VDO Dayton 4W315C User Manual

Operating Instructions & Parts Manual

Version B - For Reduction G016.J

Please read and save these instructions. Read carefully before attempting to assemble, install, operate or maintain the product described.
Protect yourself and others by observing all safety information. Failure to comply with instructions could result in personal injury and/or
property damage! Retain instructions for future reference.

®

4W315C

Dayton Diesel Electric
Generator

Description

Dayton professional-duty generators are rugged and compact. These models provide
dependable, trouble-free service. The alternators are brushless with revolving fields.
Yanmar diesel engines provide long life under heavy use. These engines are governed to
maintain engine speed of 3600 RPM under load. 3600 RPM engine speed provides 120/
240V, 60 Hz power. Additional features include circuit breaker protection, spark-arresting
muffler, large fuel tank, oil alert system, electric starter, and a pressurized lubrication
system.

Unpacking

1. Remove generator from carton.

2. Remove any protective packaging
applied to generator for shipment.

3. Check for loose or missing parts. Check
for shipping damage. If any parts are
missing or damaged, promptly inform
dealer where you bought generator.

4. Battery cables are supplied. These cables
are in a separate bag inside generator
carton. You must install these cables to
engine. See “Battery,” page 7 for
installation instructions.

Figure 1 – Model 4W315C

Form 5S3125

®

Printed in U.S.A.
03430
0703/215/VCPVP

Dayton Operating Instructions and Parts Manual

®

Dayton Diesel Electric Generator

Specifications

ELECTRICAL SPECIFICATIONS

Rated Maximum Rated Amperage Rated Amperage
Wattage* VA 120V 240V

5000 6500 41.7 20.8

4W315C

* Single-phase, 1.0 power factor
NOTE: Ratings apply to SAE standard conditions. Reduce ratings 3
Fahrenheit rise above 60°F.

GENERAL SPECIFICATIONS

Yanmar Yanmar Fuel Fuel Tank Oil Alert Electric Weight
Engine H.P. Model Type Capacity System Start (pounds)

10 L100 Diesel 4.2 gal. Yes Yes 241

RECEPTACLE SPECIFICATIONS

120V 120V, 30-Amp 120/240V, 20-Amp 120V Full
Duplex Twist-Lock Twist-Lock Power Switch

Yes Yes Yes Yes

ELECTRICAL COMPONENT SPECIFICATIONS

Resistance in Ohms
Stator Stator Rotor Rotor Capacitor,
Main Auxiliary Primary Secondary MFD Diodes (2)
Winding * Winding ∆ Winding † Winding † 450 Volt 800 Volt

0.54 1.38 0.61 2.29 50 70 Amp

1

/2% for each 1000 feet above sea level and 1% for each 10°

(*) Connect T2 (green) and T3 (black). Measure resistance between T1 (red) and T4 (yellow).
(∆) Resistance between brown and white leads.
(†) Remove diodes to check resistance.

2

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Dayton Operating Instructions and Parts Manual

Version B - For Reduction G016.J

Model 4W315C

Product Identification

Full Power
Selector Switch

Control Panel

1
2

0
V

O
L

T
S

F
U

L
L

P

1

O

2

0

W

O

E

N

R

L

Y

S
E
L

E
C

T

1

O

2

R

0
/
2

4
0

V

1

0

2

1

0

0

/

2

0

4

0

2

V

0

O

0

L

T
S

A

3

C

0

V

O
L
T

S

O
U

T
P

U
T

V

O

L
T
A

G
E

120 Volt
Receptacles

Hour Meter

F

E

Roll Cage

N
U
R

P

O
T
S

Engine Run Lever

Engine Stop Lever

120/240 Volt
Receptacle

Circuit
Breaker

Figure 2 – Portable Generator

Starter Grip

Battery Discharge Lamp

Electric Start Switch

Decompression
Lever

Engine

Alternator

Oil Alert Lamp

Fuel Valve (under fuel tank)

EF

Fuel Gage

Oil Dipstick

Fuel Cap

Muffler

Fuel Tank

Ground
Lug

Spark
Arrester

Battery (Not
included, must
be purchased
separately)

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Dayton Operating Instructions and Parts Manual

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Dayton Diesel Electric Generator

4W315C

General Safety Information

IMPORTANT: Read these instructions and

engine owner’s manual carefully. Become
familiar with generator before trying to
operate or service it. Know its uses,
limitations, and any hazards involved.
Improper use of generator can cause
severe injury or death from explosion, fire,
burns, electrical shock, or carbon monox­ide poisoning.

Make certain you read and understand all
warnings. Keep these instructions for
reference. They are your guide to safe and
proper operation of this generator.

Safety information appears throughout
these instructions. Pay close attention to
them. Below are definitions for the safety
information listed throughout this manual.

Under this heading,

installation, operat­ing, and maintenance procedures or
practices will be found that, if not carefully
followed, WILL result in IMMEDIATE
serious personal injury or death.

Under this heading,

installation, operat­ing, and maintenance procedures or
practices will be found that, if not carefully
followed, COULD result in severe personal
injury or death.

Under this heading,

installation, operat­ing, and maintenance procedures or
practices will be found that, if not carefully
followed, MAY result in minor personal
injury, product or property damage.

Engine exhaust

contains poisonous
carbon monoxide gas. Overexposure
will cause loss of consciousness and
will lead to death. Use only in well­vented areas. Make sure area has
plenty of free-moving, fresh, outside
air. Never run generator in an enclosed
or confined area. Never run generator
inside occupied building.

Early signs of carbon monoxide
poisoning resemble the flu, with
headaches, dizziness, or nausea. If you
have these signs, get fresh air at once!
Some people are more affected by
carbon monoxide than others. These
include pregnant women, persons with
heart or lung disease or anemia, those
under the influence of alcohol, and
those at high altitudes.

Diesel fuel pre-

sents a hazard of
fire. Diesel fuel is flammable.

• Keep fuel out of children’s reach.

• Refuel generator in a well-vented

area. Do not fill fuel tank in the dark.
Do not refuel while engine is
running. Unhook all electrical loads
and shut off engine before refueling.

• Do not overfill fuel tank. Always

allow room for fuel to expand. If you
overfill tank, fuel can overflow onto
hot generator. This can cause fire.
After refueling, tightly close fuel
tank cap.

• Do not spill fuel. If fuel spills, make

sure area is dry before starting
engine.

• Never smoke in refueling area. Never

allow open flames or sparks in area.

• Store fuel in approved container.

Store fuel in a well-vented area free
of open flames or sparks.

Guard against fire

hazard. Keep
operation area well-vented. Keep
generator at least three feet away
from any object. Do not place flam­mable objects near generator.

• Do not use generator where flam-

mable vapors are present. Some
vapors are heavier than air. These
vapors settle in low-lying places.

• Do not use generator in enclosed

spaces. This includes motor home or
RV generator compartments.

Guard against

electric shock.
Generator produces high voltage. This
high voltage can cause severe electric
shock. Only responsible adults should
use the generator.

•Properly ground generator before

starting.

• Never let anyone operate or service

generator without proper instruc­tions.

•Avoid contact with live terminals or

bare wires.

• Do not use generator outdoors in

rain or snow.

• Do not use generator near standing

water or snow.

• Do not use if generator is wet or

damp.

• Do not use generator in highly

conductive areas. These areas include
metal decking and steelwork.

• Only use grounded extension cords.

• Do not use any worn or damaged

electric cords. Electric shock or
damage to generator may result.

• On construction sites, you must use a

Ground Fault Circuit Interrupter
(GFCI). This helps guard against
electric shock. OSHA and the Na­tional Electrical Code requires this.

