129100-42002 Emergency Replacement Water Pump for Komatsu 3D84 Engines

Machine Down? Get Your Komatsu 3D84 Back to Work Instantly

When your 3-to-4-ton Komatsu excavator or wheel loader is dead on the job site due to a blown water pump, every hour of downtime bleeds your profit margin and delays your project. You don't have time to deal with wrong parts, misaligned bolt holes, or slow dealership backorders. Engineered for absolute precision, the 129100-42002 Water Pump is your ultimate "Machine-Down" solution, designed to drop straight into your Komatsu 3D84 or Yanmar 3TNE84 block with zero modifications.

Fast, Flawless Fitment to Stop the Bleeding

• Guaranteed 1:1 OEM Match: During an emergency field repair, the part must fit the first time. This premium aftermarket pump strictly replaces OEM numbers 129100-42002, 129004-42001, 129327-42100, and 129001-42004. It matches the factory gasket profile perfectly, meaning your mechanic can bolt it on, refill the coolant, and turn the key.

• Severe-Duty Leak Prevention: Failed mechanical seals cause sudden coolant dumps. We’ve upgraded the internal seal and bearing assembly to withstand the brutal vibrations of heavy trenching and the constant shock loads of compact wheel loaders like the WA40-3.

• Ready for Immediate Dispatch: We understand the urgency of a broken-down machine. This component is stocked and ready for rapid shipping. Stop waiting for parts and start moving dirt again.

Urgent Fitment Verification Checklist

Verify your machine model against our cross-reference list below so we can ship the correct part today:

• Primary Emergency Part Number: 129100-42002 (YM129100-42002)

• Direct Interchange Numbers: 129004-42001, 129327-42100, 129001-42004, 129508-42001

• Engine Compatibility: Komatsu 3D84, 3D84E, 3D84E-5 / Yanmar 3TNE84, 3TNV84

• Komatsu Mini Excavators: PC20-5, PC30-5, PC30-7, PC30MR-2, PC35R-8, PC38UU-2

• Komatsu Wheel Loaders: WA30-5, WA40-3, WA50-3

• Komatsu Skid Steers: SK510-5

• Component Type: Engine Coolant Water Pump Assembly

• Installation: Direct Bolt-on / Drop-In Replacement

• Condition: 100% Brand New, Ready to Ship