Caterpillar 3406C Marine Engine Parts & Spares
Alfa Marine Spare Parts supplies Caterpillar 3406C marine engine parts and spares for commercial vessels, workboats, fishing vessels, tugboats, propulsion systems, auxiliary installations and marine generator applications.
We source genuine, OEM, replacement and applicable Reman Caterpillar 3406C parts, subject to availability, for scheduled maintenance, engine repairs, top-end overhaul and complete engine rebuild requirements.
Our sourcing capabilities cover fuel injectors, fuel injection parts, cylinder heads, pistons, piston rings, cylinder liners, connecting rods, bearings, crankshaft parts, camshaft parts, turbochargers, aftercooler parts, jacket-water pumps, sea water pumps, heat exchanger parts, oil pumps, oil coolers, filters, starters, alternators, gaskets, seals and overhaul parts.
The 3406C belongs to the wider Caterpillar 3400 Series Marine Engine Parts family.
For information about the complete engine platform, visit our Caterpillar 3406 Marine Engine Parts page.
For correct parts identification, provide the complete engine model, engine serial number, serial-number prefix, arrangement number and existing part number whenever available.
Need a specific Caterpillar 3406C part? Request a Quote or email request@alfamarinespareparts.com.
Caterpillar 3406C Engine Overview
The Caterpillar 3406C is an inline six-cylinder, four-stroke diesel engine within Caterpillar's long-established 3400 Series.
The marine propulsion version is mechanically governed and uses turbocharging and aftercooling.
Caterpillar currently lists the commercial marine propulsion 3406C with a power range of 365 to 400 bhp, equivalent to approximately 272 to 298 bkW, at 1800 rpm.
The engine uses:
- 6-cylinder inline configuration
- 4-stroke diesel cycle
- 137.2 mm cylinder bore
- 165.1 mm piston stroke
- 14.6-litre displacement
- Turbocharged-aftercooled aspiration
- Mechanical governor
- Heat-exchanger or keel-cooling arrangements
The 3406C is one of several generations within the wider 3406 platform:
- Caterpillar 3406
- Caterpillar 3406B
- Caterpillar 3406C
Parts should not automatically be treated as interchangeable between these engine generations.
For the complete family, visit our Caterpillar 3400 Series Marine Engine Parts page.
Caterpillar 3406C Technical SpecificationsSpecificationCaterpillar 3406CEngine manufacturerCaterpillarEngine model3406CEngine familyCaterpillar 3400 SeriesEngine type4-stroke dieselCylinder configurationInline 6Cylinder bore137.2 mmPiston stroke165.1 mmDisplacement14.6 LPower range365–400 bhp / 272–298 bkWRated speed1800 rpmAspirationTurbocharged-aftercooledGovernorMechanicalCoolingHeat exchanger or keel cooledOil refill capacity34 LOil change interval250 hoursApprox. dry weight1325 kgLengthApprox. 1454 mmWidthApprox. 914 mmHeightApprox. 1279 mmTypical applicationCommercial marine propulsion
Exact specifications and installed equipment can vary according to engine arrangement and application.
Caterpillar 3406C Parts & Spares
Alfa Marine Spare Parts can assist with a broad selection of Caterpillar 3406C engine parts for service, repair and overhaul requirements.
Cylinder & Internal Engine Parts
Available requirements can include:
- Cylinder heads
- Cylinder liners
- Pistons
- Piston rings
- Piston pins
- Connecting rods
- Connecting-rod bushings
- Main bearings
- Connecting-rod bearings
- Thrust bearings
- Crankshaft parts
- Camshaft parts
- Gaskets
- O-rings
- Seals
Major internal-engine parts should always be identified against the complete engine serial number and arrangement.
Caterpillar 3406C Cylinder Head Parts
Cylinder-head requirements can include:
- Complete cylinder heads
- Intake valves
- Exhaust valves
- Valve guides
- Valve seats
- Valve springs
- Rocker parts
- Injector-related parts
- Cylinder-head gaskets
- O-rings
- Seals
- Fasteners
For a complete top-end requirement, send the engine serial number together with the parts list or existing part numbers.