• Do not wear damp clothing or wet

shoes when using generator.

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Dayton Operating Instructions and Parts Manual

Version B - For Reduction G016.J

Model 4W315C

General Safety Information
(Continued)

Guard against

burns. Hot engine
parts can cause severe injury. Use
caution and remain alert when using
generator.

• Keep children and animals away

from generator while it is running or
hot.

• Keep all covers and shields in place.

Keep them tightly secured.

• The muffler becomes very hot during

operation. The muffler remains hot
for a while after shutdown. Do not
touch muffler while it is hot. Do not
let muffler touch anything flam­mable. Let engine cool before
transporting or storing.

Have standby

installation to
home or building performed by a
licensed electrician. Do not let anyone
else wire into a utility circuit. Personal
injury, equipment damage, or damage
to home could occur.

Battery contains

sulfuric acid.
Battery acid is poisonous if swallowed.
Contact with skin or eyes may cause
severe burns. Do not tilt generator
with battery installed. Tilting could
cause battery acid to spill. Wear
protective clothing and face shield
when servicing. Keep out of children’s
reach.

Only a qualified

electrical service
person should service and repair
generator.

• Generator produces high voltage.

Use extreme caution when working
on electrical parts.

• When working on generator, avoid

hot muffler, exhaust manifold, and
engine parts. Severe burns may
occur.

• Do not work on generator when

tired.

• Use only factory approved replace-

ment parts.

Keep generator
and nearby areas

clean.

• Keep generator free of oil, mud, and
other foreign matter.

• Remove anything that creates
slippery areas around generator.

• Remove oily rags and other items
that create fire hazards.

• Keep a fire extinguisher nearby.
Make sure it is rated ABC by the
NFPA. They are good for all uses.
Consult your local fire department.

• Keep fire extinguisher well main­tained. Be familiar with its use.

Know how to stop
engine quickly.

Know how to use all controls.

Prolonged expo­sure to loud noise

can cause hearing loss.

• When working around generator,
wear approved hearing protection.

• Remember neighbors when using
generator.

existing electrical circuits. The genera­tor output will back-feed into the
utility power line. This may electrocute
a power company line repair person.
Also, if generator is powering electri­cal circuits, the chance of an electrical
fire exists.

Keep sparks, flames, and cigarettes
away. Do not remove or install battery
cables when engine is cranking or
running. Only service or use battery in
a well-vented area.

107358

Never connect
generator to any

Battery gives off
explosive gases.

Store generator in

a well-vented area.
Make sure fuel tank is empty. Never
store with fuel in tank.

Never operate

generator

• if engine speed changes greatly

• if engine misfires often

• if powered items overheat

• if electrical output drops

• if it is sparking

• if it produces smoke or flames

• if it vibrates at high levels

• if it has a damaged receptacle

5

Generator Features

OIL ALERT SYSTEM

The oil alert system protects the engine
from low oil damage. This system auto­matically shuts down the engine and
prevents engine restarting if the oil
pressure falls too low.

If this system shuts down the engine, the
engine will not start until you add oil. The
oil alert lamp is near engine starter switch
(See Figure 3, page 6). Add oil to engine
(See “Engine Oil,” page 8).

See engine owner’s manual for more
information.

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Dayton Operating Instructions and Parts Manual

®

Dayton Diesel Electric Generator

4W315C

Generator Features
(Continued)

OIL

CHARGE

OFF

Battery
Discharge
Lamp

Figure 3 - Battery Discharge Lamp and Oil
Alert Lamp Location

BATTERY DISCHARGE LAMP

The battery discharge lamp (See Figure 3,
above) will light if battery charger is not
operating while engine is running. If this
happens, the battery will not charge and
will eventually run down. Have battery
charging circuit repaired by authorized
service person.

FULL POWER SELECTOR SWITCH

The full power selector switch is on the
control panel. The switch has two posi­tions: 120 VOLT ONLY, and 120/240 VOLT.

120 VOLT ONLY: This position sends full
power to the 120V receptacles only. 240V
power is not available. Use this position
when powering 120V items only.

Figure 4 – Full Power Selector Switch in 120
Volt Only Position

Oil Alert
Lamp

120/240 VOLT: This position sends full
power to the 120/240V receptacle. It also
powers the 120V receptacles at reduced
wattage capacity.

Figure 5 – Full Power Selector Switch in
120/240 Volt Position

IMPORTANT: Do not move the full power
selector switch while powering electrical
items. Unplug all items before moving
switch. Failure to do so can damage switch.

HOUR METER

The hour meter will measure the total run
time of the generator, including all idle
time. Hour meter is accurate up to 1/10 of
an hour.

Figure 6 – Hour Meter

ELECTRIC START

A battery is not supplied with generator.
You must provide a 12-volt, 45-amp-hour
battery. For more battery information, see
“Battery,” page 7.

GROUND FAULT CIRCUIT INTERRUPTER
RECEPTACLE

This generator has a 120-volt ground fault
circuit interrupter (GFCI) receptacle. The
GFCI receptacle is on the control panel.
The GFCI protects you against hazardous

electrical shock caused when your body
becomes a path through which electricity
travels to reach ground. This could happen
when you touch an appliance or cord that
is ‘live’ through faulty mechanism, damp
or worn insulation, etc.

When protected by the GFCI, you may still
feel a shock, but the GFCI should cut it off
quickly. A person in normal health should
not receive serious injury.

NOTE: Infants and very small children may
still be affected.

TEST PROCEDURE
Check the GFCI receptacle every month.

This insures it is working right.

1. Push black TEST button. Red RESET
button should pop out. This should
trip GFCI, resulting in no electrical
power at receptacle. Verify this by
plugging test lamp with good bulb
into receptacle. If lamp does not work,
GFCI receptacle is good.

If RESET button

does not pop out,
do not use the GFCI receptacle. Contact
a qualified electrician for repairs.

2. If the GFCI receptacle tests okay, restore

power by pushing the RESET button
back in. The test lamp should work at
this time.

IMPORTANT: You
must press the RESET
button firmly and fully.
It should lock into
place. If the GFCI does

RESET

TEST

not lock into place, do
not use receptacle.
Contact a qualified
electrician for repairs.

Figure 7 – GFCI Receptacle

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Dayton Operating Instructions and Parts Manual

Version B - For Reduction G016.J

Model 4W315C

Generator Features
(Continued)

RECEPTACLE CIRCUIT BREAKER

The circuit breakers protect the receptacles
and alternator. Overloading generator will
trip circuit breaker. A short circuit in item
being powered will also trip breaker. If this
occurs, unplug electrical load from
receptacle. Let circuit breaker cool down.
Push circuit breaker button to reset.

Electric motors need higher starting
current. They require up to 3-times their
rated wattage to start. The starting current
needed may be too high. This can cause
nuisance circuit breaker tripping. To help
prevent this, start electric motors first.
Connect additional items to generator
after starting motors. If this continues to
happen, reduce the total generator load.

20

Figure 8 – Receptacle Circuit Breaker Button

SPARK ARRESTER

We ship a spark arrester with this genera­tor. You must install spark arrester to
muffler (See Figure 9).

A spark arrester is required if using
generator in a national forest and other
designated state and local areas. Check
local codes.

The spark arrester needs periodic cleaning.
A dirty spark arrester reduces engine
output and increases fuel consumption. It
also makes starting difficult. See engine
owner’s manual for cleaning instructions.

20

TrippedNormal

Muffler

Clamp

Figure 9 - Installing Spark Arrester

Spark
Arrester

Assembly

BATTERY

Battery gives off

explosive gases.
Keep sparks, flames, and cigarettes
away. Do not remove or install battery
cables when engine is cranking or
running. Only service or use battery in
a well-vented area.

