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Doosan OEM Starter Motor 24V Heavy Duty Electric Starter for DX300LC-9C DX300LCA DX360LC-7M DX380LC Excavators
Brand Name:
Doosan
Model Number:
DX380LC
Place of Origin:
China
Minimum Order Quantity:
1
Price:
Negotiable
Supply Ability:
1000pcs/month
Product Details
| Usage Life: | Long Service | Keyword: | Excavator Parts |
|---|---|---|---|
| Cbm: | 10*5*5CM | Surface Treatment: | Natural Color |
| Shipment: | Express | Certifie: | ISO9001 |
| Lead Time: | 1-3 Days | Certifiion: | ROHS |
| Power: | Hydraulic | Compatibility: | Suitable For Various Excavator Models |
| Part No: | 2480U411F3 | Delivery: | Within 7days |
| Preheat Time: | Less Than 3min | Color: | Gray |
| Shipping: | Express,Sea,Air | ||
| Highlight |
Doosan OEM starter motor 24V,heavy duty electric starter excavator,DX300LC-9C excavator starter motor |
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Product Description
| Parameter | Value |
|---|---|
| Brand / Origin | Doosan (Genuine OEM) / South Korea |
| OEM Part Number | 65.06310-0032 / 300516-00041B (varies by model) |
| Type | Gear-Reduction Electric Starter Motor |
| Rated Voltage | 24V DC |
| Rated Power | 4.5 – 7.0 kW (model-specific) |
| Cranking Torque | ≥25 N·m |
| No-Load Speed | 5,000 – 6,500 rpm |
| Engagement Type | Solenoid-Actuated Pinion Drive |
| Drive Gear Teeth | 11T / 12T (model-specific) |
| Rotation | Clockwise (viewed from drive end) |
| Compatible Engines | Doosan DL08 / DE12TIA-C2A / Scania DC09 |
| Compatible Models | DX300LC-9C / DX300LCA / DX360LC-7M / DX380LC |
| Operating Temperature | -25°C to +80°C |
| Weight (Approx.) | 8.5 – 12 kg |
| Certification | ISO 9001, Doosan OEM Certified |
⚙️ Manufacturing Process
- Raw Material Selection: High-purity copper for windings, carburized alloy steel (20CrMnTi) for pinion gear, premium electrical steel for armature core.
- Armature Winding: Precision CNC winding with automatic turn-counting control, ensuring consistent coil resistance and magnetic field strength.
- Planetary Gear Machining: 5-axis CNC hobbing and shaping achieve gear tooth tolerances within ±0.01mm for smooth, quiet operation.
- Carburizing & Hardening: Pinion gear teeth hardened to HRC 58-62 with controlled case depth (1.5-2.0mm) for maximum wear resistance.
- Solenoid Assembly: Precision-wound pull-in and hold-in coils with epoxy-impregnated insulation for moisture resistance.
- Motor Assembly: Clean-room assembly with controlled air gap tolerances between armature and field coils.
- Dynamic Balancing: Armature dynamically balanced to ≤2.5 g·mm to minimize vibration during high-speed operation.
- 100% Factory Testing: Every unit tested for no-load speed, stall torque, solenoid pull-in voltage, current draw, and insulation resistance before shipping.
🔍 Technology & Principle
The Doosan OEM starter motor operates on the gear-reduction DC motor principle: when the ignition key is turned to the START position, the solenoid switch is energized, performing two simultaneous actions — (1) it pushes the drive pinion gear forward to mesh with the engine flywheel ring gear, and (2) it closes the high-current contacts to power the DC motor. The motor's armature rotates at high speed (5,000-6,500 rpm), and the planetary gear reduction set (ratio 3:1 to 4:1) converts this into high-torque, low-speed rotation at the pinion gear. This torque is transferred through the flywheel ring gear to crank the engine at 150-250 rpm, achieving the compression ignition threshold for the diesel engine. Key technologies include:
- Overrunning Clutch (One-Way Bearing): Automatically disengages the pinion from the ring gear once the engine starts and exceeds starter speed, preventing destructive over-speeding of the armature.
