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Illustrative photo — the delivered item may differ in appearance. Orders are fulfilled by catalog part number (SKU).

Flywheel Assembly Cummins 3960742 | 3960755, 3960491, 4980922

Manufacturer: Cummins
Part#: 3960742-EN
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Ensure smooth engine operation and reliable power transfer with this premium flywheel assembly for Cummins 6CT 8.3 and ISL 8.9 engines. Features a pre-installed 158-tooth ring gear for seamless starter engagement.

Description

High-Performance Flywheel Assembly for Cummins 6CT & ISL Engines

Restore the efficiency and balance of your heavy-duty engine with this premium flywheel assembly. Engineered to meet or exceed demanding industry standards, this flywheel ensures smooth rotational inertia, reduces crankshaft vibration, and provides a reliable surface for clutch engagement. It comes complete with a pre-installed starter ring gear, making it a ready-to-install solution for your maintenance or rebuild project.

Key Features & Specifications

  • Perfect Fitment: Designed specifically for Cummins 6CT 8.3 and ISL 8.9 diesel engines.
  • Integrated Ring Gear: Includes a durable 158-tooth starter ring gear (compatible with part number 3907308) for reliable, consistent starter motor engagement.
  • Clutch Bolt Diameter: 450 mm, ensuring precise alignment and secure mounting.
  • Robust Construction: Manufactured from high-strength materials to withstand extreme thermal and mechanical stress in heavy-duty applications.

Compatible Engine Models

  • Cummins 6CT 8.3
  • Cummins ISL 8.9

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