Cummins 6CTA Engine Parts for Australia - Crankshaft Section

Crankshaft Components for Cummins 6CTA 8.3L Engines

The crankshaft is the foundation of the Cummins 6CTA 8.3L’s rotating assembly. It converts the linear motion of the pistons into the rotational power that drives your vessel or equipment. At Diesel Pro Power, we carry a complete lineup of crankshaft components for the Cummins 6CTA 8.3L, designed to meet or exceed OEM specifications for performance, reliability, and longevity.

Whether you're performing a full engine overhaul or replacing key rotating parts, our high-quality crankshafts, bearings, seal kits, and vibration dampers are trusted by thousands of marine, industrial, and off-highway professionals worldwide.

New Crankshaft Assemblies for Cummins 6CTA 8.3L

OEM-Spec Crankshaft for Cummins 6CTA 8.3L

We offer brand-new crankshaft assemblies for the Cummins 6CTA 8.3L engine, ready to drop in for rebuilds or replacements. These crankshafts are manufactured to Cummins' exacting tolerances, ensuring:

• Perfect alignment with main and rod bearings
  
  

• Precise balancing for low vibration
  
  

• Hardened and polished journals for oil film stability
  
  

• Long service life even under continuous-duty conditions
  
  

Whether you're maintaining a generator, marine propulsion system, or industrial pump drive powered by a Cummins 6CTA, our crankshafts provide a reliable solution with no core return required.

Crankshaft Bearing Shell Sets for Cummins 6CTA

Bearings are vital for maintaining the integrity and performance of your crankshaft. Our Cummins 6CTA crankshaft bearing kits include both upper and lower shells for all main journals, ensuring full support across the rotating assembly.

Standard Size Crankshaft Bearings

Use these if your crankshaft journals are still within standard wear limits. Precision-fit, corrosion-resistant, and made from durable bearing alloys, these STD-size shell sets are ideal for in-frame rebuilds or routine maintenance.

Oversize Bearing Shells – 0.25 mm and 0.50 mm

If your crankshaft journals have been machined, you’ll need oversize bearings. Diesel Pro Power stocks:

• 0.25 mm oversize shell sets for first-cut crankshafts
  
  

• 0.50 mm oversize shell sets for more extensive journal refinishing
  
  

Each set is engineered to support full oil film integrity and reduce metal-to-metal contact, even under heavy load.

Crankshaft Seal Kits for Cummins 6CTA 8.3L

Front Crankshaft Seal Kits

Diesel Pro Power offers two options for front crankshaft seal kits for the 6CTA:

• Standard kits with front seal and installation sleeve
  
  

• Kits tailored for non-automotive 6CTA 8.3L applications, ideal for marine and stationary engines
  
  

These front seal kits help prevent oil leaks from the crank nose, reducing the risk of crankcase pressure drops and protecting belt-driven accessories.

Rear Crankshaft Seal Kits

Rear seals are critical for preventing oil loss at the flywheel end of your Cummins 6CTA engine. Choose from:

• Standard rear crankshaft seal kits with integrated wear sleeve
  
  

• Kits for engines with dry clutch housings
  
  

• Kits for engines with wet clutch housings, using double-lip seals for enhanced oil retention
  
  

All kits are easy to install and include components designed to meet Cummins’ original performance standards.

Vibration Dampers for Cummins 6CTA Crankshafts

High rotational forces demand precise balance. Our vibration dampers for the 6CTA 8.3L are engineered to minimize harmonic distortion and torsional vibration.

Choose the correct damper size based on your engine’s configuration:

• 9.67" outside diameter damper with 4 bolt holes
  
  

• 8.97" outside diameter damper also with 4 bolt holes
  
  

These OEM-style dampers are critical for protecting your crankshaft from fatigue, especially in marine propulsion and generator applications where constant RPM operation is common.

Expansion Plug Kits for the 6CTA 8.3L Engine Block

Protect your engine block’s cooling and oil gallery passages with our Cummins 6CTA 8.3L expansion plug kit. This kit includes all necessary cup-style plugs to seal block openings during a rebuild or crankshaft replacement. It’s often replaced alongside the crankshaft to ensure full system integrity.

Why Choose Diesel Pro Power for 6CTA Crankshaft Components?

• OEM-quality components designed for industrial and marine duty
  
  

• All parts in stock and ready to ship from our U.S.-based warehouse
  
  

• Support from diesel engine experts with decades of 6CTA rebuild experience
  
  

• Trusted by 40,000+ customers across 180+ countries
  
  

We know the Cummins 6CTA 8.3L inside and out. Whether you’re replacing a failed crankshaft, upgrading components, or preparing for a complete in-frame overhaul, our crankshaft section includes everything you need for a reliable, leak-free, and balanced bottom end.