is an event index 12
This is an event index 13
480V/277V 3-Phase
Total Generator
kW
0.0
0.0
kVA
kVAr
0.0
%
0.0
0.00
pf
%
0.0
07:10
kWh+
0.0
0.0
kVAh
kVArh
0.0
StatusScheduleI/OAlarmsEngine Generator
00405
07:10
kWh+
0.0
0.0
kVAh
kVArh
0.0
1/38
StatusScheduleI/OAlarmsEngine Generator
00406
Figure 2-16. Input/Output Tab Screen
Schedule Tab
The Scheduler tab shows the current configuration and status of the scheduler, located below the generator summary.
At the bottom of the screen, the maintenance configuration status and time remaining until an alarm, electrical trip
or shutdown will occur. The lamp(s) to the left shows the configuration status of the maintenance alarm, not the alarm
condition.
20 MMG25I-35D-45I-55DF4 Operating Manual 36949 B
General Information
SITE GENSET 7741 \ 7740
Return Delay 10:00:00
0.0
kW
Scheduler Enabled to run Reserved Reserved
Event Week Day Start Stop Duration Event Week Day Start Stop Duration
GEN
V
-
+
All Monday 00:00 00:00 0:00
1
All Monday 00:00 00:00 0:00
2
All Monday 00:00 00:00 0:00
3
4
All Monday 00:00 00:00 0:00
All Monday 00:00 00:00 0:00
5
All Monday 00:00 00:00 0:00
6
All Monday 00:00 00:00 0:00
7
All Monday 00:00 00:00 0:00
8
Maintenance
1 250:00
2 500:00
3 3000:00
1/1
kVAr
250 hr Maint. - Refer to Manual
500 hr Maint. - Refer to Manual
3000 hr Maint. - Refer to Manual
AlarmsEngine Generator
480V/277V 3-Phase
Total Generator
0.0
kW
Hz
9
10
11
12
13
14
15
16
I/O
0.0
kVA
0.0
kVAr
%
0.0
0.00
pf
%
0.0
All Monday 00:00 00:00 0:00
All Monday 00:00 00:00 0:00
All Monday 00:00 00:00 0:00
All Monday 00:00 00:00 0:00
All Monday 00:00 00:00 0:00
All Monday 00:00 00:00 0:00
All Monday 00:00 00:00 0:00
All Monday 00:00 00:00 0:00
StatusSchedule
07:10
kWh+
0.0
kVAh
0.0
kVArh
0.0
ActionDescriptionAlarm Hours Date Time
Warning
Warning
Warning
00407
Figure 2-17. Schedule Tab Screen
Status Tab
The Status tab contains the status and configuration of the controller, firmware and data connections.
SITE GENSET 7741 \ 7740
Return Delay 10:00:00
0.0 Hz
kW
kVAr
100%
Model
Application
USB ID
Supervisor State:
Engine State:
Load State:
Protections:
Logging
Log Dest:
Log Mode:
USB drive:
Host IP:
Host Port:
GEN
V
-
+
- CTS
- RTS
- DTR
- DSR
- DCD
1/1
Model
Application
USB ID
Bootloader
Ethernet
Link Quality
480V/277V 3-Phase
%
0.0
%
0.0
Total Generator
kW
0.0
0.0
0.0
0.00
Bootloader
Analogue
Engine:
Tot al mem
Log mem free
Log Time:
Slave IP:
Slave Port:
0.0
kVA
0.0
kVAr
pf
0.0
StatusScheduleI/OAlarmsEngine Generator
07:10
kWh+
kVAh
kVArh
00408
Figure 2-18. Status Tab Screen
Generator Monitoring
Generator information is displayed on both the Generator operator screen and Generator tab within the maintenance
screens. For more information, see Operator Screens and Maintenance Screens.
Engine Monitoring
Engine information is displayed on both the Engine operator screen and Engine tab within the maintenance screens.
For more information, see Operator Screens and Maintenance Screens.
Controller Information Displays, Functions and Reset
The Power Zone™ controller constantly monitors vital generator and engine functions for a number of operation,
alarm and fault conditions. When a fault condition occurs, the engine will shut down automatically and the main
display will show the fault that has caused the shutdown. To resume operation, the fault condition must be resolved.
To reset the controller and resume operation, press the Enter () button.
36949 B MMG25I-35D-45I-55DF4 Operating Manual 21
General Information
BELT TENSIONERS
Isuzu™ engines use only manual belt tensioners. John Deere™ engines use manual and automatic belt tensioners.
Adjust the belt using the manual tensioner according to the manufacturer’s specifications. The automatic tensioner
cannot be adjusted or repaired and is designed to maintain proper tension over the life of the belt. Units with the
automatic belt tensioner must be inspected according to manufacturer specifications.
22 MMG25I-35D-45I-55DF4 Operating Manual 36949 B
Section 3 - Operation
PRESTART CHECKLIST
Before starting the unit, carefully read the prestart checklist. Verify all items are checked before starting the unit. This
checklist applies to both manual and remote starting of the unit.
Read and understand ALL safety sections at the beginning of this manual.
Verify the Control Power switch is OFF (O).
Verify all circuit breakers are switched OFF (O).
For grounding requirements, follow any local, state, or National Electrical Code (NEC) guidelines.
Inspect all electrical cords; repair or replace any that are cut, worn, or bare.
Verify all electrical connections at the connection lugs are tight and wired correctly.
Verify the voltage selector switch is set to the desired voltage and locked.
Check the unit is level.
Thoroughly check for any water inside, on, or near the unit. Dry the unit before starting.
Check oil, coolant, and fuel levels. For more information, see General Maintenance.
Check engine fan belt tension and condition.
Check engine fan belt guard.
Check engine exhaust system for loose or rusted components.
Check radiator and surrounding shroud for debris.
Check to make sure none of the generator covers are loose or missing.
Verify all maintenance procedures are up to date. For more information, see General Maintenance.
Verify engine battery connections are secure.
Check that the battery disconnect switch is on.
Verify emergency stop switch is pulled out.
MANUAL STARTING OF THE UNIT
All units equipped with the Power Zone™ controller which will initially start up in Stop mode. Use the following procedure to start the generator in Manual mode:
1. Move the Control Power switch to ON (I).
DANGER
ASPHYXIATION. RUNNING ENGINES PRODUCES CARBON MONOXIDE, A COLOR-
LESS, ODORLESS, POISONOUS GAS. CARBON MONOXIDE, IF NOT AVOIDED, WILL
RESULT IN DEATH OR SERIOUS INJURY. (000103)
2. The LCD window will show the prestart diagnosis and the controller will load the unit management software.
TM
Image File Transer...
82%
00414
Figure 3-1. Prestart Screen
36949 B MMG25I-35D-45I-55DF4 Operating Manual 23
Operation
3. When the software is loaded, the Home screen will be displayed and the controller will be in Stop mode as
indicated at the top of the screen. Press the Auto/Manual Mode ( ) button to enter Manual mode.
Stop Mode
Time to Empty
15 hr
110
100
0.0 kW
GEN
V
-
+
60
50
40
30
20
10
0
90
80
70
%
3 PHASE
Volts
0
Amps
0
Figure 3-2. Home Screen
Note: The controller can be started from any screen when it is in Manual mode.
4. Pressing the green Engine Start (I) button on the controller will initiate the startup procedure and start the
engine, provided there are no engine faults preventing the unit from starting.
Full
3/4
1/2
1/4
Empty
74
%
00415
Note: It may take a few seconds for the engine to run smoothly and reach its governed operating speed. During this
time, the screen will show a voltage different from that set with the voltage selector switch.
5. If the engine does not start after the first cranking attempt, the engine will pause for 15 seconds to allow the
starter to cool. The LCD window will show “Manual Mode - Crank Rest” at the top of the screen. The engine
will make two more attempts to start for a total of three crank cycles.
6. Should the engine not start and run within three starting cycles, the LCD window will show the “Fail to Start”
alarm. The starting sequence may be repeated after the starter has had a minimum of two minutes to cool.
Pressing the Enter () button will clear the alarm and reset the controller.
Note: The engine controller may skip the preheat engine steps on some of the larger models.
7. Once the engine starts, it will immediately begin speeding up to a constant 1800 rpm. The engine may hunt
or change speeds until operating speed is reached. After a few minutes of operation, the engine will be
warmed up and the operator screens will show engine and generator operating parameters.
8. Check the generator for excessive noise or vibration and any coolant, oil, or fuel leaks before applying any
loads.
9. Verify the AC output voltage is correct. The output voltage can be fine adjusted by using the Voltage Adjust
screen as described in Shutting Down the Unit.
10. Check that the frequency (Hz) is correct on the Generator screen. With no loads connected to the generator,
the frequency should read approximately 60 Hz, depending on the type of engine governing used.
11. If all wiring connections have been made correctly, switch the main circuit breaker ON (I) and add loads
attached to the receptacles by switching the respective circuit breaker ON (I). You will notice a slight change
in engine sound when a load is applied to the unit.
AUTO (REMOTE) STARTING OF THE UNIT
Auto mode is used when the unit is started from a location other than the control panel by using a transfer switch.
