Fuel Injection Pump 1J801-50500 for Kubota Engine V2403 D1803 Excavator KX040-4 U48-5 Tractor L3301 L3302 L3560 L3901 L4701 L4760 L4802

Fuel Injection Pump 1J801-50500 for Kubota Engine V2403 D1803 Excavator KX040-4 U48-5 Tractor L3301 L3302 L3560 L3901 L4701 L4760 L4802

This fuel pump is built to meet or exceed the original specs for Kubota Engine V2403 D1803 Excavator KX040-4 U48-5 Tractor L3301 L3302 L3560 L3901 L4701 L4760 L4802. The fuel pump is the heart of the fuel delivery system — it moves fuel from the tank to the engine at the correct pressure and flow rate. A failing pump doesn’t usually give much warning before it leaves you stranded.

Vehicle Compatibility

Replaces OEM Part Numbers

1J80150502 • 1J801-50502 • 1J80150501 • 1J801-50501 • 1J801-50500 • KEARP-1J801 • 1J80150500 • KEARP1J801 • 0445-020-200 • 0445020200 • 0445020187 • 0445020166

Signs You Need a Replacement

If your equipment is showing any of these symptoms, the injection pump may be the cause:

• Engine cranks but won’t start — no fuel reaching the injectors
• Stalling under load — engine dies when you demand more power
• Loss of power at high RPM — fuel delivery drops off at higher engine speeds
• Whining noise from fuel tank area — the pump bearings are wearing out
• Engine surging or bucking — inconsistent fuel pressure causes hesitation
• Hard starting after sitting — fuel drains back through a weak check valve

Before You Replace the Pump

Before replacing the fuel pump, check the fuel filter first — a clogged filter causes the same symptoms and costs a fraction of the price. If you confirm the pump is bad, replace the fuel filter at the same time. A restricted filter is often what killed the old pump. After installation, cycle the key to ON several times (without starting) to prime the system and bleed out any air before cranking the engine.

Frequently Asked Questions

Will this fit my Kubota V2403?
Yes. This part is designed to fit the Kubota V2403, D1803, KX040-4, L3301 among other models listed in the compatibility table above. Verify your specific model and engine code before ordering to ensure the correct fit.

Can I cross-reference 1J80150502 with 1J801-50502?
Yes. Both 1J80150502 and 1J801-50502 are interchangeable OEM numbers for this part. They refer to the same component with the same specifications, just different part number revisions. This replacement fits all applications listed for either number.

How do I check if my engine code (KX040, EF03) matches?
The engine code is stamped on a metal tag attached to the engine block, usually near the timing belt cover or on the cylinder head. Compare the code you find with the list above. Engine codes are 3 to 6 characters long and use a combination of letters and numbers.

How long does a Kubota fuel pump typically last?
Fuel pump life varies by application, but on Kubota equipment you can generally expect 5,000 to 10,000 hours of operation. Running the tank dry, using contaminated fuel, or neglecting the fuel filter are the top causes of premature failure. If your machine has over 5,000 hours and the fuel filter hasn’t been changed regularly, the pump is likely on borrowed time.

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