Caterpillar 3406C Pistons & Cylinder Liners
For engine repair and overhaul requirements, we can assist with applicable:
- Pistons
- Piston rings
- Piston pins
- Cylinder liners
- Liner seals
- Connecting rods
- Connecting-rod bearings
- Main bearings
- Thrust parts
- Gaskets
- O-rings
Although the 3406C shares the wider 3406 engine architecture, piston and liner requirements should still be verified against the individual engine.
Caterpillar 3406C Fuel System Parts
The 3406C marine propulsion engine uses a mechanically governed fuel system.
Fuel-system requirements can include:
- Fuel injectors
- Fuel nozzles
- Fuel injection parts
- Injection-pump parts
- Fuel priming pumps
- Fuel transfer pumps
- Fuel filters
- Governor parts
- Fuel lines
- Injector seals
- Fuel-system gaskets
- Fittings
Caterpillar's documented marine configuration includes a fuel priming pump, transfer pump, service fuel filter and fuel-ratio control.
Whenever possible, provide the existing injector, nozzle or fuel-system part number.
Caterpillar 3406C Fuel Injectors & Injection Parts
Fuel-system parts are among the more commonly requested requirements for older 3406-series engines.
When sourcing Caterpillar 3406C injectors or injection parts, provide:
Engine model: Caterpillar 3406C
Engine serial number:
Serial-number prefix:
Arrangement number:
Existing injector number:
Quantity:
Fuel-system requirements should not be selected only from the general “3406” designation because the 3406, 3406B and 3406C generations can differ.
Caterpillar 3406C Turbocharger Parts
The marine propulsion 3406C uses a turbocharged-aftercooled air system.
Turbocharger requirements can include:
- Complete turbocharger
- Applicable Reman turbocharger
- Turbocharger cartridge
- Turbine parts
- Compressor parts
- Bearings
- Seals
- Oil-feed parts
- Oil-return parts
- Intake connections
- Exhaust connections
- Mounting gaskets
The documented marine engine uses a water-cooled exhaust manifold and turbocharger arrangement.
Turbocharger identification should always be based on:
Engine Serial Number + Existing Turbocharger Number
Do not assume every turbocharger described for a Caterpillar 3406 platform fits the 3406C marine application.
Caterpillar 3406C Aftercooler Parts
The Caterpillar 3406C commercial propulsion engine uses turbocharging with aftercooling.
Aftercooler requirements can include:
- Aftercooler core
- Aftercooler housing
- End covers
- Gaskets
- O-rings
- Seals
- Air connections
- Cooling connections
- Mounting hardware
Caterpillar's documented marine configuration uses a corrosion-resistant aftercooler core.
For marine engines operating in demanding cooling environments, condition of the aftercooler and surrounding seals should be inspected during scheduled service.
Caterpillar 3406C Cooling System Parts
The 3406C marine propulsion engine can be configured with heat-exchanger cooling or keel cooling.
Cooling-system parts can include:
- Jacket-water pumps
- Sea water pumps
- Heat exchangers
- Expansion-tank parts
- Thermostats
- Aftercooler parts
- Oil coolers
- Cooling pipes
- Pump shafts
- Mechanical seals
- Bearings
- Gaskets
- O-rings
The documented standard marine configuration includes a gear-driven centrifugal jacket-water pump with expansion tank.
Cooling-system selection should still be verified against the actual vessel installation.
Caterpillar 3406C Jacket Water Pump Parts
The documented 3406C marine propulsion engine uses a gear-driven centrifugal jacket-water pump.
Applicable requirements can include:
- Complete jacket-water pump
- Pump shaft
- Mechanical seal
- Bearings
- Pump housing
- Gaskets
- O-rings
- Repair parts
Jacket-water pump requirements should be identified using the complete engine serial number and existing pump reference.
Caterpillar 3406C Sea Water Pump Parts
Caterpillar lists a sea water pump as optional equipment for applicable 3406C marine installations.
This means a sea water pump should not automatically be assumed to be fitted to every 3406C.
