3974604 Fuel Injector Pipe Set is a replacement fuel injector pipe set for Kubota & Bobcat skid steer loaders, including D1402, 643, 645, 743. The fuel injection lines (injector pipes) carry fuel between the injection pump and the injectors, and a return pipe brings surplus fuel back to the tank. Supplied by LIONKITS.
3974604 Fuel Injector Pipe Set Specifications
- Product Type: Fuel Injector Pipe Set
- Part Number: 3974604, 3974605, 3974606
- Compatible Brand: Kubota & Bobcat
- Machine Type: Skid Steer Loader
- Engine: D1402
Kubota & Bobcat Models Compatible with the 3974604 Fuel Injector Pipe Set
- Bobcat Skid Steer Loader: 643, 645, 743
- Kubota Engine: D1402
Your model is not listed? Contact LIONKITS via live chat or email with your machine model and nameplate photo, and we will confirm compatibility.
What Does a Fuel Injection Line Do?
The fuel injection lines (injector pipes) carry fuel between the injection pump and the injectors, and a return pipe brings surplus fuel back to the tank. Cracked, kinked or leaking lines cause hard starting, rough running and fuel leaks.
Signs the Filters or Parts Need Replacing
- Fuel leaks at the fittings or along the line: wet or dripping pipes.
- Hard starting or rough idle: lost fuel pressure or air in the system.
- Loss of power: a restricted or leaking line cannot deliver the full fuel quantity.
These symptoms overlap with other fuel, hydraulic and air system problems, so check the basics first.
How to Order and Install the 3974604 Fuel Injector Pipe Set
- Confirm your machine model, engine and the part number before ordering.
- Depressurize the fuel system and keep the connections clean when changing lines.
- Tighten the fittings to the specified torque and replace seals or washers where required.
- Bleed air from the fuel system, start the engine and check for leaks.
Frequently Asked Questions
What is the 3974604 Fuel Injector Pipe Set?
The 3974604 Fuel Injector Pipe Set is a replacement fuel injector pipe set for Kubota & Bobcat skid steer loaders under part numbers 3974604, 3974605, 3974606.
Which Kubota & Bobcat models does the 3974604 Fuel Injector Pipe Set fit?
It is listed for D1402, 643, 645, 743 and other models in the compatibility list above. If you are unsure, send your machine nameplate to LIONKITS for confirmation.
How do I know a fuel injection line has failed?
Typical signs are visible fuel leaks, hard starting, rough idle and loss of power.
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