Skip to product information
12_c9c63801-4dd1-4bf5-9c65-2d821ca3af2a - Northline Parts

Water Pump MM409302 / 1273085C91 for Mitsubishi, Case IH, Iseki, Satoh & Cub Cadet

SKU: NLT2T01896
$84.29 In Stock
$84.29
Sale price  $84.29 Regular price 
Ships for free in 2–4 business days.
This water pump cross-references Mitsubishi MM409302 and Case IH 1273085C91 for a broad family of compact tractors and equipment using Mitsubishi diesel engines.
Estimated delivery between
Shop at Northline Parts Best Customer Service Best Online Parts

Let Northline Parts Do the Heavy Lifting for You!

Not sure which part you need? Our team can help you find the right replacement.

Parts Support Hours: Monday–Friday, 8:00 AM–5:00 PM CT

Live Chat: Available 24/7

I reached out for some replacement head bolts and they responded quickly with a few questions and cautionary information and is sending me some bolts. Great customer service! Thanks

Edward H. — Verified customer

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.

Compatible equipment / model
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.

Customers also purchased