105220-5031 Isuzu 6BB1 / 6BD1 Engine Hand Primer Pump Assembly

Product Overview

105220-5031 is a genuine-quality hand primer pump assembly (manual fuel feed pump) designed for Isuzu 6BB1 and 6BD1 series engines. This hand pump is manufactured by Japan ZEXEL Corporation as an OEM supplier. It is installed on the fuel filter head or within the fuel line and is used to manually prime the fuel system before engine start-up, expelling trapped air and ensuring a steady fuel supply to the high-pressure fuel pump. It is an essential auxiliary component of the diesel engine fuel system.

This pump is widely used in HITACHI excavators, Isuzu trucks, and other construction equipment and commercial vehicles powered by 6BB1/6BD1 engines. The hand primer pump plays an irreplaceable role during fuel filter changes, fuel system maintenance, or restarting after running out of fuel.

Product Specifications

Compatible Models

This hand primer pump is compatible with equipment powered by Isuzu 6BB1/6BD1 series engines, including but not limited to:

• HITACHI: EX200-1, EX200-2, EX200-3, EX220-1, EX220-2, EX220-3, UH083, UH063

• SUMITOMO: SH200, SH200A1, SH200A2

• KATO: HD700, HD700V

• Isuzu Trucks: FSR, FTR, FVR, NKR, NPR, NHR, NPR series

• Other Equipment: Loaders, buses, and industrial machinery equipped with 6BB1/6BD1 engines

Note: The above is a partial list of compatible models. Please verify against your engine model (6BB1/6BD1). Confirm that your old hand pump part number matches before installation.

Key Features

• ZEXEL OEM Quality: Manufactured by Japan ZEXEL, an OEM supplier to Isuzu, ensuring reliable quality and perfect compatibility.

• Efficient Priming: Manual operation quickly establishes low-pressure fuel circuit pressure, effectively expelling air from the fuel system.

• Easy Operation: Ergonomic design with smooth pressing action – no special tools required.

• Reliable Sealing: High-quality sealing structure prevents fuel leakage and air ingress.

• Direct Replacement: Standard OEM specification for hassle-free, bolt-on installation.

• Broad Application: Fits HITACHI EX series excavators, SUMITOMO SH series excavators, Isuzu trucks, and many other mainstream equipment brands.

Installation Tips

• Verify that the new hand primer pump matches the old unit (part number 105220-5031) before installation.

• Ensure the sealing washer or O-ring is properly positioned for a good seal.

• After installation, press the hand primer pump several times until firm resistance is felt, indicating that the fuel system is primed and air has been expelled.

• Start the engine and check for any fuel leaks.

After-Sales Support

• Genuine product, sourced from Japan, ZEXEL OEM original.

• Contact your supplier for any quality concerns.