Water Pump 1273085C91 1962912C1 | Direct Fit for CASE IH Tractor

Verified Cross-Reference — Dimensional check on port spacing and bolt pattern for CASE IH 234 through 1140 tractors prevents mating surface mismatch.

Technical Specifications

Application Suitability

Why Part Numbers Alone Cannot Confirm Fitment

A cross-listed pump number does not guarantee matching port orientation or gasket geometry across every serial range.

I have seen 1273085C91 appear in parts catalogues for the CASE IH 254, yet a machine with a late-build serial number carried a revised block face that shifted the coolant inlet by several millimetres. The pump bolted on, but the gasket did not seal. Relying on a single part number without serial-range verification leads to trial fitment on the shop floor, and a machine that sits idle while a replacement is sourced [NEED_CITE: common causes of tractor cooling system misfitment in aftermarket parts]. The same applies to 1962912C1 — it surfaces as a superseded or alternate reference depending on the catalogue edition, and the relationship between these two identifiers is not always consistent across third-party listings.

Model Range and Serial-Range Verification

The water pump for CASE IH tractor applications covers a span from compact utility models like the 234 up to the larger 1140 row-crop platform. Within that range, engine block castings evolved through production runs. A pump that seats cleanly on a mid-production 254 may encounter a revised thermostat housing flange on a later unit. Before confirming an order, the machine model and serial number together form the minimum identification set. A photograph of the existing pump mounting face or the engine block nameplate provides a secondary check when the stamped number is corroded or painted over.

Cross-Reference Between 1273085C91 and 1962912C1

These two identifiers appear interchangeably in different aftermarket and dealer catalogues. In most references, 1962912C1 supersedes 1273085C91, meaning the later number replaced the earlier one in updated parts lists. However, some application guides still list only the original number for earlier serial ranges. Both identifiers point to a pump with the same base dimensions and port layout for the majority of covered models, but confirming which number your specific machine's build documentation references eliminates ambiguity. We verify the cross-reference against multiple catalogue sources and flag any variant conflict before dispatch [NEED_CITE: aftermarket part number supersession tracking methodology].

Interface Verification: Bolt Pattern, Port Position, and Gasket

The mating interface on this water pump includes the bolt hole spacing, the coolant inlet and outlet port positions, and the gasket sealing surface profile. Even within the same base part number, production revisions can alter bolt hole diameter or shift a port a few degrees off the original clock position. The included gasket is cut to match the standard block face pattern for the listed models. Before installation, comparing the new pump's bolt circle and port alignment against the removed unit or the bare block face confirms whether the variant is correct. This step takes minutes and prevents the far longer downtime of draining coolant and re-pulling a misfitted pump.

Specification Details That Matter on the Bench

The pump ships with the gasket pre-matched to the housing flange, removing the need to source a separate seal and risk a thickness mismatch that affects impeller-to-volute clearance. The assembly is supplied new, meaning the bearing and seal have not been subjected to prior thermal cycling or coolant chemistry degradation. Impeller blade geometry determines coolant flow volume at a given engine speed — an incorrect impeller profile delivers adequate circulation at idle but fails under the sustained high-load conditions typical of plowing or PTO-driven implement work. The ISO-certified manufacturing process controls casting porosity and machining tolerances on the shaft bore and seal seat, both of which directly influence leak-free service life [NEED_CITE: ISO quality control standards for automotive-type water pump castings].

The Cost of Skipping Fitment Verification

Ordering a water pump based solely on a parts list lookup, without confirming serial range or port orientation, often results in one of two outcomes. The first is a pump that physically bolts on but leaves a gap at the gasket interface, causing a slow coolant leak that is not discovered until the tractor is back under load. The second is a pump that does not align at all, requiring a return shipment and a second order while the machine remains out of service. Both outcomes carry the same underlying cost: unplanned downtime during the window when the tractor is needed in the field [NEED_CITE: economic impact of agricultural equipment downtime during peak season].

Sourcing Advantages for This Application

This water pump is produced under the same quality and warranty terms as our in-house manufactured lines, so there is no distinction in after-sale support regardless of origin. A single account handles all cooling system components you may need alongside this pump — thermostats, hoses, belts — so one consignment covers the complete job. The minimum order is one piece, which matters when a single tractor is down and a full fleet order is not relevant. Our Guangzhou warehouse stocks common items for rapid dispatch, and for less common variants we can arrange a sample unit so you can physically verify fitment before committing to quantity. Cross-reference verification covering superseded and alternate numbers is handled by the technical team, who can also confirm grade and variant compatibility from a photograph of the old part or the machine nameplate.

Documentation & Verification

• Commercial invoice and packing list itemising each pump with its cross-reference number
• Part compatibility and cross-reference sheet linking 1273085C91 and 1962912C1 to specific CASE IH serial ranges
• Dimensional inspection record covering bolt circle, port spacing, and gasket surface flatness
• Warranty terms covering manufacturing defects for 3–12 months from dispatch
• Packing photographs showing protective wrapping and box labelling before collection
• HS code and customs documentation support for international shipment

Fitment Check Before Installation

• Compare bolt circle diameter and hole count on the new pump against the removed unit or bare block face
• Verify coolant inlet and outlet port clock positions match the existing hose routing
• Inspect the supplied gasket for correct hole alignment with both the pump and block mating surfaces
• Dry-fit the pump without sealant to confirm flush seating before final torquing
• If any dimension deviates, photograph the discrepancy and contact us before filling the cooling system

Identify the Right Variant for Your Machine

Provide your CASE IH tractor model, serial number, and — if available — the part number stamped on the existing pump or a photograph of the nameplate. This allows us to run a cross-reference check against both 1273085C91 and 1962912C1, confirm the correct variant for your serial range, and verify gasket compatibility with your specific engine block casting before any order is placed.

Frequently Asked Questions

Q: How do I confirm this water pump fits my specific CASE IH tractor model and serial number? A: Provide the machine model and serial number, and we cross-reference both 1273085C91 and 1962912C1 against the applicable build range. A photograph of the old pump's mounting face or the engine block nameplate provides additional verification. This two-step check confirms bolt pattern, port orientation, and gasket match before the unit ships.

Q: Part number 1273085C91 and 1962912C1 appear on different listings — are they interchangeable? A: In most references, 1962912C1 supersedes 1273085C91 as the updated identifier. Both numbers generally describe the same base pump, but some serial ranges reference only one. We verify which applies to your specific machine and flag any variant conflict so you receive a pump that matches your block casting.

Q: My old pump has a different number; can I use the tractor model alone to identify the correct replacement? A: The tractor model narrows the field, but production revisions within the same model can change bolt patterns or port positions. We need the serial number or a photograph of the old unit to confirm the exact variant. Model alone is a starting point, not a final confirmation.

Q: Does the included gasket match the engine block pattern for my specific tractor variant? A: The gasket supplied with this pump is cut to the standard block face profile for the listed CASE IH models. If your engine has been rebuilt with a non-standard block face or aftermarket sleeve, send us a photograph of the mating surface so we can confirm compatibility before dispatch.

Q: Can I order a sample to verify fitment before placing a larger order? A: Yes, the minimum order is one piece. We recommend ordering a single pump for physical fitment confirmation on the machine before committing to a fleet-level quantity. This eliminates the risk of bulk-receiving units that require return or modification.