Multiquip DCA25SSIU User Manual

OPERATION AND PARTS MANUAL

®

MODEL DCA25SSIU

WHISPERWATT™ GENERATOR

(Standard)

Revision #7 (04/18/12)

To find the latest revision of this publication, visit our website at: www.mqpower.com

THIS MANUAL MUST ACCOMPANYTHE EQUIPMENT AT ALLTIMES.

PAGE 2 — DCA-25SSIU — PARTS AND OPERATION MANUAL(STD) — REV. #7 (04/18//12)

PAGE 3 — DCA-25SSIU — PARTS AND OPERATION MANUAL (STD) — REV. #7 (04/18/12)

Table Of Contents .......................................................	4
Parts Ordering Procedures .........................................	5
Rules for Safe Operation .........................................	6-9
Towing and Transportation ........................................	10
Trailer Safety Guidelines ......................................	11-15
Trailer Wiring Diagram ...............................................	16
Operation Decals .................................................	17-18
DCA-25SSIU Specifications .....................................	19
General Information ..................................................	20
Major Components ...................................................	21
Dimensions...............................................................	22
Control Panel Descriptions ..................................	24-25
Engine Operating Panel Descriptions ..................	26-27
Output Terminal Panel Descriptions .....................	28-29
Output Amerage Setup ........................................	30-31
Output Voltage Setup...........................................	32-35
Installation ...........................................................	36-37
Pre Setup ............................................................	38-41
Load Application .......................................................	42
Generator Start-up Procedure .............................	43-45
Generator Shutdown Procedure ................................	46
Maintenance ........................................................	47-48
Generator Wiring Diagram .........................................	50
Engine Wiring Diagram .............................................	51
EngineTroubleshooting ........................................	52-53
Generator/EngineTroubleshooting ............................	54
Explanation of Codes in Remarks Column ...............	56
Suggested Spare Parts ............................................	57

TABLE OF CONTENTS

ISUZU C240 ENGINE

Cylinder Head and Cover Assembly ....................	86-87
Cylinder Block Assembly ....................................	88-89
Timing Gear Assembly ........................................	90-91
Flywheel Housing Assembly ...............................	92-93
Oil Pan Assembly ................................................	94-95
Oil Pump Assembly ............................................	96-97
Crankshaft, Bridge and Flywheel Assembly ........	98-99
Oil and Fuel Filter Assembly ...........................	100-101
Oil Pipe Assembly ...........................................	102-103
Water Pump and Fan Assembly ......................	104-105
Intake and Exhaust Manifold Assembly ..........	106-107
Air Cleaner Assembly ......................................	108-109
Engine Foot Assembly ....................................	110-111
Injection Pump Assembly ...............................	112-113
Electrical Parts Assembly ...............................	114-115
Accessories ....................................................	116-117
Injection Pump Comp. Assembly ....................	118-121
Governor Comp. Assembly..............................	122-127
Feed Pump Comp. Assembly ..........................	128-129
Auto Timer Assembly ......................................	130-131
Nozzle Holder Comp. Assembly ......................	132-133
Starter Comp. Assembly .................................	134-135
Alternator Comp. Assembly .............................	136-139
Terms and Conditions of Sales ..............................	140

MQ POWER DCA-25SSIU AC GENERATOR

Generator Assembly ............................................	58-59
Control Box Assembly .........................................	60-61
Engine & Radiator Assembly...............................	62-67
Engine Operating Panel Assembly ......................	68-69
Output Terminal Assembly ...................................	70-71
Battery Assembly ................................................	72-73
Muffler Assembly ................................................	74-75
Fuel Tank Assembly ............................................	76-77
Enclosure Assembly ...........................................	78-81
Rubber Seal Assembly ........................................	82-83
Name Plate And Decals ......................................	84-85

NOTE

Specification and part number are subject to change without notice.

PAGE 4 — DCA-25SSIU — PARTS AND OPERATION MANUAL(STD) — REV. #7 (04/18//12)

www.multiquip.com

PARTS ORDERING PROCEDURES

Ordering parts has never been easier!

Choose from three easy options:

Effective:

January 1st, 2006

Best Deal! Order via Internet (Dealers Only):

If you have an MQ Account, to obtain a Username

Order parts on-line using Multiquip’s SmartEquip website!

and Password, E-mail us at: parts@multiquip.