Applicable sea water pump requirements can include:
- Complete sea water pump
- Impeller
- Pump shaft
- Mechanical seal
- Bearings
- Pump housing
- Pump cover
- Gaskets
- O-rings
- Repair parts
Sea water pump selection can depend on:
- Engine serial number
- Engine arrangement
- Cooling configuration
- Vessel installation
- Existing pump number
For heat-exchanger-cooled installations, seawater circulates through the applicable external cooling circuit rather than being treated as the engine's closed-loop jacket coolant.
Caterpillar 3406C Heat Exchanger Parts
Caterpillar lists a heat exchanger as optional cooling equipment for applicable 3406C marine propulsion installations.
Heat-exchanger requirements can include:
- Heat exchanger assembly
- Heat exchanger core
- End covers
- Gaskets
- O-rings
- Seals
- Cooling connections
- Mounting parts
Heat-exchanger and keel-cooled engines should not automatically be treated as having the same cooling-system parts requirement.
Caterpillar 3406C Keel Cooling Parts
The documented standard cooling arrangement for the 3406C includes keel cooling with a jacket-water pump and expansion tank.
Applicable parts can include:
- Jacket-water pumps
- Expansion-tank parts
- Thermostats
- Cooling pipes
- Hoses
- Connections
- Seals
- Gaskets
The vessel's external keel-cooling arrangement can vary independently from the engine itself.
Caterpillar 3406C Oil Pump & Lubrication Parts
Lubrication-system requirements can include:
- Engine oil pumps
- Oil filters
- Oil coolers
- Oil-pressure regulators
- Oil lines
- Oil-pressure switches
- Crankshaft seals
- Gaskets
- O-rings
Caterpillar currently lists an approximately 34-litre refill capacity and a 250-hour oil-change interval for the documented commercial marine propulsion configuration.
Maintenance intervals should still follow the applicable engine documentation and operating conditions.
Caterpillar 3406C Crankshaft & Bearing Parts
Crankshaft and bearing requirements can include:
- Complete crankshaft
- Main bearings
- Connecting-rod bearings
- Thrust bearings
- Connecting rods
- Connecting-rod bushings
- Crankshaft seals
- Crankshaft gears
- Vibration-damper parts
- Associated hardware
For a high-value crankshaft requirement, provide:
Engine serial number + arrangement number + existing crankshaft number
Caterpillar 3406C Exhaust System Parts
The documented marine 3406C uses a water-cooled exhaust manifold.
Exhaust-system requirements can include:
- Exhaust manifold
- Exhaust manifold gaskets
- Turbocharger exhaust connections
- Exhaust flange
- Exhaust elbow
- Seals
- Clamps
- Fasteners
The standard documented exhaust system includes a 6-inch exhaust flange for the commercial propulsion configuration.
Installed vessel exhaust systems can still differ downstream of the engine.
Caterpillar 3406C Air Intake Parts
Air-intake requirements can include:
- Air cleaner
- Intake pipes
- Turbocharger inlet parts
- Aftercooler parts
- Intake manifold parts
- Hose connections
- Clamps
- Gaskets
- Seals
The documented 3406C marine propulsion configuration includes a turbocharger, aftercooler and air cleaner.
Caterpillar 3406C Starter & Alternator Parts
Caterpillar lists both 12 V and 24 V charging and starting options for the 3406C marine propulsion engine.
Electrical requirements can include:
- Starter motors
- Starter solenoids
- Alternators
- Charging-system parts
- Gauges
- Temperature switches
- Pressure switches
- Wiring
- Connectors
Before ordering a starter or alternator, verify:
- Engine serial number
- Existing part number
- 12 V or 24 V system
- Mounting arrangement
- Electrical connections
Caterpillar 3406C Instrument & Monitoring Parts
Applicable instrumentation can include:
- Engine oil-pressure gauges
- Water-temperature gauges
- Fuel-pressure gauges
- Service meters
- Tachometers
- Pressure switches
- Temperature switches
- Wiring
- Connectors
Older vessel installations may have had instrument systems replaced or modified, so the existing part number should be checked where possible.