- Pull-In / Hold-In Coil System: Dual-coil solenoid design — pull-in coil provides initial high-force engagement, hold-in coil maintains position with lower current draw, reducing battery drain.
- Thermal Overload Protection: Internal thermal cutoff prevents motor burnout during extended cranking attempts (>30 seconds continuous).
- Precision Pinion-to-Ring Gear Ratio: Optimized tooth count matching ensures smooth, clash-free engagement every time, extending both starter and ring gear life.
🌟 Product Features
- 100% Genuine Doosan OEM: Manufactured by Doosan's authorized starter motor supplier, ensuring original quality, exact fitment, and full traceability.
- Gear-Reduction Planetary Drive: Internal planetary gear set amplifies motor torque by 3-4×, delivering powerful cranking with a compact, lightweight motor body.
- High-Power Solenoid Switch: Heavy-duty electromagnetic solenoid ensures reliable pinion engagement every time, rated for 500,000+ actuation cycles.
- Premium Copper Windings: High-purity copper armature and field coils maximize electrical efficiency and resist thermal degradation under repeated cranking.
- Hardened Drive Gear: Carburized alloy steel pinion gear (HRC 58-62) withstands repeated flywheel ring gear engagement without tooth wear.
- Sealed Housing Design: IP67-rated enclosure prevents dust, water, and mud ingress — critical for excavator undercarriage-mounted installations.
- Over-Crank Protection: Built-in overrunning clutch prevents engine back-drive from damaging the starter after engine ignition.
- Direct Bolt-On Fit: Matches original mounting flange dimensions and bolt patterns — no modifications or adapters required.
❓ FAQ
Q: Is this starter motor compatible with my Doosan DX300LC-9C with DL08 engine?
A: Yes, this genuine Doosan OEM starter motor is specifically designed for DX300LC-9C, DX300LCA, DX360LC-7M, and DX380LC models. Please provide your machine's serial number for exact part number confirmation.
A: Yes, this genuine Doosan OEM starter motor is specifically designed for DX300LC-9C, DX300LCA, DX360LC-7M, and DX380LC models. Please provide your machine's serial number for exact part number confirmation.
Q: What battery capacity is required for this 24V starter?
A: We recommend a minimum of 2× 12V batteries (150Ah each) connected in series for 24V operation. Cold Cranking Amps (CCA) should be ≥800A per battery for reliable cold-weather starting.
A: We recommend a minimum of 2× 12V batteries (150Ah each) connected in series for 24V operation. Cold Cranking Amps (CCA) should be ≥800A per battery for reliable cold-weather starting.
Q: How do I know if my starter motor needs replacement?
A: Common signs include slow cranking speed, clicking sound without engine turnover, grinding noise during engagement, starter not disengaging after engine starts, or complete failure to crank.
A: Common signs include slow cranking speed, clicking sound without engine turnover, grinding noise during engagement, starter not disengaging after engine starts, or complete failure to crank.
Q: What is the maximum continuous cranking time?
A: Do not exceed 30 seconds of continuous cranking. Allow 1-3 minutes cooling between attempts. The built-in thermal protection will cut power if overheating is detected.
A: Do not exceed 30 seconds of continuous cranking. Allow 1-3 minutes cooling between attempts. The built-in thermal protection will cut power if overheating is detected.
Q: What is the lead time for delivery?
A: In-stock units ship within 1-7 business days via air freight. For specific part numbers or large orders, allow 2-3 weeks.
A: In-stock units ship within 1-7 business days via air freight. For specific part numbers or large orders, allow 2-3 weeks.
Product Highlights
Genuine Doosan OEM 24V starter motor for DX300LC-9C, DX300LCA, DX360LC-7M, DX380LC excavators. Features gear-reduction design, 4.5-7.0kW power, ISO9001 certified, long service life, and quick 1-3 day lead time with express shipping.
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