MULTIQUIP MQ POWER DCA-125SSJU Guide

MULTIQUIP INC..
..
. PARTS DEPARTMENT:
18910 WILMINGTON AVE. 800-427-1244
CARSON, CALIFORNIA 90746 FAX: [phone]
310-537-3700 SERVICE DEPARTMENT:
800-421-1244 800-835-2551
FAX:[phone] FAX:[phone]
E-mail:[email protected] zz
zz
zwww:multiquip.com
© COPYRIGHT 2003, MULTIQUIP INC.
PARTS LIST NO. 3870300064A
S/N7500469 UP TO 7500507-125SSJU
S/N FROM 7500508-125SSJU2
MQ POWER
DCA-125SSJU
DCA-125SSJU2
PORTABLE
GENERATOR
(STANDARD)
OPERATION AND PARTS MANUAL
Revision #4 (06/03/03)

PAGE 2 — DCA-125SSJU SERIES (STANDARD) — PARTS AND OPERATION MANUAL — REV. #4 (06/03/03)

DCA-125SSJU SERIES (STANDARD)— PARTS AND OPERATION MANUAL— REV. #4 (06/03/03) — PAGE 3
HERE'S HOW TO GET HELP
PLEASE HAVE THE MODEL AND SERIAL
NUMBER ON-HAND WHEN CALLING
PARTS DEPARTMENT
800-427-1244 or 310-537-3700
FAX: [phone] or 310-637-3284
SERVICE DEPARTMENT
800-421-1244
FAX: [phone]
TECHNICAL ASSISTANCE
800-478-1244
FAX: [phone]
WARRANTY DEPARTMENT
888-661-4279, or 310-661-4279
FAX: [phone]

PAGE 4 — DCA-125SSJU SERIES (STANDARD) — PARTS AND OPERATION MANUAL — REV. #4 (06/03/03)
TABLE OF CONTENTS
Specification and part
number are subject to
change without notice.
NOTE
COMPONENT DRACOMPONENT DRA
COMPONENT DRACOMPONENT DRA
COMPONENT DRAWINGSWINGS
WINGSWINGS
WINGS
Name Plate And Decals ............................................ 64-65
Generator Assembly .................................................. 66-69
Control Box Assembly ............................................... 70-73
Engine & Radiator Assembly..................................... 74-77
Engine Operating Panel Assembly ............................ 78-79
Output Terminal Assembly ......................................... 80-81
Battery Assembly ...................................................... 82-83
Muffler Assembly ...................................................... 84-85
Fuel Tank Assembly .................................................. 86-87
Enclosure Assembly ................................................. 88-91
Rubber Seal Assembly .............................................. 92-93
Terms and Condition of Sale — Parts ............................ 94
DCA-125SSJU &DCA-125SSJU &
DCA-125SSJU &DCA-125SSJU &
DCA-125SSJU &
DCA-125SSJU2DCA-125SSJU2
DCA-125SSJU2DCA-125SSJU2
DCA-125SSJU2
AC GENERAAC GENERA
AC GENERAAC GENERA
AC GENERATORTOR
TORTOR
TOR
Here's How To Get Help .................................................... 3
Table Of Contents ............................................................. 4
Parts Ordering Procedures ............................................... 5
Specifications ................................................................... 6
Dimensions (Top, Side, Front) ........................................... 7
Safety Message Alert Symbols .................................... 8-9
Rules for Safe Operation ........................................... 10-13
Installation ................................................................. 14-15
Towing Safety Precaution ............................................... 16
Trailer Specifications ................................................. 17-19
Generator Decals ....................................................... 20-21
General Information ........................................................ 22
Major Components ......................................................... 23
Generator Control Panel ................................................. 24
Engine Operating Panel (up to S/N 7500507) ................. 25
Engine Operating Panel (S/N 7500508~) ................... 26-27
Output Terminal Panel Familiarization ........................ 28-30
Load Application ............................................................. 31
Generator Outputs ..................................................... 32-33
Gauge Reading ............................................................... 33
Output Terminal Panel Connections ........................... 34-35
Pre Setup .................................................................. 36-40
Generator Start-up Procedure (Manual) ..................... 41-44
Generator Start-up Procedure (Auto Mode) .................... 45
Generator Shut-Down Procedure .................................... 46
Maintenance .............................................................. 47-49
Trailer Brakes Maintenance ............................................ 50
Trailer Maintenance .................................................... 51-52
Trailer Wiring Diagram ..................................................... 53
Generator Wiring Diagram ............................................... 54
Engine Wiring Diagram (Ignition Switch) ......................... 55
Engine Wiring Diagram (w/ Controller) ............................ 56
Engine Troubleshooting .............................................. 58-59
Generator Troubleshooting .............................................. 60
Engine Controller Troubleshooting ................................... 61
Explanation of Code in Remarks Column ....................... 62
Suggested Spare Parts .................................................. 63