Battery contains

Contact with skin or eyes may cause
severe burns. Do not tilt generator with
battery installed. Tilting could cause
battery acid to spill. Wear protective
clothing and face shield when servicing.
Keep out of children’s reach.

• If battery acid gets on your skin,

wash with water.

• If battery acid gets in your eyes,

flush with water at least 15 minutes.
Call a doctor at once.

Battery acid is poisonous.

• If swallowed, drink large amounts of

water or milk. Follow with milk
of magnesia or vegetable oil. Call a
doctor at once.

the red, positive (+) battery cable
terminal. Insulate with electrical tape.
Exposed terminal may spark when
generator runs.

sulfuric acid.

If you remove

battery, insulate

IMPORTANT: Make sure battery connec-
tions are the correct polarity. Electric start
generators use negative ground, 12-volt
DC starting system.

A battery is not supplied with generator. You
must provide a 12-volt, 45-amp-hour
battery. The positive and negative battery
cables are supplied with generator. You must
install these cables before mounting battery.

Always wear safety glasses when working
with battery. Make sure battery terminals are
clean. Make sure cable connections are tight.

Always shut down engine before removing
or attaching battery cables. Always remove
the negative (–) cable first. Always attach
negative (–) cable last.

INSTALLING BATTERY CABLES TO
ENGINE

1. Attach the red, positive (+) battery cable
to the starter solenoid on engine (See
Figure 10).

Starter
Solenoid

Red, Positive (+)
Battery Cable

Figure 10 – Connecting Red, Positive (+)
Battery Cable to Starter Solenoid on Engine

2. Attach the black, negative (–) battery
cable to the engine block. Use the bolt,
nut, and two washers provided with the
battery cables. Attach cable as shown in
Figure 11, page 8.

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Dayton Operating Instructions and Parts Manual

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Dayton Diesel Electric Generator

4W315C

Assembly (Continued)

Black, Negative (–)
Battery Cable

Figure 11 – Connecting Black, Negative (–)
Battery Cable to Engine Block

MOUNTING BATTERY TO GENERATOR

1. Secure battery to generator by battery
hold-down system. This system consists
of the battery mounting bracket, hook
bolt, and nut (See Figure 12).

Battery Mounting
Bracket

Battery

Figure 12 – Battery Hold-Down System

Nut

Hook Bolt

2. Locate the red, positive (+) battery cable
from starter solenoid. Connect it to the
positive (+) battery terminal (See Figure

13).

3. Locate the black, negative (–) battery
cable attached to engine block. Connect
it to the negative (–) battery terminal
(See Figure 13).

4. Check battery before starting engine.
Make sure fluid levels are full. Make
sure battery is charged.

See engine owner’s manual for more
information.

Red, Positive Cable
From Starter Solenoid

Black, Negative
Cable From
Engine Block

Figure 13 – Connecting Positive and
Negative Cables to Battery

Installation

FUEL

Diesel fuel pre-

fire. Diesel fuel is flammable.

• Keep fuel out of children’s reach.

• Refuel generator in a well-vented
area. Do not fill fuel tank in the dark.
Do not refuel while engine is
running. Unhook all electrical loads
and shut off engine before refueling.

sents a hazard of

• Do not overfill fuel tank. Always
allow room for fuel to expand. If you
overfill tank, fuel can overflow onto
hot engine. This can cause fire. After
refueling, tightly close fuel tank cap.

• Do not spill fuel. If fuel spills, make
sure area is dry before starting
engine.

• Never smoke in refueling area. Never
allow open flames or sparks in area.

• Store fuel in approved container.
Store fuel in a well-vented area free
of open flames or sparks.

Use clean, fresh, diesel fuel. Use diesel fuel
with cetane rating of 45 or higher. Avoid
getting dirt, dust, or water in fuel tank.
See engine owner’s manual for more
information.

ENGINE OIL

We ship the generator without oil in the
engine crankcase. You must add oil before
starting engine. See “Engine Lube Oil,”
page 9 for specific oil type.

CHECKING OIL LEVEL AND ADDING OIL

Follow steps below to check oil level.
Make sure engine is level and stopped.

1. Remove dipstick (See Figure 14). Wipe
dipstick clean.

2. Insert dipstick into oil filler neck. Do not
screw it in. Oil level should be at top of
filler neck. Oil should cover most of
dipstick.

3. If level is low, fill to top of oil filler neck
(See Figure 14). Use proper lube oil to
preserve your engine.

NOTE: If oil level is too low, oil alert
system will shutdown engine and prevent
engine from restarting.

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Model 4W315C

Installation (Continued)

Oil Level
At Top Of
Filler Neck

Dipstick

Oil

Figure 14 – Checking Oil Level

ENGINE LUBE OIL

Nothing affects the performance and
durability of your engine more than the
lube oil you use. Using inferior oil or not
changing oil regularly increases the risk of
piston seizure, piston ring sticking, and
accelerated wear of cylinder liner, bearing
and other moving parts. Your engine life
may be seriously shortened. Yanmar
recommends CC/CD oil of API engine
service classification, stock number 4ZF20.

Always use oil with the right viscosity for
the ambient temperature in which you are
using the engine. Use the chart below
when choosing your engine oil.

Lube Oil Capacity:
4W315C1.74 qt.

107358

20W 40

10W 30

VENTILATION

Use only in well-

vented areas. Make
sure area has plenty of free-moving,
fresh, outside air. Never run generator
in an enclosed or confined area. Never
run generator inside occupied building.
Engine exhaust contains poisonous
carbon monoxide gas. Overexposure
will cause loss of consciousness and
will lead to death.

This generator needs cooling air to run
properly. Never block free-flowing, cooling
air to generator. Overheating will occur
without cooling air. This will damage the
generator. Keep generator at least three
feet away from any object.

GENERATOR GROUNDING

You must properly

earth-ground
generator before starting. This will
help guard against deadly electric
shock. Only use grounded plugs with
generator. Only use grounded exten­sion cords. Only use three-wire or
double-insulated power tools.

Grounding generator helps prevent electric
shock from a ground fault condition.

Locate ground lug on end of generator
housing (See Figure 15). Attach a #10
stranded-copper ground wire to ground
lug. Drive grounding point into ground.
Grounding point can be a stake, ground­ing rod, or pipe. Grounding point should
be copper or brass. Attach ground wire to
grounding point. You must supply the
ground wire and grounding point. They do
not come with generator. Follow the
National Electrical Code and all state and
local codes. Consult your power company
or a licensed electrician.

Ground Lug

Copper or
Brass
Grounding
Point

Alternator

Figure 15 – Grounding Generator

metal pipe being used to carry combus­tible materials or gases.

Ground Wire

For a grounding
point, do not use

DUST, DIRT, RAIN, AND SNOW

Do not use genera-

tor outdoors in
rain or snow. Do not use generator
near standing water or snow. Do not
use if generator is wet or damp.
Operating generator in these condi­tions increases the risk of electrocu­tion. Severe injury or death can occur.

Do not use generator in extremely dusty or
dirty conditions. This will severely affect its
life. Keep generator clean. Do not allow

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Dayton Operating Instructions and Parts Manual

®

Dayton Diesel Electric Generator

4W315C

Installation (Continued)

dust, dirt, rain, or snow to collect on it.
Protect generator from outdoor elements.

EXTENSION CORDS

Only use grounded extension cords. Be sure
to use extension cord with proper wire
gauge size. See chart below.

