Multiquip DCA125USJ operation manual Battery Cable Installation, Alternator, Wiring

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Battery

This unit is of negative ground DO NOT connect in reverse. Always maintain battery fluid level between the specified marks. Battery life will be shortened, if the fluid level are not properly maintained. Add only distilled water when replenishment is necessary.

DO NOT over fill. Check to see whether the battery cables are loose. Poor contact may result in poor starting or malfunctions. Always keep the terminals firmly tightened. Coating the terminals with an approved battery terminal treatment compound. Replace battery with only recommended type battery. The battery type used in this generator is BCI Group 27.

The battery is sufficiently charged if the specific gravity of the battery fluid is 1.28 (at 68° F). If the specific gravity should fall to 1.245 or lower, it indicates that the battery is dead and needs to be recharged or replaced.

Before charging the battery with an external electric source, be sure to disconnect the battery cables.

Battery Cable Installation

ALWAYS be sure the battery cables (Figure 38) are properly connected to the battery terminals as shown below. The RED cable is connected to the positive terminal of the battery, and the BLACK cable is connected to the negative terminal of the battery.

CAUTION - BATTERY SERVICING SAFETY

ALWAYS disconnect the negative terminal FIRST and reconnect negative terminal LAST.

Figure 38. Battery Connections

DCA-125USJ — PRE-SETUP

When connecting battery do the following:

1.NEVER connect the battery cables to the battery terminals when the MPEC Control Switch is in either the MANUAL position. ALWAYS make sure that the MPEC Control Switch is in the OFF/RESET position when connecting the battery.

2.Place a small amount of battery terminal treatment compound around both battery terminals.This will ensure a good connection and will help prevent corrosion around the battery terminals.

If the battery cable is connected incorrectly, electrical damage to

NOTE the generator will occur. Pay close attention to the polarity of the battery when connecting the battery.

CAUTION - BATTERY SERVICING SAFETY

Inadequate battery connections may cause poor starting of the generator, and create other malfunctions.

Alternator

The polarity of the alternator is negative grounding type. When an inverted circuit connection takes place, the circuit will be in short circuit instantaneously resulting the alternator failure.

DO NOT put water directly on the alternator. Entry of water into the alternator can cause corrision and damage the alternator.

Wiring

Inspect the entire generator for bad or worn electrical wiring or connections. If any wiring or connections are exposed (insulation missing) replace wiring immediately.

Piping and Hose Connection

Inspect all piping, oil hose, and fuel hose connections for wear and tightness.Tighten all hose clamps and check hoses for leaks.

If any hose (fuel or oil) lines are defective replace them immediately.