DCA-125SSJU SERIES (STANDARD)— PARTS AND OPERATION MANUAL— REV. #4 (06/03/03) — PAGE 5
PARTS ORDERING PROCEDURES
When ordering parts,
please supply the following information:
❒❒
❒❒
❒Dealer account number
❒❒
❒❒
❒Dealer name and address
❒❒
❒❒
❒Shipping address (if different than billing address)
❒❒
❒❒
❒Return fax number
❒❒
❒❒
❒Applicable model number
❒❒
❒❒
❒Quantity, part number and description of each part
❒❒
❒❒
❒Specify preferred method of shipment:
✓FedEx or UPS Ground
✓FedEx or UPS Second Day or Third Day
✓FedEx or UPS Next Day
✓Federal Express Priority One
✓DHL
✓Truck
Here’s how to get help...
Please have the model and serial number on
hand when calling.
Parts Department
800-427-1244 Fax: [phone]
310-537-3700 Fax: [phone]
Mayco Parts
800-306-2926 Fax: [phone]
310-537-3700 Fax: [phone]
Service Department
800-478-1244 Fax: [phone]
310-537-3700
MQ Power Service Department
800-835-2551 Fax: [phone]
310-537-3700
Warranty Department
800-421-1244, Ext. 279 Fax: [phone]
310-537-3700, Ext. 279
Multiquip’s Main Phone Numbers
800-421-1244 Fax: [phone]
310-537-3700
Note:Unless otherwise indicated by customer, all
orders are treated as “Standard Orders”, and will
ship within 24 hours.We will make every effort to
ship “Air Shipments” the same day that the order is
received, if prior to 2PM west coast time. “Stock
Orders” must be so noted on fax or web forms.
Extra Discounts!
All parts orders which include complete part numbers
and are received by our automated web parts order
system, or by fax qualify for the following extra
discounts:
Ordered Standard Stock orders
via orders ($750 list and above)
Fax 3% 10%
Web 5% 10%
Special freight allowances
when you order 10 or more
line items via Web or Fax!**
FedEx Ground Service at no charge for freight
No other allowances on freight shipped by any other
carrier.
Place Your Parts Order Via Web or Fax
For Even More Savings!
NOTE:DISCOUNTS ARE SUBJECT TO CHANGE
MULTIQUIP INC.
18910 WILMINGTON AVENUE
POST OFFICE BOX 6254
CARSON, CALIFORNIA 90749
310-537-3700 • 800-421-1244
FAX: [phone]
E-MAIL: [email protected]
WWW:multiquip.com
Direct TOLL-FREE access
to our Parts Department:
Toll-free nationwide — 800-427-1244

PAGE 6 — DCA-125SSJU SERIES (STANDARD) — PARTS AND OPERATION MANUAL — REV. #4 (06/03/03)
snoitacificepSrotareneG.1elbaT
ledoM2UJSS521/UJSS521-ACD
epyT gniraebelgnisfoorppird,detalitnevfles,dleifgnivloveR
noitcennoCerutamrA gaZgiZ/lartueNhtiwratS
esahP-3egatloV elbahctiwsV084,044,614,042,022,802
esahP-elgniSegatloV elbahctiwsV772,452,042,931,721,021
tuptuOybdnatS )WK011(AVK5.731
tuptuOemirP )WK001(AVK521
ycneuqerF zH06
deepS mpr0081
rotcaFrewoP 8.0
lluF)A(BdleveLdnuoS
teef32tadaoL 76
noitalusnI FssalC
snoitacificepSenignE
ledoM 052FT8606EREEDNHOJ
epyT degrahc-obrut,noitcejnitcerid,delooc-retaw,elcyC4
srednilyCfo.oN srednilyc6
ekortSxeroB )mm721xmm601(
tuptuOdetaR mpr0081/PH051
tnemecalpsiD )cc4276(.ni.uc014
gnitratS cirtcelE
yticapaCtnalooC )sretil93(.lag3.01
yticapaCliOebuL )sretil71(.lag5.4
noitpmusnoCleuF
tarh/)L4.82(lag5.7 daollluf tarh/)L6.12(lag7.5 daol4/3
tarh/)L1.51(lag0.4 daol2/1 tarh/)L7.8(lag3.2 daol4/1
yrettaB 1xHA051-V21
leuF leuFleseiD2#
DCA-125SSJU SERIES — SPECIFICATIONS

DCA-125SSJU SERIES (STANDARD)— PARTS AND OPERATION MANUAL— REV. #4 (06/03/03) — PAGE 7
DCA-125SSJU SERIES — DIMENSIONS
Figure 1. Dimensions