Auto (remote start) is the normal setting when the unit is being used as a standby power supply. Before putting the
unit in Auto mode, review the Prestart Checklist and Manual Starting of the Unit. Also follow all safety warnings
24 MMG25I-35D-45I-55DF4 Operating Manual 36949 B
Operation
and information on isolating the generator with a transfer switch if the unit is to be used as a standby power supply.
See Transfer Switch, then continue with the steps described below:
1. Perform a manual start of the unit to verify the engine is operating correctly.
2. Remove the wires from the remote start terminal block to check the remote start circuit. Press the Auto/
Manual Mode ( ) button, the LCD window should show “Auto Mode” at the top of the screen. Attach a
jumper wire (minimum 16 gauge) across the two terminals on the remote start terminal block. This applies a
ground to the Power Zone™ Controller to close the starting circuit contacts. The engine should crank, start
and run.
3. Remove the jumper wire from the remote start terminal block and the engine will stop. Reconnect any nec-
essary wires from the remote start switch (transfer switch) to the remote start terminal block.
4. Verify the unit is in Auto mode. The LCD window should show “Auto Mode” at the top of the screen.
5. Close the main circuit breaker (set to ON (I)).
6. Secure unit by closing and locking all access doors.
7. The unit is now ready for remote starting.
Remote Start
Switch Terminals
The remote start terminal block provides a connection for installation of a remote start
switch which will allow the unit to be started by a remote dry-contact closure switch.
00886
For location of the remote start terminal block, refer to Control Panel.
Figure 3-3. Remote Start
Terminal Block
Before entering Auto mode, verify the contacts on any remote switch linked to the unit are OPEN. If the contacts on
a remote switch are closed, the engine will crank and start when Auto mode is entered. Attach the switch leads to
the two unused terminals on the unit’s remote start terminal block. For additional information, refer to Auto (Remote)
Starting of the Unit.
DERATING FOR ALTITUDE
All units are subject to derating for altitude and temperature; this will reduce the available power for operating tools
and accessories connected to the receptacles. Typical reductions in performance are 0.5% for every 1000 ft (305
m) and 2-4% for every 1000 ft (305 m) above 10,000 ft (3048 m) of elevation, and 1% per 10ºF (5.6ºC) increase in
ambient air temperature over 72ºF (22ºC).
GENERATOR OUTPUT CONNECTION LUGS
The unit is equipped with connection lugs, located on the lower portion of the control box behind the lug box door
on the right side of the unit. The lugs provide connection points for attachment of external loads to the generator. A
large decal on the inside of the control door details the proper connections for selected voltages.
WARNING
Only a trained and licensed electrician perform any wiring and related connections
to unit. Failure to follow proper installation requirements could result in death, serious
injury, and damage to equipment or property. (000155)
WARNING
Before any connections are made to the generator, verify the main circuit breaker
and the Control Power switch are OFF (O). Potentially lethal voltages may be present
at the generator connection lugs.
36949 B MMG25I-35D-45I-55DF4 Operating Manual 25
Operation
V
V
DANGER
IMPROPER OR INCORRECT CONNECTIONS TO A BUILDING’S ELECTRICAL SYSTEM
CAN CAUSE POTENTIALLY LETHAL VOLTAGES TO BACKFEED INTO UTILITY LINES.
THIS MAY RESULT IN INJURY OR ELECTROCUTION TO UTILITY WORKERS NEARBY.
VERIFY THE GENERATOR IS SUPPLYING POWER TO AN ISOLATED OBJECT OR
BUILDING THAT IS NOT CONNECTED TO ANY UTILITY LINES.
Connections to the lugs should be made by running the power cables up through the
opening in the bottom of the box. DO NOT make any connections directly to the lugs
without routing the cables through the opening. Use a hex wrench to tighten the cable
connections. The connection lug door is equipped with a safety interlock switch that
will trip the main circuit breaker and disable the voltage regulator, if the door is opened
while the unit is operating.
RUN CABLE THROUGH
OPENING IN BOTTOM
OF LUG BOX
Bonding
Plate
WARNING
Never attempt to disable or modify the lug door safety switch.
Equipment damage, personal injury or death may result.
A ground connection is located next to the connection lugs. The unit MUST be
connected to ground for proper operating safety. The generator neutral is bonded to
ground when it is shipped from the factory. The bonding plate will need to be removed
when the generator is used as a standby power source. INSTALLATION SHOULD
BE IN COMPLIANCE WITH THE NATIONAL ELECTRICAL CODE (NEC), STATE
AND LOCAL REGULATIONS.
01032
Figure 3-4. Bonding Plate
Location
FINE VOLTAGE ADJUSTMENT
Adjustment of the output voltage from the generator is necessary to provide the correct voltage to the end of the
power line. Voltage adjustment can be carried out at any time on the Voltage Adjust screen.
Manual Mode
Voltage Adjust
- Press , voltage will begin flashing
- Use and arrows to adjust voltage
- Press to confirm new voltage. Numbers will stop flashing
GEN
V
-
+
480
277
L-N Average
L-L Average
00396
Figure 3-5. Voltage Adjust Screen
V
1. With the unit running, press .
2. Press . The voltages displayed will begin flashing.
3. Use ▲ and ▼ to adjust the voltage.
4. Press to confirm the new voltage. The voltages displayed will stop flashing.
26 MMG25I-35D-45I-55DF4 Operating Manual 36949 B
-
+
Operation
VOLTAGE SELECTOR SWITCH
The voltage selector switch mechanically changes the connections between the generator output leads and the
connection lugs on the main control panel. Voltage ranges are selected by rotating the handle on the switch to the
desired voltage.
WARNING
Electric Shock: Never change the voltage selector switch while the engine is running
or the controller is on. If the engine is running or starts while the setting is changed,
severe arcing will occur, which may result in death, serious injury, damage to the
switch and generator windings.
The voltage selector switch is equipped with a lockout mechanism. Once the proper voltage has been selected,
insert a padlock through the lockout hole(s). By locking the handle in place, unauthorized changing of the voltage
setting is prevented.
120/208V 3-PHASE
120/
208V
277/
480V
Switch styles vary by model.
120/
240V
L1-L2 = 208V L1-N = 120V N =
L2-L3 = 208V L2-N = 120V
L3-L1 = 208V L3-N = 120V
VOLTAGES AT RECEPTACLES
RECEPTACLE L-L L-N
GFCI - 120V
GFCI w/Buck - 120V
Twist-locks 208V 120V
00085
120/
208V
277/
480V
Switch styles vary by model.
= Not recommended for normal use
120/
208V
277/
480V
Switch styles vary by model.
= Not recommended for normal use
120/
240V 3PH
120/
240V
1PH
277/480V 3-PHASE
L1-L2 = 480V L1-N = 277V N =
L2-L3 = 480V L2-N = 277V
L3-L1 = 480V L3-N = 277V
VOLTAGES AT RECEPTACLES
RECEPTACLE L-L L-N
GFCI - 139V
GFCI w/Buck - 120V
Twist-locks 240V 139V
00083
120/240V 3-PHASE
L1-L2 = 240V L1-N = 120V N =
L2-L3 = 240V L2-N = 208V
L3-L1 = 240V L3-N = 120V
VOLTAGES AT RECEPTACLES
RECEPTACLE L-L L-N
GFCI - 120V
GFCI w/Buck - 120V
Twist-locks 120V 0/120V
4 Position Voltage Selector Switch Option
00086
36949 B MMG25I-35D-45I-55DF4 Operating Manual 27
Operation
120/240V 1-PHASE
120/
208V
L1-L2 = - L1-N = 120V N =
L2-L3 = - L2-N = L3-L1 = 240V L3-N = 120V
120/
240V
VOLTAGES AT RECEPTACLES
RECEPTACLE L-L L-N
GFCI - 120V
GFCI w/Buck - 120V
Switch styles vary by model.
Twist-locks 240V 120V
00087
Figure 3-6. Voltage Selector Switch Connections
VOLTAGE REGULATION
The electronic voltage regulator controls the output of the generator by regulating the current into the exciter field.
The regulator has four screwdriver adjustable potentiometers that may be adjusted for U/F dip, under frequency
protention (U/F), stability, and voltage. The voltage regulator on the unit is adjusted before shipment from the factory.
Contact Generac Mobile Products for additional information before attempting to adjust the voltage regulator.
Note: For units equipped with a Marathon DVR2000E+ digital voltage regulator, please refer to the Marathon operating
manual provided with the unit.
CUSTOMER CONVENIENCE RECEPTACLES
The unit is equipped with five receptacles. The large receptacles are 240/120VAC twist-lock receptacles rated at
50A each. The smaller duplex receptacles are 120VAC rated at 20A each with ground fault circuit interrupt (GFCI)
protection. These receptacles are not routed through the main circuit breaker. Each receptacle has its own circuit
breaker, located above the connection lugs. Each breaker is sized to the maximum rating of the corresponding
receptacle.
28 MMG25I-35D-45I-55DF4 Operating Manual 36949 B
Operation
120V GFCI
Receptacles
125/250V
Twist-Lock
Receptacles
50A Circuit
Breakers
20A Circuit
Breakers
01034
Figure 3-7. Receptacle and Breaker Locations
Power to the receptacles is available any time the generator is running, EVEN IF THE MAIN
CIRCUIT BREAKER IS OFF (O). VERIFY EQUIPMENT CONNECTED TO THE RECEP-
TACLES IS TURNED OFF BEFORE TURNING THE BREAKERS ON. Verify the voltage
selector switch is in the proper position and that the output voltage is correct for the equipment
that is connected to the receptacles. Improper voltage may cause equipment damage or
malfunction.
