Generac Power Systems 9344-2 User Manual
Part No. Cl274
OWNER'S
Manual
Series NP-75D
LIQUID-COOLED
RECREATIONAL VEHICLE
GENERATOR
Model No. 9344-2
Revision * (07/12/99)
POWER SYSTEMS. INC.
Printed in U.S.A.
GENERAL SAFETY RULES
THE MANUFACTURER SUGGESTS THAT THESE “RULES" FOR SAFE OPERATION BE
COPIED AND POSTED IN POTENTIAL HAZARD AREAS OF THE RECREATIONAL VEHI- A
CLE. SAFETY SHOULD BE STRESSED TO ALL OPERATORS AND POTENTIAL OPERA- Mk
A
TORS OF THIS EQUIPMENT.
Study these SAFETY RULES carefully before operat
ing or servicing applicable equipment. Become familiar
with this Owner's Manual and with your generator.
Safe, efficient and reliable operation can only be
achieved if generator is properly installed, operated
and maintained. Many accidents are caused by failing
to follow simple and fundamental rules or precautions.
The manufacturer suggests that these GENERAL
SAFETY RULES be copied and posted in potential
hazard areas of the recreational vehicle. Safety should
be stressed to all operators and potential operators of
equipment.
WARNING;
The engine exhaust from this product
contains chemicals known to the State
of California to cause cancer, birth
defects, or other reproductive harm.
The manufacturer cannot possibly anticipate every cir
cumstance that might involve a hazard. The warnings
in this Manual and on tags and decals affixed to the
unit are,
dure, work method or operating technique Generac
does not specifically recommend, you must satisfy
yourself that it is safe for you and others. You must
also make sure the procedure, work method or operat
ing technique that you chose does not render the gen
erator to be unsafe.
A For fire safety, the recreational vehicle generator must
^ be properly installed and maintained. Installation must
therefore, not all-inclusive. If you use a proce-
mr ■
always remain in compliance with applicable codes and
standards. In addition, the generator must be installed in
conformance to the manufacturer's detailed installation
instructions. Following installation, nothing must be done
that might render the generator in noncompliance with
such codes, standards and instructions.
A The RV generator produces extremely high and
^ dangerous electrical voltages and can cause dan
gerous, and possibly fatal, electrical shock. Avoid
contact with bare wires, terminals, etc. while the
unit is running. If you must work around an operat
ing generator, stand on an insulated, dry surface
to reduce shock hazard.
• Never work on this equipment or handle any elec
trical device while standing in water, while bare
foot, or while hands or feet are wet. Dangerous
electrical shock will result.
• Have the generator properly grounded (bonded)
during installation into the vehicle, either by solid
mounting to the vehicle frame or chassis or by
means of an approved bonding conductor. DO
NOT disconnect the bonding conductor, if so
equipped. DO NOT reconnect the bonding con
ductor to any generator part that might be
removed or disassembled during routine mainte
nance. If the grounding conductor must be
replaced, use only a flexible conductor that is of
No. 8 AWG copper wire minimum.
* •
• In case of accident caused by electric shock, shut down
the source of electrical power down at once. If this can
not be done, free victim from live conductor. AVOID
DIRECT CONTACT WITH THE VICTIM. Use a dry
board, dry rope, or other non-conducting implement to
free the victim from live conductor.
A Inspect fuel system frequently for leaks or dam-
^ age. Repair or replace any damaged or leaking
component immediately. Never attempt to change,
alter or modify the generator fuel system in any
way that might affect safety or compliance with
applicable codes and standards.
• The generator engine gives off DEADLY carbon
monoxide gas through its exhaust system. This
dangerous gas, if breathed in sufficient concentra
tions, can cause unconsciousness or even death.
This exhaust system must have been properly
installed, in strict compliance with applicable codes
and standards. Following installation, you must do
nothing that might render the system unsafe or in
non-compliance with such codes and standards.