PAGE 8 — DCA-125SSJU SERIES (STANDARD) — PARTS AND OPERATION MANUAL — REV. #4 (06/03/03)
This Owner's Manual has been
developed to provide complete
instructions for the safe and
efficient operation of the MQ Power
Model DCA125SSJU Series
WHISPERWATT™ GENERATOR.
Before using this GENERATOR, ensure that the operating
individual has read and understands all instructions in this
manual.
Safety precautions should be followed at all times when operating
this equipment. Failure to read and understand the Safety
Messages and Operating Instructions could result in injury to
yourself and others.
FOR YOUR SAFETY AND THE SAFETY OF OTHERS!
SAFETY MESSAGE ALERT SYMBOLS
The three (3) Safety Messages shown below will inform you
about potential hazards that could injure you or others. The
Safety Messages specifically address the level of exposure to
the operator, and are preceded by one of three words: DANGER,
WARNING, or CAUTION.
DANGER: You WILL be KILLED or
SERIOUSLY injured if you DO NOT follow
directions.
WARNING: You CAN be KILLED or
SERIOUSLY injured if you DO NOT follow
directions.
CAUTION: You CAN be injured if you
DO NOT follow directions.
HAZARD SYMBOLS
Engine exhaust gases contain poisonous
carbon monoxide. This gas is colorless and
odorless, and can cause death if inhaled.
NEVER operate this equipment in a confined
area or enclosed structure that does not
provide ample free flow air.
Potential hazards associated with trowel operation will be
referenced with "
Hazard Symbols " which appear throughout
this manual, and will be referenced in conjunction with Safety
"
Message Alert Symbols ".
Diesel fuel is extremely flammable, and its
vapors can cause an explosion if ignited. DO
NOT start the engine near spilled fuel or
combustible fluids. DO NOT fill the fuel tank
while the engine is running or hot. DO NOT
overfill tank, since spilled fuel could ignite if it
comes into contact with hot engine parts or
sparks from the ignition system. Store fuel in
approved containers, in well-ventilated areas
and away from sparks and flames. NEVER
use fuel as a cleaning agent.
Burn Hazards
Engine components can generate extreme heat.
To prevent burns, DO NOT touch these areas
while the engine is running or immediately after
operations. NEVER operate the engine with
heat shields or heat guards removed.
Rotating Parts
NEVER operate equipment with covers, or
guards removed. Keep
fingers , hands , hair
and clothing away from all moving parts to
prevent injury.
Explosive Fuel
Lethal Exhaust Gases
NOTE
DCA-125SSJU SERIES — SAFETY MESSAGE ALERT SYMBOLS

DCA-125SSJU SERIES (STANDARD)— PARTS AND OPERATION MANUAL— REV. #4 (06/03/03) — PAGE 9
Accidental Starting
ALWAYS place the engine ON/OFF
switch in the OFF position, when the
trowel is not in use.
Over Speed Conditions
NEVER tamper with the factory settings of the
engine governor or settings. Personal injury
and damage to the engine or equipment can
result if operating in speed ranges above
maximum allowable.
Respiratory Hazard
ALWAYS wear approved respiratory protection.
ALWAYS wear approved eye and hearing
protection.
Sight and Hearing hazard
Equipment Damage Messages
Other important messages are provided throughout this manual
to help prevent damage to your trowel, other property, or the
surrounding environment.
This generator , other property, or
the surrounding environment could
be damaged if you do not follow
instructions.
NOTE
DCA-125SSJU SERIES — SAFETY MESSAGE ALERT SYMBOLS

PAGE 10 — DCA-125SSJU SERIES (STANDARD) — PARTS AND OPERATION MANUAL — REV. #4 (06/03/03)
DCA-125SSJU SERIES — RULES FOR SAFE OPERATION
CAUTIONCAUTION
CAUTIONCAUTION
CAUTION :
Failure to follow instructions in this manual may
lead to serious injury or even death! This
equipment is to be operated by trained and
qualified personnel only! This equipment is for
industrial use only.
The following safety guidelines should always be used when
operating the DCA-125SSJU Series Generator:
GENERAL SAFETY
■ DO NOT operate or service this equipment
before reading this entire manual.
■ This equipment should not be operated by persons under 18
years of age.
■ NEVER operate this equipment without proper
protective clothing, shatterproof glasses, steel-
toed boots and other protective devices required
by the job.
■ NEVER operate this equipment when not feeling
well due to fatigue, illness or taking medicine.
■ NEVER operate this equipment under the
influence or drugs or alcohol.
■ NEVER use accessories or attachments, which are not
recommended by MQ Power for this equipment. Damage to
the equipment and/or injury to user may result.
■ Manufacture does not assume responsibility for any accident
due to equipment modifications.
■ Whenever necessary, replace nameplate, operation and safety
decals when they become difficult read.
■ ALWAYS check the machine for loosened threads or bolts
before starting.
■ NEVER operate the generator in an explosive atmosphere or
near combustible materials. An explosion or fire could result
causing severe
bodily harm or even death.
■ High Temperatures – Allow the engine to cool before
performing service and maintenance functions. Contact
with hot! components
can cause serious
burns.
■ The engine of this
generator requires an
adequate free flow of
cooling air.
NEVER
operate the generator
in any enclosed or
narrow area where free
flow of the air is restricted. If the air flow is restricted it will
cause serious damage to the generator or engine and
may cause injury to people. The generator engine gives
off DEADLY carbon monoxide gas.
■ ALWAYS make sure generator is properly grounded.
■ NEVER use gas piping as an electrical ground.
■ DO NOT place hands or fingers inside generator engine
compartment when engine is running.
■ ALWAYS make sure generator installation is accordance with
national and local electrical codes .
■ ALWAYS have a qualified electrician perform the generator
wiring installation.
■ NEVER power cables or cords lay in wate r.
■ NEVER stand in water while AC power from the generator
is being transfer to a load.
■ NEVER use a defective or frayed power cable. Check the
cable for cuts in the insulation.
■ NEVER use a extension cord that is frayed or damaged where
the insulation has been cut.
■ ALWAYS make certain that proper extension cord has been
selected for the job See Table 5.
■ The electrical voltage required to operate the generator can
cause severe injury or even death through physical contact
with live circuits.
Turn all circuit breakers OFF before
performing maintenance on the generator.
■ NEVER touch the hot exhaust
manifold, muffler or cylinder. Allow
these parts to cool before servicing
engine or generator.