RECOMMENDED MINIMUM WIRE
GAUGES (AWG) FOR EXTENSION CORDS

Ampere AWG for AWG for AWG for
Load 50' Cord 100' Cord 150' Cord

218 18 18
318 18 18
416 16 16
516 16 16
616 16 14

816 14 12
10 16 14 12
12 14 14 12
14 14 12 10
16 12 12 10
20 10 10 8

GROUND FAULT PROTECTION

Ground Fault Circuit Interrupter (GFCI)
helps guard against electric shock. On
construction sites, you must use a GFCI.
OSHA and the National Electric Code
requires this.

STANDBY INSTALLATION TO HOME OR
BUILDING

Have standby

installation
performed by a skilled, licensed
electrician. Do not let anyone else wire
into a utility circuit. Personal injury,
equipment damage, or damage to
home could occur.

IMPORTANT: This generator will not
power your entire home. Most home
utility electric service is more than 60
amps. This will exceed generator output.
Only power needed items during a power
outage. Make sure total wattage of
electrical load does not exceed rated
wattage of generator.

You can use this generator as a standby
power source. During a power outage, the
generator will power selected items in a
building. Have generator and additional
wiring installed by a skilled, licensed
electrician. This is not a do-it-yourself job.
Follow all local codes.

The electrician must install a double­throw transfer switch. This isolates
existing electrical circuits from the
utility power line. If not isolated,

generator output
will back-feed into

utility power line.
This may electrocute a power company
line repair person.

DETERMINING ELECTRICAL LOAD FOR
GENERATOR

You must decide what electrical load your
generator can power. Do this before using
generator. Use the following four-step
method. It will help you select a load that
is not too large. Make sure total wattage
of all electrical loads does not exceed
5000 watts. Electric motors present a
special problem when figuring load. Read
Step 3 carefully.

1. Make two lists of items you want

powered by generator. List all motors
and motor powered appliances in one.
List all lights, small appliances, etc. in
the other. For standby service to home
or building, only include items you must
power.

2. Enter running watts of each item except
motors. The light bulb or appliance
nameplate lists its wattage. Remember,
1KW = 1000 watts.

NOTE: The nameplate may not list
wattage. It may only list volts and amps.
The formula for finding wattage is: Volts x
Amps = Watts. For example: An appliance
nameplate states 3 amps at 120 volts. 3
amps x 120 volts = 360 watts.

3. Electric motors present a special
problem. They require 3 to 6 times their
rated full-load wattage to start. Chart 2,
page 11, shows starting watts (maxi­mum volt-amperes [VA]) for different
size motors. For example: an electric
motor nameplate states 5 amps at 120
volts. 5 amps x 120 volts = 600 watts
running. Multiply this figure by 3. This
will show the starting watts (maximum
VA) needed. 600 watts x 3 = 1800
watts (VA) to start. When figuring the
generator load for motors, you must use
the starting watts (maximum VA) figure.
Do not use the running watts figure.

NOTE: Some motors require nearly the
same wattage to run as to start. These
items include saws, drills, hair dryers, and
food mixers. See Chart 1, page 11 for
typical appliance wattage examples.

4. Add watts and starting watts (maximum
VA) of all items. This total must not be
larger than 5000 watts. It is a good idea
to have up to 25% extra capacity for
future needs or extra equipment.

10

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Dayton Operating Instructions and Parts Manual

Version B - For Reduction G016.J

Model 4W315C

Installation (Continued)

TYPICAL ELECTRIC APPLIANCE WATTAGES

Chart to be used as a reference. Data may vary with size, make, and/or model.

CHART 1

Equipment Watts (Max.VA)

Running Watts

Light bulb (100W) 100 100
Radio 150 150
Fan 200 600
Television 400 400
Furnace fan—1/3 HP with blower 600 1800-2400
Vacuum cleaner 600 750
Sump pump—1/3 HP 700 2100-2800
Refrigerator/freezer 800 2400-5000
6" Circular saw 800 1000
Floodlight 1000 1000
1/2" Drill 1000 1250
Toaster/coffeemaker 1200 1200
Skillet 1200 1200
14" Chain saw 1200 1500
Water well pump—1/2 HP 1000 3000-6000
Hot plate/range (per burner) 1500 1500
10" Table saw 2000 6000
Water heater (storage-type) 5000 5000

Starting

CHART 2

Motor Approximate (Max. VA) (Max. VA) (Max. VA) (Max. VA)
HP Running Universal Motors Repulsion Capacitor Split Phase
Rating Watts (small appliance) Induction Motors Motors Motors

1/8 500 625 1100 1500 2250
1/4 700 875 1550 2100 3150
1/3 800 1000 1750 2400 3600
1/2 1100 1375 2400 3300 4950
3/4 1400 1750 3100 4200 †
1 1700 2125 3750 5100 †
1
2 2450 3075 5400 7350 †
3 3600 † 7800 10800 †

(*) Always use starting watts (maximum VA), not running watts, when figuring correct electrical load.
(†) Motors of higher horsepower are not generally used.
NOTE: Please check with appliance manufacturer for maximum wattage required.

107358

Approximate Approximate Approximate Approximate
Starting Watts* Starting Watts* Starting Watts* Starting Watts*

1

/2 2100 2625 4620 6300 †

11

®

Dayton Operating Instructions and Parts Manual

®

Dayton Diesel Electric Generator

4W315C

Operation

HIGH AND LOW TEMPERATURE
OPERATION

Air temperature affects generator output.
Output drops 1% for each 10° tempera­ture rise above 60° F. Very low tempera­tures may make the engine hard to start.
See engine owner’s manual for more
information.

GENERAL INFORMATION

This generator is not large enough to
power your entire home. Do not connect
generator to any existing electrical circuits.
Plug items directly into generator recep­tacles. Do not exceed amperage rating of
receptacles. Only use grounded cords.

Use only in well-

vented areas. Make
sure area has plenty of free-moving,
fresh, outside air. Never run generator
in an enclosed or confined area. Never
run generator inside occupied building.
engine exhaust contains poisonous
carbon monoxide gas. Overexposure
will cause loss of consciousness and
will lead to death.

Never connect

generator to any
existing electrical circuits. The genera­tor output will back-feed into the
utility power line. This may electrocute
a power company line repair person.
Also, if generator is powering electri­cal circuits, the chance of an electrical
fire exists.

NOTE: We supply the engine owner’s
manual with generator. Refer to that
manual for questions concerning engine
operation.

USING RECEPTACLE

NOTE: Do not exceed amperage rating of
receptacles. Exceeding rating will trip
receptacle circuit breaker.

Use receptacles properly. Improper use
could damage generator. Use only
grounded extension cords. Power only
grounded or double-insulated items. Do
not overload receptacles. These genera­tors have the following receptacles (See
Figure 16):

• 120V, 15-amp duplex receptacle

• 120V, 15-amp GFCI duplex receptacle

• 120V, 30-amp twist-lock receptacle

• 120/240V, 20-amp twist-lock recep­tacle

120V, 15-Amp GFCIDuplex

120V, 15-Amp Duplex

1

2

0

V

O

L

T

S

R

E

S

E

T

T

E

S

T

120

ONLY

120
240V

EN

M

0

000

000

HOURS 1/10

5

120V, 30-Amp
Twist-Lock

120/240V, 20-Amp
Twist-Lock

Figure 16 – Receptacle Locations

POWER CORD AND PLUG REQUIRE­MENTS

120V, 30-amp twist-lock receptacle

• NEMA L5-30P plug

• Three-wire, 30-amp cord

120/240V, 20-amp twist-lock receptacle

• NEMA L14-20P (20-amp) plug

• Four-wire, 20-amp cord

120 Volt

30 Amp

W

Ground
(Green)

(Neutral)

120/240 Volt

20 Amp

Ground
(Green)

W

Y

(Hot)

X

(Hot)

X

(Hot)

W

(Neutral)

G

Neutral

120V 120V

w

YX

G

Ground

Figure 17 – Cord and Plug Configurations

PRESTART

Operate generator on a firm, dry, and
clean surface. The surface must be level.
Protect generator from heavy dust, sand,

RES

ET

dirt, rain, or snow. Do not locate genera-

R

ES

ET

tor near standing water or snow. Make
sure area is well-vented.

