Matched System Kits — Yanmar TNV fuel pump AM876266 ships with cross-reference verification against superseded AM876207 and paired filter elements to address root-cause contamination.
Technical Specifications
| Parameter |
Value |
| Part Number |
AM876266 |
| Product Type |
Fuel Pump |
| Cross-Reference |
AM876207 (reference only), 2803-3000 (reference only), 28033000 (reference only) |
| Machine Fitment |
John Deere Tractor 260, 332, 430, 655, 755, 756, 790, 855, 856, 990, 2520, 2720, 3005, 3120, 3203, 3320, 3520, 3720, 4005, 4105, 1023E, 1025R, 1026R, 2025R–2038R, 3025D–3046R, 4044M–4075R; John Deere Mower 997, 1435–1585, 1600, 1905, 2550–2750, 7200–8800, 2500B/E, 2653B, 3225C–3245C, 6080A–9009A, F735–F935, Z994R, Z997, Z997R; John Deere Loader 110, 110TLB; John Deere Progator 2020, 2030, 2030A; John Deere Excavator E18ZS |
| Engine Compatibility |
Yanmar 3TMN72, 3TNA72C, 3TNE74C, 3TNM74F, 3TNV70, 3TNV76, 3TNV80F, 3TNV82A, 3TNV84, 3TNV84HT, 3TNV84T, 3TNV86CHT, 3TNV86CT, 3TNV88, 3TNV88C, 4TNV84T, 4TNV86CHT, 4TNV86CT, 4TNV88 |
| Voltage |
12V |
| Condition |
New Aftermarket |
| Warranty |
3–12 months |
| Manufacturing Standard |
ISO-certified production partners |
Application Suitability
| Engine System |
Related Components |
| Yanmar TNV/TNM indirect-injection diesel fuel delivery |
Fuel filter element, lift pump lines, tank strainer |
| John Deere compact tractor fuel circuit (2520–4075R series) |
Primary and secondary fuel filters, fuel shut-off solenoid |
| John Deere commercial mower fuel supply (1550, 8700A, Z997R) |
Inline fuel filter, fuel tank breather, return hose |
| Compact excavator fuel system (E18ZS) |
Fuel water separator, primer bulb, supply hose clamps |
Why Replacing Only the Fuel Pump Invites a Second Failure
A 12V fuel pump AM876266 engine rebuild replacement rarely fails alone — upstream contamination destroys the new unit within weeks.
In mining and agricultural sites across West Africa, I have watched crews swap a failed lift pump on a Yanmar 3TNV88 and send the machine straight back to work. Weeks later the same engine loses power or refuses to start. Teardown reveals scored plunger surfaces and debris-laden diaphragm chambers. The original failure was caused by contaminated fuel or a saturated filter, and the new pump inherited the same hostile environment. Addressing the fuel system as a whole — filter, lines, tank condition, and pump together — prevents the repeat teardown that no workshop schedule can absorb. [NEED_CITE: diesel fuel contamination effects on rotary and diaphragm pump service life]
The Fuel System Context Around This Pump
The Yanmar 3TNV88 and 4TNV88 indirect-injection diesels rely on steady low-pressure fuel delivery from this 12V electric lift pump to feed the injection pump. When flow drops or pressure fluctuates, the injection pump starves, combustion becomes incomplete, and cylinder wash accelerates ring wear. A 12V fuel pump AM876266 engine rebuild replacement installed without inspecting the filter element and supply hose leaves the root cause untouched. Matching the pump with a fresh fuel filter and verifying hose integrity closes the loop on the fuel circuit.
Superseded Numbers and Engine Variant Differences
Across John Deere model generations, AM876207 was superseded by AM876266 for the same fuel delivery role. Ordering against an older service manual may pull the earlier number, which can differ in connector orientation or port thread on certain Yanmar 3TNV84T and 3TNV86CT builds. Verifying the engine serial plate — distinguishing, for example, a 3TNV88 from a 3TNV88C — rules out port-position or connector-pin mismatches before the unit ships. [NEED_CITE: Yanmar TNV engine serial variant identification for fuel system parts]
Reading the Specifications That Matter
The 12V rating aligns with the standard electrical architecture on John Deere compact tractors and commercial mowers, preventing voltage mismatch that can damage engine control modules. The new aftermarket condition means fresh diaphragm and valve assemblies, avoiding the internal leakage paths that develop in salvaged units. ISO-certified manufacturing partners ensure dimensional consistency on port threads and mounting patterns across production runs. The 3–12 month warranty window covers manufacturing defects, giving rebuild shops confidence when stocking matched pump-and-filter kits for common Yanmar platforms.
