Water Pump U45017952 for Perkins 403C-15 404C-22 – Verified Fitment

Variant differences confirmed — coolant port orientation and mounting pattern verified against engine serial range before dispatch.

Technical Specifications

Application Suitability

Why the Same Water Pump U45017952 Ships in Multiple Variants Across Perkins 403/404 Engines

The base pump number alone does not guarantee fitment — engine serial range determines the correct port orientation and mounting pattern.

In Guangzhou warehouse operations, I have handled returns where the buyer matched the part number perfectly, yet the coolant inlet sat at a different angle from the block interface. Perkins 403C-15, 404C-22, 404C-22T, 403D-15, and 404D-22 engines share a common water pump family, but the transition between C-series and D-series introduced changes in port clocking and bolt-hole spacing [NEED_CITE: Perkins 403/404 series engine water pump variant differences across production years]. Copied cross-reference tables rarely flag these sub-variant distinctions, so a number that looks correct on paper sends the wrong physical configuration to the job site.

Serial Range Coverage and Cross-Reference Mapping

The Water Pump U45017952 covers a broad range of Perkins 403 and 404 engine variants including 403A-15, 404F-22, and the Shibaura J843 platform. Each variant may carry a different combination of the 13 cross-reference numbers listed above — for instance, 145010060 and 145010070 were assigned during early C-series production, while 145017951 and U45011030 appeared after mid-cycle updates. When a buyer provides only a machine model such as New Holland L213 or CASE SV185, I trace the engine serial range back through the build record to lock the exact pump variant before confirming compatibility. This prevents the common situation where an older superseded number points to a discontinued port configuration.

Interface Verification: Port Position, Bolt Pattern, and Pulley Alignment

The critical interfaces on this water pump are the coolant inlet/outlet orientation, the mounting bolt pattern, and the pulley shaft specification. A pump that matches the bolt circle but has the inlet rotated by even a slight offset will not accept the existing hose routing without forcing — and forcing cracks the casting. Before dispatch, I compare the port clocking angle against the engine build sheet or a photograph of the old unit still on the block. The pulley bolt torque specification must also align with the existing drive belt tension setup; a mismatch here causes premature bearing wear [NEED_CITE: coolant pump pulley alignment and belt tension effects on bearing life]. For machines operating in tight enclosures like skid steer loaders and compact track loaders, even minor dimensional discrepancies become installation blockers.

Specification Interpretation for Cooling System Demands

The impeller is cast from A380 high-silicon aluminum alloy, chosen for its thermal conductivity and resistance to cavitation erosion in continuous-duty coolant circulation. The carbon/ceramic mechanical seal faces provide reliable sealing under the thermal cycling typical of construction and agricultural duty cycles, while the Viton elastomer maintains flexibility across the -15°C to +50°C operating window and resists degradation from extended-life coolant formulations. The electrostatic epoxy-polyester hybrid paint finish, validated through salt spray resistance testing per ISO 9227, protects the external housing from corrosion in dusty, humid job-site environments. Coolant pressure rating up to 1.2 bar covers standard pressurized cooling systems found across the compatible Perkins and Shibaura engine families without risk of seal blowout under normal operating conditions.

The Hidden Cost of Ordering by Number Alone

When a water pump arrives with the wrong port orientation, the machine stays down while the return ships back and the correct variant is sourced. That is a second round of freight, a second round of waiting, and a second round of labor to pull the old unit again. In repair shops I worked in around the Pearl River Delta, forced-fitment attempts were common — operators would bend hose brackets or use sealant to bridge a gap. Those pumps typically leaked within weeks because the casting stress from misalignment compounded under thermal expansion [NEED_CITE: forced fitment effects on cast aluminum water pump housings in mobile equipment]. A sample unit sent for trial fitment before a bulk commitment eliminates this entire failure chain.

Why Source This Water Pump Through XUNPO

Own-production lines and qualified sourced supply operate under a single quality control protocol and a single warranty account, so whether the pump comes from our facility or a certified partner, the inspection standard is identical. Eight product categories under one account mean associated cooling system components — thermostat housings, coolant hoses, belt tensioners — can ship in the same consignment. Identification from a machine model, a worn nameplate photograph, or an engine serial number eliminates guesswork when the existing part number is unreadable. Cross-reference verification covers all 13 listed interchange numbers including superseded variants, catching errors that copied tables carry forward. Sample units are available for physical fitment confirmation on one machine before you commit to fleet-level quantities.

Documentation & Verification

• Commercial invoice and packing list referencing U45017952 and engine serial variant
• Part compatibility and cross-reference sheet covering all 13 interchange numbers (reference only)
• Dimensional inspection record for port spacing, bolt pattern, and pulley shaft runout
• Warranty terms document specifying coverage period and defect resolution procedure
• Packing photographs showing pump orientation and protective wrapping before crate closure
• HS code and customs documentation support for destination-country import requirements

Fitment Check Before Installation

• Compare coolant inlet and outlet port clocking against the old pump or engine block photograph before removing protective caps
• Verify mounting bolt hole spacing matches the block face — even slight deviation indicates a variant mismatch
• Check pulley shaft diameter and thread specification against the existing pulley and belt tensioner assembly
• Trial-fit the pump without sealant to confirm gasket seating and hose routing clearance
• If port orientation does not align, stop installation and contact us with engine serial number for variant exchange

Request a Fitment Verification

Provide your machine model, engine serial number, or a clear photograph of the existing water pump and nameplate. I will cross-reference the port orientation, bolt pattern, and pulley specification against the correct U45017952 variant and confirm compatibility before you place an order. For fleet-level purchases, request a sample unit for trial installation on one machine to validate fitment across your equipment group.

Frequently Asked Questions

Q: How do I confirm Water Pump U45017952 fits my specific Perkins engine or machine model? A: Provide the engine model, serial number, or a photograph of the existing pump and nameplate. I cross-reference the port orientation and bolt pattern against the specific engine build variant — Perkins 403C-15 and 404D-22 share the base number but may differ in coolant inlet clocking and mounting flange configuration.

Q: My old part number is different from U45017952 — is it still the right replacement? A: Likely yes. The 13 cross-reference numbers include superseded and alternate assignments from different production periods. Share your existing number and I will map it against the current variant, confirming whether port position and bolt pattern remain compatible with your engine serial range.

Q: Why does the same base pump number have multiple variants across 403/404 engine series? A: Perkins updated port orientation and mounting details between C-series and D-series production runs. The base casting family remained similar, but interface geometry shifted. Engine serial range — not just the base pump number — determines which physical configuration your machine requires.

Q: I only have a machine model with no readable part number — can you identify the right pump? A: Yes. Send the machine model and, if possible, a photo of the engine nameplate or the old pump mounting face. I trace the engine build code to determine the correct variant, covering New Holland, CASE, Shibaura, Terex, and Takeuchi platforms listed in the fitment table.

Q: Can I get a sample to verify fitment before ordering in bulk? A: Sample units are available for physical trial fitment on one machine. This lets you confirm port alignment, bolt pattern, and pulley compatibility before committing to a fleet-level order — particularly important when nameplates are worn or previous rebuilds have altered the original configuration.