Caterpillar C32 Marine Turbochargers – Part Numbers & Reman Options
The Caterpillar C32 marine engine is available in numerous ratings and configurations, which means there is no single turbocharger part number that can automatically be used on every C32.
Depending on the engine serial number, arrangement and application, different turbocharger assemblies can be installed. This is especially important when sourcing a new or Reman turbocharger because two engines carrying the same C32 designation can have different air-system configurations.
Among the important Caterpillar C32 marine turbocharger combinations are:
| Caterpillar Turbo P/NCat Reman P/NApplication | ||
| 130-9725 | 10R-8236 | C30 / C32 Marine |
| 245-9734 | 10R-1965 | C32 Marine / Marine Auxiliary |
| 287-7210 | 10R-3092 | C30 / C32 Marine, C32 Marine Auxiliary |
For engine information and additional components, visit:
Caterpillar C32 Marine Engine Parts
Caterpillar 130-9725 C32 Marine Turbocharger
The Caterpillar 130-9725 is a turbocharger group used on selected Caterpillar C30 and C32 marine engines.
Caterpillar currently identifies 130-9725 as discontinued, making the Reman reference particularly important when maintaining an older C32 installation.
Part Number
130-9725 / 1309725
Caterpillar Reman
10R-8236 / 10R8236
The important cross-reference is therefore:
130-9725 → 10R-8236 Cat Reman Turbocharger
The 10R-8236 Reman turbocharger is associated with Caterpillar C15, C30 and C32 marine engines.
When replacing an older 130-9725, the complete C32 engine serial number should still be checked before ordering.
Caterpillar 245-9734 C32 Marine Turbocharger
The 245-9734 is another important basic turbocharger group used on Caterpillar C32 engines.
Its applications include selected:
- Caterpillar C32 marine engines
- Caterpillar C32 marine auxiliary engines
- Caterpillar C32 generator sets
- Caterpillar C18 marine engines
- Caterpillar 3412D marine engines
Part Number
245-9734 / 2459734
Caterpillar Reman
10R-1965 / 10R1965
The corresponding combination is:
245-9734 → 10R-1965 Cat Reman Turbocharger
The 10R-1965 is therefore an important number for shipowners and repair companies searching for a Reman alternative to an existing 245-9734.
Caterpillar 287-7210 C32 Marine Turbocharger
The 287-7210 is a Caterpillar basic turbocharger associated with selected C30 and C32 applications.
Its applications include:
- Caterpillar C30 marine engine
- Caterpillar C32 marine engine
- Caterpillar C32 marine auxiliary
- Caterpillar C32 generator set
Part Number
287-7210 / 2877210
Caterpillar Reman
10R-3092 / 10R3092
The important replacement relationship is:
287-7210 → 10R-3092 Reman Turbocharger
This Reman number is particularly useful because an engineer searching only for 287-7210 may otherwise overlook the Reman replacement option.
Three Important C32 Turbocharger & Reman Combinations
For quick reference:
Caterpillar 130-9725
New/Original: 130-9725 / 1309725
Reman: 10R-8236 / 10R8236
Application: C30 / C32 Marine
Caterpillar 245-9734
New/Original: 245-9734 / 2459734
Reman: 10R-1965 / 10R1965
Application: C32 Marine / C32 Marine Auxiliary
Caterpillar 287-7210
New/Original: 287-7210 / 2877210
Reman: 10R-3092 / 10R3092
Application: C30 / C32 Marine and C32 Marine Auxiliary
These turbochargers should not be considered mutually interchangeable simply because they are all used within the C32 engine family.
Why Does the Caterpillar C32 Use Different Turbochargers?
The C32 engine family covers different power ratings, applications and engine arrangements.
A turbocharger must match the airflow requirements of the specific engine configuration.
Important differences can include:
- Engine rating
- Rated engine speed
- Fuel-system configuration
- Air-system configuration
- Exhaust arrangement
- Marine propulsion versus auxiliary application
- Engine arrangement number
- Engine production generation
Installing an incorrect turbocharger can affect boost pressure, exhaust temperature, combustion and overall engine performance.
This is why Alfa Marine Spare Parts recommends using the engine serial number and existing turbocharger number together when identifying a replacement.
How the C32 Turbocharger Works
The turbocharger uses energy from the engine's exhaust gases to increase the amount of air entering the cylinders.
Exhaust gas leaving the cylinders drives the turbine wheel. The turbine is connected through a shaft to the compressor wheel on the intake side.
As compressor speed increases, additional air is compressed and delivered toward the engine.
The increased air density allows the C32 to burn the required quantity of fuel efficiently and develop its rated output.
Because the turbocharger operates at high rotational speed and temperature, lubrication, clean intake air and correct exhaust conditions are critical to service life.
Common Caterpillar C32 Turbocharger Problems
A C32 turbocharger can deteriorate gradually rather than failing suddenly.
Engine operators may notice:
- Reduced engine power
- Low boost pressure
- Black exhaust smoke
- Increased exhaust temperature
- Slow acceleration
- Abnormal turbocharger noise
- Oil around the compressor side
- Excessive shaft movement
- Damaged compressor blades
- High engine temperature under load
However, these symptoms do not automatically prove that the turbocharger itself is defective.