The Hidden Cost of Ignoring System-Level Diagnosis
When a repair order lists only the fuel pump and omits the filter, water separator, and line inspection, the new pump enters the same contaminated circuit that killed its predecessor. On a John Deere 1550 mower fleet, this pattern produced repeat failures across multiple units within a single season. The labour cost of a second teardown and the machine downtime that follows erase any savings from a parts-only approach. System-level supply — pump, filter, gaskets, and hose clamps on one order — eliminates the split delivery that forces a machine to sit idle waiting for the second consignment. [NEED_CITE: fuel system overhaul best practice for indirect injection diesel engines]
Why Source This Component Through XUNPO
Own production lines and qualified sourced supply operate under one account and one warranty, so a 12V fuel pump AM876266 engine rebuild replacement ordered alongside fuel filters and seal kits carries identical quality terms. Eight product categories mean the entire fuel system job list ships as one consignment rather than fragmented orders from multiple vendors. Part identification works from a number, a machine model, or a photograph of a worn nameplate — critical when field conditions have erased the original markings. Cross-reference verification covers superseded numbers like AM876207 to AM876266, ensuring the correct variant is dispatched. Sample supply is available for fitment confirmation before a distributor commits to bulk stock. The technical team confirms compatibility and grade against engine serial data, reducing the trial-fitment risk that plagues aftermarket sourcing.
Documentation & Verification
- Commercial invoice listing AM876266 with cross-reference to AM876207 noted as reference only
- Packing list matching each fuel pump to its associated filter and gasket line items
- Dimensional inspection record covering port thread, mounting bolt pattern, and connector type
- Warranty terms sheet specifying coverage period and claim procedure for fuel system components
- Packing photographs showing pump protection and kit consolidation before crate closure
- HS code and customs documentation support for fuel pump and filter kit export
Installation & Rebuild Sequence
- Flush the fuel tank and inspect the tank strainer before connecting the new AM876266 pump
- Replace primary and secondary fuel filters simultaneously to protect the fresh diaphragm assembly
- Verify 12V connector pin orientation matches the Yanmar engine harness before energizing the circuit
- Torque mounting fasteners to specification and check supply-line clamps for dry-rot cracks
- Prime the system and run at idle to purge air, then inspect all joints for weeping before load application
Preparing Your Enquiry
Provide the Yanmar engine model and serial number — for example, 3TNV88 versus 3TNV88C — along with any previous rebuild history to confirm whether AM876207 or AM876266 applies to your machine generation. If the nameplate is illegible, a photograph of the existing pump, its connector, and the mounting face allows our technical team to cross-reference the correct variant. Specify whether you need the pump alone or a matched fuel system kit with filters and gaskets, so the quotation covers the complete job.
Frequently Asked Questions
Q: What else in the fuel system should be replaced when this pump fails?
A: The upstream fuel filter element is the most common culprit behind premature pump failure on Yanmar TNV engines. Replace primary and secondary filters, inspect supply and return hoses for internal degradation, and check the tank strainer. Ordering the pump as part of a matched kit ensures nothing is missed during teardown.
Q: Is AM876207 still valid or has it been superseded?
A: AM876207 has been superseded by AM876266 across most John Deere and Yanmar applications. Older service manuals may still reference the earlier number. Cross-reference verification against the engine serial plate confirms which variant fits your specific machine generation and build.
Q: Does the same pump fit both 3TNV88 and 4TNV88 engines?
A: The 12V fuel pump serves both three-cylinder and four-cylinder TNV variants, but port orientation and connector type can differ between sub-models such as 3TNV88 and 4TNV88CT. Confirming the exact engine serial variant before ordering prevents mismatched interfaces at installation.
Q: What fuel system contaminants cause premature pump failure?
A: Particulate ingress, water contamination, and microbial growth in stored diesel all accelerate diaphragm wear and valve sticking. On Yanmar indirect-injection engines, a saturated or bypassed fuel filter passes debris directly into the lift pump. System-level inspection during replacement addresses these root causes.
