Complete System Match — We verify this Yanmar and John Deere fuel pump against adjacent injectors, lines, and gaskets to ensure a fully matched fuel circuit rebuild.
Technical Specifications
| Parameter |
Value |
| Part Number |
AM876266/AM876207 |
| Cross-Reference |
AM876266, AM876207, 2803-3000, 28033000 (reference only) |
| Machine Fitment |
John Deere 1023E, 1025R, 3032E, 4052R, 7700; Yanmar 3TNV88, 4TNV88 |
| Product Type |
Fuel Pump |
| Voltage |
12V |
| Material |
Precision-cast aluminum alloy with T6 heat treatment |
| Diaphragm Material |
Nitrile rubber (NBR) |
| Diaphragm Temperature Rating |
120°C |
| Biodiesel Compatibility |
Up to B20 |
| Electrical Terminal Sealing |
IP65 |
| Shaft Runout |
≤0.03 mm |
| Flow Rate Test |
15 L/min @ 3.0 bar |
| Operating Pressure Range |
2.5–3.5 bar |
| Ambient Temperature Range |
-20°C to +85°C |
| Condition |
New Aftermarket |
| Warranty |
3–12 months against manufacturing defects |
| MOQ |
1 piece |
Application Suitability
| Engine System |
Related Components |
| Yanmar 3TNV88 / 4TNV88 Fuel Delivery |
Fuel injectors, return lines, supply filters, pump gaskets |
| John Deere 3013 / 3016 / DF-Series Fuel Circuit |
Injection pumps, high-pressure lines, water separator kits |
| Compact Excavator Fuel Systems |
Electric shut-off valves, primer bulbs, tank breathers |
| Agricultural Tractor Fuel Maintenance |
Sediment bowls, fuel heater elements, connector O-rings |
Why the Same 12V Fuel Pump AM876266 Engine Rebuild Replacement Fails Again
Replacing the pump without addressing upstream contamination or downstream restriction rarely solves the root cause.
Workshop supervisors often see a new 12V fuel pump AM876266 engine rebuild replacement stall within weeks because the actual failure originated in a restricted filter or a leaking injector return line. When inconsistent fuel pressure outside the 2.5–3.5 bar range is detected, it usually signals adjacent system faults rather than a pump defect [NEED_CITE: diesel fuel system pressure drop diagnostics]. Addressing the failed component alone leads to repeat teardowns and extended machine downtime.
The Fuel System Context for Yanmar and John Deere Engines
This unit serves as the primary supply component for Yanmar 3T/4T series and John Deere 3013/3016/DF-series engines. A 12V fuel pump AM876266 engine rebuild replacement must be matched with the correct injector spray patterns and fuel line pressures to prevent lean or rich running conditions. Sourcing the pump alongside the injectors and gasket sets ensures the entire fuel circuit is addressed in one overhaul.
Engine Serial Variants and Rebuild History
Yanmar and John Deere variants within the same model family may use different fuel pump configurations based on the engine serial range. Previous rebuilds might have altered the mounting flange or port positions. We verify the exact engine build sheet to confirm the shaft runout and diaphragm specifications match the current block configuration [NEED_CITE: Yanmar 3TNV88 service manual fuel system tolerances].
Thermal and Chemical Resistance Specifications
The NBR diaphragm is rated to 120°C and compatible with up to B20 biodiesel blends, addressing fuel degradation that often causes premature pump failure in agricultural applications. The precision-cast aluminum alloy housing with T6 heat treatment provides structural integrity under high-frequency vibration. Maintaining the IP65 electrical terminal sealing is critical to prevent moisture intrusion that leads to internal winding faults.
The Hidden Cost of Unverified Fuel Circuit Components
Selecting a pump without verifying the adjacent fuel lines and filters often results in early failure due to cavitation or debris ingestion. When the diaphragm material is not rated for modern biodiesel blends, the rubber degrades and contaminates the injectors downstream. This forces a second teardown and additional labor costs that far exceed the price of the initial component [NEED_CITE: biodiesel compatibility standards for NBR rubber].
System-Level Supply and Technical Verification
Our production and sourcing lines operate under unified quality control and warranty terms. We provide matched injector sets and overhaul gaskets in one shipment to prevent split freight. Technical support is available to confirm compatibility and grade based on engine serial numbers and nameplate images. We verify cross-reference numbers and superseded part codes to ensure accurate fitment. Sample units are available for fitment confirmation before bulk commitment.
Documentation & Verification
- Commercial invoice and packing list for customs clearance.
- Part compatibility and cross-reference sheet (reference only).
- Quality inspection record covering flow rate and pressure hold.
- Warranty terms for manufacturing defects.
- Packing photographs for pre-dispatch verification.
- HS code and customs documentation support.
Installation & Rebuild Sequence
- Verify shaft runout is ≤0.03 mm before mating to the engine block.
- Replace all adjacent O-rings and gaskets to maintain 2.5–3.5 bar pressure.
- Bleed the fuel circuit to prevent air locks that cause diaphragm stress.
- Test electrical terminal sealing (IP65) after connection to prevent short circuits.
Requesting a Technical Fitment Review
Please provide the specific engine model, serial number, and any history of previous rebuilds to confirm the correct variant. Sharing photographs of the existing nameplate and mounting flange helps our technical team verify the exact cross-reference match and ensure all adjacent fuel system components are included in the quote.
Frequently Asked Questions
Q: What other fuel system parts should be replaced together with this pump?
A: We recommend replacing the fuel supply filter, injector return lines, and all mounting gaskets simultaneously. A 12V fuel pump AM876266 engine rebuild replacement often fails early if adjacent hoses are restricted or if old O-rings leak, leading to air ingestion and pressure drops outside the 2.5–3.5 bar range.
Q: How do I confirm the right fuel pump variant for my specific engine serial?
A: Yanmar and John Deere engines may use different port positions or shaft lengths within the same model series. Providing the engine serial number allows us to cross-reference the build sheet and verify the 15 L/min flow rate and IP65 sealing requirements match your specific engine variant.
Q: Are matched injector sets and overhaul gaskets available in one shipment?
A: Yes, we consolidate the pump, injectors, fuel lines, and gasket sets under one commercial invoice. This ensures all components for the Yanmar 3TNV88 or John Deere DF-series rebuild arrive together, avoiding split freight and the downtime associated with waiting for secondary deliveries.
Q: What causes this fuel pump to fail, and how do I prevent repeat failure?
A: Premature failure often stems from fuel degradation, moisture contamination, or restricted upstream filters. Using a pump with a 120°C NBR diaphragm and B20 biodiesel compatibility helps resist chemical breakdown. Regular maintenance of the sediment bowl and tank breather prevents the debris ingestion that damages the shaft and bearings.
Q: Can I get a sample for fitment check before committing to a bulk order?
A: We provide sample units for fitment confirmation on the specific machine model. This allows you to verify the electrical terminal configuration, mounting pattern, and port alignment before we dispatch the full overhaul kit or fleet-level maintenance stock.
