Cummins 6C Engine Oil System Parts Catalog

The Cummins 6C diesel engine has a proven track record in both marine and industrial applications. Its durability and performance depend heavily on a reliable oil system that maintains consistent lubrication, cooling, and pressure under all operating conditions. The following catalog lists all Cummins 6C oil system parts currently available, organized for easy reference and CPL compatibility.

Cummins 6C Oil Pumps

Cummins 6C Oil Pump – Small Drive Gear with Flanged Shaft
This oil pump is built for Cummins 6C engines requiring a small drive gear secured by a flanged shaft. The flanged connection ensures secure gear retention for stable oil delivery across the entire RPM range, from low idle to full load. It is a trusted choice for marine propulsion systems where vibration and shock loads can challenge oil pump stability, as well as for industrial engines in continuous operation.

Its precision-machined gears work to maintain steady oil pressure even in long-duration runs, protecting crankshaft bearings, camshaft journals, and piston cooling nozzles from wear. This design is suited for engines operating in environments where consistent oil pressure is critical to reliability.

Compatible CPLs: 2, 602, 604, 831, 985, 1262, 1566, 1615, 1845, 1943, 1999, 2007, 2054, 2055, 2058, 2060, 2061, 2062, 2082, 2101, 2102, 2103, 2106, 2114, 2169, 2185, 2194, 2216, 2218, 2368, 2448, 2664, 2833, 2873, 2874, 2894, 8000, 8089.

Cummins 6C Oil Pump – Small Drive Gear with Holding Washer
This variant of the Cummins 6C oil pump features a small drive gear secured with a holding washer and bolt, providing reliable gear retention while allowing for easier service access. It is widely used in industrial configurations where regular inspection and service are part of the maintenance schedule, but it also performs well in marine auxiliary engines and propulsion units.

The holding washer design keeps the pump gear firmly in place under varying engine speeds and load conditions, ensuring the lubrication system can supply clean oil to all critical components. This oil pump supports dependable operation for fishing vessels, workboats, generator sets, and other heavy-duty 6C applications.

Compatible CPLs: 400, 401, 422, 424, 906, 915, 1096, 1286, 1404, 1632, 1738, 1754, 1793, 2722, 3093, 3144, 3169, 3175, 3212, 3301, 3517, 3518, 3519, 3600, 3663, 3664, 3665, 3735, 3823, 4524, 4525, 4526, 8017, 8159, 8220, 8221, 8389, 8419, 8430, 8458, 8478, 8537, 8538, 8548, 8627, 8630, 8636, 8639, 8641, 8647, 8648, 8650, 8692, 8693, 8695, 8697, 8698, 8703, 8728, 8730, 8746, 8780, 8792.

Cummins 6C Oil Pump Mounting Hardware

Cummins 6C Oil Pump Mounting Screw
Four screws are used per engine to secure the oil pump to the block. These mounting screws are manufactured to hold torque under the heat cycles and vibration typical of Cummins 6C operation, whether installed in a marine engine room or in a stationary industrial plant. Replacing the screws when changing the oil pump ensures proper clamp force and long-term reliability.

Cummins 6C Oil Pan

Oil Pan for Cummins 6C
The oil pan serves as the primary oil reservoir for the Cummins 6C lubrication system. Designed with internal baffles, it keeps oil surrounding the pickup tube under conditions of vessel pitch and roll or when industrial machinery is operating on uneven ground. A secure seal at the pan-to-block interface prevents leaks that could compromise oil pressure. This pan fits directly to Cummins 6C engines in both marine and stationary configurations.

Cummins 6C Oil Cooling Components

Cummins 6C Oil Cooler – 12 Plate
The 12-plate oil cooler for the Cummins 6C provides high-efficiency heat transfer, lowering oil temperature during prolonged operation. Oil passes through the stacked plate assembly, where heat is transferred into the coolant circuit. Stable oil temperature helps maintain proper viscosity, extending the life of bearings and other precision surfaces. This cooler is commonly installed on Cummins 6C marine propulsion engines and generator sets where heavy loads are sustained for hours.