Only responsible

adults should use
generator. Never let anyone operate
generator without proper instructions.

NOTE: If oil level is too low, oil alert
system will keep engine from starting (See
“Oil Alert System,” page 5). Make sure oil
level is full before starting. See Engine Oil,
page 8.

Before starting the engine, disconnect all
electric loads from generator.

You may need to bleed fuel line to remove
trapped air

• if starting engine for first time

• if starting engine after allowing
generator to run out of fuel

X

L5-30P
Plug

L14-20P
Plug

12

107358

Dayton Operating Instructions and Parts Manual

Version B - For Reduction G016.J

Model 4W315C

Operation (Continued)

BLEEDING FUEL LINE

1. Loosen fuel line clamp and remove fuel
line from engine. Place open end of fuel
line over a clean container to catch any
fuel spilled in step 3, below.

2. Move fuel valve lever to the “O” (open)
position (See Figure 18).

3. Allow air to bleed from line. When fuel
exits fuel line in a steady stream,
reattach fuel line to engine.

4. Add spilled fuel back into fuel tank.

STARTING

Never use gaso-

line, paint thinner,
or any other flammable liquid as a
starting aid. An explosion may occur.

IMPORTANT: The engine speed is preset.
The throttle is locked in preset position. Do
not adjust throttle. Preset position lets
engine run at 3600 RPM under load. The
engine must maintain 3600 RPM for
generator to create correct voltage.
Running engine at lower speeds will
damage generator and powered items.

IMPORTANT: Never start generator with
electrical loads connected. Start engine
before adding electrical loads.

1. Make sure fuel tank is full. See “Fuel,”

page 8 for fuel information.

2. Move fuel valve lever to the “O” (open)

position (See Figure 18).

O

S

Fuel Valve
Lever

Figure 18 - Fuel Valve Lever In “O” (open)
Position

3. Move engine run lever to the RUN
position (See Figure 19).

Engine Run
Lever

RUN

STOP

Figure 19 - Engine Run Lever

You must fully

move engine run/
stop knob to the RUN position to run
engine at 3600 RPM. Do not run engine
at lower speeds. Running engine at
lower speeds will damage generator
and powered items.

4. Start the engine.

a. Electric Starter

(1) Slowly pull starter rope until you

feel strong resistance. Gently
return starter rope to engine.

(2) Push decompression lever all the

way down (See Figure 20). Decom­pression lever will stay in this
position until you turn starting key.

Decompression
Lever

Figure 20 - Decompression Lever

(3) Turn the starting key clockwise to

the START position (See Figure 21).
Hold it there until engine starts.

Starting Key

OIL

CHARGE

OFF

Figure 21 - Starting Key

(4) When engine starts, release key.

IMPORTANT: Do not use electric starter
more than ten seconds. Starter motor
damage may occur. If engine fails to start,
release the key and wait 15 seconds. After
15 seconds, try starting again.

107358

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13

Dayton Operating Instructions and Parts Manual

RUN

STOP

®

Dayton Diesel Electric Generator

4W315C

Operation (continued)

b. Recoil Starter

(1) Slowly pull starter rope until you

feel strong resistance. Gently
return starter rope to engine.

(2) Push decompression lever all the

way down (See Figure 22). Decom­pression lever will stay in this posi­tion until you pull starter rope.

Decompression
Lever

Figure 22- Decompression Lever

(3) Firmly grasp starter grip with both

hands. Remove slack from starter
rope by lightly pulling starter grip.

(4) To start engine, pull starter rope

briskly. You must pull the starter
rope all the way out. If not, the
engine will not start.

IMPORTANT: Do not let starter grip snap
back against engine. Return it gently. This
will prevent damage to starter.

Never use gaso-

line, paint thinner,
or any other flammable liquid as a
starting aid. An explosion may occur.

If engine does not start, repeat steps
under b. Recoil Starter on this page.

HIGH ALTITUDE OPERATION

This generator will not perform well at
high altitudes without proper adjust­ment. Contact a Yanmar dealer for
adjustment information.

ADDING ELECTRICAL LOADS

IMPORTANT: Do not overload generator.
Make sure total wattage of all electrical
loads does not exceed rated wattage of
generator. Overloading may shorten
generator life. It could also cause internal
damage to generator. Overloading
will trip circuit breaker.

IMPORTANT: Keep full power selector
switch in the 120 VOLT ONLY position if
only powering 120V items. Only move
switch to 120/240 VOLT position if
powering 240V items.

1. Check items to be powered. Their
nameplate lists their wattage ratings.

NOTE: The wattage ratings for some
electrical motors are misleading. They
may require 3 to 6 times their rated full­load wattage to start. You must figure
total electrical load wattage. Make sure
total wattage of all electrical loads does
not exceed rated wattage of generator.
See “Determining Electrical Load For
Generator,” page 10.

2. Start engine. Let engine reach full speed.

3. Connect electrical loads one at a time. If
the load consists of electric motors, start
them first. Always start the largest first.
Start each motor individually.

14

DISCONNECTING ELECTRIC LOADS

Remove electrical loads one at a time.
Remove voltage sensitive items first.
Voltage sensitive items include TVs, VCRs,
and other home electronic items.

STOPPING ENGINE

Follow the steps below to stop engine.

1. Remove all electrical loads from
generator (See “Disconnecting Electrical
Loads,” above). Remove electrical loads
one at a time.

2. Let engine run for two or three minutes
after removing electrical loads. This lets
engine cool slightly.

3. Push down engine stop lever (See Figure

23). This releases engine run lever and
stops engine. Do not stop engine with
the decompression lever.

4. Turn the starter key to the OFF position.

Engine Stop Lever

Figure 23 - Pushing Down Engine Stop
Lever

5. Turn fuel valve lever off. Do this by
moving valve lever to the “S” position
(See Figure 24, page 15).

6. Slowly pull starter rope until you feel
strong resistance. Gently return starter
rope to engine. This action closes the
intake and exhaust valves. This prevents
rust from forming while not using engine.

107358

Dayton Operating Instructions and Parts Manual

Version B - For Reduction G016.J

Model 4W315C

Operation (continued)

O

S

Fuel Valve Lever

Figure 24 - Fuel Valve Lever In “S” Position

Maintenance and Repairs

Only a qualified

electrical service
person should service and repair the
alternator on this generator. Use only
factory approved replacement parts.

You must always

run the engine at
full speed. Do not run engine at lower
speeds. At full speed, the engine runs
at 3600 RPM under load. The engine
must maintain 3600 RPM for generator
to create correct voltage. Running
engine at lower speeds will damage
generator and powered items.

Shut off generator

before performing
maintenance.

IMPORTANT: Keep generator level when
servicing. Never turn generator upside
down or stand it on end to service.

NOTE: We supply the engine owner’s
manual with generator. Refer to that
manual for questions concerning engine
maintenance and repairs.

Non-engine parts require little maintenance.
Keep generator clean. Use a damp cloth to
clean outside surfaces. Never use water to
clean generator. Water can cause damage to
internal parts. Use vacuum to clean air inlet
and outlet louvers of alternator.

SERVICING THE ENGINE

For Yanmar engine replacement parts,
contact Grainger Parts at 1-800-323-0620.

