Fuel Injection Pump 352-6584 for Caterpillar CAT Engine C4.4 Excavator M313D M315D Backhoe Loader 420E 430E 450E
This fuel pump is engineered as a direct replacement for the Caterpillar CAT Engine C4.4 Excavator M313D M315D Backhoe Loader 420E 430E 450E. Manufactured to meet or exceed OEM specifications, it delivers reliable performance in demanding conditions. Each unit is tested for fuel flow, pressure rating, and durability before leaving the factory to ensure consistent quality across every order.
Vehicle Compatibility
| Application | Details |
|---|---|
| Caterpillar | See product specifications |
| CAT Engine C4.4 Excavator M313D M315D Backhoe Loader 420E 430E 450E Part Number:CA3526584, 352 | 6584, 3526584 Engine |
| Caterpillar C4.4 Applications | See product specifications |
| Caterpillar Paving Compactor: CB | 54, CB-64, CS-54 |
| Caterpillar Track Tractor: D3K LGP, D3K XL, D4K LGP, D4K XL, D5K LGP, D5K XL | See product specifications |
| Caterpillar Asohalt Paver: AP | 500E, AP-555E, BG500E, BG555E |
| Caterpillar Integrated Toolcarrier: IT14G | See product specifications |
| Caterpillar Wheel Excavator: M313D, M315D | See product specifications |
| Caterpillar Wheel Loader: 914G | See product specifications |
| Caterpillar Backhoe Loader: 420E, 430E, 450E | See product specifications |
Replaces OEM Part Numbers
CA3526584 • 352-6584 • 3526584 • Engine • Caterpillar
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 — The pump may have lost prime or stopped delivering fuel. Check for fuel at the filter outlet before replacing the pump.
- Stalling under load — A weak pump can’t maintain pressure at high demand. The engine runs fine at idle but dies when you put it to work.
- Fuel pressure warning (if equipped) — Modern Caterpillar equipment monitors fuel rail pressure. A low-pressure warning often means the pump is failing.
- Loud whining from fuel system — A failing pump makes a high-pitched whine that gets louder as it warms up. Normal pump noise is a low hum.
- Air in fuel lines — If you see bubbles in the transparent fuel line or the primer bulb won’t stay firm, the pump may be drawing air through a worn seal.
- Excessive return flow — Too much fuel returning to the tank instead of reaching the injectors indicates internal pump wear.
Before You Replace the Pump
Before replacing the pump, check the fuel filter and fuel lines for restrictions. A blocked filter causes the same symptoms as a failing pump on Caterpillar equipment. When installing the new pump, fill it with clean fuel before connecting the lines — this reduces priming time and prevents dry-run damage. After installation, bleed the system fully and check for leaks at all connection points. Replace the fuel filter at the same time as the pump to protect the new unit from debris.
Frequently Asked Questions
Will this fit my Caterpillar M313D?
Yes. This part is designed to fit the Caterpillar M313D, M315D, 420E, 430E 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 CA3526584 with 352-6584?
Yes. Both CA3526584 and 352-6584 are interchangeable OEM numbers for this part. They refer to the same component with the same specifications, just different part number revisions.
How do I check if my engine code (BG500E) 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.
How long does a Caterpillar fuel pump typically last?
Fuel pump life varies by application, but on Caterpillar 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.
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