Note: When the voltage selector switch is in position for 480/277V 3Ø, voltage at the two GFCI receptacles is 139
volts and the voltage at the three twist-lock receptacles is 240/139 volts. Generac Mobile Products does not
recommend using the receptacles in the 480V position. When the voltage selector switch is in position for 208/120V
3Ø, voltage at the three twist-lock receptacles and the two GFCI receptacles is 208/120 volts.
MAIN CIRCUIT BREAKER
The main circuit breaker is located on the main control panel. When the breaker is
OFF (O), power is interrupted between the connection lugs, the optional cam lock
receptacles, and the generator. Once the connections have been made to the
connection lugs or the optional cam lock receptacles, and the unit has been started
and allowed to reach normal operating temperature, the breaker may be switched ON
(I).
The main circuit breaker will be tripped, disconnecting power to the connection lugs
and the optional cam lock receptacles if any of the following items occur while the unit
is running:
00489
Figure 3-8. Main Breaker
36949 B MMG25I-35D-45I-55DF4 Operating Manual 29
Operation
1. Overload of the generator circuits to the connection lugs or the optional cam lock receptacles.
2. The door covering the connection lugs or the optional cam lock receptacles is opened.
3. If the emergency stop switch is activated.
Verify problems that cause the main circuit breaker to trip are corrected before returning the switch to ON (I).
The main circuit breaker interrupts power to the connection lugs and the optional cam lock
receptacles only. The control panel receptacles have power even if the main circuit breaker
is OFF (O). To disconnect power to these receptacles, use the individual circuit breakers
located near each receptacle.
EXHAUST FILTER CLEANING OPERATIONS
When enabled, the exhaust filter system goes through an automatic cleaning process knows as regeneration. Under
normal circumstances, regeneration occurs without interruption of unit operation and with minimal operator involvement. In the event there are conditions requiring the operation of the unit with the auto exhaust filter cleaning disabled,
the operator may be required to perform procedures to enable or disable the auto exhaust filter cleaning. The operator
may also be required to perform a manual regeneration. The following procedures describe how to perform these
functions.
WARNING
The area above and surrounding the exhaust system during an auto or manual exhaust
filter cleaning should be clear of any people and objects. Exhaust gases and compo-
nents can reach temperatures hot enough to ignite and melt common materials.
Note: Always park the unit in a safe location for elevated exhaust temperatures and check for adequate fuel level
before beginning the exhaust filter cleaning process. The cleaning cycle can take an extended period of time
(approximately 45 minutes). Cleaning is complete when the Regeneration indicator remains off.
Disable Automatic (Auto) Exhaust Filter Cleaning
The auto exhaust filter cleaning feature should always be enabled unless doing so would cause an unsafe working
environment. In the event that an unsafe working environment would occur, use the following procedure to disable
the auto exhaust filter cleaning feature:
1. Enter the maintenance screens by pressing ▲, ►, ▼, or ◄.
2. Press and hold () to enter the Running Editor.
3. Press ▼ to move the cursor (blue highlighted text) down to the Engine section.
4. Press () or ► to access the sections. Options should already be highlighted.
5. Press ► and then ▼ to highlight DPF Regen Inhibit. Press () to select the check box.
6. Press ▲ to mark the check box.
7. Press and hold () to save the settings. The display should return to the Home screen.
8. Verify the Home screen displays “DPF Regen Inhibit” above the kW meter and the load used gauge.
Force a Manual Exhaust Filter Cleaning
If running the unit with the exhaust filter cleaning function disabled, the DPF Status screen may display a red alarm,
prompting the operator to force a manual exhaust filter cleaning. Use the following procedure to force a manual
exhaust filter cleaning feature:
30 MMG25I-35D-45I-55DF4 Operating Manual 36949 B
Operation
1. Open the control door and locate the switch labeled “FORCE EXHAUST REGENERATION”.
2. Move and hold the switch into the position.
Enable Exhaust Filter Cleaning
If the environment no longer requires the function to be disabled and there are no alarms present on the DPF Status
screen, the auto exhaust filter cleaning function should be enabled. Use the following procedure to enable the auto
exhaust filter cleaning feature:
1. Enter the maintenance screens by pressing ▲, ►, ▼, or ◄.
2. Press and hold () to enter the Running Editor.
3. Press ▼ to move the cursor down to the Engine section.
4. Press () or ► to access the sections. Options should already be highlighted.
5. Press ► and then ▼ to highlight DPF Regen Inhibit. Press () to select the check box.
6. Press ▲ to unmark the check box.
7. Press and hold () to save the settings. The display should return to the Home screen.
8. Verify the Home screen no longer displays “DPF Regen Inhibit” above the kW meter and the load used
gauge.
TRANSFER SWITCH
The generator neutral is bonded to ground when shipped from the factory. The bonding
plate will need to be removed when the unit is used as a standby power supply. Installation
should be in compliance with the National Electrical Code (NEC), state and local regulations.
When the unit is used as a standby power supply, it must be equipped with a transfer switch which isolates it from
the utility’s distribution 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.
Incoming
Utility
Power
Utility
Meter
Emergency
Distribution Panel
(Generator Power)
Main
Distribution Panel
(Utility Power)
Transfer
Switch
WHITE = Incoming
Utility Power
GRAY = Normal Utility
Power Circuit
BLACK = Emergency
Generator Power Circuit
Power From
Generator
00206
Figure 3-9. Transfer Switch Operation
36949 B MMG25I-35D-45I-55DF4 Operating Manual 31
Operation
DANGER
FAILURE TO ISOLATE THE GENERATOR FROM THE NORMAL POWER UTILITY CAN
CAUSE POTENTIALLY LETHAL VOLTAGE TO BACKFEED INTO THE UTILITY LINES.
THIS MAY RESULT IN INJURY OR ELECTROCUTION OF UTILITY WORKERS NEARBY.
MAKE SURE THE GENERATOR IS ISOLATED BY A TRANSFER SWITCH FROM ANY
LOCAL UTILITY LINES. THIS ALSO APPLIES IF THE GENERATOR IS BEING USED
AS A BACKUP TO SOME OTHER TYPE OF POWER SUPPLY.
Installation of a transfer switch or other type of remote starting device is the responsibility of the user. Installation of
such devices must be performed by following all directions supplied by the manufacturer of the switch. If attaching
the unit to a power supply normally serviced by a utility company, notify the utility company and check state and local
regulations. Familiarize yourself with all instructions and warning labels supplied with the switch.
WARNING
Only a trained and licensed electrician perform any wiring and related connections
to unit. Failure to follow proper installation requirements could result in death, serious
injury, and damage to equipment or property. (000155)
When using the unit as a standby or substitute power supply, make sure the output voltage
and phase rotation of the generator match those of the local power utility. Improper voltage
or phase rotation may cause equipment damage or malfunction.
AUTO EXERCISE TIMER
The Power Zone™ controller is capable of starting and stopping the unit automatically, based on a programmable
schedule.
Units installed in a standby application should be exercised regularly to maintain operating condition and to ensure
responsiveness in an emergency situation. Use the following procedures to operate the unit in Auto mode:
Accessing the Configuration Menu
1. With the unit stopped, press ▲, ►, ▼, or ◄ to navigate to the maintenance screens from any of the operator
screens.
2. While on any maintenance screen, press () and (O) simultaneously. The controller will display the Config-
uration menu.
3. To save any changes and exit the Configuration menu, press and hold () for five seconds. To cancel any
changes and return to the maintenance screen, press and hold (O) for five seconds.
Set the Controller Clock
The schedule runs based off the time set in the controller clock. Use the following procedure to set the controller
clock BEFORE setting the schedule:
1. Navigate to the Maintenance group and press ► to access it.
2. Press ► to select the Time section.
3. Set the time and date to the correct local time.
32 MMG25I-35D-45I-55DF4 Operating Manual 36949 B
Operation
Set the Schedule
1. Access the Scheduler group by pressing the ► button.
Note: The Scheduler group is made up of the Scheduler Options and Scheduler Setup sections. Each section can
be accessed and exited using the ► and ◄ buttons.
2. Access the Scheduler Options section. Within this section, the scheduler can be enabled, run mode
selected, and load mode selected.
Table 2: Scheduler Options
Item Values
Enable Yes/No
Run Mode Monthly/Weekly
Load Idle, In Island, On Load, Off Load
3. Access the Scheduler Setup section. Within this section, each schedule entry can be modified by pressing
the () button to select the item and the ▲ and ▼ buttons to define them.
Table 3: Scheduler Setup
Item Values
Schedule Entry 1-16
Start Time 00:00-23:59
Duration 00:00-99:59
Day Monday-Sunday
Week (of month) First, Second, Third, Fourth
Note: The controller must be in Auto mode to run at the programmed time. Use a trickle or solar battery charger to
prevent the controller from draining the battery while in Auto mode.
Set the Unit to Auto Mode
1. From any operator or maintenance screen, press and hold the Auto/Manual Mode ( ) button for five seconds,
or until Auto mode is displayed at the top of the screen.
