Delivery Valve 090140-5120: Key Specs, Failure Symptoms & Replacement Guide
1. Specifications
The Delivery Valve 090140-5120 (Cross Reference: 131110-5120) is a precision component used in mechanical diesel injection pumps. Its primary function is to maintain fuel line pressure, prevent fuel backflow, and improve injection cut-off performance.
• Part Number: 090140-5120 • Cross Reference: 131110-5120, 9413610027, 5156410060 • Stamping Code: A33 • Type: Delivery Valve Assembly • Application: Mechanical Diesel Injection Pumps • Applications: ISUZU 4BD1 6BD1
2. Common Failure Symptoms
A worn or damaged delivery valve can affect fuel pressure and injection quality, leading to:
• Hard starting • Rough idle • Reduced engine power • Increased fuel consumption • Black exhaust smoke • Unstable fuel delivery
3. When to Replace
Replacement is recommended if the injection pump is being rebuilt or if inspection reveals wear, scoring, leakage, or pressure loss. Installing a new delivery valve can help restore fuel system efficiency, improve combustion performance, and support reliable engine operation.