DCA-125SSJU SERIES (STANDARD)— PARTS AND OPERATION MANUAL— REV. #4 (06/03/03) — PAGE 11
DCA-125SSJU SERIES — RULES FOR SAFE OPERATION
■ Backfeed to a utility system can cause electrocution and or
property damage. DO NOT connect to any building's electrical
system except through an approved device or after building
main switch is opened. ALWAYS have a licensed electrician
perform the installation
CAUTIONCAUTION
CAUTIONCAUTION
CAUTION :
DO NOT touch or open any of the below
mentioned components while the
generator is running. Always allow
sufficient time for the engine and generator
to cool before performing maintenance.
Radiator
1. Radiator Cap - Removing the radiator cap while the engine
is hot will result in high pressurized, boiling water to gush
out of the radiator, causing severe scalding to any persons
in the general area of the generator.
2. Coolant Drain Plug - Removing the coolant drain plug
while the engine is hot will result in hot coolant to gush out
of the coolant drain plug, therefore causing severe scalding
to any persons in the general area of the generator.
3. Engine Oil Drain Plug - Removing the engine oil drain
plug while the engine is hot will result in hot oil to gush out
of the oil drain plug, therefore causing severe scalding to
any persons in the general area of the generator.
DANGERDANGER
DANGERDANGER
DANGER :
DANGERDANGER
DANGERDANGER
DANGER :
■ NEVER touch output terminals during operation. This is
extremely dangerous. ALWAYS stop the machine and
place the circuit breaker in the “OFF” position when contact
with the output terminals is required. There exists the
possibility of electrocution, electrical shock or burn,
which can cause severe bodily harm or even death !
Never use damaged or worn cables when
connecting equipment to the generator.
Make sure power
connecting
cables are
securely connected to the
generator’s output terminals,
insufficient tightening of the
terminal connections may cause
damage to the generator and
electrical shock.
.
Maintenance Safety
■ NEVER lubricate components or attempt service on a running
machine.
■ ALWAYS allow the machine a proper
amount of time to cool before servicing.
■ Keep the machinery in proper running condition.
■ Fix damage to the machine immediately and always replace
broken parts.
■ ALWAYS make sure that electrical circuits are properly
grounded per the National Electrical Code (NEC) and local
codes before operating generator.Severe
injury or death! by
electrocution can result from operating an ungrounded
generator.
■ ALWAYS be sure the operator is familiar with proper safety
precautions and operations techniques before using generator.
■ ALWAYS store equipment properly when it is not being used.
Equipment should be stored in a clean, dry location out of the
reach of children.
■ ALWAYS read, understand, and follow
procedures in Operator’s Manual before
attempting to operate equipment.
DANGERDANGER
DANGERDANGER
DANGER :
DANGERDANGER
DANGERDANGER
DANGER :
POWER
CORD
(POWER ON)
WET
HANDS
NEVER grab or
touch a live
power cord with
wet hands , the
possibility exists
of electrical shock, electrocution, and even
death!