■ View Parts Diagrams

com.

■ Order Parts

To obtain an MQ Account, contact your

■ Print Specification Information

District Sales Manager for more information.

Goto www.multiquip.com and click on

Use the internet and qualify for a 5% Discount

on Standard orders for all orders which include

Order

Parts

to log in and save!

complete part numbers.*

Note: Discounts Are Subject To Change

Order via Fax (Dealers Only):

Fax your order in and qualify for a 2% Discount

All customers are welcome to order parts via Fax.

on Standard orders for all orders which include

Domestic (US) Customers dial:

complete part numbers.*

1-800-6-PARTS-7 (800-672-7877)

Note: Discounts Are Subject To Change

Order via Phone: Domestic (US) Dealers Call:

1-800-427-1244

Non-Dealer Customers:

International Customers should contact

Contact your local Multiquip Dealer for

their local Multiquip Representatives for

parts or call 800-427-1244 for help in

Parts Ordering information.

locating a dealer near you.

When ordering parts, please supply:

	Dealer Account Number	Specify Preferred Method of Shipment:
	Dealer Name and Address	UPS/Fed Ex	DHL
	Shipping Address (if different than billing address)	Priority One	Truck
	Return Fax Number	Ground
		Next Day
	Applicable Model Number
		Second/Third Day

Quantity, Part Number and Description of Each Part

NOTICE

All orders are treated as Standard Orders and will ship the same day if received prior to 3PM PST.

WE ACCEPT ALL MAJOR CREDIT CARDS!

PAGE 5 — DCA-25SSIU — PARTS AND OPERATION MANUAL (STD) — REV. #7 (04/18/12)

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-25SSIU portable generator:

GENERAL SAFETY

■DONOToperateorservicethisequipmentbefore readingthisentiremanual.

■This equipment should not be operated by persons under 18 years of age.

■NEVER operate this equipment without proper protective clothing, shatterproof glasses, steeltoed boots and other protective devices required by the job.

■NEVERoperatethisequipmentwhennotfeeling 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.

■Manufacturer 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.

RULES FOR SAFE OPERATION

■NEVER touch the hot exhaust manifold, muffler or cylinder. Allow these parts to cool before servicing engine or generator.

■High Temperatures – Allow the engine to cool before adding fuel or 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.

CAUTION:

■Always refuel in a well-ventilated area, away from sparks and open flames.

■Always use extreme caution when working with flammable liquids. When refueling, stop the engine and allow it to cool. DO NOT smoke around or near the machine. Fire or explosion could result from fuel vapors, or if fuel is spilled on a hot engine.

■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.

■Topping-off to filler port is dangerous, as it tends to spill fuel.

PAGE 6 — DCA-25SSIU — PARTS AND OPERATION MANUAL(STD) — REV. #7 (04/18//12)

RULES FOR SAFE OPERATION

CAUTION:

■NEVER touch output terminals during operation. This is extremely dangerous. Always stop the machine when contact with the output terminals is required.

CAUTION:

■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.

CAUTION:

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.

Fluid Plugs

1.Radiator Cap - Removing the radiator cap while the engine is hot, will result in high pressurized, boiling water to spew 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 flow out of the coolant drain plug, therefore causing severe scalding to any persons in the general area of the generator.

■Never use damaged or worn cables when connecting power tools or 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.

3.Engine Oil Drain Plug - Removing the engine oil drain plug while the engine is hot will result in hot oil to flow out of the oil drain plug, therefore causing severe scalding to any persons in the general area of the generator.

PAGE 7 — DCA-25SSIU — PARTS AND OPERATION MANUAL (STD) — REV. #7 (04/18/12)

RULES FOR SAFE OPERATION

Battery

CAUTION:

Never over fill the battery with water above the upper limit.

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 booster cables in good working condition. Repair or replace all worn cables.

5.Always recharge the battery in an open 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.

■NEVER Run engine without air filter. Severe engine damage may occur.

■Always service air cleaner frequently to prevent carburetor malfunction.

■Always disconnect the battery before performing service on the generator.

■Always be sure the operator is familiar with proper safety precaution s and operations techniques before using generator.

■Always store equipment properly when not in use.

Equipment should be stored in a clean, dry location out of the reach of children.

■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 Isuzu Engine Owner's Manual for engine technical questions or information.

