3802561 6735-31-2111 Engine Piston Kit Fits Cummins 6BT5.9 Komatsu 6D102 PC200-6

Short Description / Bullet Points

Perfect Dual Compatibility:
100% perfectly fits both Cummins 6BT 5.9 and Komatsu 6D102 / S6D102E 12V diesel engines.
Interchangeable OEM Numbers:
Replaces Cummins OEM part numbers 3802561, 3928673, 3926631 and Komatsu part numbers 6735-31-2111, 6732-31-2410.
Precise Machine Application:
Designed for Komatsu PC200-6, PC200LC-6, PC220-6, WA320-3 loaders and excavators.
Premium Alfin Structure:
Features a high-quality dual Alfin iron insert in the top ring groove to resist extreme wear, high temperature, and deformation.
Complete Kit Included:
Each piston package comes complete with 1x Piston Body, 1x Wrist Pin, and 2x Retaining Circlips.

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Technical Specifications Table

Technical Parameter	Specification Details
Product Name	Diesel Engine Piston Kit / Piston Assembly
Engine Model	Cummins 6BT 5.9/ 6BTA 5.9 & Komatsu 6D102 / S6D102E (12V)
OEM Part Number (Cummins)	3802561/3928673/3926631/3920009
OEM Part Number (Komatsu)	6735-31-2111/6735-31-2110/6732-31-2410
Standard Cylinder Bore	102.0 mm (STD Size - Oversize +0.50mm/ +1.00mm available)
Piston Pin Diameter	40.0 mm
Material Type	High-silicon aluminum alloy with Alfin reinforcement
Surface Treatment	Graphite coated skirt or Anodized crown

Detailed Description

Restore your engine's combustion efficiency and compression with our premium 6D102 / 6BT5.9 Engine Piston Kit. Precision-manufactured using advanced high-silicon aluminum alloys, this heavy-duty aftermarket piston is engineered to withstand intense thermal stress and mechanical loads in demanding mining, construction, and transport operations.

Our pistons are treated with an advanced graphite coating on the skirt to reduce friction and eliminate scuffing during cold starts. Designed strictly to original OEM specifications, this kit ensures perfect weight balance across all cylinders for a smoother-running engine. Whether you are rebuilding a Komatsu PC200-6 crawler excavator or a 5.9L Cummins industrial truck engine, our overhaul parts guarantee exceptional longevity at an unbeatable value.