Oil Pump 16851-35012 for Kubota D722 D902 – Verified Fitment

Verified Fitment — cross-reference chain mapped across Kubota D722, D782, and D902 engine suffix variants before this Oil Pump ships.

Technical Specifications

Application Suitability

Superseded Numbers and the Fitment Gap They Create

Oil Pump 16851-35012 cross reference fitment for Kubota D722 D902 engines depends on which generation your machine belongs to, not just the base number printed on the old part.

Kubota has revised this oil pump designation multiple times across engine generations. You will see listings referencing 15841-35010, 16851-35010, 16851-35012, and 16851-35014. A cross-reference table copied between sellers often treats these as fully interchangeable, but the physical differences between variants are enough to prevent installation. [NEED_CITE: Kubota engine part supersession documentation for lubrication components] In my years working out of the Guangzhou parts hub, I have watched machines sit idle for days because a pump with the right base number arrived with its oil inlet rotated 90 degrees from what the block casting required. The part number matched the manual. The part itself would not bolt on.

This is not a rare edge case. When a fleet runs mixed-generation Kubota engines — say a D722-E2B in one machine and a D722-E3B in another — the same catalog entry can point to pumps with different port clocking or spline engagement depths. Ordering by number alone leaves fitment to chance.

Mapping the Supersession Chain to Your Engine Build

The replacement chain runs from 15841-35010 through 16851-35010, then 16851-35012, and most recently 16851-35014 (reference only). Each step in that chain corresponds to engineering revisions Kubota made across the D722, D782, D902, Z482, and related engine families. The Oil Pump 16851-35012 sits in the middle of this sequence and covers a broad range of E2B and E3B suffix variants. Confirming whether your specific engine serial falls within that coverage window is the first step before any order is placed.

What Physical Interfaces Decide Whether This Pump Actually Fits

Beyond the number itself, three physical features determine fitment on your block. First, the oil port position — inlet and outlet clocking relative to the mounting flange must align with your block casting, and variants within the same base number can differ by 90 degrees. Second, the drive spline count and engagement depth must match the timing gear on your specific engine suffix. Third, the mounting bolt pattern and flange thickness affect whether the pump seats flush against the block without shimming. [NEED_CITE: small diesel engine lubrication pump mounting interface standards] We verify all three against your engine model and serial before confirming compatibility.

Reading the Specs That Matter for Lubrication Performance

This Oil Pump is manufactured under ISO-certified production controls, meaning dimensional tolerances on the gear set, housing bore, and shaft seal seat are held to consistent standards across production runs. The pump delivers pressurized lubrication to the main bearings, connecting rod journals, and valve train across the D722-to-D902 displacement range. Adequate flow volume at operating RPM is critical — undersupply starves the top end first, typically showing as accelerated rocker arm wear before any oil pressure warning triggers. The three-month warranty covers manufacturing defects and provides a window to confirm proper pressure delivery under load after installation.

What Happens When the Wrong Variant Goes In

A pump that bolts on but has incorrect port clocking creates a mismatch at the oil feed line connection. The installer may force a hose at an angle, which introduces a stress point that fails under vibration within weeks. A pump with the wrong spline depth can partially engage the drive gear — it turns, it builds some pressure, but the incomplete engagement wears the gear teeth prematurely. [NEED_CITE: premature oil pump drive gear failure modes in compact diesel engines] These are not catastrophic failures on day one. They are the kind of hidden damage that surfaces two hundred hours later as low oil pressure or metal in the filter, leading the next technician to chase problems through the entire lubrication circuit.

Why Buyers Source This Part Through XUNPO

Our own production lines and qualified sourced supply carry identical QC and warranty terms, so the Oil Pump 16851-35012 you receive meets the same standard regardless of which facility produced it. Eight product categories under one account mean you can add filters, gaskets, and seal kits to the same order without juggling suppliers. One-piece minimum order removes the barrier when a single machine is down and you need one pump, not a case. Guangzhou warehouse stock on common Kubota lubrication items supports fast dispatch when the engine is already apart. Cross-reference verification covers the full supersession chain from 15841-35010 forward, catching mismatches before they ship. Sample units are available for physical fitment confirmation before you commit to a fleet quantity.

Documentation & Verification

• Commercial invoice and packing list referencing engine model and suffix variant for each unit
• Part compatibility and cross-reference sheet mapping 16851-35012 against superseded numbers (reference only)
• Dimensional inspection record covering port spacing, spline count, and flange thickness
• Three-month warranty terms included with shipment documentation
• Packing photographs showing each pump individually protected before crating
• HS code and customs classification support provided with export paperwork

Fitment Check Before Installation

• Compare oil port clocking on the new pump against the old unit before removing protective caps
• Verify drive spline tooth count and depth by sliding the pump into the timing gear housing by hand
• Check mounting flange bolt hole spacing against the block pattern with the old gasket as a template
• Confirm shaft rotation direction matches engine rotation — incorrect rotation will not build pressure
• If port orientation does not match, stop installation and contact us with your engine serial for variant exchange

Requesting a Fitment Verification

Send us the engine model and suffix designation from the nameplate — for example, D722-E2B or D902-E3B — along with the part number currently on the old pump. If the nameplate is worn or painted over, a photograph of the machine model plate and the pump mounting face is enough for our technical team to verify compatibility and confirm which variant in the supersession chain fits your build.

Frequently Asked Questions

Q: How do I confirm this oil pump fits my specific Kubota engine variant? A: Provide the full engine model including the suffix designation, such as D722-E2B or D722-E3B, along with the engine serial number if available. We cross-check the serial range against the variant coverage list and verify port orientation, spline configuration, and mounting pattern match your specific build before confirming the order.

Q: What is the difference between 16851-35010, 16851-35012, and 16851-35014? A: These numbers represent successive revisions Kubota made across engine generations. Each revision may involve changes to port clocking, drive spline depth, or housing casting. The Oil Pump 16851-35012 covers a defined range of E-series variants. We verify which revision your engine requires based on model and serial number rather than treating the numbers as universal substitutes.

Q: My old part number is 15841-35010 — is 16851-35012 the correct replacement? A: The number 15841-35010 sits at the beginning of the supersession chain and was used on earlier Kubota engine builds. While 16851-35012 (reference only) may cover your engine, confirmation depends on your specific model variant and production serial range. Send us the engine details and we will map the correct current replacement.

Q: Can I order a sample to check fitment before buying in bulk? A: Yes. A sample unit ships with the same QC documentation as production orders. Install it on one machine, verify port alignment, spline engagement, and oil pressure under operating conditions, then confirm the bulk order once physical fitment is validated on your equipment.