4P-9381 to 4P-9386 Fuel Injection Line Set for CAT 3306

4P-9381 to 4P-9386 Fuel Injection Line Set for Caterpillar 3306

The 4P-9381 to 4P-9386 fuel injection line set contains six individual high-pressure fuel delivery pipes for Caterpillar 3306 series diesel engines. These injector lines connect the fuel injection pump to the engine fuel injectors and are used in the mechanical fuel injection system of compatible excavators and construction machinery.

Topvelsun offers this six-piece replacement fuel line set for excavator engine maintenance and fuel system repairs. The individual pipe numbers correspond to Caterpillar fuel injector line references. Each pipe has its own configuration and should be matched to the correct engine arrangement.

Fuel Injection Line Set Contents

The six-piece set contains the following individually identified fuel injection lines. These part numbers represent separate components in the supplied set and are not interchangeable cross-reference numbers.

Compatible Caterpillar Excavators and Engines

Engine Family: Caterpillar 3306 | 3306B | 3306C

Selected Excavator Models: CAT 330 L | 330B | 235B | 235C | 235D

These fuel injection line part numbers are listed for multiple Caterpillar 3306 engine applications. Selected Caterpillar excavators share these references, but individual engine arrangements and fuel injection configurations may differ. Confirm all six line numbers against the machine serial number and engine arrangement before ordering a complete set.

Individual fuel injection lines in this series are also listed for selected Caterpillar bulldozers, wheel loaders, motor graders and industrial engine applications. Compatibility for a complete six-piece set must be verified separately for each equipment configuration.

High-Pressure Fuel Line Replacement

Fuel injector lines transfer high-pressure diesel fuel from the injection pump to the injectors. Correct pipe shape, connection position and routing are important for proper installation. A leaking, cracked or damaged injection line should be replaced with a component matching the original engine arrangement.

For CAT 3306 engine repairs, the six fuel injection pipes can be identified individually by their part numbers. Customers may inquire about a complete six-piece set or individual lines according to their maintenance requirements.

Ordering and Fitment Confirmation

To request a quotation from Topvelsun, please provide the Caterpillar engine model, excavator model, machine serial number, engine arrangement number and required quantity. Photos of the original fuel injection lines can help confirm the correct pipe configuration before shipment.