The generator compartment must be completely
vapor sealed from vehicle interior. There must be
no possibility of exhaust fumes entering the vehi
cle interior. Never operate this equipment with a
leaking or defective exhaust system.
• Never use the generator or any of its parts as a
step. Stepping on the unit can stress and break
parts and may result in dangerous, fuel leakage,
oil leakage, etc.
A Do not smoke around the generator. Wipe up any
^ fuel and oil spills immediately. Never leave oily or
fuel soaked rags in the generator compartment or on
the generator itself. Keep the area around the gener
ator clean and free of debris.
A Adequate ventilation is required to expel toxic
^ fumes and gasoline vapors from the generator
compartment. Do not alter the installation of this
equipment in any manner that might obstruct air
and ventilation openings. Such openings must be
kept clear and unobstructed.
• Keep hands, feet, clothing, etc., away from drive
belts, fans and other moving parts of this equip
ment. Never remove any drive belt or fan guards
while the unit is operating.
• Inspect the generator periodically. Repair or replace
all damagecTor defective parts immediately.
A These generators can be converted to use LP gas
^ (propane) as a fuel. LP gas is highly EXPLOSIVE.
The gas is heavier than air and tends to settle in
low areas where even the slightest spark can
ignite the gas and cause an explosion.
A Before performing any maintenance on the gener-
“ ator set, disconnect its battery cables to prevent
accidental start up. Disconnect the cable from the
battery post indicated by a NEGATIVE, NEG or (-)
first. Reconnect that cable last.
IDENTIFICATION RECORD AND GENERATOR FEATURES
Engine Pre-heat Switch
1.
2. Engine Start/Stop Switch
10 amp DC Circuit Breaker
3.
4. 35 amp AC Circuit Breaker
30 amp Battery Charging Fuse
5.
Generator AC Output Leads
6.
7.
Remote Leads
Hourmeter
8.
Generator
9.
16
REFEREMCE NUMBER IDENTIFICATION
Fuel Return Connection
10.
Air Cleaner
11.
12. Oil Drain Hose
Oil Filter
13.
14. Oil Dipstick
Oil Filler Opening and Cap
15.
Fuel Filter
16.
14 amp Fuse
17.
1 --
TABLE OF CONTENTS
OPERATING INSTRUCTIONS
GENERAL SAFETY RULES
IDENTIFICATION RECORD AND
GENERATOR FEATURES.........
READ THIS MANUAL THOROUGHLY
Operation and Maintenance
How to Obtain Service....................................................... 3
Service Dealer Location................................................... 3
GENERATOR FAMILIARIZATION
Generator Applicability....................................................... 4
Installation.......................................................................... 4
Safety................................................................................. 4
Generator AC Connection Systenn
OPERATING INSTRUCTIONS
Generator Control Panel................................................. 5
• Hourmeter
• Engine Start/Stop Switch
• 10-amp Circuit Breaker
• Dual AC Circuit Breaker................................................. 5
• Preheat Switch............................................................. 5
Remote Start/Stop Panel................................................... 5
Before Start-up
Start the Generator............................................................ 6
Shutting Down the Generator
...................................................................... 5
..................................................................
ADDITIONAL INFORMATION
Automatic Low Oil Pressure Shutdown
High Coolant Temperature Shutdown
Overspeed Shutdown
Engine Governed Speed .............................................. 7
25-Hour Break-in Period
25-Hour Check-up Period
Freezing Temperature Operation.................................... 8
Attention Required After Submersion
Operating Precautions..................................................... 8
Effects of Moisture and Dirt............................................... 8
........................................................ 7
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inside cover
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1
4
7
7
8
7
8
SPECIFICATIONS
Fuel Requirements............................................................. 9
Recommended Fluids
Generator Specifications.................................................... 9
Engine Specifications......................................................... 9
........................................................
