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Cummins ISB 4.5 Parts for Canada - Oil Section

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Cummins ISB 4.5 Oil Pump & Lubrication System Components

The Cummins ISB 4.5 engine is a four-cylinder, high-performance diesel engine widely used in industrial and marine applications. At the heart of its reliability is the oil pump and lubrication system, which ensures consistent oil flow to critical components such as the crankshaft, pistons, camshaft, and turbocharger. Proper oil circulation reduces friction, removes contaminants, and dissipates heat, making the lubrication system one of the most vital aspects of engine performance and longevity.

At Diesel Pro Power, we provide a complete range of oil pumps, oil coolers, filters, gaskets, and pressure monitoring components for the ISB 4.5. With over 40,000 satisfied customers worldwide, we are trusted to deliver genuine and aftermarket solutions that keep Cummins-powered equipment running at peak performance.

Oil Pumps for Cummins ISB 4.5

The oil pump is the centerpiece of the lubrication system, responsible for pulling oil from the sump and distributing it under pressure throughout the engine. Cummins ISB 4.5 engines were manufactured with variations in gear train design, so it is important to select the correct oil pump based on whether your engine uses a rear gear train or a front gear train.

Rear Gear Train Oil Pump

  • Designed for engines with a rear-mounted gear train.

  • Features 23/24 helix gear teeth for smooth engagement.

  • Provides reliable oil circulation at all operating conditions.

  • Common in CPL configurations such as industrial power units and certain marine variants.

Front Gear Train Oil Pump

  • Designed for engines with a front-mounted gear train.

  • Uses 22/24 straight gear teeth, optimized for front gear alignment.

  • Maintains strong oil flow and stable pressure under load.

  • Common in applications where compact front-access gear systems are used.

Both designs are precision-machined and built to handle the high loads and pressures that Cummins ISB 4.5 engines demand. Replacing a worn oil pump is crucial for preventing low oil pressure conditions, bearing wear, and eventual catastrophic engine damage.

Oil Coolers for Cummins ISB 4.5

Oil coolers regulate the temperature of engine oil by transferring excess heat into the cooling system. This is essential for engines working in high-demand environments, such as heavy-duty industrial equipment and marine propulsion systems, where oil can quickly overheat.

5-Plate Oil Cooler

  • Compact design, ideal for smaller industrial applications.

  • Provides efficient heat transfer while keeping oil flow stable.

7-Plate Oil Cooler

  • Larger cooling capacity than the 5-plate version.

  • Recommended for applications under sustained heavy load or higher ambient operating temperatures.

Rear Gear Train Oil Cooler (ISB & QSB Compatibility)

  • Specially designed for rear gear train engines.

  • Ensures balanced cooling across all oil passages.

A properly functioning oil cooler is critical for maintaining oil viscosity, preventing thermal breakdown, and extending the life of both the oil and the engine itself.

Gaskets & Seals for ISB 4.5 Oil System

The oil system relies on precise sealing components to prevent leaks and maintain pressure. At Diesel Pro Power, we carry gaskets for oil pick-up tubes, oil cooler covers, and filter heads, as well as oil cooler core gaskets.

Oil Pick-Up Tube Gasket

  • Ensures proper suction from the oil sump into the pump.

  • Prevents air intrusion, which can cause cavitation and loss of pressure.

Oil Cooler Cover Gasket

  • Provides a tight seal between the cooler housing and cover.

  • Prevents coolant and oil cross-contamination.

Oil Cooler Core Gasket

  • Heavy-duty sealing for the core of the oil cooler.

  • Available in both composite and metal gasket designs for enhanced durability.

Filter Head Gasket

  • Ensures a leak-free connection between the oil filter housing and engine block.

  • Vital for maintaining proper oil pressure and filtration efficiency.

Oil Filtration Components

A high-quality oil filter is essential for capturing contaminants and maintaining clean oil circulation. The Cummins ISB 4.5 uses a spin-on style oil filter that provides easy serviceability while maintaining tight filtration standards.

  • Spin-On Oil Filter

    • Standard size with optimal flow resistance.

    • Designed to trap fine contaminants while maintaining consistent oil flow.

    • Suitable for extended service intervals with high-efficiency filter media.

To assist with maintenance, we also supply oil filter removal wrenches designed to fit Cummins, Detroit Diesel, and Caterpillar engines. These tools allow quick and efficient removal of filters in tight engine compartments.

Oil Pressure Switches & Monitoring

Oil pressure monitoring is critical for detecting lubrication issues before they cause engine failure. The Cummins ISB 4.5 can be fitted with a range of fuel and oil pressure switches designed for different trigger points.

Each switch is compatible with Cummins and Detroit Diesel configurations, offering 1/8” NPT fittings for easy installation.

In addition to switches, we offer mechanical and electrical gauges for real-time oil pressure readings. Options include:

  • Mechanical gauges with alarms.

  • Electrical gauges in 12V and 24V configurations, suitable for a wide range of equipment.

Maintenance Tips for Cummins ISB 4.5 Oil System

To maximize the performance and lifespan of your ISB 4.5 engine:

  1. Regular Oil Pump Inspection – Replace pumps showing signs of wear such as low pressure or abnormal gear noise.

  2. Oil Cooler Maintenance – Flush coolers during major overhauls and replace plates if clogging or leaks are detected.

  3. Gasket Replacement – Always replace gaskets during servicing to prevent leaks and maintain proper sealing.

  4. Use OEM-Quality Filters – Inferior filters can restrict flow or allow contaminants to pass, risking engine damage.

  5. Monitor Oil Pressure – Install reliable gauges and switches to ensure early detection of lubrication problems.

Why Choose Diesel Pro Power for Cummins ISB 4.5 Oil Pumps & Parts

  • Largest Inventory – A complete catalog of Cummins ISB 4.5 oil pumps, coolers, filters, gaskets, and switches.

  • Worldwide Shipping – Fast delivery to over 180 countries.

  • Trusted by 40,000+ Customers – Backed by decades of experience in marine and industrial diesel support.

  • Expert Support – Our team provides guidance to ensure you select the right oil system components for your specific CPL and configuration.

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