Cummins 6C Oil Cooler Gasket
This gasket creates a tight seal between the oil cooler housing and the block, preventing leaks and keeping oil and coolant circuits separate. A secure seal is essential for maintaining oil pressure and preventing contamination.

Cummins 6C Oil Cooler Cover Gasket
Available in both standard and inner gasket styles, these gaskets seal the cooler cover to the housing. A proper seal here is necessary to keep the cooler operating efficiently and to prevent oil seepage that could lead to pressure loss.

Cummins 6C Rear Cover Gasket
This gasket seals the rear cover in the Cummins 6C oil system. By maintaining an airtight seal, it ensures oil pressure remains within specifications for optimal engine performance.

Cummins 6C Filtration Components

Cummins 6C Spin-On Oil Filter
A high-capacity, full-flow spin-on oil filter for Cummins 6C engines. With a 4.65-inch diameter, 11.69-inch height, and 2 1/4"-12 UN thread, it traps contaminants before they can circulate through the lubrication system. The spin-on design allows quick replacement to keep oil clean and protect critical components in marine and industrial duty cycles.

Oil Filter Removal Wrench for Cummins 6C
An adjustable wrench designed to fit oil filters between 4-21/32 inches and 5-5/32 inches in diameter. This tool makes filter removal easier in tight engine spaces often found in marine Cummins 6C installations.

Cummins 6C Corrosion Protection

Zinc Anode for Cummins 6C Oil Coolers
A brass plug with a replaceable zinc core, 1 inch in length with NPT 3/8” threading. This zinc anode protects the internal passages of Cummins 6C oil coolers from galvanic corrosion in saltwater environments. It should be inspected and replaced regularly for continued protection in marine service.

Cummins 6C Oil Pressure Monitoring

Cummins 6C Fuel & Oil Pressure Switch – 5 PSI Make/Break
Triggers an alarm or shutdown circuit when oil pressure drops to 5 PSI, providing a safeguard for engines with low idle pressure requirements.

Cummins 6C Fuel & Oil Pressure Switch – 10 PSI Make/Break
Activates alerts at 10 PSI, offering early warning for engines operating with higher minimum pressure specifications.

Cummins 6C Fuel & Oil Pressure Switch – 20 PSI Make/Break
Provides protection at a 20 PSI threshold, suitable for applications requiring more conservative pressure monitoring.

Cummins 6C Fuel & Oil Pressure Switch – 27 PSI Make/Break
The highest standard threshold available, activating at 27 PSI to protect engines with elevated lubrication demands.

Cummins 6C Mechanical Oil Pressure Gauge
A direct-reading gauge for monitoring oil pressure in real time, offering reliable readings without electrical components.

Cummins 6C Electrical Oil Pressure Gauge – 12 Volt
Designed for installations where oil pressure needs to be monitored from a remote station on 12-volt systems.

Cummins 6C Electrical Oil Pressure Gauge – 24 Volt
Similar to the 12-volt version but built for 24-volt electrical systems, common in commercial marine applications.

Cummins 6C CPL Compatibility Guide

Flanged Shaft Oil Pump CPLs:
2, 602, 604, 831, 985, 1262, 1566, 1615, 1845, 1943, 1999, 2007, 2054, 2055, 2058, 2060, 2061, 2062, 2082, 2101, 2102, 2103, 2106, 2114, 2169, 2185, 2194, 2216, 2218, 2368, 2448, 2664, 2833, 2873, 2874, 2894, 8000, 8089.

Holding Washer Oil Pump CPLs:
400, 401, 422, 424, 906, 915, 1096, 1286, 1404, 1632, 1738, 1754, 1793, 2722, 3093, 3144, 3169, 3175, 3212, 3301, 3517, 3518, 3519, 3600, 3663, 3664, 3665, 3735, 3823, 4524, 4525, 4526, 8017, 8159, 8220, 8221, 8389, 8419, 8430, 8458, 8478, 8537, 8538, 8548, 8627, 8630, 8636, 8639, 8641, 8647, 8648, 8650, 8692, 8693, 8695, 8697, 8698, 8703, 8728, 8730, 8746, 8780, 8792.