Upgrade and restore your Komatsu or CASE engine performance with this premium Overhaul Rebuild Kit for Komatsu 4D104, S4D104-1, SA4D104, and SAA4D104 engines. Designed with high-quality components, this complete engine rebuild kit ensures long-lasting durability, efficient combustion, and reliable power output for heavy-duty machinery.
This rebuild kit is a direct fit replacement for a wide range of equipment, including Komatsu Backhoe Loaders (WB91R-5, WB93R-5, WB93S-5, WB97R-5, WB97S-5), Komatsu Telescopic Handlers (WH609-1, WH716-1, WH714H-1), CASE Backhoe Loaders (580M, 580N, 590SM), CASE Telehandlers (TX742, TX842, TX945), CASE Wheel Loaders (521D, 621D), and CASE Skid Steer Loader 435.
Each kit is manufactured to meet or exceed OEM standards, providing excellent sealing, compression, and wear resistance. Whether you’re performing a full engine rebuild or preventative maintenance, this kit delivers unmatched reliability and cost-effectiveness.
Kit Contents:
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Complete Overhaul Gasket Kit
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Semi-finished Cylinder Liners (set)
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Standard Pistons with Piston Rings
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Piston Pins & Snap Rings
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Connecting Rod Bushings
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Main Bearings, Rod Bearings & Thrust Washer
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Intake & Exhaust Valves with Valve Seats & Guides
✅ High-Performance Replacement – Restore power, reduce downtime
✅ Wide Compatibility – Fits Komatsu & CASE machinery
✅ Durable Build – Precision engineered for heavy-duty use
