320C or 320D running rough, losing power or hard to start? A worn 212-8559 fuel injection pump fails to deliver consistent injection pressure across all cylinders, causing the 3066 engine to smoke, surge or derate. RITO supplies this precision injection pump to restore clean, high-pressure fuel delivery and full engine power on your Cat 320C or 320D.
Item NO.:
212-8559Order(MOQ):
1pcsPayment:
T/T, WESTERN UNION, CHINESE BANK,PAYPALProduct Origin:
JAPANShipping Port:
Huangpu,GuangzhouLead Time：
In Stock212-8559 Fuel Injection Pump for Caterpillar 3066 / S6K engines on 320C, 320D, 321C and 323D excavators. Cross-references: 2128559, 10R-7652. Precision plunger and barrel set, calibrated governor and delivery valves restore correct injection timing, pressure and per-cylinder fuel balance for smooth, full-power 3066 operation.
| Part Number | 212-8559 / 2128559 / 10R-7652 |
|---|---|
| Part Name | Fuel Injection Pump (3066 / S6K Engine) |
| Compatible Brand | Caterpillar |
| Applicable Models | 320C, 320D, 321C, 323D Excavator (3066 / S6K Engine) |
| Application | Main fuel injection pump for Caterpillar 3066 and S6K diesel engines |
| Material | Precision plunger and barrel set, hardened steel housing |
| Product Color | Metallic industrial finish |
| Working Temperature | -25°C~+80°C |
| Key Function | Delivers precise high-pressure timed fuel injection to all cylinders of the Cat 3066 / S6K engine |
| Condition | 100% New Aftermarket OEM Quality |
| Packaging | Wooden Case Reinforced Carton Neutral Packing Customized Box |
Plunger and barrel clearance maintained within specification for correct injection pressure and per-cylinder fuel delivery balance across the full 3066 speed and load range.
Governor spring set and flyweight calibrated to 3066 OEM speed droop characteristic, providing stable engine speed under variable hydraulic load.
212-8559 cross-references to 2128559 and 10R-7652 across 320C and 320D production batches; confirm applicable cross-reference for your specific engine serial number.
Single pump covers 320C, 320D, 321C and 323D (3066 / S6K engine variant), simplifying procurement for Cat 320-series fleet maintenance.
FAQ
Q: What are the signs the 212-8559 injection pump is failing on my 320C?
A: Black or blue smoke at startup, progressive loss of engine power under hydraulic load, hard starting in cold conditions, uneven engine idle, and increased fuel consumption are all signs of injection pump wear or calibration drift.
Q: Does the 212-8559 injection pump require calibration after installation?
A: Yes. Fuel injection pumps require calibration on a test bench to set injection timing, delivery volume and governor response. Do not install without calibration; a mis-set pump will cause engine derating or smoke.
Q: Is 10R-7652 the same pump as 212-8559?
A: 10R-7652 is a Caterpillar remanufactured part number for the same 3066 injection pump application as 212-8559. Both are confirmed cross-references. Verify with the engine serial number if uncertain.
Q: How to confirm 212-8559 is the correct pump for my 320C 3066 engine?
A: Match existing pump part number 212-8559, 2128559 or 10R-7652 and confirm engine model is 3066 or S6K. Provide engine serial number to our team for cross-reference.
Q: What quality options are available?
A: We provide original, OEM and high-quality aftermarket versions with stable supply capability.
Q:Why Choose RITO?
A:Listed Factory
Stable&Reliable Quality
OEM Factory for Chinese Top Excavator Brands
Supplier to Fortune 500 Companies
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