✅ Compatibility

• Make: Komatsu
• Engine: Komatsu 6D105 — 6-cylinder in-line diesel engine (first-generation Komatsu heavy excavator and loader engine platform)
• OEM / Cross Reference Part Numbers:
  • Komatsu OEM: 6136-61-1101, 6136-61-1102
• Fits Komatsu Hydraulic Excavators:
  • Komatsu PC200-1 — first-generation PC200 hydraulic excavator — Komatsu 6D105 engine
  • Komatsu PC200-2 — second-generation PC200 hydraulic excavator — Komatsu 6D105 engine
• Fits Komatsu Wheel Loaders:
  • Komatsu WA300-1 — first-generation WA300 wheel loader — Komatsu 6D105 engine
• ⚠️ Fitment Note: The Komatsu 6136-61-1101 and 6136-61-1102 are sequential OEM part numbers for the same water pump application — verify your machine serial number and engine serial number against the Komatsu parts book (WB) to confirm the correct number for your specific unit. Contact us for fitment confirmation.

🔧 Product Highlights

• Direct OEM Replacement — Komatsu 6136-61-1101 / 6136-61-1102 Water Pump for Komatsu 6D105 Engine in PC200-1 / PC200-2 Excavators and WA300-1 Wheel Loader: Drop-in fit for Komatsu 6D105-powered PC200-1, PC200-2, and WA300-1 machines — matching original Komatsu water pump specifications for correct coolant flow and engine cooling system function on the Komatsu 6D105 diesel engine platform
• Two Sequential Komatsu OEM Part Numbers — 6136-61-1101 and 6136-61-1102 — Covering Both Production Runs of the Komatsu 6D105 Water Pump: Komatsu issued two sequential part numbers (6136-61-1101 and 6136-61-1102) for the water pump in the 6D105 engine — reflecting a Komatsu design update or running change applied during the 6D105 production run. Both part numbers are cross-referenced here to ensure correct identification regardless of which Komatsu parts book edition or machine serial number range applies to your specific PC200-1, PC200-2, or WA300-1 unit
• Komatsu PC200-1 and PC200-2 — The Original Komatsu PC200 Generation That Launched the World’s Best-Selling Hydraulic Excavator Nameplate: The Komatsu PC200-1 and PC200-2 are the first and second generation of the Komatsu PC200 — the excavator model that launched one of the most successful and enduring product lines in construction equipment history. First introduced in the early 1980s with the Komatsu 6D105 engine, the PC200 established Komatsu as a global excavator leader and the nameplate has continued through eight generations to the present day. PC200-1 and PC200-2 machines are now in the classic equipment and long-service veteran category, maintained by operators in markets where machine longevity and rebuild economics are prioritised
• Komatsu 6D105 — The First-Generation Komatsu Heavy Excavator Diesel Engine That Powered the Original PC200: The Komatsu 6D105 is Komatsu’s first-generation 6-cylinder in-line diesel engine for the PC200 excavator and WA300 wheel loader — a robust and well-regarded engine that established Komatsu’s reputation for diesel engine reliability and longevity. Though now a legacy engine, the 6D105 remains in service in numerous markets across Southeast Asia, South Asia, Africa, and Latin America, where the original PC200-1 and PC200-2 machines continue to operate, driving ongoing demand for quality OEM replacement cooling system components
• Water Pump Failure on a Komatsu 6D105 — A Critical Cooling System Event That Can Lead to Engine Overheating and Serious Damage: The water pump is the primary driver of coolant circulation in the Komatsu 6D105 engine cooling system. A failing or failed water pump causes loss of coolant flow — leading rapidly to engine overheating, cylinder head warping, head gasket failure, and potentially severe internal engine damage if operation continues. Water pump replacement at the first sign of coolant leakage, bearing noise, or overheating is a critical preventive maintenance action for 6D105-powered machines, particularly in hot climates where cooling system stress is highest
• Komatsu WA300-1 — Komatsu’s First-Generation WA300 Wheel Loader in Active Long-Term Service Across Emerging Markets: The Komatsu WA300-1 is the first generation of Komatsu’s WA300 wheel loader series — powered by the Komatsu 6D105 engine. Like the PC200-1 and PC200-2, WA300-1 machines remain in operation across a wide range of markets where extended machine service life is standard practice, maintaining demand for quality OEM replacement cooling system components for the 6D105 engine platform

📦 What's Included

• 1× Water Pump — New Aftermarket (Komatsu 6136-61-1101 / 6136-61-1102)

🔑 Key Specs

• Komatsu OEM Part Numbers: 6136-61-1101, 6136-61-1102
• Compatible Engine: Komatsu 6D105 — 6-cylinder in-line diesel
• Compatible Equipment: Komatsu PC200-1 / PC200-2 hydraulic excavators — Komatsu WA300-1 wheel loader
• Application: Engine cooling system — hydraulic excavator / wheel loader — legacy / long-service machine maintenance
• Condition: New Aftermarket
• SKU: 6136-61-1101

⚠️ Please verify your Komatsu machine serial number and engine serial number against the Komatsu parts book before purchasing. The 6136-61-1101 and 6136-61-1102 are sequential OEM part numbers for the same water pump — confirm which applies to your specific machine. Contact us if unsure — we are happy to confirm fitment for your Komatsu 6D105-powered PC200-1, PC200-2, or WA300-1.