Yanmar engine servicing should be
handled by your nearest authorized
Yanmar engine service firm. Contact
Yanmar at 1-847-541-1900 for nearest
authorized Yanmar engine service firm.

ENGINE MAINTENANCE

Periodic checks and maintenance are very
important for keeping the engine in good
condition and durable. The chart on page
18 indicates which checks to make and
when to make them. The mark “•”
indicates that special tools and skills are
required. Items marked “•” should be
serviced by an authorized Yanmar dealer,
unless the owner has the proper tools and
is mechanically proficient.

Consult your Yanmar dealer.

Shut off the

engine before
performing any maintenance. If the
engine must be run, make sure the area
is well ventilated. The exhaust contains
poisonous carbon monoxide gas.

After the engine

has been used,
clean the engine immediately with a
cloth to prevent corrosion and to
remove sediment.

Only use genuine

Yanmar parts. The
use of replacement parts which are
not of equivalent quality may damage
the engine.

HOW TO CHANGE YOUR ENGINE OIL

Remove the oil filler cap. Remove the drain
plug and drain the old oil while the engine
is still warm. The plug is located on the
bottom of the cylinder block. Tighten the
drain plug and refill with the recom­mended oil. (See the section under
“Preparations for Starting” in the engine
owner’s manual.)

CLEANING THE OIL FILTER

Loosen the fixing bolt and then pull out
the oil filter. Clean oil filter every six
months or 500 hours of operation.

CHANGING THE AIR CLEANER ELEMENT

Do not wash the air cleaner element with
detergent because this is a wet-type
element. Change air cleaner element every
six months or 500 hours of operation (or
earlier if dirty).

See the section for changing the air
cleaner element under “Preparations for
Starting” in the engine owner’s manual.

Never run the

engine without
the air cleaner element or with a
defective element.

NOTE: A clogged element hinders the
flow of air to the combustion chamber.
This reduces engine output, increases lube
oil and fuel oil consumption and makes
starting difficult. Make sure you clean your

107358

®

15

Dayton Operating Instructions and Parts Manual

®

Dayton Diesel Electric Generator

4W315C

Maintenance and Repairs
(Continued)

element regularly.

CLEANING AND REPLACING THE FUEL
FILTER

The fuel filter also has to be cleaned
regularly to insure maximum engine output.
Clean fuel filter every six months or 500
hours of operation. Replace fuel filter every
year or 1000 hours of operation.

1. Drain the fuel oil from the fuel tank.

2. Loosen the nuts of the fuel cock and
pull out the filter from the fuel tank
filler port. Wash the filter thoroughly
with diesel fuel.

CLEANING THE SPARK ARRESTER

If the engine has

been running, the
muffler and the spark arrester will be
very hot. Allow these to cool before
proceeding.

Remove the lock nut, end cap and diffuser
discs and clean off the carbon deposits.
Clean spark arrester every three months or
100 hours of operation (or earlier if dirty).

Clamp

Spark
Arrester

Muffler

End Cap

Figure 25 - Spark Arrester

Diffuser
Discs

Lock Nut

A clogged spark

arrester hinders
the flow of exhaust gas. This reduces
engine output, increases fuel con­sumption and makes starting difficult.
Make sure you clean your spark
arrester regularly.

TIGHTEN CYLINDER HEAD BOLTS

Tightening the cylinder head bolts requires
a special tool. Don’t try it yourself. Consult
your Yanmar dealer.

CHECKING THE INJECTION NOZZLE,
INJECTION PUMP, ETC.

• Adjusting the valve head clearance for
the intake and exhaust valves.

• Lapping of intake and exhaust valves.

• Replacing piston ring.

All these require special tools and skills.
Consult your Yanmar dealer.

Do not perform the

injection nozzle
test near an open fire or any other kind
of fire. The fuel spray may ignite. Do
not expose bare skin to the fuel spray.
The fuel may penetrate the skin and
cause injury to the body. Always keep
your body away from the nozzle.

CHECKING AND REPLENISHING BATTERY
FLUID AND CHARGING THE BATTERY

Battery fluid will be lost through continu­ous charging and discharging.

The battery

electrolyte
contains sulfuric acid. Protect your
eyes, skin, and clothing. In case of
contact, flush thoroughly with water
and get prompt medical attention,
especially if your eyes are affected.

Batteries generate

hydrogen gas,
which can be highly explosive. Do not
smoke or allow flames or sparks near
the battery, especially during charging.

NOTE: Much more fluid is lost during
summer than in winter.

Before starting, check for physical damage
to the battery and also the electrolyte
levels, and replenish with distilled water up
to the upper mark if necessary. When
actual damage is discovered, replace the
battery. Check battery fluid monthly.

Before charging,

remove the cap
from each cell of the battery. Charge
the battery in a place where there is
plenty of ventilation. Discontinue
charging if the electrolyte temperature
exceeds 45° C (117° F).

Do not charge the

battery with the
battery cable still connected. The diodes
will be damaged by the high voltage.

Connect the (+)

lead of the charger
to the (+) terminal of the battery, and
the (–) lead to the (–) terminal. Re­versed polarity will damage the
charger rectifier or the battery.

Storage

Remove all fuel

from fuel tank
before storing generator. Store fuel in
approved container. Store fuel in a
well-vented area free of open flames
or sparks.

The muffler

becomes very hot
during operation. The muffler remains
hot for a while after shutdown. Let
engine cool before storing.

IMPORTANT: Keep generator level while
in storage. Never store generator upside
down or standing on end.

Cover and store generator in a clean, dry
place. Do not expose generator to extreme
high or low temperatures during storage.

16

107358

Dayton Operating Instructions and Parts Manual

Version B - For Reduction G016.J

Model 4W315C

Storage (Continued)

ENGINE STORAGE

If storing your engine for long periods,
make the following preparations.

1. Operate the engine for about 3 minutes
and then stop.

2. Stop the engine. Drain the engine lube
oil while the engine is still warm and fill
with new oil.

3. Pull the recoil starter slowly. Stop when
it feels tight. This closes the intake and
exhaust valves (in compression position)
and helps prevent rust from forming.

4. Wipe the oil and dirt from the engine
and store in a dry place.

CHART 3

Service Service Service Service

Item Check Monthly or 20 Hrs. or 100 Hrs. or 500 Hrs. or 1000 Hrs.

Daily Service Month 3 Months 6 Months Year

Check and replenish fuel oil
Drain fuel from fuel tank
Check and replenish lube oil
Check for oil leakage
Check and tighten engine parts
Check and tighten engine head bolts
Change lube oil (first time)
Change lube oil (each time after first)
Clean oil filter (replace if needed)
Replace air cleaner element (Service more

frequently when used in dusty areas)
Clean fuel filter
Replace fuel filter
Clean spark arrester
Check fuel injection pump
Check fuel injection nozzle
Check fuel piping (replace if needed)
Adjust valve head clearance for intake

and exhaust valves (first time at 20 hrs)
Adjust valve head clearance for intake

and exhaust valves (each time after first)
Lap intake and exhaust valves
Replace piston rings
Check battery fluid

First Every Every Every

107358

Special tools and skills required.
No special tools or skills required.

