Caterpillar 3512C Diesel Engine Inspections, YT-807 Heat Exchanger Overhaul (This is a sole source requirement and posting this solicitation to SAM.gov is information purpose only)
DEPT OF DEFENSE.DEPT OF THE NAVY.NAVSUP.NAVSUP GLOBAL LOGISTICS SUPPORT.NAVSUP FLC YOKOSUKA.NAVSUP FLT LOG CTR YOKOSUKA · Response deadline: Fri, 30 Oct 2026
What the government is buying
The Navy is soliciting services for Caterpillar 3512C diesel engine inspections and overhaul of the YT-807 heat exchanger. This requirement is being processed as a sole-source acquisition, meaning the government has determined only one responsible source can satisfy the need. The SAM.gov posting serves information purposes only and is not intended to generate competitive proposals.
NAICS code 336611 covers Ship Building and Repairing, which aligns with marine propulsion and auxiliary machinery work. Diesel engine inspections and heat exchanger overhauls are standard preventive and corrective maintenance activities for vessel power systems. The Caterpillar 3512C is a widely used industrial marine engine, and heat exchangers are critical components for engine cooling—requiring periodic overhaul to maintain operational reliability.
Key facts
| Attribute | Value |
|---|---|
| Agency | Department of the Navy, NAVSUP Fleet Logistics Center Yokosuka |
| Notice type | Sole-source solicitation (informational posting) |
| Solicitation number | N6264927QB003 |
| NAICS | 336611 – Ship Building and Repairing |
| Set-aside | None (sole source) |
| Response deadline | October 30, 2026, 3:00 PM JST (+09:00) |
| Place of performance | Yokosuka Naval Base, Japan |
Who can bid
This is not a competitive opportunity. As a sole-source requirement, the government has already identified a specific contractor and is not seeking additional bids. The SAM.gov posting fulfills statutory transparency requirements under federal acquisition regulations.
Small businesses interested in future ship repair and marine machinery contracts at Yokosuka Naval Base should monitor SAM.gov for competitive solicitations under NAICS 336611. NAVSUP Fleet Logistics Center Yokosuka regularly awards maintenance and repair contracts for naval vessels forward-deployed in the Indo-Pacific region.
Firms seeking to compete for similar work should:
- Maintain active SAM.gov registration with valid CAGE code
- Obtain Small Business Administration size standard confirmation for NAICS 336611 (1,250 employees, see the solicitation for specific thresholds)
- Consider small business set-aside opportunities when competitive solicitations are released
How to put together a competitive bid
For future competitive opportunities in this category:
Technical approach: Demonstrate experience with marine diesel engine maintenance, specifically Caterpillar systems or comparable medium-speed diesel platforms. Highlight certifications from engine manufacturers or factory-trained technicians on staff.
Past performance: Document prior ship repair contracts for U.S. government or commercial maritime customers, particularly in the Pacific theater. NAVSUP FLC Yokosuka values demonstrated ability to perform work aboard naval vessels and meet stringent quality assurance requirements.
Facility and logistics: Establish or partner with facilities proximate to Yokosuka Naval Base. The 7th Fleet operational tempo demands rapid response and minimal transit time. See the solicitation for specific facility security clearance requirements.
Subcontracting strategy: If pursuing set-aside competitions, identify qualified subcontractors for specialized heat exchanger services or OEM parts procurement. Marine heat exchanger overhaul often requires proprietary tube bundles or plate assemblies.
Next steps
- Review the full informational posting at SAM.gov using solicitation number N6264927QB003
- Note the response deadline of October 30, 2026, 3:00 PM Japan Standard Time
- Search SAM.gov for competitive opportunities under NAICS 336611 with NAVSUP FLC Yokosuka as the contracting activity
- Monitor for small business set-aside and HUBZone, SDVOSB, or WOSB competitions in marine repair services at this location
- See the solicitation for complete scope details, as the SAM.gov posting is informational only
View the official notice on SAM.gov →