✅ Compatibility

• Make: Komatsu / Case / Dresser
• Compatible Engines: Cummins 4B 3.9L / Cummins 6B 5.9L / Komatsu S6D102E-1 diesel
• OEM / Cross Reference Part Numbers:
  • Komatsu: 6733-81-6510
  • Denso: 228000-6671, 9722809-667
• Fits Komatsu Wheel Loaders:
  • Komatsu WA120 — Cummins 4B 3.9L / 6B 5.9L diesel (1997–2006)
  • Komatsu WA180 — Cummins 4B 3.9L / 6B 5.9L diesel (1997–2006)
  • Komatsu WA180-3 — Komatsu S6D102E-1 diesel (1995–2006)
  • Komatsu WA250 — Cummins 4B 3.9L / 6B 5.9L diesel (1997–2006)
  • Komatsu WA253 — Cummins 4B 3.9L / 6B 5.9L diesel (1997–2006)
• Fits Case Wheel Loaders:
  • Case 521D — 390 diesel (1997–2006)
• Fits Dresser Wheel Loaders:
  • Dresser 510C / 515C / 520C — Cummins 6B 5.9L diesel (1985–1993)
• ⚠️ Critical — 24V System Only: This is a 24-volt starter motor. It is not compatible with 12V electrical systems. Verify your equipment’s electrical system voltage before ordering. Installing a 24V starter in a 12V system will cause immediate electrical damage.
• Note: Verify your equipment model, year, engine, and existing starter part number before ordering. Contact us with your equipment serial for fitment confirmation.

🔧 Product Highlights

• Direct OEM Replacement: Drop-in fit for Komatsu WA120 / WA180 / WA250 / WA253 and Case 521D / Dresser 510C-520C applications — matches original Denso OSGR 24V / 10-tooth CW, 4.5kW, 2-bolt 11mm unthreaded mount, wet clutch seal specifications
• Denso OEM Starter — Original Equipment Supplier for Komatsu WA-Series Wheel Loaders: Denso is the original equipment supplier for the Komatsu WA-series wheel loader starter motor — the 6733-81-6510 / 228000-6671 is the Komatsu / Denso OEM reference covering the WA120, WA180, WA250, and WA253 with Cummins 4B / 6B and Komatsu S6D102E-1 engines
• Cummins 6B 5.9L — The World’s Most Trusted Diesel Engine for Construction and Industrial Equipment: The Cummins 6B 5.9L is one of the most widely used and respected diesel engines in the global construction and industrial equipment industry — known for its legendary reliability, long service life, and broad application across Komatsu, Case, Dresser, and many other major equipment brands
• Komatsu WA-Series — Komatsu’s Most Iconic Wheel Loader Lineup: The Komatsu WA120 / WA180 / WA250 / WA253 are among the most widely used compact and medium wheel loaders in construction, mining, and quarrying applications globally — trusted for their Komatsu reliability and long service life
• 4.5kW High-Output 24V Starter — Built for Heavy-Duty Cummins and Komatsu Diesel Cranking: At 4.5kW on a 24V system, this starter delivers the high cranking power required by the Cummins 6B 5.9L and Komatsu S6D102E-1 in demanding construction and industrial environments
• Wet Clutch Seal — Heavy-Duty Industrial Specification: Equipped with a wet clutch seal for reliable operation in demanding construction and industrial environments
• Restores Reliable Engine Cranking: Corrects no-crank, slow cranking, and starter engagement failure on Komatsu WA-series / Case 521D / Dresser 510C-520C Cummins and Komatsu diesel applications

📦 What's Included

• 1× Starter Motor 24V / 10T OSGR CW 4.5kW (6733-81-6510 / 228000-6671) — New Aftermarket

🔑 Key Specs

• Komatsu Part Number: 6733-81-6510
• Denso Part Numbers: 228000-6671, 9722809-667
• Voltage: 24V
• Power: 4.5kW / 6.03HP
• Pinion Teeth: 10T
• Rotation: Clockwise (CW)
• Type: OSGR (Over-running Sprag Gear Reduction)
• Special Features: Wet clutch seal
• Weight: 19.12 lbs / 8.69 kg
• Compatible Engines: Cummins 4B 3.9L / Cummins 6B 5.9L / Komatsu S6D102E-1 diesel
• Compatible Equipment: Komatsu WA120 / WA180 / WA180-3 / WA250 / WA253 / Case 521D / Dresser 510C / 515C / 520C (1985–2006)
• Condition: New Aftermarket
• SKU: 6733-81-6510

⚠️ 24V system only — not compatible with 12V electrical systems. Installing a 24V starter in a 12V system will cause immediate electrical damage. Please verify your equipment’s electrical system voltage, engine, and existing starter part number before purchasing. Contact us with your equipment serial number if unsure.