PAGE 12 — DCA-125SSJU SERIES (STANDARD) — PARTS AND OPERATION MANUAL — REV. #4 (06/03/03)
DCA-125SSJU SERIES — RULES FOR SAFE OPERATION
■ NEVER Run engine without air filter. Severe engine
damage may occur.
■ ALWAYS service air cleaner frequently to prevent engine
malfunction.
■ ALWAYS disconnect the negative battery terminal before
performing service on the generator.
■ ALWAYS be sure the operator is familiar with proper safety
precautions when operating the generator set.
■ ALWAYS store equipment properly when not in use.
■ DO NOT leave the generator running in the manual mode
unattended.
■ DO NOT allow unauthorized people to operate this
equipment.
■ ALWAYS read, understand, and follow procedures in
Operator’s Manual before attempting to operate equipment.
■ Refer to the John Deere Engine Manual for engine
technical questions or information.
Battery
The battery contains acids that can cause injury to the eyes
and skin.To avoid eye irritation, always wear safety glasses.
Use well insulated gloves when picking up the battery. Use
the following guidelines when handling the battery:
1. DO NOT drop the battery. There is the possibility of risk
that the battery may explode.
2. DO NOT expose the battery to
open flames, sparks, cigarettes
etc. The battery contains
combustible gases and liquids. If
these gases and liquids come in
contact with a flame or spark, an
explosion could occur.
3. ALWAYS keep the battery charged. If the battery is not
charged a buildup of combustible gas will occur.
4. ALWAYS keep battery charging and cables in good working
condition. Repair or replace all worn cables.
5. ALWAYS recharge the battery in an vented air
environment, to avoid risk of a dangerous concentration
of combustible gases.
6. In case the battery liquid (dilute sulfuric acid) comes in
contact with clothing or skin , rinse skin or clothing
immediately with plenty of water.
7. In case the battery liquid (dilute sulfuric acid) comes in
contact with your eyes, rinse eyes immediately with plenty
of water, then contact the nearest doctor or hospital, and
seek medical attention.
Pay close attention to
ventilation when operating
the generator inside
tunnels and caves. The
engine exhaust contains noxious elements.
Engine exhaust must be routed to a
ventilated area.
DANGER:DANGER:
DANGER:DANGER:
DANGER:
Generator Grounding
To guard against electrical shock and possible damage to
the equipment, it is important to provide a good EARTH
ground.
Article 250 (Grounding) of the National Electrical Code
(NEC) provides guide lines for proper grounding and specifies
that the cable ground shall be connected to the grounding
system of the building as close to the point of cable entry
as practical.
ALWAYS be sure to use the ground terminal (green wire)
when connecting a load to the UVWO output terminals.
Transporting
■ ALWAYS shutdown engine before transporting.
■ Tighten both fuel tank caps securely.
■ If generator is mounted on a trailer, make sure trailer
complies with all local and state safety transportation
laws. See next page “ Towing Safety Precautions ” for
basic towing techniques.

DCA-125SSJU SERIES (STANDARD)— PARTS AND OPERATION MANUAL— REV. #4 (06/03/03) — PAGE 13
Emergencies
■ ALWAYS know the location of the nearest fire extinguisher .
■ ALWAYS know the location of the nearest and first aid kit .
■ In emergencies always know the location of the
nearest phone or
keep a phone on the job site .
Also know the phone numbers of the nearest
ambulance , doctor and fire department . This
information will be invaluable in the case of an
emergency.
To reduce the possibility of an accident while transporting
the generator on public roads, always make sure the trailer
that supports the generator and the towing vehicle are in
good operating condition and both units are mechanically
sound.
The following list of suggestions should be used when towing
your generator:
■ Make sure the hitch and coupling of the towing vehicle
are rated equal to, or greater than the trailer "gross vehicle
weight rating" (GVWR) of 6,000 lbs.
■ ALWAYS inspect the hitch and coupling for wear. NEVER
tow a trailer with defective hitches, couplings, chains
etc.
■ Check the tire air pressure on both towing vehicle and
trailer. Trailer tires should be inflated to 50 psi cold.
Also check the tire tread wear on both vehicles.
■ ALWAYS make sure the trailer is equipped with a "Safety
Chain".
■ ALWAYS attach trailer’s safety chains to towing vehicle
properly.
■ ALWAYS make sure the vehicle and trailer directional,
backup, brake, and trailer lights are connected and
working properly.
■ The maximum speed for highway towing is 45 MPH
unless posted otherwise. Recommended off-road towing
is not to exceed 10 MPH or less depending on type of
terrain.
■ Place chock blocks underneath wheel to prevent rolling,
while parked.
■ Use the trailer’s swivel jack to adjust the trailer height to
a level position while parked.
■ Avoid sudden stops and starts. This can cause skidding,
or jack-knifing. Smooth, gradual starts and stops will
improve towing.
Towing Safety Precautions
CAUTION:CAUTION:
CAUTION:CAUTION:
CAUTION:
Conform to Department of Transportation
(DOT) Safety Towing Regulations before
towing generator.
■ Avoid sharp turns.
■ Trailer should be adjusted to a level position at all times
when towing.
■ Raise and lock trailer wheel stand in up position when
transporting.
■ DOT Requirements include the following:
DCA-125SSJU SERIES — RULES FOR SAFE OPERATION
z Connect and test electric brake operation.
z Secure portable power cables in cable tray with
tie wraps.

