Product Overview
The DB Electrical 400-48012 Alternator is a high-quality aftermarket replacement component designed to meet OEM specifications. This 24-volt, 30-amp alternator is engineered for reliable performance in compatible Mitsubishi engines and Kobelco excavators, ensuring consistent power generation for your vehicle's electrical system.
Image: Front view of the DB Electrical 400-48012 Alternator, showcasing its main body and mounting points.
Specifications
| Attribute | Value |
|---|---|
| Unit Type | Alternator |
| Voltage | 24 Volts |
| Amperage | 30 Amps |
| Rotation | CW (Clockwise) |
| Clock Position | 3 |
| Pulley Class | V2 |
| Regulator Type | IR (Internal Regulator) |
| Fan Type | EF (External Fan) |
| Item Weight | 10.56 pounds |
| Product Dimensions | 5.73 x 4.64 x 5.19 inches |
Compatibility
This alternator is compatible with and serves as a replacement for various applications. Please verify part fitment before purchase.
Compatible With/Replacement For:
- KOBELCO: SK200 Excavator
- MITSUBISHI Engines: 6D1, 6D2, 6D31 (85-On, 86-On)
Replaces OEM Numbers:
- ARROWHEAD: AMT0239, 400-48012
- ARROWHEAD (OEM): A2T72999, ND210-9013
- ARROWHEAD (OEM) (OLD): A2T72986, A2T72987
- CARGO: 113196
- J & N: 400-48012
- J & N (OLD): 400-48012R
- LESTER: 12308
- MITSUBISHI: A2T72986, A2T72987, A2T72999
- MITSUBISHI INDUSTRIAL: ME049175, ME070120, ME087508
- WAI: 12308N
Installation and Setup
Installation of an alternator requires mechanical expertise and proper tools. It is highly recommended that installation be performed by a qualified professional to ensure correct fitment, wiring, and safe operation.
General Installation Guidelines (Professional Installation Recommended):
- Safety First: Disconnect the vehicle's battery before beginning any work on the electrical system.
- Access: Locate the existing alternator and identify all electrical connections and mounting bolts.
- Removal: Carefully disconnect all wiring (battery, ignition, sense wires) and remove the drive belt. Unbolt the old alternator from its mounting brackets.
- Comparison: Compare the new DB Electrical alternator with the old unit to ensure they match in terms of mounting points, pulley type, and electrical connections.
- Installation: Mount the new alternator securely using the appropriate bolts. Reinstall the drive belt and adjust tension according to manufacturer specifications.
- Wiring: Reconnect all electrical wires to the new alternator. Ensure all connections are clean, tight, and correctly polarized. Refer to the vehicle's service manual for specific wiring diagrams if needed.
- Battery Reconnection: Reconnect the vehicle's battery.
- Testing: Start the engine and check the charging system. Verify that the battery warning light is off and that the alternator is producing the correct voltage (typically 13.8-14.8 volts at the battery terminals with the engine running).
Image: Side view of the alternator, showing the mounting bracket and electrical connection points.
Image: Diagram illustrating the electrical connector pinout, labeled (IGN) R, I, L, which are common terminals for alternator wiring.
Operating Principles
The alternator is a key component of your vehicle's charging system. Once installed and the engine is running, the alternator converts mechanical energy from the engine's crankshaft (via the drive belt) into electrical energy. This electrical energy recharges the vehicle's battery and powers all electrical components (lights, radio, ignition system, etc.) while the engine is operating.
The internal regulator (IR) within this alternator manages the output voltage to ensure it remains within a safe and efficient range, preventing overcharging or undercharging of the battery.
Maintenance
While alternators are generally low-maintenance components, periodic checks can help ensure longevity and optimal performance:
- Belt Inspection: Regularly check the drive belt for signs of wear, cracks, or fraying. Ensure it has proper tension. A loose or worn belt can lead to insufficient charging.
- Wiring Connections: Periodically inspect all electrical connections to the alternator for corrosion or looseness. Clean any corrosion and ensure connections are tight.
- Battery Health: A weak or failing battery can put undue strain on the alternator. Ensure your battery is in good condition and holds a charge properly.
- Cleanliness: Keep the alternator free from excessive dirt, oil, and debris, which can impede cooling and affect performance.
Image: Front view of the alternator, highlighting the pulley and fan assembly.
Troubleshooting
If you experience issues with your vehicle's charging system, consider the following common troubleshooting steps. Professional diagnosis is recommended for persistent problems.
- Battery Warning Light On:
- Check the drive belt for looseness or damage.
- Inspect all wiring connections to the alternator and battery for corrosion or poor contact.
- Test the battery voltage with the engine off (should be around 12.6V) and with the engine running (should be 13.8-14.8V). If the voltage does not increase when the engine is running, the alternator may not be charging.
- Dim Lights or Electrical Malfunctions:
- This often indicates insufficient power from the charging system. Follow the steps for "Battery Warning Light On."
- Ensure the battery is fully charged and in good condition.
- Grinding or Whining Noises:
- Could indicate worn bearings within the alternator.
- Check the drive belt and pulley for proper alignment and tension.
If these steps do not resolve the issue, it is advisable to consult a certified automotive technician.
Warranty and Support
DB Electrical stands behind the quality of its products. This alternator comes with a 1-year warranty from the date of purchase.
If you encounter any issues with your product within the warranty period, please contact DB Electrical customer support. They are committed to assisting you and will facilitate a replacement if the product does not perform flawlessly as expected.
For further assistance or to initiate a warranty claim, please refer to the contact information provided with your purchase or visit the official DB Electrical website.