The complete engine system should be considered before replacing it.
Low Boost Does Not Always Mean the C32 Turbo Is Bad
Low boost is one of the most common reasons an engineer begins investigating the turbocharger.
But the turbo is only one part of the complete air system.
Low boost can also result from:
- Restricted air filters
- Intake restrictions
- Charge-air leaks
- Damaged hoses
- Aftercooler leakage
- Exhaust leakage before the turbine
- Exhaust restriction
- Fuel-delivery problems
- Injector faults
- Sensor problems
- Incorrect valve adjustment
A replacement turbocharger will not correct a boost problem caused elsewhere in the engine.
Black Smoke and the C32 Turbocharger
Black smoke generally indicates that the engine is receiving more fuel than can be efficiently burned with the available combustion air.
A damaged or inefficient turbocharger can contribute to this condition because the engine may not receive sufficient boost.
However, black smoke can also result from restricted intake air, charge-air leakage, injector problems or excessive engine load.
A useful diagnostic approach is therefore to determine why the engine is not receiving the expected quantity of combustion air before assuming that the turbocharger has failed.
Why C32 Turbochargers Fail
Turbocharger failure can result from problems outside the turbo itself.
Common causes include:
- Insufficient lubrication
- Contaminated engine oil
- Restricted turbocharger oil feed
- Restricted oil drain
- Incorrect lubricating oil
- Foreign-object damage
- Intake-system contamination
- Exhaust-system damage
- Excessive exhaust temperature
- Injector problems
- Abnormal combustion
- Excessive engine blow-by
Finding the root cause is particularly important when installing a new or Reman turbocharger.
If the original failure was caused by restricted lubrication, for example, installing another turbo without correcting the oil-supply problem can damage the replacement unit.
New vs Caterpillar Reman C32 Turbocharger
When a C32 turbocharger requires replacement, a Caterpillar Reman unit can provide another option alongside a new turbocharger.
For these three verified turbo families:
130-9725 → 10R-8236
245-9734 → 10R-1965
287-7210 → 10R-3092
The Reman number should be treated as part of the specific turbocharger family rather than assuming that one C32 Reman turbo fits every C32 engine.
Information Required When Ordering a C32 Turbocharger
For accurate identification, provide:
Engine: Caterpillar C32 Marine
Complete Engine Serial Number: Required
Arrangement Number: If available
Existing Turbo P/N: Required where readable
Reman P/N: If currently installed
Photos: Turbocharger and identification plate
Quantity: Required quantity
Application: Propulsion / Auxiliary / Generator
For example:
Engine: Caterpillar C32 Marine
Existing Turbo: 245-9734
Reman Reference: 10R-1965
Engine Serial Number: [ESN]
Quantity: 2
Providing this information greatly reduces the risk of selecting the wrong turbocharger.
Browse Caterpillar C32 Marine Engine Parts
Alfa Marine Spare Parts supplies turbochargers and other replacement components for Caterpillar C32 marine engines.
Parts requirements can include:
- Turbochargers
- Reman turbochargers
- Turbocharger components
- Fuel injectors
- Fuel pumps
- Sea water pumps
- Freshwater pumps
- Cylinder heads
- Pistons
- Cylinder liners
- Bearings
- Gaskets
- Sensors
- Electronic components
- Overhaul components
Browse Caterpillar C32 Marine Engine Parts
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Browse Marine Spare Parts
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Frequently Asked Questions
What turbocharger does a Caterpillar C32 use?
There is no single universal C32 turbocharger. Verified C32 marine references include 130-9725, 245-9734 and 287-7210, depending on the engine configuration.
What is the Reman number for Caterpillar 130-9725?
The Caterpillar Reman alternative is:
10R-8236 / 10R8236
What is the Reman number for Caterpillar 245-9734?
The Caterpillar Reman alternative is:
10R-1965 / 10R1965
What is the Reman number for Caterpillar 287-7210?
The Caterpillar Reman alternative is:
10R-3092 / 10R3092
Is 130-9725 still available as a current Caterpillar turbo?
The 130-9725 is an older/discontinued Caterpillar turbocharger group. 10R-8236 is an important Cat Reman alternative for this turbo family.
Can 10R-1965 replace every C32 turbocharger?
No. 10R-1965 is associated with specific C32 turbocharger applications, including the 245-9734 family. It should not be treated as a universal C32 Reman turbocharger.
Are 130-9725, 245-9734 and 287-7210 interchangeable?
No. Although all three are associated with C32 marine applications, the exact turbocharger must be selected according to the engine serial number and arrangement.
Request a Caterpillar C32 Turbocharger
Looking for a Caterpillar C32 turbocharger or Cat Reman turbocharger?
Alfa Marine Spare Parts supports shipowners, shipyards, marine engineers, repair companies and vessel operators with marine diesel engine spare parts.
Send us:
C32 engine serial number
Engine arrangement number
Existing turbocharger part number
Existing Reman number, if applicable
Clear turbocharger photographs
Quantity required
Delivery country or port
📧 request@alfamarinespareparts.com