Note: If any of the scheduled time slots are currently active, the controller will begin the starting sequence and start
the unit provided there are no shutdown conditions present.
SHUTTING DOWN THE UNIT
Prior to shutting down the unit, check with personnel using power supplied by the generator and let them know that
the power is going to be turned off. Make sure the power shut down will not create any hazards by accidentally
turning off equipment that needs to be kept on (pumps, compressors, lights, etc.).
1. Remove all loads from the generator by opening all circuit breakers (turn OFF (O)).
2. Let the engine run for approximately five minutes to allow it to cool down.
36949 B MMG25I-35D-45I-55DF4 Operating Manual 33
Operation
3. Push (O). Pressing the red Engine Stop/Reset (O) button will result in the generator going into the shutdown
cycle and starting a 15 second shutdown timer called stopping. If the unit does not shut down within 15 seconds, a stop fail alarm will be displayed on the LCD window.
4. After the unit shuts down, move the Control Power switch to OFF (O).
Note: For extended storage time, disconnect the battery. See the engine operator’s manual for extended storage
requirements.
EMERGENCY STOP SWITCH
The unit is equipped with one emergency stop switch. For location of the emergency
stop switch, refer to Component Locations. The red button is clearly labeled
“EMERGENCY STOP.” The switch can be accessed and activated with all doors closed
and locked.
Activate the emergency stop switch by pushing it in until it locks down. This will trip
the main circuit breaker which will open the contact, disconnecting the load to the
connection lugs. This will also open the fuel circuit, shutting down the engine. The
emergency stop fault will be displayed on the control panel. The switch will remain
locked until it is pulled out.
Figure 3-10. Emergency
G
E
R
N
E
M
E
C
Y
S
T
P
O
Stop Switch
00230
CAUTION
Equipment Damage. The emergency stop switch is not to be used to power down the unit
under normal operating circumstances. Doing so will result in equipment damage. (000246)
IDLE SWITCH (MMG25I-45I ONLY)
The idle speed is 1000 rpm. The engine will start at idle speed and run at idle for 15 seconds no matter what position
the idle switch is in. After 15 seconds of running at idle, the unit will ramp up to 1800 rpm if the idle switch is off.
Otherwise the unit will continue to idle if the idle switch is on.
When the engine is at idle speed (1000 rpm), the voltage regulator will not function and the output voltage is dropped
out by the voltage regulator.
Note: Avoid long periods of idling as it may cause rapid wear to the engine.
Do not apply a load to the unit when the engine is running at idle speed or equipment damage
could result.
TOWING THE UNIT
Once the engine is shut down, follow these steps to prepare the unit for towing.
1. Use the tongue jack to raise or lower the trailer onto the hitch of the towing vehicle. Lock the hitch coupling
and attach the safety chains or cables to the vehicle. Release the jack locking pin and rotate the jack into the
travel position. Make sure the locking pin snaps into place.
Note: A film of grease on the coupler will extend coupler life and eliminate squeaking. Wipe the coupler clean and
apply fresh grease each time the unit is towed.
2. See Jack Maintenance for proper operation and maintenance of the jacks. For maintenance interval infor-
mation, see Maintenance.
34 MMG25I-35D-45I-55DF4 Operating Manual 36949 B
Operation
3. Connect any trailer wiring to the tow vehicle. Check for proper operation of the directional and brake lights.
4. Make sure the doors are properly latched.
5. Check for proper inflation of the trailer tires. For maximum tire pressures, refer to Specifications.
6. Check the wheel lugs. Tighten or replace any lugs that are loose or missing. If
a tire has been removed for axle service or replaced, tighten the lugs, in the
order shown, to the following specifications:
a. Start all lug nuts by hand.
b. First pass tighten to 20-25 ft-lbs (27-33 Nm).
c. Second pass tighten to 50-60 ft-lbs (67-81 Nm).
1
4
3
2
5
d. Third pass tighten to 90-120 ft-lbs (122-162 Nm).
Note: After the first road use, re-torque the lug nuts in sequence.
Figure 3-11. Lug Sequence
7. Maximum recommended speed for highway towing is 45 mph (72 km/h). Recommended off-road towing
speed is not to exceed 10 mph (16 km/h).
LIFTING THE UNIT
Central Lift Point
A central lift point is located on the top of the unit. The
central lift point is connected to a lift structure inside the
unit. Attach a sling or hook directly to the central lift point
only if the devices are in good condition and the equipment being used to raise the unit has sufficient capacity.
For approximate weights, refer to Specifications. Always
remain aware of people and objects around when moving
or lifting the unit. Keep the doors closed and locked.
01035
00204
Figure 3-12. Central Lift Point Location
36949 B MMG25I-35D-45I-55DF4 Operating Manual 35
Operation
This Page Intentionally Left Blank
36 MMG25I-35D-45I-55DF4 Operating Manual 36949 B
Section 4 - Maintenance
EMISSIONS INFORMATION
For emissions information, see the OEM engine manual.
DAILY WALK AROUND INSPECTION
Look for conditions that could hinder performance or safety, such as (but not limited to) oil/coolant/fuel leakage,
blocked vents, loose/missing hardware, and electrical connections.
Visually inspect the fan belt for cracks, fraying, stretching, and verify the belt is properly seated in the pulley grooves.
Replace the belt according to the manufacturer’s recommendations.
Note: At the 500 hour/12 month service interval, it is recommended that the belt be removed and checked for wear.
While the belt is removed, inspect pulleys and bearings. Rotate and feel for hard turning or unusual sounds. If pulleys
or bearings need replacement, contact the engine manufacturer.
Failure to perform a daily inspection may result in serious damage to the prime mover.
GENERAL MAINTENANCE
Normal maintenance service and replacement of parts are the responsibility of the owner and are not considered
defects in materials or workmanship within the terms of the warranty. It is strongly recommended that the equipment
be periodically checked by an Independent Authorized Service Dealer.
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. NEVER perform routine
service (oil/filter changes, cleaning, etc.) unless all electrical components are shut off. Before servicing the unit,
always follow the instructions listed below.
• Verify the Control Power switch is turned OFF (O).
• Verify the circuit breakers are turned OFF (O).
• Activate (push in) the emergency stop switch.
• Disconnect the negative (-) terminal on the battery.
• 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.
• Never wash the unit with a high pressure hose or with any kind of power washer.
• Never wash the engine block or fuel tank with a power washer or steam cleaner. Water may enter the cabinet
and collect in the generator windings or other electrical parts, causing damage.
• If the unit is stored outside, check for water inside the cabinet and generator before each use. If wet, dry the
unit thoroughly before starting.
• Inspect condition of electrical cords. DO NOT use the unit if insulation is cut or worn through.
• Check condition of the air filter by viewing the level of the vacuum draw on the filter minder gauge. Replace
the air filter when the yellow center bar reaches the red section on the gauge (20 in. H2O).
• Check wheel lugs. See Towing the Unit.
• Check coolant level daily. Refer to the engine operator’s manual for coolant recommendations and proper
mixture.
○ Coolant is checked visually by inspecting the level in the coolant overflow jug located near the radiator.
○ Normal operating level is between the FULL and ADD markings on the overflow jug, which is known as
36949 B MMG25I-35D-45I-55DF4 Operating Manual 37
Maintenance
normal range.
○ WHEN ENGINE IS STOPPED AND COMPLETELY COOL, coolant may be added directly to the coolant
overflow jug.
• Check the oil level daily. Refer to the engine operator’s manual for the proper viscosity grade of oil, including
special operating conditions such as a change in season or climate.
○ DO NOT start the unit if the engine oil level is below the add mark on the dipstick.
○ Normal operating level is in the cross-hatch pattern between the full and add markings on the dipstick.
○ Add oil only if the oil level is below the add mark on the bottom of the cross-hatch pattern on the dipstick.
DO NOT OVERFILL the crankcase.
• Check the fuel level.
• If the unit is connected to a remote start or transfer switch, make sure the remote switch is also off and tagged.
Note: If the engine was run out of fuel or the fuel tank was drained, it may be necessary to bleed the fuel lines. See
the engine operator’s manual supplied with the unit.
38 MMG25I-35D-45I-55DF4 Operating Manual 36949 B
BASIC MAINTENANCE SCHEDULE - ISUZU ENGINE
See the original equipment manufacturer’s operating manual for a complete list of mainte-
nance requirements. Failure to comply with the procedures as described in the engine
operator manual will nullify the warranty, decrease performance and cause equipment
damage or premature equipment failure. Maintenance records may be required to complete
a warranty request.
Use the schedule in the following table as a guide for regular maintenance intervals.
First 50
Hours
Item Daily
Check Oil Level
Check Coolant Level
Check Fuel Level
Drain Fuel Filter
Check Tire Pressure
Check All Electrical Connections
Clean Battery
Check Fan Belt Tension (Replace If Necessary)
Inspect Radiator Fins for Debris, Clean as Required
Preheating Condition Check
Check Engine Starting Conditions and Noise Conditions
Check Exhaust Smoke Condition
Replace Engine Oil
Replace Fuel Filter Elements
Clean Water Sedimenter Element
Electromagnetic Pump Filter Replacement or Cleaning
Oil Filter Element Replacement
Replace Air Filter Element
Lubricate Leveling Jacks
Check Generator Drive Plate Torque (See Checking Gener-
ator Drive Plate Torque)
Replace Fan Belt
1
For MMG25IF4 only.