9
MAINTENANCE
Periodic Maintenance Schedule....................................... 10
3
5
5
5
6
Overload Protection for Engine DC Elec. System
• 10 amp Circuit Breaker................................................. 10
• 14 amp Fuse............................................................ 10
• 30 amp Fuse................................................................. 10
Checking Fluid Levels....................................................... 11
• Check Engine Oil
• Battery Fluid.................................................................. 11
• Engine Coolant.............................................................. 11
Inspect Generator Set
Inspect Cooling System................................................... 11
Changing Engine Oil........................................................ 11
Coolant Change
Miscellaneous Maintenance............................................. 12
• Cleaning the Generator
• Battery........................................................................ 12
Periodic Replacement Parts
TROUBLESHOOTING
ELECTRICAL DATA
..........................................................
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EXPLODED VIEWS AND REPAIR PARTS
WARRANTIES..
.................................................... ..36
............
14
........... 16
10
11
11
12
12
12
13
— 2 —
READ THIS MANUAL THOROUGHLY
If you don't understand any portion of this manual,
contact Generac for a demonstration of actual start
ing, operating and servicing procedures.
Throughout this publication and on tags and decals
affixed to the generator, DANGER, WARNING, CAU
TION and NOTE blocks are used to alert you to spe
cial instruction about a particular operation that may
be hazardous if performed incorrectly or carelessly.
Observe them carefully.
These safety warnings cannot eliminate the hazards
that they indicate. Strict compliance with the special
instructions while performing the service plus "com
mon sense" are major measures to prevent acci
dents.
The following definitions apply to DANGER WARN
ING, CAUTION and NOTE blocks found throughout
the manual.
DANGER: indicates an immediately hazardous sit
uation which, if not avoided, will result in death or
serious injury. Danger is limited to the most
extreme situations.
WARNING: Indicates a potentially hazardous situa
tion which, if not avoided, could result in death or
serious injury.
CAUTION: Indicates a potentially hazardous situa
tion which, if not avoided, may result in minor or
moderate injury. Caution may also be used to alert
against unsafe practices.
NOTE; Indicates a statement of company policy as
the message relates directly or indirectly to the safety
of personnel or protection of property.
These symbols indicate the following:
Points out important safety information and, if not
followed, could endanger personal safety and/or
property of yourself and others.
Potential explosion hazard
Potential fire hazard
A
Potential electrical shock hazard
A
The operator (driver) is responsible for proper and
safe use of the vehicle, equipment on the vehicle, and
the safety of all vehicle occupants. We strongly rec
ommend that the operator read this Owner's Manual
and thoroughly understand all instructions before
using this equipment. We also strongly recommend
instructing other occupants in the vehicle to properly
start and operate the generator. This prepares them if
they need to operate the equipment in an emergency.
OPERATION AND MAINTENANCE
It is the operator's responsibility to perform all safety
checks; to make sure that all maintenance for safe
operation is performed promptly; and to have the
equipment checked by an Authorized Dealer periodi
cally. Normal maintenance service and replacement
of parts are the responsibility of the Owner/Operator
and, as such, are not considered defects in materials
or workmanship within the terms of the warranty.
Individual operating habits and usage contribute to
the need for maintenance service.
Proper maintenance and care of your recreational
vehicle generator assures a minimum number of
problems and keeps your operating expenses at a
minimum. See your authorized Dealer/Distributor for
service aids and accessories.
HOW TO OBTAIN SERVICE
When your recreational vehicle generator set requires
servicing or repairs, simply contact an Authorized
Service Facility for assistance. Service technicians
are factory-trained and are capable of handling all of
your service needs.
When contacting an Authorized Service Facility or the
factory about parts and service, always supply the
complete model number and serial number of your
unit as given on its data plate.
The warranty on your generator is included in this
Owner's Manual, as well as listings for repair parts.
SERVICE DEALER LOCATION
TO LOCATE THE NEAREST GENERAC SERVICING DEALER, PLEASE CALL OUR 800 NUMBER.
ONLY DEALER LOCATION INFORMATION CAN BE OBTAINED AT THIS NUMBER.
