HP4 Common Rail Fuel Injection Pump 368-9041 for Caterpillar CAT C7.1 Engine 320E 323 324E 326 329E Excavator
This fuel pump is engineered as a direct replacement for the Caterpillar CAT C7.1 Engine 320E 323 324E 326 329E Excavator. 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 C7.1 Engine 320E 323 324E 326 329E Excavator Replace Part Number:368 | 9041, 294050-0520, 3689041, 2940500520, CA368904, 294050-0521, 2940500521, T410146, 20R-4782, 20R4782, CA20R4782 Fit for |
| CAT Engine: C6.6, C7, C7.1, C13, 3306 Applications:Fit for | See product specifications |
| CAT Wheel Loader:924K, 926M, 930K, 930M, 938K, 938M, 950GC, 950K, 950M, 950M Z, 962K, 962M, 962M Z, 966E, 966F, 966F II, 966G, 972GFit for | See product specifications |
| CAT Excavator:323, 330, 320E, 320E L, 320E LN, 320E LRR, 320E RR, 323E L, 323E LN, 323E SA, 323F L, 324E, 324E L, 324E LN, 326F L, 326F LN, 329E, 329E L, 329E LN, 329F L, 330 GC, 330F, 330F L, 330F LN, 335F L, 335F LCR, 336 GC, M318F, M320F, M322FFit for | See product specifications |
| CAT Asphalt Paver: AP1000E, AP1000 F, BG1000E, AP1055 F, AP1055E, BG1055EFit for | See product specifications |
| CAT Material Handler: MH3022, MH3024, MH3026, MH3037Fit for | See product specifications |
| CAT Motor Grader: 120, 120 AWD, 120M 2Fit for | See product specifications |
| CAT Wheel Skidder: 525D, 535D, 545D, 555DFit for | See product specifications |
| CAT Wheel Feller Buncher: 2570C, 2570D, 2670C, 2670D, 563C, 563D, 573C, 573DFit for | See product specifications |
| CAT Generator Set: XQ230Fit for | See product specifications |
| CAT Track | Type Tractor: D6N, D6N XL, D6N LGP, D6K2, D6K2 LGP, D6K2 XL, D6N OEMFit for |
Replaces OEM Part Numbers
368-9041 • 294050-0520 • 3689041 • 2940500520 • CA368904 • 294050-0521 • 2940500521 • T410146 • 20R-4782 • 20R4782 • CA20R4782 • 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 320E?
Yes. This part is designed to fit the Caterpillar 320E, 323, 324E, 326 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 368-9041 with 294050-0520?
Yes. Both 368-9041 and 294050-0520 are interchangeable OEM numbers for this part. They refer to the same component with the same specifications, just different part number revisions.
My vehicle is a 4050 model – is it covered?
The compatibility range for this part includes 4050-0520. The 4050 model year falls within this range, but verify the engine code and body type match. Mid-year production changes sometimes mean two vehicles from the same model year use different parts.
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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