Description
Product Introduction & Engineering Value
The MAN B&W 3157169-9 is a specialized BCU Module used in MAN B&W marine automation equipment. Available identification records associate it with the Backup Control Unit, MBD PCB 1142354-4, and ASD 0250-C assembly. One supplier specifically identifies the unit as an Alpha Lubricator Control Unit, making application verification important before ordering.
This is a legacy marine control component. The practical issue is not simply finding a board with the same part number. Secondary markings, PCB number, revision, and the vessel’s installed control architecture should all be checked before installation.
Technical Specifications
- Manufacturer: MAN B&W / MAN Diesel
- MBD Part Number: 3157169-9
- Module: BCU Module
- Functional Description: Backup Control Unit
- MBD PCB: 1142354-4
- PCB Assembly: ASD 0250-C
- MAN B&W Reference: 14.0250.0
- Secondary Part Number: 73757985-01
- System/Unit Identification: SNK NST6
- NABCO References: NK050022 and other unit-specific markings are reported in supplier records
- Document Revision: 1.2 is reported for the ASD 0250-C documentation
- Reported Weight: Approximately 2.75 kg
A particularly useful identification record lists 3157169-9 / 73757985-01 / NK040203 / K04Y5146 / 14.0250.0 / SNK NST6 / 1142354-4 / ASD 0250-C, with a reported weight of 2.750 kg.
Another listing identifies the assembly as MBD PCB 1142354-4, ASD 0250-C, with MAN B&W 14.0250.0, 73758006-01, NABCO K04Z5437, COI 5.2 A, and Doc. Rev. 1.2. This demonstrates that individual boards may carry additional identification markings.
Do not assign a supply voltage, current rating, I/O count, or communication protocol to 3157169-9 without the applicable MAN documentation. The available commercial records do not provide enough reliable evidence for those specifications.
3157169-9
3157169-9
Field Application & the “Trench” Experience
A vessel is preparing for an engine-control maintenance period. The existing BCU begins producing intermittent faults, and the maintenance team removes the board for inspection. The replacement search initially turns up several listings labeled simply 3157169-9.
That is not enough.
The technician checks the original board and finds 1142354-4, ASD 0250-C, and additional MAN/NABCO identification markings. The supplier’s photographs are then compared against those markings before the purchase is approved. This is the sensible approach for a legacy marine automation board.
Current records specifically connect the part with the Alpha Lubricator control system, while other listings describe it more generally as a marine engine BCU.
Specific application scenarios
- Alpha Lubricator control replacement — sourcing a matching BCU where the installed assembly uses the ASD 0250-C / 1142354-4 configuration.
- Marine engine automation cabinet maintenance — retaining a verified BCU as a contingency spare for legacy MAN B&W equipment.
- Shipyard overhaul work — identifying and validating a replacement board before recommissioning the vessel’s engine-control equipment.
Transparency SOP: QA & Testing
For New Surplus, New Open Box, or Refurbished stock, the inspection should follow a documented sequence.
1. Part identification
Verify 3157169-9 and photograph the complete nameplate.
2. Cross-reference verification
Record the PCB number 1142354-4, assembly designation ASD 0250-C, and any MAN/NABCO markings.
3. Physical inspection
Check connectors, PCB surfaces, solder joints, mounting hardware, corrosion, contamination, and signs of previous repair.
4. Electrical inspection
Perform only tests supported by the applicable technical documentation and suitable test equipment.
5. Functional test
Where a compatible test setup is available, test the BCU under representative operating conditions. A visual inspection is not a functional test.
6. Documentation
Keep photographs, revision information, test results, and the shipped unit’s identification together for traceability.
There is a meaningful condition difference in the current market: one supplier lists a New Open Box 3157169-9, while several others list the same part as Used. Procurement should therefore specify the required condition explicitly.
The Veteran’s Tech Trap Guide
⚠️ Trap #1 — Treating every 3157169-9 listing as identical
The part number is the starting point, not the entire identification. Secondary records include 1142354-4, ASD 0250-C, 14.0250.0, 73757985-01, and SNK NST6. Compare the complete markings on the installed unit.
⚠️ Trap #2 — Confusing the BCU part number with the PCB number
3157169-9 is associated with the BCU module, while 1142354-4 identifies the associated MBD PCB in supplier documentation. They should not be treated as interchangeable procurement numbers.
PRO TIP: Photograph the original BCU before removal. Get the label, PCB number, revision, connectors, and any NABCO markings in the same maintenance record.
⚠️ Trap #3 — Buying on description alone
A listing may call the unit a “Backup Control Unit,” “BCU Module,” or even use a generic control-unit description. Confirm the physical identification. One marketplace listing, for example, uses the description “Fuse Control Unit Module,” which is not sufficiently precise for engineering procurement.
Dynamic FAQ
What is MAN B&W 3157169-9?
It is a BCU Module (Backup Control Unit) for MAN B&W marine automation equipment. Available records associate it with MBD PCB 1142354-4 and ASD 0250-C.
Is 3157169-9 associated with an Alpha Lubricator?
Yes. A current marine-parts record specifically describes the 3157169-9 BCU as an Alpha Lubricator Control Unit. Application should still be confirmed against the vessel’s installed system.
What PCB is used with 3157169-9?
The associated PCB is identified as 1142354-4, with the assembly designation ASD 0250-C.
Is 3157169-9 available as New Surplus?
Current listings show different stock conditions, including New Open Box and Used. Therefore, the procurement request should specify the desired condition and require photographs of the actual unit.
What should I verify before ordering?
At minimum, compare 3157169-9, 1142354-4, ASD 0250-C, the MAN B&W reference, revision markings, and the physical connector arrangement against the installed BCU.
What warranty should apply?
The warranty is supplier-specific. For a marine control module, request the warranty period in writing and clarify whether it covers DOA, functional failure, and replacement/return testing. A statement that the board is “tested” should not replace a defined warranty.
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