1-800-333-1322
3 —
GENERATOR FAMILIARIZATION
GENERATOR APPLICABILITY
These generators have been designed and manufac
tured for supplying electrical power for recreational
vehicles. You should not modify the generator or use
it for any application other than for what it was
designed. If there are questions pertaining to its
application, write or call the factory. Do not use the
unit until you have been advised by a competent
authority.
DANGER: For fire safety, the generator must have
been properly installed in compliance with (1)
A
ANS1119.2-1975/NFPA 501C-1994 “Standard for
Recreational Vehicles”, Part III, “Installation of
Electrical Systems.” The generator also must have
been installed in strict compliance with the manu
facturer’s detailed installation instructions. After
installation, do nothing that might render the unit
in non-compliance with such codes, standards and
instructions.
You can use this generator to supply electrical power
for operating 120/240 volts, single phase, 60 Hertz,
AC electrical loads requiring up to 7,500 watts (7.5
kW) of power. Those electrical loads cannot exceed
62.5 AC amperes of current at 120 volts, or 31.2 AC
amperes at 240 volts.
CAUTION: Do not overload the generator. Some
installations may require that electrical loads be
alternated to avoid overloading. Applying exces
sively high electrical loads may damage the gener
ator and may shorten its life. Add up the rated
watts of all electrical lighting, appliance, tool and
motor loads the generator will power at one time.
This total should not be greater than the wattage
capacity of the generator. If an electrical device
nameplate gives only volts and amps, multiply
volts times amps to obtain watts (volts x amps =
watts). Some electric motors require more watts of
power (or amps of current) for starting than for
continuous operation.
Owners/Operators have the responsibility to make
sure that nothing is done that might render installation
unsafe or so it will not comply with applicable codes,
standards and instructions.
SAFETY
Before attempting to use the generator set, carefully
read GENERAL SAFETY RULES inside the cover of
this Manual. Comply strictly with these RULES to
prevent accidents and damage to equipment and/or
property. Generac suggests that copying and posting
GENERAL SAFETY RULES in potential hazard areas
of the vehicle. Stress safety to ail operators and
potential operators of this equipment.
GENERATOR AC CONNECTION SYSTEM
The generator is equipped with a dual stator AC
power windings. These two stator windings supply
electrical power to customer electrical loads by
means of a dual 2-wire connection system. Note,
however, the neutral is grounded.
The generator has been installed so that units power
120/240 volts AC loads (Figure 1); or you can rewire
them to connect only 120 volts AC electrical loads.
Be sure to add jumper wire between circuit breakers
(C.B. in Figure 2) when connecting for 120 volts.
Figure 1 — Connections for 120/240 Volts Only
prmT73 3fwrnp
11
'kTtf
T2 (WHITE)
-----------
120 V
— 240 V —
T1 (RED)
Figure 2 — Connections for 120 Volts Only
120 V
44
T3 (BLACK)
INSTALLATION
This Owner’s Manual has been prepared assuming
that competent, qualified technicians installed the
generators into recreational vehicles. We also
assume installer complied with all applicable codes,
standards and regulations pertaining to installation.
An INSTALLATION MANUAL was shipped with the
generator. That manual contains manufacturer’s
instructions and recommendations for installing the
unit into a recreational vehicle. Following installation,
installers should forward the Installation Manual to
Owner/Operators for their information.
__4__
OPERATING INSTRUCTIONS
GENERATOR CONTROL PANEL
See Figure 3 to identify the following components;
■ HOURMETER
Provides continuous indication of engine operating
time, in hours and tenths of hours. Use the hourmeter with the periodic maintenance tasks are completed
on a timely basis.
■ ENGINE START/STOP SWITCH
To crank and start the engine, hold switch at its
START position. Release the switch when the engine
starts. To stop an operating engine, press and hold
the switch in its STOP position until the engine shuts
off. The switch center position is the RUN position.
