Cummins ISC Oil Pump & Lubrication System Components

The Cummins ISC engine is a mid-range powerhouse widely used in marine and industrial applications. A reliable lubrication system is critical for maintaining oil pressure, reducing friction, cooling engine parts, and ensuring long service life under heavy load conditions.

The heart of this system is the oil pump, supported by the oil pan, oil cooler, oil filter, gaskets, and pressure monitoring devices. Each component works together to keep oil flowing correctly, prevent overheating, and safeguard the engine from catastrophic wear.

At Diesel Pro Power, we provide genuine Cummins ISC oil system parts—from pumps and screws to pans, coolers, filters, and pressure switches—trusted by more than 40,000 customers worldwide.

Oil Pumps for Cummins ISC Engines

The oil pump ensures that oil reaches all moving parts of the ISC engine. Cummins designed multiple versions depending on CPL (Control Parts List) numbers.

Cummins ISC Oil Pump – Flanged Shaft Design

This ISC oil pump uses a small drive gear with a flanged shaft.

• Compatible with engines built under CPL numbers 2237, 2475, 2691, 2693, 2694, 2695, 2946, 2964, 2995, 2996, 2997, 8056, 8145, 8146, 8151, 8152, 8153, 8185, 8222, 8292, 8307, 8380, and 8388.

• Designed to deliver consistent oil flow in heavy-duty ISC applications.

• Engineered for durability in both marine and stationary setups where continuous performance is required.

Cummins ISC Oil Pump – Holding Washer Shaft Design

Another ISC oil pump version uses a small drive gear supported by a shaft with a holding washer.

• Found in CPL ranges including 400, 401, 422, 424, 906, 915, 1096, 1286, 1404, 1632, 1738, 1754, 1793, 2722, 3093, 3144, 3169, 3175, 3212, 3301, 3517–3519, 3600, 3663–3665, 3735, 3823, 4524–4526, 8017, 8159, 8220, 8221, 8389, 8419, 8430, 8458, 8478, 8537, 8538, 8548, 8627, 8630, 8636, 8639, 8641, 8647, 8648, 8650, 8692–8698, 8703, 8728, 8730, 8746, 8780, and 8792.

• Designed for ISC engines requiring stable lubrication at high operating loads.

• Provides reliable oil circulation even in extended marine duty cycles.

Oil Pump Hardware

Cummins ISC Oil Pump Screws

Each ISC engine requires four mounting screws to secure the pump. These are precision-engineered to withstand vibration and thermal stress, ensuring the pump stays properly aligned and sealed to the block.

Oil Pans for Cummins ISC

Cummins ISC Oil Pan

The oil pan is the primary reservoir of the lubrication system. On the ISC, it is designed to:

• Hold sufficient oil for marine and industrial duty cycles.

• Resist vibration, thermal expansion, and corrosion.

• Provide a stable pickup for the oil pump to prevent cavitation or oil starvation.

Oil Coolers for Cummins ISC

Oil coolers regulate temperature by removing excess heat from the lubrication system, extending oil life and protecting engine components.

• 12 Plate Oil Cooler – Compact and efficient, commonly fitted to ISC engines for standard load conditions.

• 15 Plate Oil Cooler – Higher-capacity unit that provides improved cooling, ideal for ISC engines in high-output or marine continuous-duty use.

Oil Filtration for Cummins ISC

Cummins ISC Spin-On Oil Filter

• Diameter: 4.65 inches

• Height: 11.69 inches

• Thread Size: 2 1/4" – 12 UN
  This filter is designed to trap contaminants and maintain oil purity across the ISC’s lubrication system, protecting bearings, liners, and valve train components.

Oil Filter Removal Wrench

Essential for routine maintenance, this heavy-duty wrench is compatible with ISC oil filters and ensures secure removal without damaging the housing.

Gaskets & Seals for Cummins ISC Lubrication System

• Oil Cooler Cover Gasket (Standard) – Provides a secure seal at the oil cooler cover.

• Oil Cooler Cover Inner Gasket – Ensures internal oil routing within the cooler is leak-free.

• Rear Cover Gasket – Prevents leaks at the rear cover of the ISC lubrication system.

Oil Pressure Switches for Cummins ISC

Monitoring oil pressure is critical for safe operation. ISC engines use various pressure switches that trigger alarms or shutdowns if pressure drops too low.

• 5 PSI Pressure Switch – Low-pressure safeguard at idle.

• 10 PSI Pressure Switch – Standard operating protection.

• 20 PSI Pressure Switch – For ISC engines under higher load conditions.

• 27 PSI Pressure Switch – Used in ISC configurations requiring higher pressure monitoring, especially marine-duty setups.

Why Choose Diesel Pro Power for Cummins ISC Oil System Parts?

• Worldwide Customer Base – Trusted by more than 40,000 operators across marine and industrial applications.

• Fast Shipping – All ISC oil system parts ship same-day from our warehouse.

• Expert Guidance – Our team helps match the correct oil pump, gasket, or cooler to your ISC CPL.

• Marine & Industrial Focus – We specialize in engines like the Cummins ISC, avoiding the automotive-only focus of other suppliers.