PAGE 14 — DCA-125SSJU SERIES (STANDARD) — PARTS AND OPERATION MANUAL — REV. #4 (06/03/03)
Figure 2. Typical Generator Grounding Application
DCA-125SSJU SERIES — INSTALLATION

DCA-125SSJU SERIES (STANDARD)— PARTS AND OPERATION MANUAL— REV. #4 (06/03/03) — PAGE 15
Outdoor Installation
Install the generator in a area that is free of debris,
bystanders, and overhead obstructions. Make sure the
generator is on secure level ground so that it cannot slide or
shift around. Also install the generator in a manner so that
the exhaust will not be discharged in the direction of nearby
homes.
The installation site must be relatively free from moisture
and dust. All electrical equipment should be protected from
excessive moisture. Failure to do will result in deterioration
of the insulation and will result in short circuits and grounding.
Foreign materials such as dust, sand, lint and abrasive
materials have a tendency to cause excessive wear to
engine and alternator parts.
Generator Grounding
To guard against electrical shock and possible damage to
the equipment, it is important to provide a good EARTH
ground.
Article 250 (Grounding) of the National Electrical Code (NEC)
provides guide lines for proper grounding and specifies that
the cable ground shall be connected to the grounding system
of the building as close to the point of cable entry as
practical.
NEC articles 250-64(b) and 250-66 set the following
grounding requirements:
1. Use one of the following wire types to connect the
generator to earth ground.
a. Copper - 10 AWG (5.3 mm2) or larger.
b. Aluminum - 8 AWG (8.4 mm2) or larger.
2. When grounding the generator (Figure 2) connect the
ground cable between the lock washer and the nut on
the generator and tighten the nut fully. Connect the other
end of the ground cable to earth ground.
3. NEC article 250-52(c) specifies that the earth ground
rod should be buried aminimum of 8 ft. into the ground.
When connecting the generator to
any buildings electrical system
ALWAYS consult with a licensed
electrician.
DCA-125SSJU SERIES — INSTALLATION
NOTE
CAUTIONCAUTION
CAUTIONCAUTION
CAUTION :
Pay close attention to ventilation when
operating the generator inside tunnels and
caves. The engine exhaust contains
noxious elements. Engine exhaust must
be routed to a ventilated area.
Indoor Installation
Exhaust gases from diesel engines are extremely poisonous.
Whenever an engine is installed indoors the exhaust fumes
must be vented to the outside.The engine should be installed
at least two feet from any outside wall. Using an exhaust
pipe which is too long or too small can cause excessive
back pressure which will cause the engine to heat excessively
and possibly burn the valves.
Mounting
The generator must be mounted on a solid foundation (such
as concrete) and set firmly on the foundation to isolate
vibration of the generator when it is running. The generator
must set at least 6 inches above the floor or grade level (in
accordance to NFPA 110, Chapter 5-4.1). DO NOT remove
the metal skids on the bottom of the generator. They are to
resist damage to the bottom of the generator and to maintain
alignment.

PAGE 16 — DCA-125SSJU SERIES (STANDARD) — PARTS AND OPERATION MANUAL — REV. #4 (06/03/03)
To reduce the possibility of an accident while transporting
the generator on public roads, always make sure the trailer
(Figure 4) that supports the generator and the towing vehicle
are in good operating condition and both units are
mechanically sound.
The following list of suggestions should be used when towing
your generator:
CAUTIONCAUTION
CAUTIONCAUTION
CAUTION :
Towing Safety Precautions
Check with your local county or state safety
towing regulations before towing your
generator.
■ Make sure the hitch and coupling of the towing vehicle
are rated equal to, or greater than the trailer "gross vehicle
weight rating" (GVWR).
■ ALWAYS inspect the hitch and coupling for wear. NEVER
tow a trailer with defective hitches, couplings, chains
etc.
■ Check the tire air pressure on both towing vehicle and
trailer. Also check the tire tread wear on both vehicles.
■ ALWAYS make sure the trailer is equipped with a "Safety
Chain".
DCA-125SSJU SERIES — TOWING SAFTEY PRECAUTIONS
■ ALWAYS attach trailer’s safety chain to bumper of towing
vehicle.
■ ALWAYS make sure the vehicle and trailer directional,
backup, brake, and trailer lights are connected and
working properly.
■ The maximum speed for highway towing is 55 MPH
unless posted otherwise. Recommended off-road towing
is not to exceed 15 MPH or less depending on type of
terrain.
■ Place chocked blocks underneath wheel to prevent
rolling, while parked.
■ Place support blocks underneath the trailer’s bumper to
prevent tipping, while parked.
■ Use the trailer’s hand winch to adjust the height of the
trailer, then insert locking pin to lock wheel stand in place,
while parked.
■ Avoid sudden stops and starts. This can cause skidding,
or jackknifing. Smooth, gradual starts and stops will
improve gas milage.
■ Avoid sharp turns to prevent rolling.
■ Remove wheel stand when transporting.
■ DO NOT transport generator with fuel in tank.
Figure 3. Generator with Trailer