2
For MMG45IF4 only.
3
If the unit is operated in a harsh environment or fuel quality is questioned, replace every 250 hours instead
of every 500 hours.
♦
♦
♦
♦
♦
♦
♦
♦
♦
♦
♦
♦
(Break-
In
Period)
♦
♦♦
Every
250
Hours
1
♦
Maintenance
Every
500
Hours
2 3
♦
3
♦
3
♦
3
♦
Hours
♦
♦
♦
Every
2000
♦
36949 B MMG25I-35D-45I-55DF4 Operating Manual 39
Maintenance
BASIC MAINTENANCE SCHEDULE - JOHN DEERE ENGINE
See the original equipment manufacturer’s operating manual for a complete list of mainte-
nance requirements. Failure to comply with the procedures as described in the engine
operator manual will nullify the warranty, decrease performance and cause equipment
damage or premature equipment failure. Maintenance records may be required to complete
a warranty request.
Use the schedule in the following table as a guide for regular maintenance intervals.
First
Item Daily
Check Oil Level
Check Coolant Level
Check Fuel Level
Check Tire Pressure
Check All Electrical Connections
Inspect Radiator Fins For Debris, Clean As
Required
Check Fuel Filter/Water Separator Bowl
Check Air Cleaner Dust Valve Restriction Indicator Gauge
Perform Visual Walkaround Inspection
Check Oil Vapor Recirculation System/NonReturn Valve
Change Engine Oil and Replace Oil Filter
Replace Oil Vapor Recirculation Filter
Service Battery
Replace Fuel Filter Elements
Check Engine Mounts
Check Air Intake Hoses, Connections, and
System
Check Engine Electrical Ground Connection
Check Automatic Belt Tensioner and Belt
Wear
Check Cooling System
Lubricate Leveling Jack(s)
Check Generator Drive Plate Torque (see
Checking Generator Drive Plate Torque)
Replace Air Cleaner Elements
Replace Alternator and Fan Belts
Test Thermostats
Check Fuses
Add Coolant
Check Electrical Wiring and Connections
♦
♦
♦
♦
♦
♦
♦
♦
♦
1
100
Hours
(Break-
In
Period)
♦
Every
250
Hrs.
♦
Every
500
Hrs./12
Months
2
♦
♦
♦
♦
♦
♦
♦
♦
♦
♦
♦
Every
2000
Hrs.
♦
♦
Every
6000
Hrs./ 72
Months
♦
As
Require
d
♦
♦
♦
40 MMG25I-35D-45I-55DF4 Operating Manual 36949 B
Maintenance
1
2
Replace primary air cleaner when dust valve restriction indicator gauge shows a vacuum of 25 in. H2O.
If not using John Deere Plus 50 II engine oil, the interval must be decreased to every 250 hours.
ISUZU ENGINE BREAK-IN REQUIREMENTS
Note: The EPA final Tier 4 Isuzu engines have an engine break-in duration that will prohibit the unit from providing
rated standby power upon factory delivery. The unit is tested at the factory and is initially capable of a prime standby
power output. The engine performance will increase to 95% of full rated power during the first 20 hours of loaded
operation. The unit will provide full rated power after the complete engine break-in period of 70 hours of loaded
operation.
Operate the engine at heavy loads (60-90% of rated output maximum) as much as possible during the break-in
period. If the engine has spent significant time at idle, constant speed(s) and/or light load or if makeup oil is required,
a longer break in period may be needed. Refer to the engine operator’s manual for a full description of necessary
procedures on the addition of oil and extension of the break-in period. For more information on regular maintenance
intervals, see Basic Maintenance Schedule - Isuzu Engine.
JOHN DEERE ENGINE BREAK-IN REQUIREMENTS
Note: During the first 20 hours of operation, avoid long periods of no load or sustained maximum load operation. If
the generator is to run for longer than five minutes without a load, shut the generator down.
John Deere engines are supplied with engine break-in oil from the factory. Extra care during the first 100 hours of
engine operation will result in better performance and longer engine life. DO NOT exceed 100 hours of operation
with the break-in oil. Operate the engine at heavy loads (60-90% of maximum) as much as possible. If the engine
has spent significant time at idle, constant speed(s), and/or light load, or if makeup oil is required, a longer break in
period may be needed. Refer to the engine operator’s manual for a full description of necessary procedures on the
addition of break-in oil and extension of the break-in period. For more information on regular maintenance intervals,
see Basic Maintenance Schedule - John Deere Engine.
RESETTING THE MAINTENANCE ALARMS
The Power Zone™ controller will display a warning message when the unit is due for maintenance or service. The
maintenance or service interval is set at 250, 500 and 3000 hours of engine running time. Once the unit has been
serviced, the appropriate maintenance alarm reminder needs to be reset. The following procedure demonstrates
how to reset the maintenance alarms:
1. With the unit shut down, move the Control Power switch to ON (I). After initialization, the controller will toggle
automatically to the Home screen.
2. Press ▲, ►, ▼, or ◄ to enter the maintenance screens.
3. Press () and (O) simultaneously. The next screen will display the Configuration menu.
4. Press to move the cursor (blue highlighted text) down to the Maintenance group.
5. Press ► to access the sections. Press to highlight the Maintenance section.
6. Press ► to access the parameters and highlight the maintenance alarm that needs to be reset.
7. Press () to select the editable parameters. The cursor will highlight “Not Reset” under the selected mainte-
nance alarm. Press to highlight “Reset”.
8. Press () to reset the selected maintenance alarm.
36949 B MMG25I-35D-45I-55DF4 Operating Manual 41
Maintenance
9. To perform additional maintenance alarm resets, repeat steps 6 - 8.
Note: If the selected maintenance alarm does not need to be reset, press to highlight “Not Reset” and press ()
return to the parameters section.
10. To save changes, press and hold () for five seconds. To discard changes made, press and hold (O) for five
seconds.
EXHAUST FILTER SERVICE REQUIREMENTS
The exhaust filter system contains a Diesel Particulate Filter (DPF). Over time, the DPF will require professional
servicing to remove ash buildup. The expected service interval will be at least 3,000 or 4,500 hours, based on engine
power and operating conditions. Actual service should take place when the indicator light appears on the Power
Zone™ controller. The DPF should be cleaned or replaced by an authorized service provider only. The removal of
DPF ash must be done by removing the DPF from the unit and placing it into specialized equipment.
CAUTION
Do not remove ash by using water or other chemicals. Removing ash by these methods
may cause equipment damage and create unsafe operating conditions.
CAUTION
Only a qualified service provider should remove, handle and dispose of DPF ash. These
materials may be considered hazardous under federal, state and local regulations, and must
be handled and disposed of properly.
To avoid unnecessary buildup of diesel particulates or soot in the exhaust filter system:
• Utilize the Automatic Exhaust Filter Cleaning mode.
• Avoid unnecessary idling.
• Use proper engine oil. Refer to the engine operator’s manual.
• Use only ultra low sulfur diesel fuel. Refer to the engine operator’s manual.
CHECKING GENERATOR DRIVE PLATE TORQUE
Follow the procedure below to check the torque of the generator drive plate bolts in accordance with the maintenance
chart. Refer to Checking Generator Drive Plate Torque.
1. Disconnect engine starting battery.
2. Remove generator fan guard.
3. Tighten each of the drive plate bolts to the specification shown in Table 4.
Table 4: Drive Plate Bolt Torques
Unit ft-lbs (Nm)
MMG25IF4 30 (40)
MMG35DF4 40 (54)
MMG45IF4 30 (40)
MMG55DF4 40 (54)
42 MMG25I-35D-45I-55DF4 Operating Manual 36949 B
Maintenance
4. Install generator fan guard.
5. Connect battery.
JACK MAINTENANCE
The following procedures should be performed annually.
Side-Wind Models
• The internal gearing and bushings of the jack must be kept lubricated. Apply a small amount of automotive
grease to the internal gearing by removing the jack cover, or if equipped, use a needle nose applicator or
standard grease gun on the lubrication point found on the side of the jack near the crank. Rotate the jack
handle to distribute the grease evenly.
• A lightweight oil must be applied to the handle unit at both sides of the tube.
• If equipped, the axle bolt and nut assembly of the caster wheel must also be lubricated with the same
lightweight oil.
Top-Wind Models
• Apply a lightweight oil to the screw stem.
Oil
Grease
Grease
Oil
Grease
Oil
Oil
Oil
00243
Figure 4-1. Lubrication Points
TRAILER WHEEL BEARINGS
Some trailers are equipped with a grease zerk fitting to allow lubrication of the wheel bearings without the need to
disassemble the axle hub. To lubricate the axle bearings, remove the small rubber plug on the grease cap, attach a
standard grease gun fitting to the grease zerk fitting and pump grease into the fitting until new grease is visible around
the nozzle of the grease gun. Use only a high quality grease made specifically for lubrication of wheel bearings. Wipe
any excess grease from the hub with a clean cloth and replace the rubber plug when finished. The minimum
recommended lubrication is every 12 months or 12,000 miles (19,312 km). More frequent lubrication may be required
under extremely dusty or damp operating conditions.