■ 10-AIVIP CIRCUIT BREAKER
Protects the DC control circuit against electrical over
load. If the fuse element has melted open due to over
loading, the engine cannot be cranked, engine preheat
and start functions cannot occur. The breaker is a
“push to reset” type.
Figure 3 — Generator Control Panel
___________
GENERAC
MOBILE GENERATOR
NP75D
___
_________
___________
PREHEAT SWITCH
The diesel engine is equipped with glow plugs, one
for each cylinder. When you press the preheat switch
(Figure 3), the glow plugs heat the engine combustion
chamber for quicker starts in cold weather. To pre
heat the combustion chamber for quicker starts in
cold weather. Press the switch between 15 and 30
seconds. Continue holding in the preheat switch
while cranking the engine until it starts.
NOTE: Refer to THE GENERATOR AC CONNEC
TION SYSTEM on Page 4. Individual installations will
differ. If an overload occurs, the dual breakers will
open the hot stator leads (11 and 44). When the gen
erator has been connected for 120 volts only, one of
the dual circuit breakers will open stator AC output
lead No. 11 (hot lead).
_
A remote mounted Start/Stop Panel (model #9044) is
available, which allows you to start and stop the gen
erator engine conveniently from inside the vehicle
(Figure 5).
You can also order a remote panel (model #9061 )
that includes meters and gauges for monitoring low oil
pressure, high coolant temperature and low coolant
level, in addition to a start/stop switch. The panel
also includes an ammeter, a voltmeter and an
hourmeter.
REMOTE START/STOP PANEL
Figure 5 — Remote Start/Stop & Gauge Panel
M DUAL AC CIRCUIT BREAKER
Rated at 35 AC amps, the circuit breaker (Figure 4) pro
tects the generator’s AC output circuit against overload
and provides a method of turning OFF the generator’s
120/240 volts AC output to vehicle circuits.
___________
— 5 —
BEFORE START-UP
Check Engine Crankcase Oil Level: Refer to
SPECIFICATIONS and MAINTENANCE sections for pro
cedures and recommendations.
CAUTION! Any attempt to crank or start the engine
before properly servicing it with recommended oil
will result in an engine failure.
NOTE: Engine was factory serviced with a high quali
ty oil classified “For Service CD” or “For Service CC”
and having a viscosity rating of SAE 30. The installer
may have refilled the crankcase with an oil more suit
able for ambient temperature ranges in your area.
• Check Coolant Level: Check coolant level prior to initial
use and at recommended intervals. Refer to SPECIFI
CATIONS and MAINTENANCE sections for procedures
and recommendations.
• Check Fuel Supply: Make sure an adequate supply of
clean fuel is available to the engine. Many installations
include a Fuel Shutoff Valve, which you must open before
starting the engine.
NOTE: On some installations, the generator may
have been provided with its own fuel tank. On other
installations, the generator may “share” with the vehi
cle’s fuel tank. When the vehicle’s tank is shared,
some installers may have installed a generator fuel
pick up tube in the shared tank that is shorter than the
vehicle’s pick up tube. When a shorter generator fuel
pick up tube is installed in the tank, the generator will
run out of gas while sufficient fuel remains in the tank
for vehicle engine operation.
START THE GENERATOR
To start the generator from either the generator con
trol panel or from the optional Remote Panel, proceed
as follows:
1. Turn OFF electrical loads, using whatever means provided.
NOTE: If starting from the generator panel, turn OFF
loads by setting the generator’s main circuit breaker
to OFF or OPEN. If starting from a Remote Panel,
turn OFF loads using whatever means is provided in
the vehicle (such as a main circuit breaker.)
2. Press the preheat switch (if engine is cold) for between
15 and 30 seconds.
3. At the same time, hold the Engine-Start/Stop Switch at
START and press the preheat switch to crank engine.
Release the switches when the engine starts.
4. Let the engine stabilize and warm up.
5. Turn ON electrical loads, using whatever means provided.
SHUTTING DOWN THE GENERATOR
1. Turn OFF electrical loads, using whatever means
provided.