Loading and Unloading (Crane)

■Before lifting, make sure the generator's lifting hook is secure and that there is no apparent damage to the generator itself (loose screws, nuts and bolts). If any part is loose or damaged, please take corrective action before lifting.

■Always drain fuel prior to lifting.

■Always make sure crane or lifting device has been properly secured to the hook of guard frame on generator.

■NEVER lift the machine while the engine is running.

■Use adequate lifting cable (wire or rope) of sufficient strength.

■When lifting the generator, always use the balanced center-point suspension hook and lift straight upwards.

■NEVER allow any person or animal to stand underneath the machine while lifting.

■When loading the generator on a truck, be sure to use the front and back frame bars as a means to secure the generator during transport.

PAGE 8 — DCA-25SSIU — PARTS AND OPERATION MANUAL(STD) — REV. #7 (04/18//12)

RULES FOR SAFE OPERATION

Transporting

■Always shutdown engine before transporting.

■Tighten fuel tank cap securely.

■Drain fuel when transporting generator over long distances or rough terrains.

■Always tie-down the generator during transportation by securing the generator.

■If generator is mounted on a trailer, make sure trailer complies with all local and state safety transportation laws. See page 10 for basic towing procedures.

Emergencies

■Always know the location of the nearest fire extinguisher and first aid kit. Know the location of the nearest telephone.

Also know the phone numbers of the nearest ambulance, doctor and fire department.

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.

■Dispose of hazardous waste properly. Examples of potentially hazardous waste are used motor oil, coolant, fuel, and fuel filters.

■DO NOT use plastic containers to dispose of hazardous waste.

■DO NOT pour waste, oil, coolant or fuel directly onto the ground, down a drain or into any water source.

PAGE 9 — DCA-25SSIU — PARTS AND OPERATION MANUAL (STD) — REV. #7 (04/18/12)

DCA-25SSIU —TOWING RULES FOR SAFE OPERATION

Towing Safety Precautions

CAUTION :

Check with your county or state safety towing regulations department before towing your generator.

To reduce the possibility of an accident while transporting the generator on public roads, always make sure the trailer (Figure 1) 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).

■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".

■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 unless otherwise posted for highway towing is 55 MPH. It is not recommended for off-road towing. However, if necessary, do not exceed 15 MPH or less depending on type of terrain to prevent damage to the axles.

■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 1. Generator with Trailer

PAGE 10 — DCA-25SSIU — PARTS AND OPERATION MANUAL(STD) — REV. #7 (04/18//12)

DCA-25SSIU — TRAILER-SAFETY GUIDELINES

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.

Explanation of Chart:

This section is intended 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 ensure 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 maintenance components of the trailer. The following trailer components will be discussed in this section:

Tires

Lug Nut Torquing

Suspension

Electrical

Use the following definitions with reading Table 1.

1.Fuel Cell - Provides an adequate amount of fuel for the equipment in use. Fuel cells must be empty when transporting equipment.

2.Braking System - System employed in stopping the trailer. Typical braking systems are electric, surge, hydraulic, hydraulic-surge and air.

3.GVWR- Gross Vehicle Weight Rating (GVWR), is the maximum number of pounds the trailer can carry, including the fuel cell (empty).

4.Frame Length - This measurement is from the ball hitch to the rear bumper (reflector).

5.Frame Width - This 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 4 and Figure 5 or lug nut tightening and sequence.

13.Axle - Indicates the maximum weight the axle can support in pounds, and the diameter of the axle expressed in inches (see Table 3). 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 11 — DCA-25SSIU — PARTS AND OPERATION MANUAL (STD) — REV. #7 (04/18/12)