DCA-125SSJU SERIES (STANDARD)— PARTS AND OPERATION MANUAL— REV. #4 (06/03/03) — PAGE 17
Explanation of Chart:
This section is to provide the user with trailer service and
maintenance information. The service and maintenance
guidelines referenced in this section apply a wide range of
trailers. Remember periodic inspection of the trailer will en-
sure safe towing of the equipment and will prevent damage
to the equipment and personal injury.
It is the purpose of this section to cover the major mainte-
nance components of the trailer. The following trailer com-
ponents will be discussed in this section:
 Brakes
 Tires
 Lug Nut Torquing
 Suspension
 Electrical
 Brake Troubleshooting Tables
Use the following definitions when reading Table 2.
1. Fuel Cell - Provides an adequate amount of fuel for the
equipment in use. Fuel cells must be empty when trans-
porting equipment.
2. Braking System - System employed in stopping the
trailer. Typical braking systems are electric, surge, hy-
draulic, hydraulic-surge and air.
3. GVWR- Gross Vehicle Weight Rating (GVWR), is the
maximum number of pounds the trailer can carry, in-
cluding the fuel cell (empty).
4. Frame Length - Measurement is from the ball hitch to
the rear bumper (reflector).
DCA-125SSJU SERIES —TRAILER SPECIFICATIONS
CAUTIONCAUTION
CAUTIONCAUTION
CAUTION :
ALWAYS make sure the trailer is in good
operating condition. Check the tires for
proper inflation and wear. Also check the
wheel lug nuts for proper tightness.
5. Frame Length - Measurement is from fender to fender
6. Jack Stand - Trailer support device with maximum pound
requirement from the tongue of the trailer.
7. Coupler - Type of hitch used on the trailer for towing.
8. Tire Size - Indicates the diameter of the tire in inches
(10,12,14, etc.), and the width in millimeters
(175,185,205, etc.). The tire diameter must match the
diameter of the tire rim.
9. Tire Ply - The tire ply (layers) number is rated in letters;
2-ply,4-ply,6-ply, etc.
10. Wheel Hub - The wheel hub is connected to the trailer’s
axle.
11. Tire Rim - Tires mounted on a tire rim. The tire rim must
match the size of the tire.
12. Lug Nuts - Used to secure the wheel to the wheel hub.
Always use a torque wrench to tighten down the lug nuts.
See Table 17 and Figure 67 for lug nut tightening and
sequence.
13. Axle - Indicates the maximum weight the axle can sup-
port in pounds, and the diameter of the axle expressed
in inches. Please note that some trailers have a double
axle. This will be shown as 2-6000 lbs., meaning two
axles with a total weight capacity of 6000 pounds.
14. Suspension - Protects the trailer chassis from shocks
transmitted through the wheels. Types of suspension
used are leaf, Q-flex, and air ride.
15. Electrical - Electrical connectors (looms) are provided
with the trailer so the brake lights and turn signals can
be connected to the towing vehicle.
16. Application - Indicates which units can be employed
on a particular trailer.

PAGE 18 — DCA-125SSJU SERIES (STANDARD) — PARTS AND OPERATION MANUAL — REV. #4 (06/03/03)
DCA-125SSJU SERIES —TRAILER SPECIFICATIONS
snoitacificepSreliarT.2elbaT
LEDOM NOITACILPPA LEUF
LLEC
EKARB
METSYS
RWVG EMARF
HTGNEL
EMARF
HTDIW
KCAJ
DNATS
W01-RLRT ,522WDS
-WLT,052WGS
003
ONONSBL0091"69"05.BL008
LEEHWTLITLLUF
01-RLRT ,01ACD
-ACD,21GLT
51
ONONSBL0091"69"05.BL008
LEEHWTLITLLUF
FX01-RLRT -GLT,01ACD
,51ACD,21
003-WLT
LAG25ONSBL0091"69"05.BL008
LEEHWTLITLLUF
W522-RLRT ,SREDLEW
SS0007AD
ONONSBL0022"58"24.BL008
LEEHWTLITLLUF
004WLB-RLRT 004-WLBONCIRTCELESBL0072TSAM/W
"451
"421O/W
"55
"87(
)LLAT
.BL008
LEEHWTLITLLUF
X05-RLRT 52-ACDONONSBL0072"421"55.BL008
LEEHWTLITLLUF
FX05-RLRT 52-ACDLAG14ONSBL0072"421"55.BL008
LEEHWTLITLLUF
W07-RLRT ,06-,54-ACD
07
ONEGRUSSBL0007"681"77.BL0002
DAPTALF
X07-RLRT ,06-,54-ACD
07
TPOEGRUSSBL0007"831"66.BL0002
DAPTALF
FX07-RLRT ,06-,54-ACD
07
LAG35EGRUSSBL0007"831"66.BL0002
DAPTALF
FX001-RLRT 521,001-ACDLAG051CILUARDYH
EGRUS
SBL0007"091"67.BL0002
DAPTALF
521/58-RLRT ,001,58-ACD
521
LAG541CILUARDYHSBL00001"681"77.BL0002
DAPTALF
FX051-RLRT 081,051-ACDLAG002CILUARDYH
EGRUS
SBL06111"402"48.BL0005
DAPTALF
FX022-RLRT 022-ACDLAG052CILUARDYH
EGRUS
SBL00041"222"38.BL0005
DAPTALF
FX003-RLRT 003-ACDLAG052CILUARDYH
EGRUS
SBL00081"832"38.BL0005
DAPTALF
FX004-RLRT 004-ACDLAG053CIRTCELESBL00081"832"38.BL0005
DAPTALF
FX006-RLRT 008,006-ACDLAG055RIASBL00003"483"69.BL0005
DAPTALF
XS008-RLRT 008,006-ACDLAG055RIASBL00003"483"69.BL0005
DAPTALF