2. Let the engine run at no-load for a few minutes to
stabilize internal temperatures.
3. Set the Engine-Run/Stop Switch to STOP position.
— 6
AUTOMATIC LOW OIL PRESSURE
ADDITIONAL INFORMATION
SHUTDOWN
The engine is equipped with a normally-closed (N.C.) oil
pressure switch (Figure 6). Engine oil pressure holds
the switch open during cranking and operation. Should
oil pressure drop below about 10 psi, the switch con
tacts close and the engine automatically shuts down.
Figure 6 — Low Oil Pressure Switch
HIGH COOLANT TEIVIPERATURE SHUTDOWN
This switch (Figure 7) is a normally open (N.O.) ther
mostatic device which is immersed in engine coolant.
Should engine coolant temperature exceed about
250°F (121 °C), the switch contacts close and the
engine shuts down.
Figure 7 — High Coolant Temperature Switch
Figure 8 — Engine Controller Circuit Board
NOTE: After an overspeed shutdown, the engine may
be cranked and re-started. However, if the engine
overspeeds again, the engine will shut down again.
ENGINE GOVERNED SPEED
The generator is equipped with a 4-pole revolving field
(rotor) which must be driven at 1800 rpm to produce
the unit’s rated AC frequency of 60 Hz. The diesel
engine governor was factory set to about 62 Hz. The
diesel engine governor was factory set to about 62 Hz.
(I860) at no-load. After installing it, the installation
technician should check and adjust the governed
speed. Setting the no-load frequency slightly high
helps prevent excessive frequency, rpm and voltage
droop under heavy electrical loading.
OVERSPEED SHUTDOWN
The generator control panel houses an Engine
Controller circuit board (Figure 8). That circuit board
receives AC frequency signals from generator stator
leads 11 and 22. Should AC frequency exceed about
72 Hz (2160 rpm), circuit board action initiates an auto
matic shutdown after a few seconds.
DANGER: Do not tamper with the engine governor
settings. Excessively high engine speeds are dan
gerous and increase the risk of personal injury and
damage to equipment an/or property. Excessively
low speeds impose a heavy load on the engine when
adequate engine power is not available and may
shorten engine life. The generator supplies correct
rated frequency and voltage only at the proper
speed. Some electrical devices may be damaged by
incorrect frequency and/or voltage. If engine speed
appears to be incorrect, contact your nearest autho
rized service facility.
25-HOUR BREAK-IN PERIOD
The first 25 hours of operation is the break-in period for
the generator. Properly breaking in the generator is
essential to reducing oil consumption and enhancing
engine performance. During the break-in period,
observe the following rules:
• For the first 25 hours, run the generator at varying electri
cal loads, to help set the engine piston rings properly.
ADDITIONAL INFORMATION
• Following the initial 25-hour break-in period, avoid light
electrical loads for the next 75 hours of operation. The
unit should be loaded at 50% (or more) of its capacity
during those 75 hours. Repeated light loads during
break-in period may improperly seat the piston rings,
resulting in blowby and high oil consumption.
• Check oil level frequently during the break-in period. Add
oil if needed. It is natural for the generator engine to con
sume much oil until the piston rings have seated properly.
• When the 25-hour break-in period is done, complete the
tasks recommended under 25-HOUR CHECK-UP
PERIOD.
25-HOUR CHECK-UP PERIOD
After the first 25 hours of operation have been com
pleted, contact an Authorized Service Facility for the
following maintenance. The Owner/Operator is
responsible for any changes.
Change engine crankcase oil and oil filter.
Check all fluid levels.
Check ail cooling system hoses and fittings for damage,
deterioration, looseness, etc. Check all hose clamps for
tightness and security.
Check engine for proper operation.
Inspect the diesel engine fuel system for leaks, tightness
and security of fuel fittings and hoses.
Inspect V-belts for condition and proper tension.
Inspect the exhaust system for damage, deterioration,
leaks proper operation.
Inspect the electrical system.