Caterpillar 3406C Overhaul Parts
For a complete Caterpillar 3406C engine overhaul, Alfa Marine Spare Parts can assist with applicable:
- Cylinder liners
- Pistons
- Piston rings
- Piston pins
- Cylinder heads
- Intake valves
- Exhaust valves
- Connecting rods
- Main bearings
- Connecting-rod bearings
- Thrust bearings
- Crankshaft parts
- Camshaft parts
- Fuel-system parts
- Turbocharger parts
- Cooling-system parts
- Oil pumps
- Oil cooler parts
- Gaskets
- O-rings
- Seals
For a complete overhaul requirement, provide the engine identification together with the required parts list.
Caterpillar 3406C Top-End Overhaul Parts
Top-end overhaul requirements can include:
- Cylinder heads
- Intake valves
- Exhaust valves
- Valve guides
- Valve seats
- Valve springs
- Rocker parts
- Fuel injectors
- Injector seals
- Cylinder-head gaskets
- O-rings
- Seals
The final overhaul scope should be determined according to engine condition and inspection results.
Caterpillar 3406C Marine Applications
The Caterpillar 3406C commercial propulsion engine is suited to applicable marine propulsion installations requiring a mechanically governed heavy-duty inline-six diesel engine.
Applications can include:
- Commercial vessels
- Fishing vessels
- Workboats
- Tugboats
- Utility vessels
- Marine propulsion systems
The engine may also appear in other non-marine configurations, but parts for a marine engine should be identified against the marine engine serial number and arrangement, not simply another 3406C application.
Caterpillar 3406C vs 3406B
The Caterpillar 3406B and 3406C belong to the same wider 3406 engine family.
Both are inline six-cylinder diesel engines, but parts should not automatically be considered interchangeable.
Differences can exist in:
- Fuel-system parts
- Turbocharger arrangements
- Cylinder parts
- Cooling-system parts
- Pumps
- Electrical parts
- Internal-engine parts
For the previous generation, use the complete 3406B engine designation and serial number when identifying parts.
For the complete platform, visit our Caterpillar 3406 Marine Engine Parts page.
Caterpillar 3406C vs 3408
The 3406C and 3408 belong to the wider Caterpillar 3400 family, but use different engine configurations.
Caterpillar 3406C — inline six-cylinder
Caterpillar 3408 — V8
Many major internal-engine parts are therefore different.
For information about the complete engine family, visit our Caterpillar 3400 Series Marine Engine Parts page.
Caterpillar 3406C vs 3412
The 3406C and 3412 are also members of the Caterpillar 3400 family.
Their configurations are:
Caterpillar 3406C — inline 6
Caterpillar 3412 — V12
The 3412 uses a substantially different engine layout and parts requirement.
For twelve-cylinder requirements, visit our Caterpillar 3412 Marine Engine Parts page.
Caterpillar 3406C Within the 3400 Series
The 3406C forms part of Caterpillar's wider 3400 engine family.
Important members include:
EngineConfigurationCaterpillar 3406Inline 6Caterpillar 3406BInline 6Caterpillar 3406CInline 6Caterpillar 3408V8Caterpillar 3408BV8Caterpillar 3408CV8Caterpillar 3412V12Caterpillar 3412CV12Caterpillar 3412EV12
For information about the complete platform, visit our Caterpillar 3400 Series Marine Engine Parts page.
Caterpillar 3406C Parts Identification
Caterpillar maintains parts information specifically for the 3406C Marine Engine, but correct part identification still depends on the individual engine.
When requesting parts, provide:
Engine model: Caterpillar 3406C
Engine serial number:
Serial-number prefix:
Arrangement number:
Existing part number:
Part description:
Quantity:
For turbochargers, pumps, starters, alternators and externally mounted parts, photographs of the existing unit can also help.
The preferred identification sequence is:
Caterpillar 3406C + Engine Serial Number + Arrangement Number + Existing Part NumberWhy Source Caterpillar 3406C Parts From Alfa Marine Spare Parts?
Alfa Marine Spare Parts supports shipowners, ship managers, shipyards, marine engineers, repair companies, engine rebuilders and purchasing departments with Caterpillar 3406C parts and spares.
