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CAT turbocharger 245-9734 | 10R-1965: TURBO GP BAS
Quote reference: Part No. 245-9734 | 10R-1965
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Product Description
Introduction To Caterpillar Turbocharger 245-9734: Turbo GP BAS
Caterpillar 245-9734 C32 Marine Turbocharger – 10R-1965 Reman
The Caterpillar 245-9734 Turbocharger is a basic turbocharger group used on selected Caterpillar C32 marine engines and C32 marine auxiliary applications. It is also associated with selected C18 and 3412D marine engines.
For customers looking for a remanufactured alternative, the corresponding Cat Reman turbocharger is 10R-1965 / 10R1965.
The turbocharger is an essential part of the engine's air and combustion system. Exhaust-gas energy drives the turbine, which in turn drives the compressor and increases the quantity and density of air supplied to the engine.
For Caterpillar C32 engine components, visit:
Caterpillar C32 Marine Engine Parts
Product InformationSpecificationDetailsMain Part Number245-9734Number Without Hyphen2459734ProductBasic Turbocharger GroupReman Part Number10R-1965Reman Without Hyphen10R1965Primary Marine ApplicationCaterpillar C32Additional Marine ApplicationsC18, 3412DMarine AuxiliaryC32Generator ApplicationsC18, C32SystemEngine Air / Turbocharger SystemAvailable OptionsNew, Remanufactured & replacement options subject to availabilityCaterpillar 245-9734 Turbocharger
The 245-9734 / 2459734 turbocharger is designed to increase engine airflow by using energy contained in the exhaust gases.
As exhaust gases leave the cylinders, they pass through the turbine side of the turbocharger. The turbine drives the compressor wheel, which compresses incoming air before it enters the engine.
Increasing the mass of available combustion air allows the engine to efficiently burn the required amount of fuel and develop its rated output.
On a high-output marine diesel engine such as the Caterpillar C32, correct turbocharger performance is especially important when the engine is operating under sustained load.
Caterpillar 10R-1965 Reman Turbocharger
The confirmed Cat Reman alternative associated with 245-9734 is:
10R-1965 / 10R1965
The important cross-reference is therefore:
245-9734 → 10R-1965 Cat Reman Turbocharger
The 10R-1965 is associated with selected:
- Caterpillar C32 marine engines
- Caterpillar C32 marine auxiliary engines
- Caterpillar C18 marine engines
- Caterpillar 3412D marine engines
- C18 and C32 generator-set applications
When sourcing a replacement for an existing 245-9734, both the new and Reman numbers should therefore be checked.
Compatible Marine EnginesCaterpillar C32 Marine Engine
The Caterpillar C32 Marine Engine is one of the primary applications for the 245-9734 turbocharger.
The C32 has been produced in different ratings and engine arrangements. For that reason, 245-9734 should not be assumed to fit every C32.
The complete engine serial number and arrangement should be checked before ordering.
Caterpillar C18 Marine Engine
Selected Caterpillar C18 marine configurations are also associated with the 245-9734 / 10R-1965 turbocharger family.
Caterpillar 3412D Marine Engine
The 245-9734 and 10R-1965 also appear in selected Caterpillar 3412D marine applications.
This illustrates why turbocharger identification should be based on the actual part number and engine configuration rather than engine displacement or appearance alone.
Other Caterpillar C32 Turbocharger Part Numbers
The Caterpillar C32 marine engine family can use other turbocharger configurations.
Other confirmed C32 turbocharger families include:
TurbochargerRemanApplication130-9725 / 130972510R-8236 / 10R8236Selected C30 / C32 Marine245-9734 / 245973410R-1965 / 10R1965Selected C32 Marine / Marine Auxiliary287-7210 / 287721010R-3092 / 10R3092Selected C30 / C32 Marine / C32 AuxiliaryImportant Compatibility Note
These numbers represent different C32 turbocharger configurations.
They should not be interpreted as meaning that 130-9725, 245-9734 and 287-7210 are automatically interchangeable.
For example:
245-9734 → 10R-1965
is the relevant new/Reman relationship for this product page.
Likewise:
287-7210 → 10R-3092
belongs to another C32 turbocharger configuration.
Correct identification should always be based on the engine serial number, arrangement number and existing turbocharger number.
Caterpillar 130-9725 / 10R-8236
Another turbocharger family encountered on selected C32 marine engines is:
130-9725 / 1309725
with the associated Cat Reman reference:
10R-8236 / 10R8236
This is a separate C32 turbocharger configuration and should not automatically be substituted for 245-9734.
Caterpillar 287-7210 / 10R-3092
The 287-7210 / 2877210 is another basic turbocharger used on selected Caterpillar C30 and C32 marine engines.
Its corresponding Reman reference is:
10R-3092 / 10R3092
Again, this is a separate turbocharger configuration.
The presence of several turbocharger families within the C32 range is exactly why the engine serial number is important when ordering.
Signs of a Worn C32 Turbocharger
A deteriorating turbocharger can affect engine performance in several ways.
Possible symptoms include:
- Reduced engine power
- Low boost pressure
- Black exhaust smoke
- Slow acceleration
- Increased exhaust temperature
- Abnormal turbocharger noise
- Oil around the compressor or turbine side
- Excessive turbocharger shaft movement
- Damaged compressor blades
- Poor performance under load
However, these symptoms do not automatically mean the turbocharger itself has failed.
