Matched Set Dispatch — Gasket verified against CASE IH engine block mating surface before shipment, preventing open-block wait scenarios on 234 through 275 tractors.
Technical Specifications
| Parameter |
Value |
| Part Number |
1273085C91 1962912C1 |
| Product Type |
Water Pump |
| Cross-Reference |
1273085C91, 1962912C1 (reference only) |
| Machine Fitment |
234, 235, 244, 245, 254, 255, 265, 275, 1120, 1130, 1140 |
| Condition |
New Aftermarket |
| Included Components |
Water Pump, Gasket |
| Brand Compatibility |
Fits CASE IH |
| Warranty |
3–12 months against manufacturing defects |
| Manufacturing Standard |
ISO-certified manufacturing |
Application Suitability
| Engine System |
Related Components |
| Coolant circulation and heat rejection |
Thermostat, radiator hoses, fan clutch, coolant |
| Overheating diagnosis and repair |
Temperature sensor, radiator cap, bypass hose |
| Scheduled cooling system refresh |
Belt tensioner, coolant filter, hose clamps |
| Full engine overhaul cooling stage |
Core plugs, freeze plugs, block heater element |
Overheating Recurrence After a Water Pump Swap
A replacement water pump engine cooling system replacement alone rarely solves the root cause.
When a tractor arrives at the shop with repeated overheating after a pump change, the pattern is almost always the same: the thermostat was not pulled and checked, or a collapsed lower radiator hose is restricting flow at high RPM. On CASE IH models like the 244 and 255, the cooling circuit passes through tight bends in the block, and scale buildup in those passages will starve the new pump just as it starved the old one. Repair centres that address only the failed component see the machine back on the lift within a season [NEED_CITE: engine cooling system root cause analysis for agricultural diesel tractors]. This water pump sits at the centre of the engine cooling system; supplying it with matched gaskets and related cooling components ensures the overhaul addresses the root cause of overheating rather than swapping a single failed part in isolation.
Cooling Circuit Position and Adjacent Components
The pump drives coolant through the block and head passages, pulling from the lower radiator hose and pushing through the thermostat housing into the upper radiator. When this component is removed during a water pump engine cooling system replacement, the technician has direct access to the thermostat, the bypass hose, and the front face of the block — all of which should be inspected and, where warranted, replaced in the same teardown. Addressing these items together means the engine is disturbed once, sealed once, and tested once.
Gasket Integrity and Block Mating Surface
The included gasket is selected to match the sealing surface specification of the compatible CASE IH engine blocks. Before assembly, the block face must be checked for residual adhesive, pitting, or distortion from a previous overheating event. A gasket compressed against an uneven surface will leak externally or, worse, allow coolant to migrate into the oil gallery. Verify gasket material against the engine build record — an earlier rebuild may have altered the mating surface tolerance [NEED_CITE: cylinder block deck surface flatness tolerances for heavy-duty diesel engines].
Understanding Why the Previous Pump Failed
Bearing wear on the old pump often traces back to a misaligned belt drive or an overtensioned accessory belt. Impeller erosion, by contrast, points to contaminated coolant or an incorrect water-to-antifreeze ratio that has allowed cavitation over thousands of hours. Identifying the failure mode before fitting the new unit prevents the replacement from inheriting the same destructive conditions. A water pump engine cooling system replacement that ignores the belt path or fluid condition is a repair that has not actually been completed.
Impeller Design and Flow Characteristics
The impeller inside this unit is engineered to move coolant volume at the flow rates demanded by CASE IH diesel engines operating under high-load agricultural conditions — plowing, hauling, and continuous PTO operation in elevated ambient temperatures. The blade profile and housing volute work together to maintain consistent pressure across the RPM range, avoiding the low-flow cavitation that accelerates impeller pitting. The bearing assembly supports the shaft under radial belt load while maintaining seal face contact to prevent weeping.
