AM876266 AM876207 12V Fuel Pump | Cross-Reference for Yanmar 3TNV88 4TNV88

Variant-by-variant fitment check — every AM876266 / AM876207 unit is matched against your engine serial prefix and port clocking before dispatch.

Technical Specifications

Application Suitability

Why the Same Part Number Ships in Four Variants

One wrong variant means fuel starvation or a no-start on site.

The base number AM876266 covers a 12V Fuel Pump for Yanmar 3TNV88 4TNV88 John Deere cross reference application that spans dozens of machine models across multiple production years. Yet within that single identifier, the inlet and outlet port positions rotate, the electrical connector changes between two-pin and three-pin configurations, and the mounting flange bolt circle shifts depending on the engine sub-variant. We have seen field technicians receive a pump with the correct part number stamped on the box, only to find the fuel outlet faces 90 degrees away from where the hard line expects it. [NEED_CITE: fuel pump port orientation variance across engine serial ranges]

This is not a cataloging error. Equipment manufacturers revise fuel system layouts between model years without changing the base reference number. The superseded numbers AM876207, 2803-3000, and 28033000 (all for identification purposes) each map to specific production windows and engine serial prefixes. Ordering by the old manual without checking the machine's actual serial break point is a reliable way to put a machine out of service for another week while the replacement ships back and a corrected unit ships out.

Engine Serial Prefix Is the Real Part Number

The Yanmar engine family covered by this fuel pump — from 3TMN72 through 4TNV88 — shares a common displacement architecture but diverges in fuel delivery routing at the block level. A 3TNV88 engine with one serial prefix routes fuel from the tank through the pump and then into a return loop, while a different serial prefix of the same nominal engine uses a deadhead configuration with a pressure regulator built into the pump body. Installing the wrong variant causes either flooding or lean stumble, neither of which shows up until the engine is under load. The 12V Fuel Pump for Yanmar 3TNV88 4TNV88 John Deere cross reference must be confirmed against the full engine serial, not just the model designation printed on the valve cover.

Port Clocking and Connector Match Are Non-Negotiable

The most frequent fitment failure we encounter is port clocking: the angular position of the inlet and outlet nipples relative to the mounting face. On John Deere compact tractors in the 3025D through 3046R range, the fuel pump mounts to the block with a three-bolt flange, but the outlet port rotates depending on whether the engine was built with a left-side or right-side fuel filter housing. A pump with the right bolt pattern but wrong port angle physically bolts on, then refuses to connect to the existing fuel line without bending or replacing the hard tube. Similarly, the electrical connector shifted from a spade-terminal pair to a sealed two-pin Deutsch-style plug around mid-production on several John Deere turf models. [NEED_CITE: electrical connector transition in John Deere compact utility tractor fuel systems]

Reading the Specs That Actually Matter in the Field

The T6 heat-treated aluminum alloy housing handles the thermal cycling between cold morning starts and sustained 85°C operating temperature without warping the mounting face. That flatness matters because the ±0.15 mm mounting tolerance is tight enough that any distortion transfers directly to the internal diaphragm seating, causing either low pressure or internal leakage. The NBR diaphragm material was chosen for compatibility with standard diesel fuel blends at the rated 150 psi continuous working pressure; switching to a less resistant elastomer would shorten diaphragm life in the presence of modern ultra-low-sulfur formulations. Class H insulation on the solenoid coil protects against thermal degradation when the pump sits adjacent to exhaust manifold heat on tightly packaged engine bays.