Low Boost Does Not Always Mean Turbocharger Failure
Before replacing a 245-9734 or 10R-1965, the complete air and exhaust system should be inspected.
Low boost can also result from:
- Restricted air filters
- Intake-system restrictions
- Charge-air leaks
- Damaged hoses
- Aftercooler leakage
- Exhaust leakage before the turbine
- Exhaust restrictions
- Fuel-system problems
- Injector faults
- Sensor problems
- Incorrect valve adjustment
Replacing the turbocharger will not solve a boost problem caused elsewhere in the engine.
Black Smoke and Turbocharger Performance
Black smoke from a Caterpillar C32 can occur when the engine receives insufficient combustion air relative to the amount of fuel being injected.
A worn or damaged turbocharger can contribute to this condition if it cannot provide the expected airflow.
However, black smoke can also be caused by intake restrictions, charge-air leakage, injector problems, fuel-system faults or excessive engine load.
A complete diagnosis should therefore be carried out before condemning the turbocharger.
Common Causes of Turbocharger Failure
Turbochargers operate at extremely high rotational speeds and temperatures.
Common causes of premature failure can include:
- Contaminated lubricating oil
- Insufficient oil supply
- Restricted turbo oil feed
- Restricted oil drain
- Foreign-object damage
- Intake-system contamination
- Dirty air filters
- Excessive exhaust temperature
- Injector problems
- Abnormal combustion
- Excessive engine blow-by
- Incorrect maintenance
Identifying the original cause of failure is particularly important before installing a replacement turbocharger.
New, Remanufactured & Replacement Options
Depending on availability, Alfa Marine Spare Parts can assist with different replacement options for Caterpillar marine turbochargers.
New 245-9734
A new 245-9734 / 2459734 turbocharger for the applicable engine configuration.
Cat Reman 10R-1965
The 10R-1965 / 10R1965 is the Cat Reman alternative associated with the 245-9734 turbocharger.
Replacement / Aftermarket
Replacement turbocharger options may also be available depending on the engine configuration and customer requirements.
For aftermarket supply, the replacement unit should be matched against the original turbocharger P/N and complete engine information.
Identification Before Ordering
For accurate identification, provide:
- Caterpillar engine model
- Complete engine serial number
- Engine arrangement number
- Existing turbocharger part number
- Existing Reman number, if applicable
- Clear turbocharger photos
- Identification-plate photos
- Quantity required
- Vessel/application
- Delivery location
For example:
Engine: Caterpillar C32 Marine
Turbocharger: 245-9734
Reman: 10R-1965
Engine Serial Number: [ESN]
Quantity: [Quantity]
Delivery: [Country / Port]
Browse Caterpillar C32 Parts
Alfa Marine Spare Parts supplies replacement components for Caterpillar C32 marine engines, including:
- Turbochargers
- Reman turbochargers
- Fuel injectors
- Fuel pumps
- Sea water pumps
- Freshwater pumps
- Cylinder heads
- Pistons
- Cylinder liners
- Bearings
- Gaskets and seals
- Sensors
- Electronic components
- Overhaul parts
Browse Caterpillar C32 Marine Engine Parts
For additional marine diesel engine components:
For Caterpillar and other marine engine brands:
Frequently Asked QuestionsWhat is Caterpillar 245-9734?
245-9734 is a Caterpillar basic turbocharger group used on selected C32 marine and marine auxiliary engines, as well as selected C18 and 3412D marine applications.
What is the Reman number for 245-9734?
The corresponding Cat Reman turbocharger is:
10R-1965 / 10R1965
Does 245-9734 fit Caterpillar C32 marine engines?
Yes, 245-9734 is associated with Caterpillar C32 marine and C32 marine auxiliary applications. Exact fitment should still be checked against the engine serial number and arrangement.
Is 10R-1965 a C32 turbocharger?
Yes. 10R-1965 is a Cat Reman turbocharger associated with selected C32 marine and marine auxiliary applications.
Is 287-7210 the same as 245-9734?
No. Both are associated with selected C32 applications, but they represent different turbocharger configurations.
The Reman associated with 287-7210 is 10R-3092, while the Reman associated with 245-9734 is 10R-1965.
Is 130-9725 the same as 245-9734?
They are different Caterpillar turbocharger references. 130-9725 is associated with 10R-8236 Reman, while 245-9734 is associated with 10R-1965 Reman.
What information do I need to order a C32 turbocharger?
Provide the complete C32 engine serial number, arrangement number, existing turbocharger P/N and clear photos.
Request Caterpillar 245-9734 / 10R-1965
Looking for a Caterpillar 245-9734 C32 marine turbocharger or 10R-1965 Cat Reman turbocharger?
Alfa Marine Spare Parts supplies marine diesel engine components to shipowners, shipyards, repair companies, marine engineers and vessel operators worldwide.
Send us:
Engine model
Engine serial number
Arrangement number
Turbocharger part number
Photos of the existing turbo
Quantity required
Delivery country or port
📧 request@alfamarinespareparts.com
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