Inspect the installation for safety violations, compliance
with codes and standards.
FREEZING TEMPERATURE OPERATION
The engine cooling system should have been proper
ly filled with a 50-50 mixture of low silicate, ethylene
glycol base antifreeze and soft water. When adding
coolant to the radiator or to the coolant recovery bot
tle, add only the recommended 50-50 mixture. Refer
to SPECIFICATIONS section. If the recommended
50-50 mixture is added to the system consistently, the
unit adequately protect against freezing temperatures.
ATTENTION REQUIRED AFTER
SUBMERSION
If the generator has been submerged in water, it must
NOT be started and operated. Following any submer
sion in water, have an authorized Generac Service
Facility thoroughly clean and dry the generator.
OPERATING PRECAUTIONS
Never operate the generator set while the vehicle is
parked over dry leaves, dry grass or any other com
bustible substance. The generator’s exhaust system
becomes extremely hot and can cause fire if it is too
close to combustible materials.
The generator’s exhaust system gives off deadly car
bon monoxide gas. This dangerous gas, if breathed
in sufficient concentrations can cause unconscious
ness and even death. Never operate the generator
set with the vehicle inside any garage or other
enclosed area. Never operate the generator with a
leaking exhaust system. Close windows in the vicinity
of the generator exhaust outlet and take any other
steps that may be necessary to prevent exhaust
gases from entering rooms or areas occupied by peo
ple or animals.
EFFECTS OF MOISTURE AND DIRT
Keep the generator set as clean and dry as possible.
Protect the unit against excessive dust, dirt, corrosive
vapors, road splash, etc. Permitting dirt and moisture
to accumulate on generator windings will have an
adverse affect on the insulation resistance of those
windings.
When moisture is allowed to remain in contact with
windings, some of that moisture will be retained in
voids and cracks in the insulation. This causes a
reduced insulation resistance and will eventually
cause problems. Dirt will make the problem worse,
since dirt tends to hold moisture in contact with the
windings. Sait (as from sea air) will also worsen the
problem since it tends to absorb moisture from the air.
Salt and moisture, when combined, form a good elec
trical conductor.
— 8 —
SPECIFICATIONS
FUEL REQUIREMENTS
Recommended fuel is any high quality, automotive
type diesel fuel conforming to JIS No. 2D diesel fuel.
Keep the fuel clean.
RECOMMENDED FLUIDS
Engine Oil: Use a high quality detergent oil classified
“For Service CC or CD” Detergent oils keep the
engine cleaner and reduce carbon deposits. Use oil
having the following SAE viscosity rating, based on
the ambient temperature range anticipated before the
next oil change:
Temperature
above 100°F
40°-100°F
below 40°F SAE 5W-20 or 5W-30
Coolant: Use a mixture of half low silicate, ethylene
glycol base antifreeze and half soft water. Coolant
system capacities may vary, depending on the specif
ic installation, length of system hoses, radiator use,
etc.. Use only soft water and low silicate antifreeze.
If desired, a high quality rust inhibitor may be added
to the recommenced coolant mixture. When adding
coolant, always add the recommended 50-50 mixture.
CAUTION! Do not use any chromate base rust
inhibitor with ethylene glycol base antifreeze or
chromium hydroxide (“green slime”) forms and
causes overheating. You must chemically clean
engines that have operated with a chromate base
inhibitor before adding ethylene glycol base
antifreeze. Using any high silicate antifreeze
boosters or additives will also cause overheating.
In addition, using any soluble oil inhibitor is not
recommended for this equipment.
Oil Grade (recommended)
SAE 40
SAE 10W-30 or SAE 30
GENERATOR SPECIFICATIONS
Model....................................................................NP-75D
Model Number........................................................9344-2
Rated Maximum Continuous
AC Power Output
Rated Voltage
Rated Maximum Continuous
Current
at 120 volts...........................62.5 AC amperes
at 240 volts.............................31.2 AC amperes
Phase
...................................................................1 Phase
Rated AC Frequency
Power Factor................................................................1.0
Number of Rotor Poles....................................................4
Rotor Speed at No-Load
.............................