DCA-125USJ — OPERATION AND PARTS MANUAL — REV. #2 (01/27/11) — PAGE 35

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Contents Model DCA125USJ 2 DCA-125USJ Operation and Parts Manual REV. #2 01/27/11 DCA-125USJ Operation and Parts Manual REV. #2 01/27/11 Table of Contents Ordering parts has never been easier Parts Ordering ProceduresGenerator Specifications DCA-125USJ SpecificationsDimensions DCA-125USJ Dimensions TOP, Side and FrontSafety Messages DCA-125USJ Safety Informationfirst aid kit DCA-125USJ Safety Information„ Always know the location of the nearest fire extinguisherIf operating in speed ranges above the maximum allowable Before servicing equipmentFrom fuel vapors or if fuel is spilled on a hot engine „ Never use fuel as a cleaning agent3ECURE Portable Power Cables in Cable Tray with TIE wraps „ Never use gas piping as an electrical ground Device. All installations should beDCA-125USJ Safety Information DCA-125USJ Generator Decals DCA-125USJ Generator Decals Typical Generator Grounding Application DCA-125USJ InstallationMounting DCA-125USJ InstallationOutdoor Installation Indoor InstallationControl Box DCA-125USJ Series Familiarization GeneratorEngine Operating Panel Generator Control PanelGenerator Major Components DCA-125USJ Major Components20 DCA-125USJ Operation and Parts Manual REV. #2 01/27/11 DCA-125USJ Generator Control Panel DCA-125USJ Engine Operating Panel DCA-125USJ Engine Operating Panel Output Terminal Familiarization DCA-125USJ Output Terminal Panel FamiliarizationTwist Lock Dual Voltage 120/240 VAC Receptacles 120VAC Gfci ReceptaclesBlower Fan Connecting LoadsMotors and motor-driven Single Phase LoadThree Phase Load DCA-125USJ Load ApplicationGfci Receptacle Load Capability Voltage Selector SwitchGenerator OutputVoltages Generator AmperageReading Amperage How to Read the OutputTerminal GaugesDCA-125USJ Gauge Reading 3Ø 208V/1Ø120V Output Terminal Lug Voltages DCA-125USJ Output Terminal Panel ConnectionsUvwo Terminal Output Voltages 3Ø 240/139 Output Terminal Lug Voltages1Ø 240V/120V Output Terminal Lug Voltages 3Ø 480/277 Output Terminal Lug VoltagesFuel Check DCA-125USJ PRE-SETUPCircuit Breakers Lubrication OilRefueling Refueling ProcedureMust be less than 50% Cleaning the RadiatorAir Cleaner Fan Belt Tension Operation FreezingWeatherAlternator BatteryBattery Cable Installation WiringStarting Manual Before StartingEngines exhaust contains harmful emissions Direct exhaust away from nearby personnelFrequency Meter Hz Is placed in the Auto position Starting Auto ModePlace the Mpec Control Switch in the Auto position Emergency Shutdown Procedure Normal Shutdown ProcedureDCA-125USJ Maintenance Replacing Fuel Filter Air RemovalCheck Oil Level Replacing Oil FilterTo ensure adequate starting Battery chargerHydraulic Surge Brakes DCA-125USJ -TRAILER Brakes MaintenanceBrake Adjustment BrakesTire Wear/Inflation Tires/Wheels/Lug NutsSuspension Start all wheel lug nuts by hand DCA-125USJ -TRAILER MaintenanceLug Nut Torque Requirements DCA-125USJ -TRAILERWIRING Diagram Generator Wiring Diagram DCA-125USJ Generatorwiring DiagramDCA-125USJ Enginewiring Diagram DCA-125USJ -TROUBLESHOOTING Generator Engine Controller Troubleshooting Mpec DCA-125USJ -TROUBLESHOOTING Engine ControllerDCA-125USJ Operation and Parts Manual REV. #2 01/27/11 QTY. Column DCA-125USJ Explanation of Code in Remarks ColumnQty Description DCA-125USJ Suggested Spare PartsDCA-125USJ Generator Assy DCA-125USJ Generator Assy DCA-125USJ Control BOX Assy LAF3630010393P M32130007020330000180 060180882358 DCA-125USJ Operation and Parts Manual REV. #2 01/27/11 DCA-125USJ Control BOX Assy DCA-125USJ Engine and Radiator Assy 0602042594 M39232000540602041292 RE504836Engine & Radiator Assy 0603306590 06055151970602022563 0602022561DCA-125USJ Outputterminal Assy DCA-125USJ Outputterminal Assy DCA-125USJ Battery Assy M9103000504 06022201964D-2 M9310500404DCA-125USJ Muffler Assy M3333200304 M33301004020017112030 M3333000903DCA-125USJ Fueltank Assy 0605516090 M33630014020605505070 0605501074Enclosure #1 Assy DCA-125USJ Enclosure #1 Assy0603306797 M3413001812M3363300303 001691003074 DCA-125USJ Operation and Parts Manual REV. #2 01/27/11 25A 0030014000 24A M349320061424A M3493201204 0010114040Enclosure #2 Assy DCA-125USJ Enclosure #2 AssyM3443000904 M3443000802M3443000812 M3493303203DCA-125USJ Rubber Seals Assy 0228900660 02292008700229201130 0229201240DCA-125USJ Nameplate and Decals Assy M15000070 M1550000204M15000020 M1550000703Freight Policy Terms and Conditions of Sale PartsDCA-125USJ Operation and Parts Manual REV. #2 01/27/11 HERE’S HOW to GET Help

DCA125USJ specifications

The Multiquip DCA125USJ is a robust, high-performance generator designed to meet the diverse needs of various industries, including construction, events, and emergency backup. This generator boasts a compact size and impressive output, making it a reliable choice for both temporary and permanent power solutions.

At the heart of the DCA125USJ is a powerful diesel engine, providing an impressive 125 kVA output. This engine is engineered for efficiency, ensuring that the generator can continuously deliver reliable power while maintaining low operational costs. The generator operates at low RPM, which not only extends the engine's lifespan but also reduces noise levels, making it ideal for urban environments and sensitive locations.

One of the standout features of the DCA125USJ is its advanced electronic control system. This technology allows for seamless monitoring and management of the generator's performance, ensuring optimal operation. The control panel is user-friendly, offering real-time data on voltage, frequency, and operating hours, which simplifies maintenance and troubleshooting.

The DCA125USJ is equipped with a sturdy, weather-resistant enclosure that protects it from the elements, making it suitable for outdoor applications. This enclosure also contributes to noise reduction, ensuring quieter operation compared to traditional generators. Additionally, its compact design allows for easy transport and installation, making it a versatile option for various job sites.

Safety is a top priority in the design of the DCA125USJ. It features multiple safety mechanisms, such as an automatic shut-off system that activates in the event of low oil pressure or overheating, protecting the generator and prolonging its operational life.

Moreover, the DCA125USJ is compliant with rigorous emissions standards, making it an environmentally responsible choice. It offers options for multiple voltage outputs, which adds to its adaptability for different applications, from powering heavy machinery to providing electricity for small tools.

In summary, the Multiquip DCA125USJ stands out for its powerful diesel engine, state-of-the-art electronic controls, robust construction, and focus on safety and efficiency. Whether used in construction, outdoor events, or as a backup power source, the DCA125USJ is engineered to deliver reliable performance in a user-friendly package. This makes it a top contender for anyone needing dependable generator capabilities.
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