DCA-25SSIU —TRAILER-SPECIFICATIONS

Table 1. Specifications

MODEL	APPLICATION	FUEL	BRAKE	GVWR	FRAME	FRAME	JACK
		CELL	SYSTEM		LENGTH	WIDTH	STAND
TRLR-10W	SDW225,	NO	NO	1900LBS	96"	50"	800LB.
	SGW250,TLW300						FULL TILT WHEEL
TRLR-10	DCA10, TLG12,	NO	NO	1900LBS	96"	50"	800LB.
	DCA-15						FULL TILT WHEEL
TRLR-10XF	DCA10, TLG-12,	52 GAL	NO	1900LBS	96"	50"	800LB.
	DCA15, TLW-300						FULL TILT WHEEL
TRLR-225W	WELDERS,	NO	NO	2200LBS	85"	42"	800LB.
	DA7000SS						FULL TILT WHEEL
TRLR-BLW400	BLW-400	NO	ELECTRIC	2700LBS	W/MAST 154"	55"	800LB.
					W/O 124"	(78" TALL)	FULL TILT WHEEL
TRLR-50X	DCA-25	NO	NO	2700LBS	124"	55"	800LB.
							FULL TILT WHEEL
TRLR-50XF	DCA-25	41 GAL	NO	2700LBS	124"	55"	800LB.
							FULL TILT WHEEL
TRLR-70W	DCA-45, -60, 70	NO	SURGE	7000LBS	186"	77"	2000LB.
							FLAT PAD
TRLR-70X	DCA-45, -60, 70	OPT	SURGE	7000LBS	138"	66"	2000LB.
							FLAT PAD
TRLR-70XF	DCA-45, -60, 70	53 GAL	SURGE	7000LBS	138"	66"	2000LB.
							FLAT PAD
TRLR-100XF	DCA-100, 125	150 GAL	HYDRAULIC SURGE	7000LBS	190"	76"	2000LB.
							FLAT PAD
TRLR-85/125	DCA-85, 100,	145 GAL	HYDRAULIC	10000LBS	186"	77"	2000LB.
	125						FLAT PAD
TRLR-150XF	DCA-150, 180	200 GAL	HYDRAULIC SURGE	11160LBS	204"	84"	5000 LB.
							FLAT PAD
TRLR-220XF	DCA-220	250 GAL	HYDRAULIC SURGE	14000LBS	222"	83"	5000 LB.
							FLAT PAD
TRLR-300XF	DCA-300	250 GAL	HYDRAULIC SURGE	18000LBS	238"	83"	5000 LB.
							FLAT PAD
TRLR-400XF	DCA-400	350 GAL	ELECTRIC	18000LBS	238"	83"	5000 LB.
							FLAT PAD
TRLR-600XF	DCA-600, 800	550 GAL	AIR	30000LBS	384"	96"	5000 LB.
							FLAT PAD
TRLR-800SX	DCA-600, 800	550 GAL	AIR	30000LBS	384"	96"	5000 LB.
							FLAT PAD

PAGE 12 — DCA-25SSIU — PARTS AND OPERATION MANUAL(STD) — REV. #7 (04/18//12)

DCA-25SSIU —TRAILER-SPECIFICATIONS

Table 1. Specifications (Con't)