Depending on availability, we can assist with:
- Scheduled maintenance parts
- Fuel-system parts
- Cylinder parts
- Internal-engine parts
- Turbocharger parts
- Aftercooler parts
- Cooling-system parts
- Sea water pumps
- Jacket-water pumps
- Lubrication-system parts
- Electrical parts
- Top-end overhaul parts
- Complete overhaul requirements
- Genuine parts
- OEM parts
- Replacement parts
- Applicable Reman parts
For related Caterpillar engines, visit our Caterpillar 3400 Series Marine Engine Parts and Caterpillar 3406 Marine Engine Parts pages.
You can also browse our Caterpillar Marine Engine Parts & Rebuild Kits, Caterpillar Engine Parts Catalogue and Marine Spare Parts Catalogue.
Alfa Marine Spare Parts is an independent marine spare-parts supplier and is not an official Caterpillar dealer.
Frequently Asked QuestionsIs the Caterpillar 3406C Part of the 3400 Series?
Yes. The Caterpillar 3406C belongs to the wider Caterpillar 3400 Series.
Visit our Caterpillar 3400 Series Marine Engine Parts page for the complete family.
How Many Cylinders Does the Caterpillar 3406C Have?
The Caterpillar 3406C uses an inline six-cylinder configuration.
What Is the Caterpillar 3406C Displacement?
The marine propulsion 3406C has a displacement of approximately 14.6 litres.
What Is the Caterpillar 3406C Marine Power Rating?
Caterpillar currently lists the commercial propulsion engine at approximately 365–400 bhp, equivalent to 272–298 bkW.
What Speed Does the Caterpillar 3406C Run At?
The documented commercial marine propulsion configuration is rated at 1800 rpm.
Is the Caterpillar 3406C Mechanically Governed?
Yes. Caterpillar describes the commercial marine propulsion 3406C as a mechanically governed engine.
Is the Caterpillar 3406C Turbocharged?
Yes. The documented marine propulsion engine uses turbocharged-aftercooled aspiration.
Is the Caterpillar 3406C Heat Exchanger Cooled?
It can be.
Caterpillar documents heat-exchanger or keel-cooled arrangements for the marine propulsion engine.
Does the Caterpillar 3406C Use a Sea Water Pump?
A sea water pump is listed as optional equipment for applicable marine configurations.
Therefore, it should not be assumed that every 3406C engine uses the same sea water pump arrangement.
Are Caterpillar 3406B and 3406C Parts the Same?
Not necessarily.
Always verify the complete engine model, serial number, arrangement number and existing part number.
Can You Supply Caterpillar 3406C Overhaul Parts?
Yes. Depending on availability, we can assist with pistons, liners, rings, bearings, cylinder-head parts, fuel-system parts, turbocharger parts, pumps, gaskets, seals and other overhaul requirements.
Related Caterpillar Engine Pages
Caterpillar 3400 Series Marine Engine Parts
Caterpillar 3406 Marine Engine Parts
Caterpillar 3412 Marine Engine Parts
Caterpillar Marine Engine Parts & Rebuild Kits
Caterpillar Engine Parts Catalogue
Caterpillar 3512 Marine Engine Parts
Caterpillar 3516 Marine Engine Parts
Caterpillar C32 Marine Engine Parts
Request Caterpillar 3406C Marine Engine Parts
Looking for Caterpillar 3406C marine engine parts, maintenance spares or overhaul parts?
Send us:
Engine model: Caterpillar 3406C
Engine serial number:
Serial-number prefix:
Arrangement number:
Existing part number:
Part description:
Quantity:
Required condition: Genuine / OEM / Replacement / Reman where applicable
Delivery destination:
Required date:
If the part number is unknown, include photographs of the engine identification plate and existing part.
Email: request@alfamarinespareparts.com
For the complete family, visit our Caterpillar 3400 Series Marine Engine Parts page.
You can also visit our Caterpillar 3406 Marine Engine Parts and Caterpillar 3412 Marine Engine Parts pages.
Worldwide supply of Caterpillar 3406C parts for commercial vessels, workboats, fishing vessels, shipyards, marine repair companies and engine rebuilders.