4P-9661 to 4P-9666 Fuel Injection Line Set for CAT 3406B

4P-9661 to 4P-9666 Fuel Injection Line Set for Caterpillar 3406B

Topvelsun supplies a six-piece high-pressure fuel injection line set consisting of part numbers 4P-9661, 4P-9662, 4P-9663, 4P-9664, 4P-9665 and 4P-9666 for Caterpillar 3406B diesel engine applications. These fuel lines are used in the engine fuel injection system to carry high-pressure diesel fuel from the injection pump to the fuel injectors.

The six pipes are supplied together as a replacement fuel injection line set. Each line has its own part number and installation configuration. The set is intended for customers repairing or replacing the corresponding fuel injection piping on compatible Caterpillar excavators and diesel-powered construction equipment.

Fuel Injection Line Set Contents

This supplied set includes the following six individually identified fuel injection lines. The numbers represent separate line components and should not be treated as interchangeable cross-reference part numbers.

Compatible Caterpillar Engines and Excavators

Engine Application: Caterpillar 3406B Diesel Engine

Selected Excavator Applications: CAT 245B | CAT 245D | CAT 375-A

Caterpillar parts references associate fuel line components in this series with 3406B engine applications, including selected hydraulic excavators. However, fuel injection line arrangements may differ according to the engine configuration, fuel injection pump and machine serial number. Complete-set compatibility should be checked against the original six line numbers before ordering.

Selected Caterpillar wheel loaders, track-type tractors and other diesel-powered machinery also use related 3406B fuel injection components. Please confirm the exact part numbers for each equipment application rather than relying on the engine family alone.

High-Pressure Fuel Injection Line Replacement

High-pressure fuel injection lines are essential components in mechanically injected diesel engines. They deliver fuel from the injection pump to the individual injectors. Correct routing, fitting dimensions and connection positions are important when selecting replacement pipes.

When existing injector pipes are cracked, damaged or leaking, replacement components must match the applicable engine arrangement. Individual pipe numbers 4P-9661 through 4P-9666 can be used to identify the corresponding replacement lines within this supplied set.

Ordering and Fitment Confirmation

Topvelsun supplies the six-piece fuel injection piping set for Caterpillar 3406B engine maintenance and replacement parts requirements. To request a quotation, please provide the engine model, equipment model, engine arrangement number, machine serial number and required quantity.

Photos of the original fuel injection pipes or their identifying part numbers can help confirm the correct replacement configuration before shipment.