MODEL	COUPLER	TIRES	WHEELS	AXLE	HUBS	SUSPENSION	ELECTRICAL
TRLR-10W	2" BALL CLASS	175-13C	13"X4.50"	2200# 2X2	5 LUG	3 LEAF	4 WIRE LOOM W/
	2 ADJUSTABLE						4 POLE FLAT
TRLR-10	2"BALL CLASS	175-13C	13"X4.5"	2200#2X2	5 LUG	3 LEAF	4 POLE FLAT
	2 ADJUSTABLE
TRLR-10XF	2"BALL CLASS	175-13C	13"X4.5"	2200#2X2	5 LUG	3 LEAF	4 POLE FLAT
	2 ADJUSTABLE
TRLR-225W	2"BALL CLASS	175-13B	13X4.5"	2200#2X2	5 LUG	Q FLEX	4 POLE FLAT
	2 ADJUSTABLE
TRLR-BLW	2"BALL CLASS	175-13C	13 X 4.5"	2200#2X2	5 LUG	3 LEAF	4 POLE FLAT
400	2 ADJUSTABLE
TRLR-50X	2" BALL CLASS	B78-13LRC	13"X4.50"	3500lbs.	5 LUG	4 LEAF	4 POLE RUBBER
				2-3/8"			FLAT
TRLR-50XF	2" BALL CLASS	B78-13LRC	13"X4.50"	3500lbs.	5 LUG	4 LEAF	4 POLE RUBBER
				2-3/8"			FLAT
TRLR-70W	2" BALL CLASS	205-14C	14"X5"	3500lbs.	5 LUG	5 LEAF	4 POLE RUBBER
	3" ADJUSTABLE	BIAS (4)		3"			FLAT
TRLR-70X	2" BALL CLASS	205-14C	14"X5"	3500lbs	5 LUG	5 LEAF	4 POLE RUBBER
	3" ADJUSTABLE	BIAS (4)		3"			FLAT
TRLR-70XF	2" BALL CLASS	205-14C	14"X5"	3500lbs.	5 LUG	5 LEAF	4 POLE RUBBER
	3" ADJUSTABLE	BIAS (4)		3"			FLAT
TRLR-100XF	ADJUSTABLE 2-5/6	205-15C	14"X5.5"	3500lbs	5 LUG	5 LEAF	4 WIRE LOOM
	OPT 3" EYE	BIAS (4)		3"
TRLR-85/125	ADJUSTABLE 2-5/6	ST225/75R15D	14"x6"	(2)-6000lbs	6 LUG	7 LEAF	4 WIRE LOOM
	OPT 3" EYE	RADIAL (4)
TRLR-150XF	3" BALL EYE	750-16 E	16"X7"	(2)-6000lbs	8 LUG	7 LEAF	4 WIRE LOOM
		BIAS (4)
TRLR-220XF	3" EYE	ST235/85R16E	16"X7"	(2)-7000lbs	8 LUG	Q FLEX	4 WIRE LOOM
	ADJUSTABLE	RADIAL(4)
TRLR-300XF	3" EYE	ST235/85R16E	16"X7"	(2)-6000lbs	8 LUG	Q FLEX	4 WIRE LOOM
	ADJUSTABLE	RADIAL(6)
TRLR-400XF	3" EYE	ST235/85R16E	16"X7"	(3)-7000lbs.	8 LUG	Q FLEX	4 WIRE LOOM
	ADJUSTABLE	RADIAL(6)
TRLR-600XF	5TH WHEEL	ST215/75R17.5H	16"X7"	(3)-10000lbs	8 LUG	7 LEAF	6 WIRE LOOM
		RADIAL (8)
TRLR-800AR	5TH WHEEL	ST215/75R17.5H	16"X7"	(3)-10000lbs	8 LUG	AIR-RIDE	6 WIRE LOOM
		RADIAL (8)

PAGE 13 — DCA-25SSIU — PARTS AND OPERATION MANUAL (STD) — REV. #7 (04/18/12)

DCA-25SSIU —TRAILER SAFETY GUIDELINES

Tires/Wheels/Lug Nuts

Tires and wheels are a very important and critical components of the trailer. When specifying or replacing the trailer wheels it is important the wheels, tires, and axle are properly matched.

CAUTION:

DO NOT attempt to repair or modify a wheel. DO NOT install in inner tube to correct a leak through the rim. If the rim is cracked, the

air pressure in the inner tube may cause pieces of the rim to

explode (break off) with great force and cause serious eye or bodily injury.

Tire Wear/Inflation

Tire inflation pressure is the most important factor in tire life. Pressure should be checked cold before operation. DO NOT bleed air from tires when they are hot. Check inflation pressure weekly during use to insure the maximum tire life and tread wear.

Table 2 (Tire Wear Troubleshooting) will help pinpoint the causes and solutions of tire wear problems.

CAUTION:

Suspension

The leaf suspension springs and associated components (Figure 2) should be visually inspected every 6,000 miles for signs of excessive wear, elongation of bolt holes, and loosening of fasteners. Replace all damaged parts (suspension) immediately. Torqued suspension components as detailed in Table 3.

Figure 2. Major Suspension Components

NOTE

ALWAYS wear safety glasses when removing or installing force fitted parts. Failure to comply may result in serious injury.

PAGE 14 — DCA-25SSIU — PARTS AND OPERATION MANUAL(STD) — REV. #7 (04/18//12)

DCA-25SSIU —TRAILER SAFETY GUIDELINES

Table 3. Suspension Torque Requirements

Item	Torque (Ft.-Lbs.)
3/8" U-BOLT	MIN-30 MAX-35
7/16" U-BOLT	MIN-45 MAX-60
1/2" U-BOLT	MIN-45 MAX-60
SHACKLE BOLT	SNUG FIT ONLY. PARTS MUST ROTATE FREELY.
SPRING EYE BOLT	LOCKING NUTS OR COTTER PINS ARE PROVIDED TO
	RETAIN NUT-BOLT ASSEMBLY.
SHOULDER TYPE	MIN-30 MAX-50
SHACKLE BOLT

Lug NutTorque Requirements

It is extremely important to apply and maintain proper wheel mounting torque on the trailer. Be sure to use only the fasteners matched to the cone angle of the wheel. Proper procedure for attachment of the wheels is as follows:

1.Start all wheel lug nuts by hand.