What a Mismatch Costs Beyond the Part Price

A fuel pump that bolts on but has the wrong port clocking forces the technician to fabricate an adapter hose or reroute hard lines — work that introduces new leak points and adds hours to a job that should take minutes. When the machine is a compact excavator on a rented job site, those extra hours burn through the day rate with nothing to show for it. Worse, a pump with the correct port angle but wrong internal pressure regulation runs the engine lean under load, accelerating cylinder and piston wear that does not surface until the next overhaul. The field cost of a variant mismatch is never limited to the return shipping on the wrong unit. [NEED_CITE: fuel starvation damage progression in small-displacement diesel engines]

Why Sourcing Through This Channel Works

Our own production lines and qualified sourced partners operate under the same QC and warranty terms, so you receive consistent quality whether the pump comes from our facility or a verified manufacturing partner. The eight product categories we carry mean a fuel pump order can ship alongside the fuel filters, seal kits, and hose clamps the same job requires — one consignment, one tracking number. We stock common variants in our Guangzhou warehouse for fast dispatch, and we can identify the correct pump from a part number, machine model, photograph of the old unit, or even a nameplate image when the original label is worn or painted over. Our cross-reference verification covers superseded and alternate numbers across the Yanmar and John Deere ranges. We also supply sample units so you can physically confirm fitment before committing to a bulk order.

Documentation & Verification

• Commercial invoice and packing list referencing exact engine serial prefix and pump variant
• Part compatibility and cross-reference sheet showing AM876266 / AM876207 mapping to your specific engine build
• Dimensional inspection record covering port spacing, bolt circle diameter, and connector type
• Warranty terms document covering manufacturing defects for 3–12 months from dispatch
• Packing photographs showing pump orientation, protective wrapping, and box labeling before dispatch
• HS code and customs classification support for fuel pump exports

Fitment Check Before Installation

• Compare inlet and outlet port clocking angle against the old pump before removing protective caps
• Verify mounting bolt circle diameter and bolt count match the engine block flange
• Check electrical connector pin count and housing shape against the machine's wiring harness plug
• Confirm fuel line thread size and type (barbed, flare, or banjo) on both nipples before connecting hoses
• If any dimension or interface does not match, stop installation and contact the technical team for cross-reference review

Request a Fitment Verification

Provide your machine model, engine serial prefix, and if possible a photograph of the old pump's mounting face and connectors. Our technical team will cross-reference the serial number against known variant break points and confirm whether AM876266, AM876207, or a superseded reference applies to your specific build. If your nameplate is unreadable, a photo of the engine block casting number or the existing pump's port layout is usually enough to narrow down the correct variant.

Frequently Asked Questions

Q: How do I confirm this 12V fuel pump fits my specific Yanmar or John Deere machine? A: Send us the full engine serial number from the nameplate, or a clear photograph of the existing pump showing the port orientation and electrical connector. We cross-reference the serial prefix against our variant database to confirm bolt pattern, port clocking, and connector type before shipping. Machine model alone is often not enough due to mid-production changes.

Q: Are AM876266 and AM876207 interchangeable on the same engine? A: Not always. These numbers cover different production windows and may correspond to different port orientations or connector types within the same engine family. We verify interchangeability against your specific engine serial prefix before confirming a substitution. Never assume the numbers are freely swappable without checking the physical interface match.

Q: What is the difference between 2803-3000 and 28033000 references? A: Both are cross-reference identifiers (reference only) that map to the same base fuel pump family but may correspond to different equipment manufacturers or regional cataloging systems. The hyphenated and non-hyphenated formats sometimes indicate different OEM sourcing channels. We treat both as identification references and verify the physical pump against your engine serial regardless of which format your manual lists.

Q: I only have the machine model, not the part number — can you still identify the right pump? A: Yes, in most cases. Provide the machine model and, ideally, the engine serial prefix or a photograph of the existing fuel pump. We can also work from the engine block casting number or the machine's build date plate. Our identification process covers worn or painted-over nameplates where only partial information is readable.

Q: Can I order one sample to test fitment before buying in quantity? A: Yes, our minimum order is one piece. We recommend ordering a single sample to physically confirm port clocking, bolt pattern, and connector match on your machine before placing a fleet or workshop stock order. This eliminates the risk of committing to a bulk quantity of a variant that does not fit your specific engine configuration.