9521A031H De-lphi Fuel Injection Pump

The 9521A031H De-lphi DP310 series fuel injection pump (OEM cross number: 398-1498, 463-1678) is a high-pressure fuel supply assembly specially calibrated for Cat-erpillar C7.1 engine, widely fitted on CAT 320D2, 320D2 GC, 323D3 excavators. This precision injection pump accurately controls fuel delivery volume and injection timing, outputting stable high-pressure diesel to realize full in-cylinder combustion. It effectively solves typical engine faults including difficult cold start, rough idle, insufficient heavy-load power, excessive fuel consumption and black smoke emission. Every pump undergoes strict bench calibration and sealing inspection before delivery, maintaining stable pressure output and long service life under long-term heavy-duty construction working conditions.

We are a professional manufacturer and wholesale supplier specializing in full-series diesel fuel system spare parts. Our product range covers fuel injection pumps, unit injectors, common rail injectors and related accessories for Del-phi, Cum-mins, Vo-lvo, Jo-hn Deere, Yanmar, Komatsu and Isuzu, widely applied in construction machinery, agricultural machinery, trucks and generator units.

All our products are manufactured in line with OEM standards and 100% bench tested before delivery to ensure stable performance and reliable tightness. We support bulk wholesale, customized packaging and efficient global delivery service.

Relying on stable product quality, factory direct price and thoughtful after-sales support, we provide one-stop fuel system spare part solutions for global maintenance dealers and trading partners.