2.Torque all lug nuts in sequence. See Figure 3. DO NOT torque the wheel lug nuts all the way down. Tighten each lug nut in 3 separate passes as defined by Table 4.

3.After first road use, retorque all lug nuts in sequence. Check all wheel lug nuts periodically.

	Table 4. Tire Torque Requirements
	Wheel Size	First Pass	Second Pass	Third Pass
		FT-LBS	FT-LBS	FT-LBS
	12"	20-25	35-40	50-65
	13"	20-25	35-40	50-65
	14"	20-25	50-60	90-120
					Figure 3. Wheel Lug Nuts Tightening Sequence
	15"	20-25	50-60	90-120
	16"	20-25	50-60	90-120			NOTE
							NEVER use an pneumatic air gun to
							tighten wheel lug nuts.

PAGE 15 — DCA-25SSIU — PARTS AND OPERATION MANUAL (STD) — REV. #7 (04/18/12)

DCA-25SSIU —TRAILER-WIRING DIAGRAM

NOTE:

LIGHTS ARE ORIENTED FROM THE DRIVER’S SEAT

PAGE 16 — DCA-25SSIU — PARTS AND OPERATION MANUAL(STD) — REV. #7 (04/18//12)

DCA-25SSIU — GENERATOR DECALS

The DCA-25SSIU 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 pages show the decals as they appear on the machine. Should any of these decals become unreadable, replacements can be obtained from your dealer.

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DCA-25SSIU — GENERATOR DECALS

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		DCA-25SSIU — SPECIFICATIONS
		Table 5. Specifications
		Generator Specifications
	Model	DCA-25SSIU
	Type	Revolving field, self ventilated, open protected type synchronous
	Armature Connection	Star with Neutral		Zig Zag
	Phase	3		Single
	Standby Output	26.5 KVA (21.2 KW)		15.3KW
	Prime Output	25 KVA (20 KW)		14.4KW
	Voltage	240V or 480V		240/120V
	Frequency			60 Hz
	Speed		1800 rpm
	Power Factor	0.8		1
	Aux. AC Power	Single Phase, 60 Hz
	Voltage			120 V
	Output	4.8 KW (2.4 KW x 2)
		Engine Specifications
	Model	Isuzu QD-6(C240)
	Type	4 Cycle, water-cooled, swirl combustion chamber
	No. of Cylinders		4 cylinders
	Bore x Stroke	3.38 in. x 4 in. (86 mm x 102 mm)
	Rated Output	30.6HP/1800 rpm
	Displacement	144 cu. in. (2369cc)
	Starting		Electric
	Coolant Capacity	2.9 gal. (11 liters)
	Lube Oil Capacity	1.45 gal. (5.5 liters)
	Fuel Consumption	1.65 gal. (6.3L)/hr at full load		1.3 gal. (5.0L)/hr at 3/4 load
		0.9 gal. (3.4L)/hr at 1/2 load		0.6 gal. (2.3L)/hr at 1/4 load
	Battery		12V70AH
	Fuel	#2 Diesel Fuel

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DCA-25SSIU — GENERAL INFORMATION

DCA-25SSIU FAMILIARIZATION

Generator

The MQ Power Model DCA-25SSIU is a 20 kW generator that is designed as a high quality portable (requires a trailer for transport) power source for telecom sites, lighting facilities, power tools, submersible pumps and other industrial and construction machinery.

Engine Operating Panel

The “Engine Operating Panel” is provided with the following:

Tachometer

WaterTemperature Gauge

Oil Pressure Gauge

Charging Ammeter Gauge

Fuel level gauge

Engine Throttle Lever

Pre-Heat Light

Alarm Lights

Panel Light

Panel Light Switch

Starter Switch

Generator Control Panel

The “Generator Control Panel” is provided with the following:

Output Voltage Adjustment Knob

Frequency Meter (Hz)

AC Ammeter (Amps)

AC Voltmeter (Volts)

Ammeter Change-Over Switch

Voltmeter Change-Over Switch

Main Circuit Breaker 60 amps

Over-Current Relay

Output Terminal Panel

The “Output Terminal Panel” is provided with the following:

Three 120V output receptacles, 50 amp

Two 120V output receptacles, 20 amp

3 Circuit Breakers 240V @65 amps

2 GFCI Circuit Breakers 120V@ 20amps

Open Delta Excitation System

The DCA-25SSIU generator is equipped with the state of the art "Open-Delta" excitation system. The open delta system consist of an electrically independent winding wound among stationary windings of the AC output section.

