Crankshaft & Related Components for Cummins ISM Engines

The crankshaft is the foundation of the Cummins ISM engine’s bottom end, responsible for converting linear piston movement into rotational power that drives industrial and marine equipment. A well-maintained crankshaft and its related components—such as bearings, seals, and gasket sets—are critical for ensuring smooth operation, minimizing vibration, and extending engine life.

At Diesel Pro Power, we supply high-quality Cummins ISM crankshaft assemblies, bearing sets, gasket sets, and seals designed for durability in the most demanding marine and industrial applications. With over 40,000+ satisfied customers worldwide, our catalog offers everything you need for a complete bottom-end rebuild.

Cummins ISM Crankshaft – New Replacement

The new Cummins ISM crankshaft is precision-machined and balanced for optimal performance. A new crankshaft eliminates the risks associated with regrinding or repairing worn units, providing a reliable foundation for your engine rebuild.

• Designed to OEM specifications for ISM engines

• High-strength forged steel construction for maximum durability

• Balanced to reduce vibration and ensure long-term reliability

• Compatible with select L10, M11, and QSM models where interchange applies

This crankshaft is ideal for operators seeking a complete replacement to restore performance, oil pressure stability, and smooth operation.

Upper Gasket Set for Cummins ISM

The upper gasket set includes all critical gaskets and seals required when servicing the top-end of your ISM engine. While not part of the crankshaft assembly directly, the upper set is often installed during rebuild projects that include crankshaft replacement to ensure full sealing integrity.

• Includes cylinder head gaskets, intake and exhaust gaskets, valve cover seals, and injector seals

• Prevents coolant and oil leaks in upper engine assemblies

• Compatible with Cummins ISM, as well as L10 and M11 series engines

Lower Gasket Set for Cummins ISM

The lower gasket set is specifically designed for bottom-end service, making it an essential companion to crankshaft replacement. It includes the seals and gaskets needed to properly reassemble the crankcase and oil pan.

• Contains oil pan gaskets, front and rear cover seals, and main bearing seals

• Ensures leak-free operation under high load and pressure conditions

• Recommended for complete crankshaft rebuilds or bearing replacements

Crankshaft Bearing Sets for Cummins ISM

A properly fitted crankshaft bearing set is critical to maintaining oil clearance, reducing friction, and preventing premature wear. Diesel Pro Power offers both standard and oversize bearing shell sets for Cummins ISM engines.

Standard Crankshaft Bearing Set

• Includes upper and lower main bearings for complete coverage

• Maintains correct oil clearance for crankshaft journals

• Best choice when crankshaft journals are within original specification

• Provides smooth rotation and reduced vibration under load

Oversize Crankshaft Bearing Set – 0.010”

When journals have been machined undersize during crankshaft repair, oversize bearings are required to maintain proper clearance.

• Designed for crankshafts machined 0.010” undersize

• Includes complete set of upper and lower shells

• Prevents excessive clearance that can cause oil pressure loss

Both standard and oversize bearing sets are engineered for long-lasting durability in ISM, M11, L10, and QSM applications.

Crankshaft Seal Kits for Cummins ISM

Oil leakage at the front or rear of the crankshaft can lead to contamination, pressure loss, and costly downtime. The crankshaft seal kits provide a complete solution with high-quality seals and sleeves to restore leak-free operation.

Rear Crankshaft Seal Kit

• Designed for later ISM engine models

• Includes both the seal and wear sleeve for proper installation

• Protects against oil leakage at the flywheel housing interface

• Resistant to heat and wear under heavy-duty operation

Front Crankshaft Seal Ring

• Simple but critical component that prevents oil leaks at the front gear cover

• Manufactured with heat-resistant materials for long service life

• Ensures a secure seal in high-vibration environments

Why Choose Diesel Pro Power for Cummins ISM Crankshaft Components?

• OEM-quality parts designed to meet or exceed Cummins specifications

• Fast worldwide shipping, ensuring reduced downtime for your vessel or equipment

• Expert support team available to help identify the correct crankshaft, bearings, or seals for your specific ISM configuration

• Proven reliability backed by 40,000+ satisfied customers in marine, industrial, and power generation industries