294000-0039 294000-2600 Injection Pump 8-98346317-0 for Isuzu NPR Hitachi Zaxis JCB Excavators

Product Details

Wuhan Jinhong Auto Parts Co., Ltd. is a manufacturer and exporter of common rail fuel injectors integrating manufacturing,processing and R & D.

Our factory has a complete and scientific management system and professional product development team, products have been advancing with The Times, quality is also constantly improving, product quality and service have been widely recognized by the industry. Our company has its own factory, combined with the sales model of trade factory, we can provide customers with a full range of services. In addition, our company has international logistics partners to reduce transportation costs for customers. Our company is a leading manufacturer and supplier of Marine parts and auto parts in China. At the same time, we have established partnerships with hundreds of factories specializing in the production of various high-quality auto parts.

Our goal is to provide the best service at the best price, your satisfaction is our best return. Look forward to working with you. Welcome friends from all walks of life to visit, guidance and business negotiations.

Q1: What main vehicles and engines does the 294000-0039 pump fit?

A: This pump is engineered for Isuzu 4HK1 (5.2L) turbo diesel engines. It is widely used in Isuzu NPR/NQR series medium-duty trucks, as well as Hitachi Zaxis (ZX200-3, ZX210-3, ZX240-3) and Case CX210B/CX240B excavators.

Q2: Are part numbers 294000-0039 and Isuzu 8-97306044-9 the same thing?

A: Yes. 294000-0039 is the manufacturing part number used by Denso, while 8-97306044-9 (or 8973060449) is the official OEM part number used by Isuzu. They are the exact same physical pump.

Q3: What other Denso numbers can replace the 294000-0039?

A: It is fully interchangeable with 294000-0038 and the newer updated Denso production number 294000-2600 (as well as Isuzu number 8-98346317-0).

Q4: What are the common symptoms of a failing 4HK1 fuel pump?

A: When this HP3 common rail pump wears down or gets contaminated, the machine will usually experience:

• Difficulty starting or a long crank time (hard start when hot).

• Engine dropping into "Limp Mode" under load with a Low Rail Pressure Code (e.g., Isuzu Code P0087 / P0088).

• Black or white smoke from the exhaust due to unstable fuel pressure.

• Rough idling or sudden engine stalling.

Q5: Can I just replace the Suction Control Valve (SCV) instead of buying the whole pump?

A: If the pump has internal mechanical wear (like metal shaving flakes), replacing just the SCV will not fix the problem; the metal particles will quickly ruin the new valve. However, if the pump passes a manual pressure test and the only issue is an unstable idle or minor pressure fluctuations, changing just the SCV can sometimes solve the issue.

Q6: How do I prevent this new pump from failing early?

A: The Isuzu 4HK1 engine is very durable, but the common rail system requires clean fuel. To protect your investment:

1. Always replace the primary fuel filter and water separator when installing the new pump.

2. Ensure there are no metal shavings left in the rail or fuel lines from the old, failed pump.

3. Only use high-quality diesel fuel to prevent internal scoring.