Fuel Feed Pump Assembly with Diaphragm-Type Mechanical Feed Pump and Integrated Hand Primer Lever for ISUZU NKR NPR 4HF1

The fuel feed pump assembly (also known as fuel transfer pump or lift pump) carrying OEM numbers 8-97223289-0 and 8972232890 supplies diesel fuel from the fuel tank to the injection pump on ISUZU 4HF1 4.3L naturally aspirated diesel engines. It is a direct replacement for NKR and NPR series medium‑duty trucks manufactured from the mid‑1980s through the early 1990s.

The 4HF1 is a 4,334 cc inline‑four diesel engine with a bore and stroke of 112 mm × 110 mm, producing up to 88 kW (120 PS) at 3,200 rpm and maximum torque of 285 Nm at 1,800 rpm. Unlike common rail systems, this engine uses an in‑line injection pump that relies on a consistent, low‑pressure fuel supply from the feed pump.

This ISUZU 4HF1 fuel feed pump 8-97223289-0 directly replaces the factory unit in the following configurations:

This feed pump also fits 4HG1 engines (the later 4.3L variant) and 4BD1/4BE1 engines that use the same injection pump mounting flange pattern.

• Direct OEM Replacement for 4HF1 Engines - Matches original mounting flange bolt pattern and port orientation
• Integrated Hand Primer for Easy System Priming - Simplifies fuel filter changes and prevents dry cranking
• Nitrile Rubber Diaphragm Resists Modern Diesel - Formulated for biodiesel blends and low‑sulfur diesel additives
• Die‑Cast Aluminum Housing - No Rust - Corrosion-resistant coating for humid climates and winter roads
• Includes Mounting Gasket - No separate purchase required
• 100% Functionally Tested Before Packing - Each pump tested for pressure, flow rate, and seal integrity

• Prevents Hard Starting and Stalling - Restores check valve function and diaphragm sealing
• One Pump Covers Multiple ISUZU 4HF1 Chassis - Reduces inventory requirements for distributors
• Cost‑Effective Alternative to Injection Pump Overhaul - Saves customers money on misdiagnosed issues
• Prevents Secondary Fuel System Contamination - Avoids fuel dilution of engine oil
• Light Weight for Economical International Shipping - Efficient packaging for global distribution

The manufacturing facility holds ISO 9001:2015 certification. A certificate of analysis (COA) with batch traceability is available for wholesale orders. The supplier offers a 6‑month warranty against manufacturing defects.

• Individual packaging: Sealed in anti‑rust VCI bag, foam‑lined carton
• Carton dimensions: 15 × 12 × 8 cm per unit
• Net weight: 0.6-0.8 kg; gross weight (with packaging): 1.0 kg
• Master carton: 100 units per export carton (approx. 50 × 40 × 30 cm, 55 kg)
• Lead time: 3-7 working days for stock orders; 15-20 days for production orders above 500 pieces
• Minimum order quantity: 1 piece (sample order available)
• Shipping methods: FedEx, UPS, DHL for samples; sea freight (LCL/FCL) from Shanghai, Ningbo, Guangzhou ports
• H/S Code: 8413.30