DCA-125SSJU SERIES (STANDARD)— PARTS AND OPERATION MANUAL— REV. #4 (06/03/03) — PAGE 19
DCA-125SSJU SERIES —TRAILER SPECIFICATIONS
)t'noC(snoitacificepS.2elbaT
LEDOM RELPUOC SERIT SLEEHW ELXA SBUH NOISNEPSUS LACIRTCELE
W01-RLRT SSALCLLAB"2
ELBATSUJDA2
C31-571"05.4X"312X2#0022GUL5FAEL3MOOLERIW4
/W
TALFELOP4
01-RLRT SSALCLLAB"2
ELBATSUJDA2
C31-571"5.4X"312X2#0022GUL5FAEL3TALFELOP4
FX01-RLRT SSALCLLAB"2
ELBATSUJDA2
C31-571"5.4X"312X2#0022GUL5FAEL3TALFELOP4
W522-RLRT SSALCLLAB"2
ELBATSUJDA2
B31-571"5.4X312X2#0022GUL5XELFQTALFELOP4
WLB-RLRT
004
SSALCLLAB"2
ELBATSUJDA2
C31-571"5.4X312X2#0022GUL5FAEL3TALFELOP4
X05-RLRT SSALCLLAB"2CRL31-87B"05.4X"31.sbl0053
"8/3-2
GUL5FAEL4ELOP4
TALFREBBUR
FX05-RLRT SSALCLLAB"2CRL31-87B"05.4X"31.sbl0053
"8/3-2
GUL5FAEL4ELOP4
TALFREBBUR
W07-RLRT SSALCLLAB"2
ELBATSUJDA"3
C41-502
)4(SAIB
"5X"41.sbl0053
"3
GUL5FAEL5ELOP4
TALFREBBUR
X07-RLRT SSALCLLAB"2
ELBATSUJDA"3
C41-502
)4(SAIB
"5X"41sbl0053
"3
GUL5FAEL5ELOP4
TALFREBBUR
FX07-RLRT SSALCLLAB"2
ELBATSUJDA"3
C41-502
)4(SAIB
"5X"41.sbl0053
"3
GUL5FAEL5ELOP4
TALFREBBUR
FX001-RLRT -2ELBATSUJDA
EYE"3TPO6/5
C51-502
)4(SAIB
"5.5X"41sbl0053
"3
GUL5FAEL5MOOLERIW4
521/58-RLRT -2ELBATSUJDA
EYE"3TPO6/5
D51R57/522TS
)4(LAIDAR
"6x"41sbl0006-)2(GUL6FAEL7MOOLERIW4
FX051-RLRT EYELLAB"3E61-057
)4(SAIB
"7X"61sbl0006-)2(GUL8FAEL7MOOLERIW4
FX022-RLRT EYE"3
ELBATSUJDA
E61R58/532TS
)4(LAIDAR
"7X"61sbl0007-)2(GUL8XELFQMOOLERIW4
FX003-RLRT EYE"3
ELBATSUJDA
E61R58/532TS
)6(LAIDAR
"7X"61sbl0006-)2(GUL8XELFQMOOLERIW4
FX004-RLRT EYE"3
ELBATSUJDA
E61R58/532TS
)6(LAIDAR
"7X"61-bl0007-)3(
.s
GUL8XELFQMOOLERIW4
FX006-RLRT LEEHWHT5H5.71R57/512TS
)8(LAIDAR
"7X"61-l00001-)3(
sb
GUL8FAEL7MOOLERIW6
RA008-RLRT LEEHWHT5H5.71R57/512TS
)8(LAIDAR
"7X"61-l00001-)3(
sb
GUL8EDIR-RIAMOOLERIW6

PAGE 20 — DCA-125SSJU SERIES (STANDARD) — PARTS AND OPERATION MANUAL — REV. #4 (06/03/03)
The DCA-125SSJU Series generator is equipped with a number of safety decals. These decals are provided for operator
safety and maintenance information. The illustration below and on the preceding page show the decals as they appear on
the machine. Should any of these decals become unreadable, replacements can be obtained from your dealer.
DCA-125SSJU SERIES — GENERATOR DECALS