36949 B MMG25I-35D-45I-55DF4 Operating Manual 43
Maintenance
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44 MMG25I-35D-45I-55DF4 Operating Manual 36949 B
Section 5 - Troubleshooting
TROUBLESHOOTING AUTOMATIC SHUTDOWN CONDITIONS
WARNING
Allow engine to cool before performing any troubleshooting procedures. Contacting
the engine when it is hot will cause personal injury.
Low Fuel Level Shutdown
1. Check fuel level on the Liquid Crystal Display (LCD) window. Verify the unit is sitting level to ensure an accurate
reading.
2. Check for leaks in fuel tank. The fuel tank should not run dry under normal circumstances. The engine con-
troller will shut the engine down when there is five percent of fuel remaining in the tank.
3. If fuel level is good and no leaks are found, check the fuel level sender and the connecting wiring for dam-
age. To check for continuity between the sender and the engine controller, remove the appropriate bolts
from the control panel to access the inside of the control box. See the appropriate DC wiring diagram Wiring
Diagrams for the proper path between the engine controller and the fuel level sender.
Low Oil Pressure Shutdown
1. Check engine oil level with the dipstick. The engine controller will shut the engine down when oil pressure is
less than 20 psi (138 kPa). Add oil if required.
2. Visually inspect engine for oil leaks.
3. If oil level is good, restart the unit and verify the loss of oil pressure. Shut the engine down immediately if the
oil pressure value does not read 5 psi (34 kPa) within five seconds.
4. Check oil pressure sender. To identify corrective action, see the troubleshooting section of the engine oper-
ator’s manual.
Low Coolant Level Shutdown
1. Allow engine to cool.
2. Check coolant level in the radiator. To access the radiator cap, remove the access panel from the top of the
enclosure directly above the radiator. Add coolant until it is 3/4 in. (2 cm) below the filler neck. Secure the
radiator cap back into its original position.
3. Inspect coolant hoses, engine block and water pump for visible leaks.
4. Check engine oil to verify no coolant has mixed with it (oil will appear milky if coolant is present). For addi-
tional information, see the engine operator’s manual.
High Coolant Temperature Shutdown
1. Check coolant level in the overflow jug.
2. Restart engine and read the coolant temperature to verify a high coolant temperature shutdown. Stop
engine immediately if the coolant temperature is 230°F (110°C) or more.
3. Allow engine to cool. Add coolant to the overflow jug if it is low and check the level of coolant in the radiator.
To access the radiator cap, remove the access panel from the top of the enclosure.
36949 B MMG25I-35D-45I-55DF4 Operating Manual 45
Troubleshooting
This Page Intentionally Left Blank
46 MMG25I-35D-45I-55DF4 Operating Manual 36949 B
Section 6 - Wiring Diagrams
AC WIRING - MMG25IF4, MMG45IF4
STUD
GROUND
G
GROUND BAR
GENERATOR
9
12
8
11
7
7
10
10
6
6
3
3
5
5
12
12
4
4
10-21
(3) JUMPER
WIRES ON PHASE
SWITCH 15-20, 12-17,
G
F+
F-
TO
GROUND
FRAME
GND
L0
L3
L2
MECHANICAL LUGS
L1
26
25
21
22
17
18
13
10 14
6
59
2
1
BN2
BN/WT3
TO
BAR
GND
GN/YL
GN/YL
CT-3
CT-2CT-1
BN/WT
OR/WT
PAIR BLK
L0
BLK
BLK
BLK
YL/WT
(T7)
(T9)
PAIR BLK
PAIR BLK
(L0)
GN/YL
GN/YL
PAIR BLK
L3
L2
L1
SHUNT
BK
RD
BL
12VDC
YL
MAIN
CIRCUIT
BREAKER
27
28
23
24
20
19
16
15
11
12
8
7
4
3
L3
L1
L2
WT
TO
BAR
GND
BK
BK/WT
TO
BAR
BL/YL BL/YL
BL/YL
BK/WT
BK/WT
GND
TO
BAR
GND
RD
TO
BAR
GND
BK
TB2
LUG
LUG
PANE L
LIGHT2
LED LEDLED
LIGHT1
LIGHT
WT
BK
WT
WT
BN
TO
BAR
GND
BK/WT
(HELD
LUG
CLOSED
DOOR
CNO
NORMALLY)
BK/WT
1
2
START
REMOTE
CONTACT
RD
OR/WT1
C
GY/OR
D
90580_ORG_10.14.14
TO
BAR
GND
TB3
TO
BAR
GND
GN/YL
L
BN/WT
OR/WT
YL/WT
BL/YL
LIGHT2
INTERIOR
LED
BK
WT
BK/WT
RD
BK
YL
BL
GN/YL
WT
UTSRPNM
W
V
BL/YL
K
LIGHT
SWITCH
PANEL/INTERIOR
OR/WT3
TO
BAR
GND
BN2
BN/WT3
OR/WT3
234567
1
BN/WT1
BK
BN1
BN
OR/WT2
BN/WT2
EFABGHJ
TO VREG
36949 B MMG25I-35D-45I-55DF4 Operating Manual 47
Wiring Diagrams
AC WIRING - MMG35DF4, MMG55DF4
STUD
GROUND
G
GROUND BAR
GENERATOR
9
12
8
11
7
7
10
10
6
6
3
3
5
5
12
12
4
4
10-21
(3) JUMPER
WIRES ON PHASE
SWITCH 15-20, 12-17,
G
F+
F-
TO
GROUND
FRAME
GND
L0
L3
L2
MECHANICAL LUGS
L1
26
25
21
22
17
18
13
10 14
6
59
2
1
BN2
BN/WT3
TO
BAR
GND
GN/YL
GN/YL
BN/WT
PAIR BLK
L0
CT-3
CT-2CT-1
OR/WT
BLK
BLK
BLK
YL/WT
(T7)
(T9)
PAIR BLK
PAIR BLK
(L0)
GN/YL
GN/YL
PAIR BLK
L3
L2
L1
SHUNT
BK
RD
BL
12VDC
YL
MAIN
CIRCUIT
BREAKER
27
28
23
24
20
19
16
15
11
12
8
7
4
3
RD
BK
L3
L1
L2
WT
TO
BAR
GND
BK
BK/WT
TO
BAR
GND
BAR
BL/YL BL/YL
BL/YL
LIGHT
PANEL/INTERIOR
OR/WT3
BK/WT
SWITCH
GND
TO
BAR
GND
TO
BAR
GND
LUG
DOOR
CNO
OR/WT1
(HELD
TO
BK/WT
CLOSED
NORMALLY)
BAR
GND
START
REMOTE
CONTACT
1
GY/OR
BK/WT
TO
BAR
GND
2
TB3
BN2
BN/WT3
OR/WT3
234567
1
TB2
WT
LUG
LIGHT2
BK
LED LEDLED
WT
LUG
LIGHT1
WT
BN
LIGHT
PANE L
LIGHT2
INTERIOR
LED
BK
WT
BL/YL
BK/WT
TO
BL/YL
TO
GND
BN/WT
YL
GN/YL
YL/WT
OR/WT
9
10
21
22
BL
RD
BK
WT
1
2
11
14
12
13
20
BN1
GY/OR
BN/WT1
OR/WT1
OR/WT2
8
4
7
18
15
24
23
BN/WT2
3
RD
BK
BN
5
17
16
BAR
GN/YL
BL/YL
6
19
24 PIN
CONN 20
90632_ORG_01.14.15
48 MMG25I-35D-45I-55DF4 Operating Manual 36949 B
Wiring Diagrams
AC WIRING - 4 POS. VOLTAGE SELECTOR SWITCH OPTION - MMG25IF4, MMG45IF4
G
STUD
GROUND
GENERATOR
GROUND BAR
RELAY
VOLT REGULATION
2
7
GN/YL
46 53
BL
RD
BN/WT
BK
GND
L0
BN/WT3
BLK
BLK
BN2
TO
GN/YL
GN/YL
GN/YL
GND
GN/YL
(L0)
(T7)
(T9)
BLK
BLK
BLK
BAR
RD1
81
BN3
BN/WT4
37
38
34
3329
30
17 21 25
18 22 26
5913
61014
1
2
RD1
9
8
7
6
5
4
12
11
10
3
12
1
(4) JUMPER
2
G
F+
F-
23-38, 27-33
WIRES ON PHASE
SWITCH 11-19, 13-21,
39
35
31
27
23
19
15
11
7
3
RD/BK
TO
FRAME
GROUND
40
36
32
28
24
20
16
12
4
TP0
12
3
8
4
L3
L2
MECHANICAL LUGS
L1
WT
WT
L3
L2
L1
SHUNT
12VDC
YL
MAIN
CIRCUIT
BREAKER
