Zexel Overflow Valve | 131424-5720 | Hino Injection Pump

New Zexel overflow valve (part number 131424-5720) for Zexel/Bosch inline (PE-type) diesel injection pumps, including Hino K-series applications. The overflow valve threads into the injection pump's fuel gallery and maintains feed pressure by returning excess fuel to tank once its set pressure is reached, while also aiding air bleeding. Calibrated opening pressure is approximately 255 kPa (2.6 kgf/cm²).

Key Features:

• Zexel overflow valve, part number 131424-5720
• Maintains injection pump gallery/feed pressure and aids air bleeding
• Calibrated opening pressure ~255 kPa (2.6 kgf/cm²), per Zexel test data
• For Zexel/Bosch inline (PE6P-type) injection pumps
• Cross-references to Bosch 9411611191 and Hino 22107-1240A

Specifications:

• Base part number: 131424-5720 (Zexel)
• Component type: Injection pump overflow valve
• Opening pressure: ~255 kPa (2.6 kgf/cm²); range 221–289 kPa
• Condition: New
• Application: Zexel/Bosch inline (PE-type) injection pumps
• Cross references: Bosch 9411611191, Hino 22107-1240A

Compatibility / Fitment:

• Fits Zexel/Bosch inline (PE6P and similar) diesel injection pumps calibrated for a ~255 kPa overflow valve
• Known applications include Hino K13C and K14C engines (Zexel PE6P pump assemblies)
• Opening pressure is pump-specific — 131424-series valves differ by pressure (e.g., 131424-4920 opens at ~127 kPa), so match by pump number
• Verify against your Zexel/Bosch pump number or the pump's calibration data before ordering
• Threads into the pump fuel gallery; install with a new sealing washer as needed

Conclusion:

The Zexel 131424-5720 is a new overflow valve for Zexel/Bosch inline diesel injection pumps, with a calibrated opening pressure of about 255 kPa (2.6 kgf/cm²), cross-referencing to Bosch 9411611191 and Hino 22107-1240A. It maintains pump feed pressure and aids bleeding. Because opening pressure is pump-specific, verify against your pump number before ordering.