Water Pump MM409302 / 1273085C91 for Mitsubishi, Case IH, Iseki, Satoh & Cub Cadet
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Compatible Models
We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.
| Brand / Family | Compatible Applications |
|---|---|
| Case IH | 234, 235, 244, 245, 254, 255, 1120, 1130 and related Mitsubishi-powered compacts |
| Iseki / Mitsubishi / Satoh | TX/MT/S-series applications using the matching pump |
| Other shared-engine applications | Selected Cub Cadet, Bolens, White and compact-equipment models |
Product Overview
Catalogs connect the same pump geometry to Case IH, Iseki, Mitsubishi, Satoh, Cub Cadet, Bolens and other compact equipment. Part number and engine configuration are more useful than trying to put every compatible brand in the title.
Matching replacement catalogs commonly include a mounting gasket; confirm the contents shown for this listing.
Key Features & Performance
- Maintains coolant circulation: Keeps coolant moving through the engine and radiator so heat can be rejected under working load.
- Serviceable wear point: Seal leakage, shaft play, bearing noise or pulley wobble are common reasons to replace an aging pump.
- Fitment by engine and pump geometry: Casting, hub height, pulley arrangement and reference number should match the original pump.
- Product-specific note: Matching replacement catalogs commonly include a mounting gasket; confirm the contents shown for this listing.
Technical Specifications
- Component: Engine coolant water pump
- Drive: Single V-belt style on matching replacements
- Configuration: Hub-type pump; pulley typically reused
Replaces / Reference Part Numbers
MM409302, MM409301, 1273085C91, 5650-040-9302-0, 33-0117323, 1873734, 3755813M91
Common Replacement Reasons
- Coolant leakage from the pump/weep area
- Bearing noise, shaft play or pulley wobble
- Overheating with belt, radiator, thermostat and coolant level otherwise checked
Frequently Asked Questions
How do I confirm this is the correct part?
Confirm engine model, hub/pulley arrangement and one of the listed cross-reference numbers before ordering.
Is this an OEM part?
Unless the listing is explicitly identified as genuine/OEM in the product data, treat it as a replacement component. Use the verified reference numbers, equipment application and physical configuration above to match your original part.
What should I check before installation?
This pump family is often associated with Mitsubishi S3L/S4L-era compact diesel installations.
Fitment note: Equipment manufacturers may use different components within the same model family based on engine, serial number or production date. Confirm the original part number and machine/engine details before ordering.