BLK
BLK
BLK
CT-3
CT-2CT-1
WT
WT
WT
WT
TO
BAR
GND
BK
BK/WT
TO
BAR
BL/YL BL/YL
BL/YL
BL/YL
LIGHT
SWITCH
PANEL/INTERIOR
OR/WT3
BK/WT
BK/WT
GND
TO
BAR
GND
RD
TO
BAR
GND
REMOVE JUMPERS FOR 4 POSITION PHASE SWITCH
TB2
BN3
BN2
BN/WT3
234567
BN/WT4
1
RD/BK
OR/WT3
OR/WT2
BN/WT2
BN/WT1
EFABG
BK
RD
BK
TO
BAR
GND
BK/WT
(HELD
LUG
CLOSED
DOOR
CNO
RD
BK
BN1
BN
OR/WT1
C
H
J
TO VREG
90581_ORG_10.14.14
NORMALLY)
START
REMOTE
CONTACT
1
GY/OR
D
BK/WT
2
TO
BAR
GND
TB3
TO
BAR
GND
GN/YL
L
WT
LUG
LIGHT2
BK
LED LEDLED
WT
LUG
LIGHT1
WT
BN
LIGHT
PANE L
LIGHT2
INTERIOR
LED
WT
BK/WT BK
TO
BAR
GND
RD
BK
YL
BL
WT
GN/YL
WT
UTSRPNM
W
V
BL/YL
K
36949 B MMG25I-35D-45I-55DF4 Operating Manual 49
Wiring Diagrams
AC WIRING - 4 POS. VOLTAGE SELECTOR SWITCH OPTION - MMG35DF4, MMG55DF4
G
GN/YL
STUD
GROUND
GENERATOR
GROUND BAR
RELAY
VOLT REGULATION
2
7
RD1
81
BN3
46 53
9
8
7
6
5
4
12
11
10
3
12
(4) JUMPER
G
F+
F-
WIRES ON PHASE
SWITCH 11-19, 13-21,
23-38, 27-33
TO
GROUND
FRAME
GND
L0
L3
L2
MECHANICAL LUGS
L1
BL
BN/WT
BK
BN/WT3
BLK
BLK
L3
L2
L1
SHUNT
12VDC
YL
MAIN
CIRCUIT
BREAKER
BLK
BLK
BLK
BN2
(L0)
(T7)
(T9)
BLK
BLK
BLK
BN/WT4
RD
TO
BAR
GND
GN/YL
GN/YL
GN/YL
GN/YL
CT-3
CT-2CT-1
WT
WT
WT
37
38
34
3329
30
17 21 25
18 22 26
5913
61014
1
2
RD1
39
40
36
35
32
31
27
28
24
23
19
20
15
16
11
12
4
TP0
12
7
3
2
1
RD/BK
3
8
4
RD
BK
RD
BK
WT
TO
BAR
GND
BK
BK/WT
TO
BAR
BAR
BL/YL BL/YL
BL/YL
LIGHT
PANEL/INTERIOR
OR/WT3
BK/WT
TO
TO
SWITCH
GND
BAR
GND
BAR
GND
LUG
DOOR
CNO
OR/WT1
(HELD
TO
GND
BK/WT
CLOSED
NORMALLY)
BAR
START
REMOTE
CONTACT
1
GY/OR
BK/WT
TO
GND
2
TB3
RD/BK
BN3
BN2
BN/WT3
BN/WT4
OR/WT3
234567
1
TB2
WT
LUG
LIGHT2
BK
LED LEDLED
WT
LUG
LIGHT1
WT
BN
LIGHT
PANE L
LIGHT2
INTERIOR
LED
BK
WT
BL/YL
BK/WT
TO
GND
BL/YL
TO
GND
BN/WT
YL
GN/YL
YL/WT
OR/WT
9
10
BK
1
21
20
22
REMOVE JUMPERS FOR 4 POSITION PHASE SWITCH
BL
RD
WT
2
11
14
13
BN/WT1
4
12
24
23
BN1
GY/OR
OR/WT1
OR/WT2
8
7
18
15
BN/WT2
3
RD
BK
BN
5
17
16
BAR
GN/YL
BL/YL
6
19
24 PIN
CONN 20
90633_ORG_01.20.15
50 MMG25I-35D-45I-55DF4 Operating Manual 36949 B
AC WIRING OPTION - STANDARD RECEPTACLES
Wiring Diagrams
3 POS BLK
L0 T7T9
BK
RD
BRKR
50
BK
RD
C
Y
W
X
G
GN/YL
BK
BRKR
50
BK
D
X
GN/YL
WT
RD
RD
Y
W
G
BK
BRKR
50
BK
E
X
G
GN/YL
WT
RD
RD
Y
W
GND STUD
BK
RD
BRKR20BRKR
20
BK
RD
WT
AB
BK RD
GFCI1
20
GN/YL
GFCI2
20
GN/YL
WTWT
GL0
2 POS BLK
L0 G
90582_ORG_08.18.14
AC WIRING OPTION - ENGINE HEATER
EDISON PLUG
WT
GN
BK
ENGINE
HEATER
90594_ORG_10.29.14
36949 B MMG25I-35D-45I-55DF4 Operating Manual 51
Wiring Diagrams
7 8
6
5
1
2
3 4
COM
NC
NO
POWER
RELAY
6
5
8
7
2
VOLTAGE RELAY
TO 120V
BREAKERS
WT
RD
BK
BK
WT
BK
BK
BK
BK
BK
BK
WT
BK
RD
BUCK
XFMR
X1
X3
X2
X4
H4
H2
H3
H1
3 POS BLK
L0
T7
T9
BRKR
20
BRKR
20
AC WIRING OPTION - BUCK TRANSFORMER
RD
BK
WT
VOLTAGE RELAY
WT
POWER
RELAY
TO 120V
BREAKERS
BK
COM
20
BRKR
20
BRKR
X4
H1
AC WIRING OPTION - PMG
BK
NO
BK
NC
X2
BUCK
XFMR
H3
BK
X3
H2
RD
X1
H4
BK
BK
BK
WT
PMG
BK
3 POS BLK
L0
90583_ORG_08.18.14
T9
T7
1
1
BN/WT
BN
234567
TB2
REMOVE JUMPERS FOR PMG
90589_ORG_08.18.14
52 MMG25I-35D-45I-55DF4 Operating Manual 36949 B
DC WIRING
Wiring Diagrams
NPRST
M
OR/WT
BN/WT
RS485
TO DISPLAY
YL/WT
RD/BK5
TO DISPLAY
GN/YL
BK/WT
POWER
TO
GND
YL
MODULES
TO EXPANSION
BAR
BK
SHLD
WT
BL
RD
BK
GN/YL
YL/WT
OR/WT
BN/WT
SHLD
CLR
BK
YL
RD/BK6
BK
CLR
F
U
RD
464544434142
WVU N
5455535251
COMCT4
CT2 CT3
CT1
N
STR
S2
S1
56
323133
SCR H L
302928 57 50494847
SCR
+
24 2322
SCR
27
25
L H SCR
26
CLR
U
CAN-LOW
V
WT
BL
L3L2L1
V1
USB
GEN VOLTS
NS1
L3S1L2S1
GEN CURRENT
L1S1
V2
L2 L3L1
BUS VOLTS
L1 LOAD
CURRENT
8660 ONLY
MSC
MPU
MODULE 7740
D
GEN
CLOSE
OUTPUT
SHUNT TRIP
RS232
ENGINE ECU
RS485
BK
LED
BK
H
V
CAN-HIGH
W
A
PHASE
SWICH
FLEXIBLE IF
BOX
PORT
PROGRAMMING
USB HOSTRJ45
ETHERNET
J1939 IS USED
B
SCR
CLR
SHLD
POWER
CONTROL
WT
BK
X
C
OUTPUT
O/P O/P
GOVERNOR AVR
LOAD SHED
AMB BEACON
RED BEACON
ALARM
FUEL TRANSFER
FAN CLUTCH
6 FET OUTPUTS
+VE
FORCE REGEN
1000RPM IDLE
OIL LEVEL
FUEL XFER ENABLE
LEAK DETECT
LUG DOOR
11 INPUTS
PHASE SW DOOR
50 Hz
LOW COOLANT
REMOTE START
RECONNECT DOOR
CRANK
FUEL
BATTERY
6
SWITCH
5
GND
TO
BAR
BK/WT
K
L
40
39
WT
BK
BA AB
JIHGFE
12 13
70
69687 1110983837363534
676665646362616019181716 15 65431
GY
ABCDEFGHI JK
CHRG ALT
OR
COMMON GROUND
AUX FUEL TANK SENDER
FUEL LEVEL (FLEXIBLE)
WATER TEMP
OIL PRESSURE
AB
-VE
+VE
2
RD/WT
RD/BK6
RD/BK
RD/BK4
RD/BK3
RD/VI
VI
RD/VI
N
M
A
BN/WT1
BN/WT1
BN/WT
OR/YL
OR/BK
GY/YL
GY/GN
GY/RD
GY/BL
GY/BK
GY/OR
RD/YL
RD/VI
VI/YL
RD/BK7
FUEL
RD/VI
OR/WT
VI/WT
WT/BL
WT/YL
WT/BK
WT/RD
OR/WT1
BK/WT
BK/WT
WT/VI
TO
BK/WT
RD/BK2
RD/VI
GND
RD/BK1
BN1
TO
TO
BAR
BCD
OR/WT1
GND
BAR
GND
BAR
RD/WT
RD/WT
FUSED FU&SW
TB1
BATT
RD
R
P
GY/OR
OR
J
E
OR/WT2
F
G
BN/WT2BNBK
BN1
P1
P2
A
B
BK
WT
BN/WT2
T7
PM600
HJK
BN
T9
VOLTAGE
L
GN/YL
BL/YL
RD
BK
F-
REGULATOR
TO
GND
BAR
RD
TO
BL/YL
GND
WT
BK
LED
LIGHT1
INTERIOR
SPLICE
BAR
31 PIN
CONN 2
MODULE
TO EXPANSION
VI1
7
VI
BK/WT
RD/BK2
OR/YL
OR/WT
OR/BK
BK/WT
29
15
19
11
12
18
BK/WT
RD/BK
OR/YL
OR/WT
OR/BK
BK/WT
FUEL
REMOTE
BEACON
AMBER
BEACON
RED
ALARM
F+
10
9
BK/WT
BK/WT
TO
BK/WT
TO
WT/YL
BK/WT
WT/RD
BK/WT
GY/BK
BK/WT
GY
BK/WT
WT/VI
BK/WT
VI2
BK/WT
VI1
BK/WT
GY/BK
BK/WT
GY/OR
RD2
GND
BAR
GND
31
30
27
26
3
6
28
16
17
4
5
8
1
25
24
23
22
21
20
14
13
2
TO
BAR
GND
BK/WT
RD2
90540_D_06.15.15
BK/WT
REGEN
PH SW
RD1
RD
TO
GND
TO
GND
BK/WT
(HELD
DOOR
87
30
BAR
S
BAR
TO
CLOSED
85
BK/WT
5
TO
GND
BAR
BK/WT
TO
BAR
5
6
5
50Hz
6
VI
VI1
86
RD/WT
RD3
20A
20A
234
RD
B
FUEL XFER
87
87A
30
ENABLE
BK/WT
TO
NC
85
OR/WT2
15A
15A5
W
GND
E-STOP
BK/WT
TO
BAR
SWITCH
GND
15A6
2
1
BAR
C
GND
VI/YL
RD3
FUSE
BAR
BLOCK
VI
G
FUEL
FUEL
VI/WT
GY/YL
CLUTCH
21 PIN
XFER
86
86
FAN
CONN1
GY/OR
RD4
GY/BK
RD/VI
87
85
87A
30
87
85
87A
30
6
IDLE
SWITCH
BAR
GND
NORMALLY)
FILTER
HEATED
BK/WT
TO
BAR
GND
RD/VI
RD/WT
RD/WT
20A
1
RD1
A
D
T
START
5
6
FORCE
CNO
K1
START
86
RD/YL
RD
BK
E
CHG ALT
