Water Pump 1E051-73036 | Cross-Reference for Kubota D722 D902

Verified Cross-Reference — Superseded numbers 1E051-73036 and 1E051-73510 mapped against Kubota D722 and D902 engine block variants to confirm correct mating surface and port orientation before dispatch.

Technical Specifications

Application Suitability

Why the Same Part Number Ships in Multiple Variants

Water Pump 1E051-73036 for Kubota D722 D902 cross reference fitment demands serial-level verification, not just a model match.

Kubota revised this water pump designation across engine generations, circulating at least two primary reference numbers — 1E051-73036 and 1E051-73510 — in aftermarket catalogs. I have pulled pumps from D722 engines where the bolt circle was correct but the thermostat passage offset by a few millimetres, enough to block circulation even though every bolt went through [NEED_CITE: Kubota D722 engine block casting revision history]. The gasket 16871-73430 must match the mating flange exactly, and a reused or wrong-variant gasket will leak within operating hours.

Fitment Verification Across the Superseded Number Range

A Water Pump 1E051-73036 for Kubota D722 D902 cross reference fitment check begins with the engine serial plate, because Kubota produced the D722 and D902 with multiple casting revisions that share an external profile but differ in internal passage routing. The reference numbers 1E051-73036, 1E05173036, 1E051-73510, and 1E05173510 all appear in different service manuals for the same engine family, which creates confusion when a worn nameplate is the only starting point. We trace superseded number paths and confirm whether your existing pump carries a number that has been consolidated into the current production run.

Interface and Mating Surface Checkpoints

Before ordering, the mating flange profile, bolt hole count and spacing, coolant port orientation, and pulley hub depth must each be compared against your existing unit. I once had a Kubota D722 come in with what looked like the right pump — same bolt pattern, same part number on the box — but the outlet port was clocked fifteen degrees off, so the hose would kink under tension. The included gasket, cross-referenced as 16871-73430, seats against a specific flange face; if your block has been resurfaced during a prior rebuild, the gasket compression may differ [NEED_CITE: gasket torque specification after block resurfacing]. Sending a photograph of the old pump from three angles lets us confirm port position and spline engagement before anything ships.

What the Specifications Mean in Practice

The D722 and D902 are liquid-cooled diesel engines with different displacement ratings but overlapping coolant system architecture. This Water Pump 1E051-73036 for Kubota D722 D902 cross reference fitment must maintain adequate flow volume at the impeller to match the thermostat opening temperature and radiator capacity for each displacement. A pump with insufficient flow will show as gradual temperature creep under load rather than immediate overheating, making it hard to diagnose until cylinder head stress accumulates. The ISO-certified manufacturing standard ensures dimensional tolerances on the impeller and shaft seal match the original equipment envelope, which matters because even a small runout on the shaft accelerates seal wear and introduces coolant into the bearing cavity.

What a Wrong Variant Costs Beyond the Part

Ordering a water pump that bolts on but circulates poorly produces symptoms that overlap with a clogged radiator or a stuck thermostat, sending a technician down the wrong diagnostic path. The machine sits through multiple teardown cycles while the actual mismatch goes unnoticed. In the worst cases I have documented, an incorrect variant caused localized hot spots on the cylinder head that warped the mating surface — damage far exceeding the cost of verifying the correct pump before purchase [NEED_CITE: cylinder head warpage from uneven coolant distribution in compact diesel engines].

Why Source This Part Through Our Verification Process

Our Guangzhou warehouse stocks common Kubota cooling system components for fast dispatch, with a minimum order of one piece so a single emergency replacement ships without padding a batch. Both self-produced and sourced lines carry the same warranty terms across eight equipment categories, meaning you can add thermostats, hoses, or radiator caps to the same consignment. We identify the correct Water Pump 1E051-73036 for Kubota D722 D902 cross reference fitment from a part number, machine model, or a clear photograph of the existing unit and its nameplate. Cross-reference verification covers superseded and alternate numbers, and we offer sample supply for fitment confirmation before you commit to bulk volume. Our technical team confirms compatibility against your engine serial number and prior rebuild history.

Documentation & Verification

• Commercial invoice and packing list itemized by Kubota model compatibility for customs clearance.
• Part compatibility sheet listing verified cross-reference numbers (reference only) for D722 and D902 variants.
• Dimensional inspection record covering bolt spacing, port orientation, and flange flatness before dispatch.
• Warranty terms document covering manufacturing defects for 3-12 months from delivery date.
• Packing photographs showing gasket 16871-73430 inclusion and protective wrapping condition.
• HS code classification support for water pump assemblies entering your destination market.

Fitment Check Before Installation

• Compare bolt hole count and circle diameter against the removed pump before cleaning the block face.
• Verify coolant port clocking matches hose routing path without kinks or tension on fittings.
• Inspect the block mating surface for scoring or residual old gasket material that prevents flush seating.
• Align the included gasket 16871-73430 to confirm it covers all coolant passages without overhang into bolt holes.
• Hand-turn the impeller shaft after dry fitment to detect binding before torquing fasteners to specification.
• If port position or bolt pattern does not match, halt installation and send photographs for variant recheck.

Send Us Your Details for Fitment Confirmation

Provide your Kubota machine model, engine serial number for the D722 or D902, and a photograph of the existing pump if the nameplate is still legible. We will cross-reference your current part number against the full superseded range and confirm which variant matches your block casting.

Frequently Asked Questions

Q: How do I confirm this water pump fits my specific Kubota machine model and engine serial? A: Provide the engine serial number and machine model such as RTV-X900G or BX1880. We cross-reference the serial against Kubota D722 and D902 block casting revisions to confirm bolt pattern, port orientation, and gasket 16871-73430 compatibility before confirming fitment for your specific unit.

Q: My old pump has part number 1E051-73510 — is 1E051-73036 the correct replacement? A: Yes, 1E051-73036 and 1E051-73510 are cross-referenced (reference only) within the same Kubota D722 and D902 application range. Kubota superseded numbers across service manual editions. We verify which casting revision your engine carries to confirm the replacement seats correctly on your block.

Q: Why do multiple part numbers appear for the same application? A: Kubota revised the water pump designation across D722 and D902 engine generations, and aftermarket catalogs carry forward both old and new numbers. Our cross-reference table consolidates 1E051-73036, 1E05173036, 1E051-73510, and 1E05173510 so you can identify the correct current variant without guessing.

Q: I only have the machine model with no readable part number — can you confirm fitment? A: Yes. Send the machine model and a photograph of the existing pump showing the bolt pattern, port positions, and pulley hub. We match those visual identifiers against known Kubota casting variants for models like the ZD1011 or GR2120-2 to confirm the correct pump before dispatch.

Q: Can I order a sample to test fitment before placing a bulk order? A: Yes. We supply sample units for fitment verification so you can check bolt alignment, port orientation, and gasket 16871-73430 seating on your engine block before committing to larger quantities. This eliminates the risk of stocking an incorrect variant across a distributor inventory.