295-4778: Caterpillar HEUI Actuating Pump 295-4778 | High Pressure Oil Pump for CAT C9 – Fits 325D 329D 330D 336D
Product Details
| **Exact OE Fitment** – Replaces: | 254-4358 / 295-4777 / 295-4778 / 319-0675 / 319-0677 / 319-0678; Cross-refers To 10R-8897, 10R-8899, 10R-8900, 10R-3145, 10R-3144, 304-0678 And 387-9433. | **Precision HEUI Actuation**: | Supplies Stable High Oil Pressure To Drive HEUI Unit Injectors For Precise Injection Timing And Metering. |
|---|---|---|---|
| **Wide C7/C9 Coverage**: | Fits CAT 3126E, C7 And C9 Engines In Excavators (324D–336D), Tractors (D6R, D7R), The 973C Loader And C7/C9 Truck Engines. | 100% Bench Tested: | Every Unit Pressure- And Flow-tested Before Shipment; Sealing Surfaces Protected For Safe Handling. |
| Ready To Install: | OEM-spec Mounting, Hardened Gears And Seals Per OE Design. | Full After-Sales Support: | 3-month Warranty, Worldwide Shipping And Responsive Technical Support. |
| Highlight |
Caterpillar HEUI actuating pump 295-4778,High pressure oil pump for CAT C9,Caterpillar fuel injection system with warranty |
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Product Description
295-4778: Caterpillar HEUI Actuating Pump 295-4778 | High Pressure Oil Pump for CAT C9 – Fits 325D 329D 330D 336D
This HEUI high-pressure oil pump (actuating pump) is a high-quality aftermarket replacement for Caterpillar C9 HEUI fuel injection systems. It replaces OE part number 295-4778, cross-referenced to 304-0678, 319-0678, 220-4276 and 312-0678. The pump builds and maintains the high oil pressure required to actuate HEUI unit injectors, delivering precise injection timing and metering for reliable starting, stable idle and full rated power. Hardened pumping gears and precision-machined housing stand up to sustained high-pressure operation, with OEM-spec mounting and sealing surfaces for a leak-free, bolt-on fit. Every unit is bench-tested for pressure and flow before shipment. Fits Caterpillar hydraulic excavators (325D, 329D, 330D, 336D, E336D). Export-packed, 12-month warranty and responsive technical support. Aftermarket replacement part — not a genuine Caterpillar product. "Caterpillar" and "CAT" are trademarks of their respective owners, used for reference only.
We are a professional manufacturing factory dedicated to diesel engine spare parts. Our core product line covers diesel fuel injectors, injector nozzles, fuel injection pumps and complete injector repair kits. Backed by steady in-house stock, rigorous quality inspection and direct factory pricing, we partner with global wholesalers, maintenance workshops and machinery enterprises. We deliver premium reliable spare parts, fast lead time and all-round one-stop export service. We warmly welcome your inquiries and long-term business cooperation.
| # | Question | Answer |
|---|---|---|
| 1 | Is this a genuine Caterpillar part? | No, it is an aftermarket replacement. |
| 2 | Which engines does it fit? | CAT C7 & C9 engines (3126E). |
| 3 | Which OE numbers? | 319-0678, 295-4777, 254-4358… |
| 4 | Is it new or remanufactured? | New or reman; bench-tested before shipping. |
| 5 | Does it need coding after install? | No. This pump needs no coding. |
| 6 | What warranty do you offer? | 12-month warranty on defects. |
| Part No. | OE Cross Reference | Type / Reman | Engine Fitment | Key Applications |
|---|---|---|---|---|
| 254-4358 | 10R-3145 · 254-4357 | HEUI actuator pump · 36T small flange | C9 · C7 | D6R III, 637G, 627G |
| 295-4777 | 10R-3144 · 304-0607 · 319-0622 · 384-0607 | HEUI HP oil pump · Reman 10R-3144 | C7 · C9 | 324D, 325D, 328D, 329D, 330D, 336D, M325D, 973C, 950H/962H |
| 295-4778 | 304-0678 · 319-0678 · 220-4276 · 312-0678 | HEUI HP oil pump | C9 | 325D, 329D, 330D, 336D, E336D |
| 319-0675 | 10R-8897 · 319-0677* | HUI pump · 23.5 LPM · Reman 10R-8897 | C9 · 3126E | 330C(L/LN),973C,D6R II |
| 319-0677 | 10R-8899 · 254-4357* · 32F61-00014 | HEUI actuator pump · Reman 10R-8899 | C7 · C9 | 324D–336D,950H/962H,E330D,E336D |
| 319-0678 | 10R-8900 · 387-9433 | HEUI actuator pump · 31T small flange · Reman 10R-8900 | C7 · C9 | E330C, E330D, 336D, E324D, D6R, D7R |
Product Highlights
295-4778: Caterpillar HEUI Actuating Pump 295-4778 | High Pressure Oil Pump for CAT C9 – Fits 325D 329D 330D 336D This HEUI high-pressure oil pump (actuating pump) is a high-quality aftermarket replacement for Caterpillar C9 HEUI fuel injection systems. It replaces OE part number 295-4778, cross...
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