A1 0201_A_REDUCTION GEAR LAYUP TRT CAR.docx

USNS Trenton, USNS Carson City

( TEPF 5, 7)

ABSTRACT

The purpose of this item is to perform annual inspections, long-term storage and anti-corrosion maintenance on the main reduction gears on-board USNS Trenton, USNS Carson City Location: EPF 5 (TRT), 7 (CAR) Port of Orange Texas 1006 Alabama St.

Orange, TX 77630

POP: 14APR – 25APR25

REFERENCES

1.1 NAVSEA Tech Manual S9241-DA-MMC-010, Marine Reduction Gear, Model ZF 60000 NR2H

ITEM LOCATION/DESCRIPTION

Locations Jet Drive Room 1 (5-70-1) Jet Drive Room 2 (5-70-2) Quantity (Per ship): Four (4) Reduction Gears

1.2 Item Description/Manufacturer’s Data

1.2.1 Model: ZF 60000

GOVERNMENT FURNISHED EQUIPMENT/MATERIAL/SERVICE: None

NOTES: None additional.

QUALITY ASSURANCE REQUIREMENTS: None additional.

STATEMENT OF WORK REQUIRED.

Provide the services on an OEM authorized field service representative to perform annual inspections, long-term storage and anti-corrosion maintenance on the main reduction gears.

The OEM field rep is to provide all tools, equipment, consumables and materials to accomplish this maintenance.

With the assistance of ship’s force, ensure that effected systems are locked out/tagged out prior to the start of any work.

Coordinate work with ship’s force. A representative from ship’s force must always be present while reduction gear covers are removed.

Under the guidance of a manufacturer’s representative, perform the following maintenance procedures of Reference 2.1 on equipment listed in section 3.0:

Maintenance Work No. 122: Confirm proper tension hardware to gearbox including input shaft/output shaft mounting bolts.

Maintenance Work No. 124: Clean and inspect oil filter unit.

Maintenance Work No. 132: Visually inspect clutch discs.

Maintenance Work No. 133: Visually inspect gears.

Under the guidance of a manufacturer’s representative, perform the following long-term storage and anti-corrosion procedures in accordance with reference 2.1 procedure K3 on equipment listed in section 3.0:

Drain transmission of oil and fill with corrosion protection oil at least until the bottom measuring mark of the oil gauge. Use corrosion protection oil C 642 or C 644 IAW MIL-L-21260 Operate engine in the “counter-engine-wise output shaft rotation” control valve switch position at increased motor idle speed (max. 50% of nominal operating speed) for approx. 5 to 10 minutes.

Shut down engine.

Plug all breathers and mark them as being plugged. Fill transmission completely with corrosion protection oil, being careful to note if any oil leaks past breather plugs. If leaks are present stop filling with oil, clean up any leakage, and re-plug the breathers.

Protect outer bare steel parts against corrosion using corrosion inhibiting grease.

Reports When inspection, service and testing reveal any deficiency a condition report is to be submitted to the MSCREP with recommended repairs and parts required. Submit one (1) typewritten copies and one (1) electronic copy in Portable Document Format (PDF).

Submit a report that includes “as released” condition of the reduction gears. Submit one (1) electronic copy in Portable Document Format (PDF).

All reports and checklists are to be completed and signed by the person who carried out the inspection and maintenance work and countersigned by the Company’s representative.

Painting: None additional.

Manufacturer’s Representative Provide the services of OEM authorized field service technical representative and labor to accomplish all work and testing on the reduction gears identified in paragraph 3.0 ensuring compliance with the manufacturer’s standards and performance specifications.

This work item requires maintenance and repair actions to be performed on an MSC ship critical safety item. Only original equipment manufacturer (OEM) authorized technical field service providers or MSC qualified non-OEM technical field service providers and OEM authorized or MSC qualified non-OEM parts are to be used to accomplish the requirements of this work item for this ship critical safety item including oversight and guidance on all aspects of equipment as-found condition inspection, removal, disassembly, reassembly, repairs, modifications, reinstallation, and testing as applicable.

Possible source:

Richard Bowles Senior Field Sales Representative Aftermarket Service ZF Marine Propulsion Systems Miramar, LLC 15351 SW 29th Street, Suite 300 Miramar, FL 33027 - USA Office: +1 954-441-4064 Mobile: +1 443-250-6276 richard.bowles@zf.com

Preparation of Drawings: None additional.

GENERAL REQUIREMENTS: None additional.

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