Fuel Control Solenoid Valve 312-5620 / 326-4635 For CAT 320D Pump – High-Quality Replacement
1. Product: Solenoid Valve
2. Reference Numbers: 312-5620, 326-4635
3. Fitment: CAT 320D High Pressure Fuel Pump
4. Condition: Brand New, High-Quality Aftermarket (Made in China)
5. Manufacturer: Abosede
6. Shipping period：3-5 days
7. Payment terms：T/T, Western union, PayPal
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Product Introduction
This fuel control solenoid valve is a precision-engineered aftermarket replacement for the pump head of CAT 320D series excavators. Equivalent to OEM part number 312-5620, it regulates fuel flow into the high-pressure chamber, ensuring accurate rail pressure for smooth engine operation. Built in China with strict quality control, this valve is ideal for maintenance, remanufacturing, or replacement in demanding jobsite conditions.
✅ Main Functions
🎯 Controls fuel volume entering the pump based on engine load
📈 Maintains stable rail pressure for consistent injection timing
⚙️ Responds to ECU signals via solenoid-actuated armature movement
❄️ Improves cold start and idling performance
💡 Protects the pump by preventing over-pressurization or dry running
🧲 Internal Structure & Working Principle
The valve includes an electromagnetic coil and a movable armature. When the ECU sends a signal, the coil generates a magnetic field, pulling the armature forward to open or close an internal channel-thus controlling how much fuel enters the pumping chamber.
⚒️ Compatible Pump Models
compatible CAT 320D high-pressure fuel pump Models:
261-4037, 292-3749, 295-9127, 326-4634, 284-0684, 358-9085, 277-5192, 283-2271, 295-9125, 315-3020, 10R-7659, 2641A405, 352-6584, 361-4036, 292-3750, 295-9126, 326-4635, 358-9084, 257-2412, 277-5191, 276-8398, 291-5919, 317-8021, 289-5091, 289-7496, 315-3019, 321-1269, 368-9171, 320-2512, 10R-7660, 351-0973, 354-8436, 10R-7662
These are commonly installed in CAT 320D excavators and other Caterpillar C6.4/C6.6 engine platforms.
⚠️ Failure Symptoms (When Replacement is Needed)
- Irregular or insufficient rail pressure
- Hard starting, especially when cold
- ECU fault codes related to fuel regulation
- Engine surging or hesitation during load changes
💎 Product Advantages
🏭 Manufactured by top-tier diesel parts factories in China
🔩 100% dimensionally compatible with OEM valve body and port
🧪 Fully tested for coil resistance, armature response, and sealing integrity
💰 Cost-effective alternative to expensive OEM parts
📦 Reliable option for remanufacturers and large fleet workshops
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