®

17

Dayton Operating Instructions and Parts Manual

®

Dayton Diesel Electric Generator

Wiring Diagrams

4W315C

120/240V 20A

Receptacle

White

Black

Green

T2

Green

Red

Black

Red

T2

Black

Black

White

Main

Windings

Red

Black

Capacitor

White

Green/Yellow

Circuit

T1

Breaker

25A

Circuit

Breaker

25A

Yellow

Black

Red

White

T1

T3

T4

Black

T4

T3

Figure 26 - Alternator Wiring Diagram

Green/White

Charge

Coil

Green/White

White

Hour
Meter

T1

T2

Full Pwr
Selector

Switch

T3

Yellow

Red

Red

T4

Charge

Regulator

Fuse

Diode

White

Rotor

Green

Yellow

White

Black

White
120V, 15A
Receptacle

Duplex

Auxiliary

Phase

Diode

Red

White

2
3
4
1

Stator

Brown

White

120V, 15A

Receptacle

GFCI

HOT

LINE

Green

Black

Green

Green

WHITE

L1

Green
Yellow

White

White

T1

110/120V

Red

120V, 30A

Receptacle

Green

Stator

T2

T3

220/240V

110/120V

Key

Switch

T4

L2

Charge

Lamp

Circuit

Breaker

20A

Circuit

Breaker

20A

Black

Figure 27 - Engine Wiring Diagram

Green/White

Green/White

White Red

Red

Red

Bridge

Black

Starter

Motor/

Solenoid

+

-

Battery

30

86

Red White

Pressure Lamp

Black

Relay

Low Oil

Red

87

85

Shutdown
Solenoid

White

P

Yellow

Oil
Pressure
Switch

Black

18

107358

Dayton Operating Instructions and Parts Manual

Version B - For Reduction G016.J

Model 4W315C

Troubleshooting Chart

NOTE: See engine owner’s manual for

engine troubleshooting.

Symptom

No voltage when starting generator with
no electrical load

Voltage is less than normal voltage with
no electrical load

Voltmeter reading more than 10% high
with no electrical load

Only a qualified

electrical service
person should service and repair
generator. Use only factory approved
replacement parts.

Possible Cause(s)

1. Defective capacitor

2. Winding short circuit or loose connec-

tions

3. Defective rotor diode

4. Loss of residual magnetism

1. Engine speed too low

2. Clogged spark arrester

3. Defective rotor diode

4. Partial short circuit in winding

5. Defective capacitor

Engine speed too high

Corrective Action

1. Replace capacitor

2. Check resistance of coils (See “Electrical
Component Specifications,” page 2)

3. Replace both diodes on rotor

4. Apply 12-volt battery to capacitor
terminals for 2-3 seconds

1. Set engine speed to 3720 RPM (62 Hz)
with no load

2. Clean arrester. See engine owner’s
manual

3. Replace both diodes on rotor

4. Check resistance of coils (See “Electrical
Component Specifications,” page 2)

5. Replace capacitor

Set engine speed to 3720 RPM (62 Hz)
with no load

Voltmeter reading correct with no
electrical load, but more than 10% low
when electrical load is added

Engine will not start

107358

1. Defective rotor diode

2. Electrical load too high

3. Engine not running properly

1. Fuel level too low

2. Fuel cock not in “O” (open) position

3. Diesel fuel not reaching the fuel
injection pump or nozzle

4. Speed control lever not in START
position

5. Lube oil level not correct

6. Fuel injection nozzle not working right

7. Recoil starter not pulled quickly and
firmly enough

8. Spark arrester clogged by carbon

9. Battery not discharging

19

1. Replace both diodes on rotor

2. Do not overload generator

3. Contact an authorized engine service
center

1. Add fuel to fuel tank

2. Move fuel cock to “O” (open) position

3. See qualified Yanmar service person

4. Move speed control lever to START
position

5. Add lube oil to engine

6. See qualified Yanmar service person

7. When starting engine with recoil starter,
pull starter rope quickly and firmly. You
must pull starter rope all the way out

8. Clean spark arrester. See “Cleaning the
Spark Arrester,” page 16

9. Loose battery connections, corrosion on
battery terminals, or battery dead

®

Dayton Operating Instructions and Parts Manual

4W315C

4W315C

For Repair Parts, call 1-800-323-0620

Dayton Diesel Electric Generator

24 hours a day - 365 days a year

Please provide following information:

-Model number

-Serial number (if any)

-Part description and number as shown in parts list

Address parts correspondence to:

Grainger Parts
P.O. Box 3074
1657 Shermer Road
Northbrook, IL 60065-3074 U.S.A.

®

1

E

F

5

2

3

9

8

6

7

12

16

13

9

Figure 28 – Repair Parts Illustration for Fuel Tank and Roll Cage

11

17

15

10

9

14

4

20

14

19

19

14

18

9
8

8

9

20

107358

Dayton Operating Instructions and Parts Manual

Version B - For Reduction G016.J

Repair Parts List for Fuel Tank and Roll Cage

Model 4W315C

Reference Part No. for
Number Description Model 4W31SC: Quantity

4W315C

1 Fuel tank assembly 099935-01 1
2 1/4-20 x 3/4" Screw * 4
3 1/4" Washer WP-4C 4
4 1/4-20 Nut 103880-01 4
5 Roll cage 099943-01 1
6 Spreader 099945-01 1
7 5/16-18 x 1

1

/2" Bolt * 2
8 5/16" Washer WP-5C 5
9 5/16-18 Nut NEC-5C 9

10 1/2-20 x 1" Screw 26302006 2
11 1/2" Lockwasher WLI-8 2
12 Shock mounts 17529000 2
13 5/16-18 x 3/4" Bolt 26007004 4
14 5/16" Washer WLE-5 3
15 Shock mount 099853-02 1
16 Battery bracket 099749-01 1
17 Hook bolt 099750-01 2
18 Ground strap 14138000 1
19 1/4-20 x 1/2" Screw * 2
20 #8-18 x 1/2" Sems screw 100410-01 4

∆ Safety information decal 099947-01 1
∆ Operation decal 099948-01 1
∆ Battery cable (positive) 099873-01 1
∆ Battery cable (negative) 099873-02 1

107358

(∆) Not shown.
(*) Standard hardware. Available from local hardware store.

®

21

Dayton Operating Instructions and Parts Manual

4W315C

4W315C

For Repair Parts, call 1-800-323-0620

Dayton Diesel Electric Generator

24 hours a day - 365 days a year

Please provide following information:

-Model number

-Serial number (if any)

-Part description and number as shown in parts list

Address parts correspondence to:

Grainger Parts
P.O. Box 3074
1657 Shermer Road
Northbrook, IL 60065-3074 U.S.A.

®

21

23

14

19

20

22

23

9

8

7

6

5

1

2

Figure 29 – Repair Parts Illustration for Alternator Assembly

10

4

24

11

3

12

13

15

16

17

18

22

107358

Dayton Operating Instructions and Parts Manual

Version B - For Reduction G016.J

Repair Parts List for Alternator Assembly

Model 4W315C

Reference Part No. for
Number Description Model 4W31SC: Quantity

1 End cover 099844-01 1
2 M5 x 13 Screw 099701-01 6
3 Bushing 099760-01 1
4Terminal block (4-block) 099863-01 1
5Terminal block (2-block) 099863-02 1
6Ground lug † 1
7 #10-16 x 3/8" Screw M11084-26 1
8 Stator bolt 099847-02 4

9 5/16" Lockwasher WLE-5 4
10 Bearing housing 099843-01 1
11 Capacitor 27005003S 1
12 Stator † 1
13 Fan bracket 27003002 1
14 M8 x 20 Screw * 4
15 Rotor nut 099891-01 1
16 Draw bolt 099842-02 1
17 Bearing 27003003 1
18 Diode 27003012S 2
19 Rotor † 1
20 Fan 27003008 1
21 Engine flange 101839-01 1
22 3/8-16 x 5/8" Bolt * 4
23 3/8" Lockwasher * 8
24 Foam pad 099892-01 1

∆ Alternator assembly complete 099723-02 1

4W315C

(†) Parts not available. Included in Alternator Assembly.
(∆) Includes reference numbers 1 through 24.