There are four leads: A, B, C and D. During light loads, the power to the AutomaticVoltage Regulator (AVR) is supplied from the leads parallel connections of B&C. When loads increase, the AVR switches and accepts power from leads

A&D. The output of leads A&D increase proportionally with load. This of adding the voltages to each phase provides better voltage response during heavy loads.

The connections of the AVR to the AC output windings are for sensing only. No power is required from these windings.

The open-delta design provides virtually unlimited excitation current, offering maximum motor starting capabilities. The excitation does not have a "fixed ceiling" and responds according the demands of the required load.

Engine

The DCA-25SSIU is powered by a 4 cycle, water cooled, turbocharged Isuzu QD60(C640) diesel engine.This engine is designed to meet every performance requirement for the generator. Reference Table 5, page 19 for engine specifications.

In keeping with MQ Power’s policy of constantly improving its products, the specifications quoted herein are subject to change without prior notice.

The basic controls and indicators for the DCA-25SSIU generator are addressed on the following pages.

Mechanical Governor System

The mechanical governor system control the RPM of the engine. When the engine demands increase or decrease, the mechanical governor system regulates the frequency to ±5%. The electronic governor option limits frequency fluctuation to ±0.25%.

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DCA-25SSIU — MAJOR COMPONENTS

Figure 4. Major Components

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DCA-25SSIU — DIMENSIONS (TOP, SIDE AND FRONT)

Figure 5. Dimensions

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NOTE PAGE

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DCA-25SSIU — CONTROL PANEL

Figure 6. Control Panel

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DCA-25SSIU — CONTROL PANEL

The definitions below describe the controls and functions of the DCA-25SSIU " Control Panel " (Figure 6).

1.Main Circuit Breaker – This three-pole, 60 Amp main breaker is provided to protect the UNV voltage output terminals from overload.

2.Frequency Meter – Indicates the output frequency in hertz (Hz). Normally 63 Hz ±0.5 Hz .

3.AC Ammeter – Indicates the amount of current the load is drawing from the generator.

4.AC Voltmeter – Indicates the output voltage present at the UVW or output terminals.

5.Voltage Regulator Control – Allows manual adjustment of the generator’s output voltage.

6.Ammeter Change-Over Switch – This switch allows the AC ammeter to indicate the current flowing to the load connected to any phase of the output terminals, or to be switched off.

7.Voltmeter Change-Over Switch – This switch allows the AC voltmeter to indicate phase to phase voltage between any two phases of the output terminals or to be switched off.

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DCA-25SSIU — ENGINE OPERATING PANEL

Figure 7. Engine Operating Panel

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DCA-25SSIU — ENGINE OPERATING PANEL

The definitions below describe the controls and functions of the DCA-25SSIU " Engine Operating Panel " (Figure 7).

1.Panel light - Normally used in dark places or at night.

When activated, panel will luminate. When the generator is not in use, turn the panel light switch to the ‘OFF’ position.

2.Oil Pressure Lamp - This light will luminate if the oil pressure exceeds 15 psi and will shut off the engine.

3.Water Temperature Lamp - This light will luminate if the water temperature exceeds 215oF and will shut off the engine.

4.Panel light switch- When activated, will turn on control panel light.

5.Pre-Heat Indicator - This light will luminate once the engine is warmed to an operating temperature.

6.Ignition Switch - This switch is used with a key to start, preheat, and stop the engine..

7.Engine Throttle Lever - To change the speed of the engine from idle to high, pull and turn the handle.

8.Tachometer – Indicates engine speed in RPM’s for 60

Hz operation. This meter should indicate 1800 RPM’s when the rated load is applied. In addition a built in hour meter will record the number of operational hours that the generator has been in use.

9.Fuel Gauge - Indicates amount of diesel fuel available

10.Charging Ammeter Gauge – Indicates the current being supplied by the engine’s alternator which provides current for generator’s control circuits and battery charging system.

11.WaterTemperature Gauge – During normal operation this gauge be should read between 165o to 203oF.