.......................................
.........................
....................................
7500 watts (7.5 kW)
120/240 volts AC
60 Hz. at 1800 rpm
1860 rpm
ENGINE SPECIFICATIONS
Type of Engine
Cooling Method
Displacement
Combustion Chamber
Cylinders and Arrangement
Bore
............................................
Stroke
..............................................
Compression Ratio
No. of Main Bearings
Break Mean
Effective Pressure .......................
.............................
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4-cycle diesel
Water-cooled
58.2 inches (954cc)
Swirl Type
3
...2.95 inches (75cc)
2.83 inches (72cc)
23 to 1
5
97
— 9 —
MAINTENANCE
PERIODIC MAINTENANCE SCHEDULE
* Performed by Authorized Service Facility
** Performed by Owner/Operator
A. After the first 25 Operating Hours*
1. Change oil and oil filter.
2. Check engine coolant level.
3. Inspect cooling system,
4. Check engine operation.
5. Inspect drive belts.
6. Inspect exhaust system.
7. Inspect electrical system.
8. Inspect battery.
9. Check governed speed setting.
10. Check engine valve clearance.
11. Inspect air cleaner/flame arrestor.
12. Clean the generator.
B. Every 8 Hours of Operation**
1. Check coolant level in coolant recovery bottle.
2. Check fuel level.
3. Check engine oil level.
C. Once Each Week**______________________
1. Inspect the generator set.
2. Inspect the generator battery.
D. Every 100 Hours or Once Each Month**
(whichever comes first)
1. Inspect cooling system.
2. Inspect exhaust system.
E. Every 6 Months or Every 250 Operating Hours*
(whichever comes first)
1. Change engine oil and filter.
2. Check engine operation.
3. Inspect drive belts.
4. Inspect electrical system.
5. Inspect and check battery.
6. Check engine governor setting.
7. Clean or replace fuel filters.
8. Inspect air cleaner/flame arrestor.
9. Clean the generator.
10. Check cooling system and coolant level.
11. Inspect exhaust system.
12. Inspect fuel system.
F. Once Annually or Every 500 Operating Hours*
(whichever comes first)
1. Check engine valve clearance.
2. Check Engine compression and condition.
3. Check fuel injection timing.
4. Check-test fuel injection nozzles.
G. Once Every Two Years*
1. Drain, flush and refill cooling system.
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OVERLOAD PROTECTION FOR
ENGINE DC ELECTRICAL SYSTEM
Engine cranking, start up and running are controlled
by a solid state engine controller circuit board.
Battery voltage is delivered to that circuit board via 10
amp circuit breaker and 14 amp in-line fuse. These
overcurrent protection devices will open if circuit is
overloaded.
CAUTION! If a circuit breaker opens or a
fuse element melts, you should find the
cause of the overload before resetting the
circuit breaker or replacing the fuse.
10 AMP CIRCUIT BREAKER
If the circuit breaker opens due to an overload, you
cannot crank or start the engine. The circuit breaker
is a “push-to-reset” type. For emergency shutdown,
pull the circuit breaker open. Also see “Generator
Control Panel” on Page 5.
14 AMP FUSE
If the fuse element melts open, you cannot crank or
start the engine. If you must replace the fuse, use
only identical 14 amp fuse (Figure 9).
30 AMP FUSE
The generator set battery is charged during operation
by a DC alternator, driven by the engine. This 30
amp fuse protects the charging circuit against over
load. Should you need to replace the fuse, use only
an identical 30 amp fuse (Figure 10).
Figure 9 — 14 Amp Fuse
STARTING ENGINE
CIRGUIT CONTROLLER
1 O AMP 14 AMP
Figure 10 — 30 Amp Fuse for Battery Charge Circuit
BATTERY
CHARGING PRE—HEAT
30 AMP 30 SEC. MAX
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