The Cost of Overlooking the Cooling System as a Whole
Installing a new pump without replacing the thermostat means a stuck-open valve can keep the engine below operating temperature, increasing fuel consumption and soot loading on the piston rings. A partially collapsed hose may not show symptoms at idle but will choke flow under field load, bringing the machine down mid-shift. These repeat failures are not pump failures — they are system failures disguised as component failures, and each one costs a full day of unplanned downtime [NEED_CITE: agricultural tractor cooling system failure cascade patterns].
Why Source This Pump Through XUNPO
Our production lines and qualified sourced supply operate under a single warranty account, so the water pump and its matched gasket carry the same QC terms. Eight product categories mean the thermostat, hoses, and seal kits for the same CASE IH job ship in one consignment. Minimum order is one piece — a single emergency unit or a full fleet overhaul kit, on the same terms. The Guangzhou warehouse stocks fast-moving cooling items for rapid dispatch. Part identification works from the number, the machine model, or a photograph of the nameplate when paint has covered the stamping. Cross-reference verification covers the relationship between 1273085C91 and 1962912C1, including superseded numbers that may appear in older service manuals. Technical staff confirm engine serial variants and grade compatibility before the order is committed.
Documentation & Verification
- Commercial invoice and packing list with pump and gasket line items itemized by engine serial
- Part compatibility sheet listing 1273085C91 and 1962912C1 as cross-reference only
- Quality inspection record covering impeller balance and bearing runout measurements
- Warranty terms covering manufacturing defects for the stated period
- Packing photographs showing the pump and gasket secured against transit damage
- HS code and customs documentation support for international clearance
Installation & Rebuild Sequence
- Clean the block mating surface and verify flatness before positioning the included gasket
- Torque pump mounting bolts in the manufacturer-specified sequence to avoid housing distortion
- Inspect thermostat operation and belt alignment before refilling the cooling circuit
- Fill with the correct coolant mix, bleed air from the system, and run to operating temperature
- Check for external weepage at the gasket line and weep hole during the initial heat cycle
- Re-torque mounting bolts after the first full cool-down if specified by the engine service manual
Request a Fitment-Verified Quote
Provide your CASE IH tractor model, engine serial number, and any previous overhaul history so we can confirm the correct pump variant and gasket specification. If the nameplate is worn, a clear photograph of the engine block casting number or the old pump allows our team to complete the identification. Rebuild shops and repair centres quoting a full cooling system refresh can submit the complete job list for consolidated matching.
Frequently Asked Questions
Q: What other cooling system components should be replaced alongside this water pump?
A: The thermostat, upper and lower radiator hoses, and hose clamps should be inspected during the same teardown. On higher-hour CASE IH engines, the fan clutch and coolant temperature sensor are also candidates. Replacing these as a matched set during a single water pump engine cooling system replacement prevents a second disassembly when an adjacent component fails weeks later.
Q: How do I confirm which part number applies to my specific engine serial?
A: The numbers 1273085C91 and 1962912C1 serve as interchange references, but engine serial variants within the same tractor model may use different mounting patterns or port orientations. Provide the full engine serial from the block stamping or the machine data plate, and our technical team will confirm the correct variant before dispatch.
Q: What caused the original pump to fail, and how do I prevent recurrence?
A: Bearing wear usually traces to belt misalignment or excessive tension. Impeller erosion points to contaminated coolant or an incorrect antifreeze ratio. Inspect the belt path and flush the cooling system before fitting the replacement to ensure the new pump does not inherit the conditions that destroyed the original.
Q: Does the included gasket match my engine block sealing surface specification?
A: The gasket is selected for compatibility with CASE IH engine blocks in the listed models. If the block has been machined during a previous overhaul, verify deck surface flatness and confirm that the gasket thickness remains appropriate for the altered mating dimension before assembly.
Q: Can I get a sample to verify fitment before committing to a bulk order?
A: Sample units are available for fitment confirmation against your specific engine build. This is particularly useful when dealing with superseded part numbers or engines that have been modified during prior rebuilds. Fit the sample, verify port alignment and bolt pattern, then proceed with confidence on the full order.