12.Oil Pressure Gauge – Normal operation should be about 42~71 psi. When starting the generator the oil pressure may read a bit higher, but after the engine warms up the oil pressure should return to normal.

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DCA-25SSIU — OUTPUTTERMINAL PANEL

Output Terminal Panel

The output control panel is located on the rear (control panel) end of the generator. The UVW lugs are protected by a face plate cover that can be secured in the close position by a pad lock.

120Volt Receptacle

One GFCI Duplex NEMA 5-20R (120V, 20 Amp) receptacle is located on the output terminal. This receptacle can be used anytime the generator is in operation. The receptacle is controlled by the circuit breaker located on the control panel.

The reset button will reset the receptacle after being tripped. Pressing the "Test Button" (See Figure 8) in the center of this receptacle will check the GFCI function. The receptacle should be tested at least once a month.

Connecting Load

Loads can be connected to the generator by the UVW Lugs or the duplex receptacle. (See Figure 9). Make sure to read the operation manual before attempting to connect a load to the generator.

Figure 9. Connecting Loads

CircuitBreakers

To protect the generator from an overload, a 3-pole, 60 amp, main circuit breaker is provided to protect the UVWO output terminals from overload. In addition two single-pole, 20 amp

GFCI circuit breakers are provided to protect the GFCI receptacles from overload. Three 50 amp circuit breakers have also been provided to protect the load side of the generator from overload. Make sure to switch ALL circuit breakers to the "OFF" position prior to starting the engine.

Figure 8. GFCI Test Button	Maximum Output
	The entire load connected to the UVW l ugs and all four slots in
	the duplex receptacle must not exceed 22 kW in standby or 20
	kW in prime output.
	120V Receptacles - These receptacles can be used
	anytime the generator is in operation. They are controlled
	by the circuit breakers above them.
	Twist Lock Dual Voltage Receptacles - To use these
	receptacles, place the voltage selector switch in the single
	phase 240/120 voltage position and adjust the output
	voltage to 240 volts with the voltage regulator on the
	control panel (see Figure 6, page 24). Place the voltmeter
	change-over switch to the U-W position and the ammeter
	change-over switch to the U or W to read the output.

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DCA-25SSIU — OUTPUTTERMINAL PANEL

NOTE

Legs “O” and Ground are considered Bonded Grounds.

Figure 10. Output Terminal Description

PAGE 29 — DCA-25SSIU — PARTS AND OPERATION MANUAL (STD) — REV. #7 (04/18/12)

DCA-25SSIU — OUTPUT AMPERAGE SETUP

Output Terminal Panel Available Voltages

A wide range of voltages are available to supply load to many different applications. Voltages may be selected by using the voltage selector switch and depending how you hookup your hard wire connection to the generator. To obtain voltages listed, fine adjustment with the voltage regulator on the control panel is necessary. See the table below (Table 6) for a list of available voltages the generator is able to supply.

Over Current Relay

An over current relay is connected to the circuit breaker. During an over current situation, both the circuit breaker and the over current relay may trip. If the circuit breaker can not be reset, the reset button on the over current relay must be pressed. The over current relay is located inside the control box.

Table 6. Voltage Available

	3 Phase	208 VOLT	220 VOLT	240 VOLT	416 VOLT	440 VOLT	480 VOLT
	(Switchable)
	Single Phase	120 VOLT	127 VOLT	139 VOLT	240 VOLT	254 VOLT	277 VOLT
	(Switchable)

CAUTION :

NEVER switch the voltage selector switch position while the engine is engaged.

Voltage Selector Switch Locking Button

The voltage selector switch has a locking button to protect the generator and generator load from being switched while the engine is running. To lock the voltage selector switch, press in the red button located on the lower part of the voltage selector switch, and use a pad lock to hold it into this position.

Maximum Amps

The following table show the maximum amps the entire generator can provide. Do not exceed the maximum amps listed. (See Table 7)

Table 7. Maximum Amps

Rated Voltage Maximum Amps

Single Phase

55.5 amps (4 wire)

120 Volt

Single Phase

27.8 amps (4 wire)

240 Volt

Three Phase

60 amps

240 Volt

Three Phase

30 amps

480 Volt

PAGE 30 — DCA-25SSIU — PARTS AND OPERATION MANUAL(STD) — REV. #7 (04/18//12)