(*) Standard hardware. Available from local hardware store.

107358

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23

Dayton Operating Instructions and Parts Manual

4W315C

4W315C

For Repair Parts, call 1-800-323-0620

Dayton Diesel Electric Generator

24 hours a day - 365 days a year

®

Please provide following information:

-Model number

-Serial number (if any)

-Part description and number as shown in parts list

Address parts correspondence to:

Grainger Parts
P.O. Box 3074
1657 Shermer Road
Northbrook, IL 60065-3074 U.S.A.

11

2

2

1

1

2

0

V

O

L

T

S

3

14

RESET

TEST

4

5

7

FULL POWER

120 ONLY

SELECTOR

E

N

M

0000

00

H

O

05

U

R

S 1/10

8

Figure 30 – Repair Parts Illustration for Control Panel

120/240V

6

12

1

2

0

/2

4

0

V

O

L

T

S

R

E

S

E

T

R

E

S

E

T

6

12

13

9

10

24

107358

Dayton Operating Instructions and Parts Manual

Version B - For Reduction G016.J

Repair Parts List for Control Panel

Model 4W315C

Reference Part No. for
Number Description Model 4W315C: Quantity

1 Control panel, front 103349-02 1
2 20 Amp Circuit breaker *22616009 2
3 120V, 30A Twist-lock receptacle *099833-01 1
4 120V, 15A Duplex receptacle *15342000 1
5 Full power selector switch *099956-01 1
6 25 Amp Circuit breaker *22616011 2
7 120/240V, 20A Twist-lock receptacle *099834-01 1
8 Hour Meter 101350-01 1
9 Bushing 099760-01 1
10 #8-18 x 1/2" Sems screw 100410-01 4
11 Control box, rear 100149-01 1
12 U-nut 22261000 8
13 Switch plug 099997-01 1
14 120V, 15A GFCI Duplex receptacle 100445-01 1
∆ Panel schematic decal 100177-07 1
† Control panel assembly 103348-02 1

4W315C

107358

(∆) Not shown.
(†) Includes reference numbers 1 through 14.
(*) Includes fastening hardware.

®

25

Dayton Operating Instructions and Parts Manual

4W315C

4W315C

15

12

®

3

2

1

10

13

12

11

9

For Repair Parts, call 1-800-323-0620

Dayton Diesel Electric Generator

24 hours a day - 365 days a year

Please provide following information:

-Model number

-Serial number (if any)

-Part description and number as shown in parts list

Address parts correspondence to:

Grainger Parts
P.O. Box 3074
1657 Shermer Road
Northbrook, IL 60065-3074 U.S.A.

17

16

20

5

4

22

4

6

3

Figure 31 – Repair Parts Illustration for Switch Control Box

7

4

19

8

3

18

4

23

21

14

26

107358

Dayton Operating Instructions and Parts Manual

Version B - For Reduction G016.J

Repair Parts List for Switch Control Box

Model 4W315C

Reference Part No. for
Number Description Model 4W315C: Quantity

1 Switch control box 101037-01 1
2 Low oil light 22721000 1
3 Key switch, lamp, and harness assembly 099936-01 1
4 1/4-28 Keps nut 101039-01 4
5 Strain relief bushing 099760-01 1
6 1/4-20 x 5/8" Hex-head sems 101040-01 2
7Relay 26498000 1
8 #10-32 Hex locknut NTF-3C 1

9 Adhesive-backed PVC foam RN12000100 1
10 Connector * 1
11 #6-32 x 1/2" Hex tapping screw * 1
12 #6 Internal-tooth lockwasher * 5
13 Full bridge 26509000 1
14 #8-32 x 3/8" Screw * 4
15 Grommet * 1
16 #10 Flat washer WP-3C 1
17 #10-32 x 3/4" Hex-head screw 26499000 1
18 Solenoid 26490000 1
19 M4 x 8 Hex-head screw * 2
20 M3 x 8 Hex-head screw * 4
21 Control box cover 101038-01 1
22 Cable 101036-01 1
23 Conduit 101035-01 1

† Switch control box assembly 101103-01 1

4W315C

107358

(†) Includes reference numbers 1 through 23.
(*) Standard hardware. Available from local hardware store.

®

27

Dayton Operating Instructions and Parts Manual

®

4W315C

Dayton Diesel Electric Generator

NOTE: The five-year limited warranty below covers all non-engine parts of this generator including the alternator. Yanmar warrants the
engine. See engine owner’s manual for engine warranty information.

Limited Warranty

DAYTON FIVE-YEAR LIMITED WARRANTY. Professional-duty electric generator alternator, Model 4W315C, are warranted by

Dayton Electric Mfg. Co. (Dayton) to the original user against defects in workmanship or materials under normal use for five years
after date of purchase. Any part which is determined to be defective in material or workmanship and returned to an authorized
service location, as Dayton designates, shipping costs prepaid, will be, as the exclusive remedy, repaired or replaced at Dayton’s
option. For limited warranty claim procedures, see PROMPT DISPOSITION below. This limited warranty gives purchasers specific legal
rights which vary from jurisdiction to jurisdiction.

LIMITATION OF LIABILITY. To the extent allowable under applicable law, Dayton’s liability for consequential and incidental damages is
expressly disclaimed. Dayton’s liability in all events is limited to and shall not exceed the purchase price paid.

WARRANTY DISCLAIMER. Dayton has made a diligent effort to provide product information and illustrate the products in this
literature accurately; however, such information and illustrations are for the sole purpose of identification, and do not express or imply
a warranty that the products are MERCHANTABLE, or FIT FOR A PARTICULAR PURPOSE, or that the products will necessarily conform
to the illustrations or descriptions.

Except as provided below, no warranty or affirmation of fact, expressed or implied, other than as stated in the “LIMITED WARRANTY”
above is made or authorized by Dayton.

PRODUCT SUITABILITY. Many jurisdictions have codes and regulations governing sales, construction, installation, and/or use of products
for certain purposes, which may vary from those in neighboring areas. While Dayton attempts to assure that its products comply with
such codes, it cannot guarantee compliance, and cannot be responsible for how the product is installed or used. Before purchase and
use of a product, review the product applications, and all applicable national and local codes and regulations, and be sure that the
product, installation, and use will comply with them.

Certain aspects of disclaimers are not applicable to consumer products; e.g., (a) some jurisdictions do not allow the exclusion or limitation
of incidental or consequential damages, so the above limitation or exclusion may not apply to you; (b) also, some jurisdictions do not
allow a limitation on how long an implied warranty lasts, consequently the above limitation may not apply to you; and (c) by law, during
the period of this limited
warranty, any implied warranties of implied merchantability or fitness for a particular purpose applicable
to consumer products purchased by consumers, may not be excluded or otherwise disclaimed.

PROMPT DISPOSITION. Dayton will make a good faith effort for prompt correction or other adjustment with respect to any product
which proves to be defective within limited warranty. For any product believed to be defective within limited warranty, first write or
call dealer from whom the product was purchased. Dealer will give additional directions. If unable to resolve satisfactorily, write to
Dayton at address below, giving dealer’s name, address, date, and number of dealer’s invoice, and describing the nature of the defect.
Title and risk of loss pass to buyer on delivery to common carrier. If product was damaged in transit to you, file claim with carrier.

Manufactured for Dayton Electric Mfg. Co., 5959 W. Howard St., Niles, Illinois 60714 U.S.A.

Manufactured for Dayton Electric Mfg. Co.
Niles, Illinois 60714 U.S.A.

107358-01
Rev. B
07/03

®

Version B - For Reduction G016.J