BATT NEG
BATT POS SW
PLUG
NOT USED
TOGETHER
WHEN OPT
BK/WT
B
OIL
LOW
LEVEL
A
WT/YL
OPTIONAL
BK/WT
LEAK
DETECT
WT/RD
OPTIONAL
PLUG
NOT USED
TOGETHER
WHEN OPT
RD/BK RD/BK
A
BK/WT
B
LOW
COOLANT
GY/BK
C
BK/WT
DOOR
(HELD
CLOSED
SWITCH
GY
CNO
NORMALLY)
RECONNECT
BK
BK/WT
WT
WT/VI
FUEL
LEVEL
BK/WT
FUEL
FILTER
HEATED
VI2
150W MAX
OPTIONAL
BK/WT
FUEL
FILTER
HEATED
VI1
150W MAX
OPTIONAL
CB
BK/WT
FAN
CLUTCH
GY/OR
OPTIONAL
GND
FUEL
XFER
PUMP
PWR
OPTIONAL
RD2
BATTERY CONSTANT
ALARM
RUN
GND
12V
TELEMETRY
FOR ATT GENERAC USE ANALOG EXPANSION MODULE.
NOTES:
1. TO ADD OPTIONAL REMOTE ANNUNCIATOR (COMMUNICATIONS)
36949 B MMG25I-35D-45I-55DF4 Operating Manual 53
Wiring Diagrams
TRAILER LIGHTS WIRING
TRAILER PLUG
LEFT
RED
MARKER
LAMP
STOP-TURN
SIGNAL
LAMP
(LEFT)
LEFT
AMBER
MARKER
LAMP
BK
WT
RD
BK
WT
WT
BN
WT
YL
BN
WT
GNBKYL
BN
WT
BN
WT
GN
BN
WT
RD
BK
WT
BK
WT
BK
WT
RIGHT
AMBER
MARKER
LAMP
RIGHT
RED
MARKER
LAMP
STOP-TURN
SIGNAL
(RIGHT)
LAMP
WT
BN
WT
BN
LICENSE
PLATE
LAMP
90584_ORG_10.02.14
54 MMG25I-35D-45I-55DF4 Operating Manual 36949 B
WIRING HARNESS - ELECTRIC BRAKE OPTION
Wiring Diagrams
SPLICE
BRAKE
BRAKE BRAKE
SPLICE
SPLICE
SPLICE
SPLICE
SPLICE
SPLICE
BRAKE
BRAKE
BRAKE
SPLICE
SPLICE
SPLICE
SPLICE
SPLICE
WT
WT
WT
BL
BL
BL
SINGLE AXLE
TANDEM AXLE
TRI-AXLE
FRAME GND
WT
BATTERY
BL
BKBL
SPLICE
SPLICE
BL
WT BK
BREAKAWAY
SWITCH
90286_E_03.18.14
36949 B MMG25I-35D-45I-55DF4 Operating Manual 55
Wiring Diagrams
DC WIRING OPTION - 12V BATTERY CHARGER
EDISON PLUG
BLU
YEL/GRN
BRN
BATTERY
CHARGER
16/3
DC WIRING OPTION - LOW OIL LEVEL
RED
+
12 V
BATTERY
A
B
LOW
OIL
LEVEL
90595_ORG_10.31.14
BLK
-
90593_ORG_10.29.14
56 MMG25I-35D-45I-55DF4 Operating Manual 36949 B
Section 7 - Options & Accessories
GENERATOR CAM LOCK CONNECTIONS OPTION
The unit may be equipped with cam lock connections, located below the connection lugs. These receptacles provide
connection points for the attachment of external loads to the generator. A decal near the cam lock connections details
the proper connections for selected voltages.
WARNING
It is HIGHLY RECOMMENDED that only a trained and licensed electrician perform any
wiring and related connections to the generator. Installation should be in compliance
with the National Electrical Code (NEC), state and local regulations. Failure to follow
proper installation requirements may result in equipment or property damage, per-
sonal injury or death.
WARNING
Before any connections are made to the generator, verify the main circuit breaker
and the Control Power switch are OFF (O) and the negative (-) battery cable is
disconnected. Potentially lethal voltages may be present at the generator connection
lugs.
DANGER
IMPROPER OR INCORRECT CONNECTIONS TO A BUILDING’S ELECTRICAL SYSTEM
CAN CAUSE POTENTIALLY LETHAL VOLTAGE TO BACKFEED INTO UTILITY LINES.
THIS MAY RESULT IN INJURY OR ELECTROCUTION TO UTILITY WORKERS NEARBY.
MAKE SURE THE GENERATOR IS SUPPLYING POWER TO AN ISOLATED OBJECT
OR BUILDING THAT IS NOT CONNECTED TO ANY UTILITY LINES.
Connections should be made by plugging power cables equipped with series 16 taper nose 400A/600V cam lock
plugs into the cam lock receptacles. Secure the connection by rotating the plug a 1/2 turn to the right.
L1
L2
L3
N (Neutral)
G (Ground)
Black
Red
Blue
White
Green
01033
Figure 7-1. Cam Lock Connections
WARNING
NEVER attempt to disable or modify the lug door safety switch. Equipment damage,
personal injury or death may result.
A ground connection is located on the far right of the cam lock panel. The unit MUST be connected to ground for
proper operating safety. The generator neutral is bonded to ground when it is shipped from the factory. The bonding
plate will need to be removed when the generator is used as a standby power source. INSTALLATION SHOULD
BE IN COMPLIANCE WITH THE NATIONAL ELECTRICAL CODE (NEC), STATE AND LOCAL REGULATIONS.
36949 B MMG25I-35D-45I-55DF4 Operating Manual 57
Options & Accessories
VISCOUS FAN CLUTCH OPTION
The viscous fan clutch option allows the engine cooling fan to engage at lower speeds and disengage at higher
speeds, increasing cooling system efficiency. The cooling fan will engage at full speed when the coolant temperature
rises. When the fan is operating at full speed, it will switch to a slower speed when the coolant temperature drops.
There will be an audible difference when the engine cooling fan switches speeds. Depending on unit model, the
temperature ranges vary between 170°F and 200°F (77°C and 93°C).
58 MMG25I-35D-45I-55DF4 Operating Manual 36949 B
Service Log
OIL GRADE: _____________________________________ BRAND: __________________________________
COOLANT MIXTURE: _____________________________ BRAND: __________________________________
__________________________________________________________________________________________
__________________________________________________________________________________________
__________________________________________________________________________________________
__________________________________________________________________________________________
__________________________________________________________________________________________
__________________________________________________________________________________________
__________________________________________________________________________________________
__________________________________________________________________________________________
__________________________________________________________________________________________
Date
Hours to
Service
Oil Level
Coolant
Level
Date
Hours to
Service
Oil Level
Coolant
Level
59
Notes
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
60
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