0522_A__Steering_Gear_Scheduled_Maintenance_10_Year_Rev_I.doc

USNS WALLY SCHIRRA

(T-AKE 8)

500-Machinery, Auxiliary Systems

N32205-19-R-6005

24 SEPTEMBER 2018

ITEM NO: 0522

Category “A” MSC Norfolk/N756/SAK

STEERING GEAR SCHEDULED MAINTENANCE 10 YEAR REVISION I

1.0 ABSTRACT:

1.1 This work items describes the requirements to provide one Rolls-Royce Original Equipment Manufacturers (OEM) Representative to perform the Rotary Vane Steering Gear 7-10-year maintenance which requires replacing with new the upper and lower seals.

2.0 REFERENCES:

2.1 MSC T/M T9561-BR-MMC-010, STEERING GEAR, ROTARY VANE, MODEL RV 2150-3

3.0 ITEM LOCATION/DESCRIPTION:

3.1 Location/Quantity:

3.1.1 Location: Steering Gear Room 3-85-0

3.1.2 Quantity: One (1) Steering Gear Unit

3.2 Item Description/Manufacturer’s Data: Rolls-Royce Marine Rotary Vane Model RV-2150-3

3.2.1 Bill of Materials: (Contractor Supplied):

3.2.2 Contractor Provided Special Tools

4.0 GOVERNMENT FURNISHED EQUIPMENT/MATERIAL/SERVICES:

4.1 Government Furnished Equipment: None.

4.2 Government Furnished Material (GFM):

4.3 Government Furnished Services: None.

5.0

NOTES:

5.1 The Contractor and all subcontractors, regardless of tier, must consult the General Technical Requirements (GTR) to determine applicability to this work item. In performance of this work item, the contractor and all subcontractors regardless of tier must comply with the requirements of all applicable GTRs.

5.2 The Contractor and all subcontractors regardless of tier are advised to review the other work items under this contract to determine their effect on the work required under this work item.

5.3 THIS SHIP CONTAINS HIGH VOLTAGE (HV) ELECTRICAL SYSTEMS. OBEY ALL POSTED AND VERBAL INSTRUCTIONS REGARDING SAFETY AND EXCLUSION FROM HIGH VOLTAGE AREAS. AT NO TIME APPROACH, WORK ON, OR ENTER A HIGH VOLTAGE AREA WITHOUT PROPER AUTHORIZATION.

5.4 THE T-AKE CLASS ELECTRICAL COLOR CODING DOES NOT FOLLOW CONSISTENT COLOR SCHEME. THE SHIP IS KNOWN TO HAVE CURRENT CARRYING CONDUCTORS COLORED GREEN, BLUE, BLACK, AND WHITE. ASSUME ALL ELECTRICAL CABLES ARE ENERGIZED UNTIL TESTED AND PROVEN OTHERWISE. TEST ALL ELECTICAL CABLES TO ENSURE THEY ARE DE-ENERGIZED PRIOR TO WORKING ON THE ITEM.

6.0 QUALITY ASSURANCE REQUIREMENTS: None Additional

7.0 STATEMENT OF WORK REQUIRED:

7.1 Provide Rolls-Royce Original Equipment Manufacturer (OEM) field service technicians certified to perform maintenance and repair on the Model RV-2150-3 Rotary Vane Steering Gear outfitted on the T-AKE Class Vessels.

7.2 Rolls-Royce field service technicians are to assist in the steering gear maintenance and provide technical oversight throughout the entire maintenance evolution. Rolls-Royce field service technician is required to be present at all times when work is being accomplished on the steering gear unit.

7.3 Prior to disassembly an operational test will be conducted in the presence of the Rolls-Royce OEM Technical Representative and the shipyard to document the as delivered condition of the steering unit and alignment of the Steering unit and synchro-servo repeater and feedback system, include in report Ref 2.1 Sect 3.1 Maintenance Reporting.

7.4 Tag-Out all required systems and equipment. Drain and dispose of any liquid in accordance with all federal, state, and local regulations. The shipyard will dispose of the oil under work item 023.

7.5 Remove all interference around the steering gear unit to allow unrestricted rigging access.

7.6 Remove all linkages to the rudder servo control and feedback system.

7.7 Secure the Rudder Stock at the underside of the vessel to ensure the rudder stock does not fall to the dock floor.

7.8 Disassemble the steering gear unit to include removal of the steering gear unit lid. Rigging pad-eyes are available in the overhead. Utilize reference 2.1 for disassembly.

7.9 Perform inspection and seal replacement in accordance with reference 2.1 and at the direction of the Rolls-Royce OEM Technical representative. ABS Surveyor and MSCREP will witness seal inspection and replacement.

7.10 Maintain cleanliness of the hydraulic system while the steering unit is open. The steering actuator and all associated piping will remain covered to prevent dirt, debris, and foreign material from contaminating the hydraulic system.

7.11 Temporarily disconnect the rotor form the rudder stock in accordance with reference 2.1 section 2 and remove from the housing.

7.12 Replace the thrust bearing, the upper and lower liners (Radial Bearings).

Note: All seals are supplied in correct lengths and must NOT be shortened. The correct way of inserting the gland seals is shown in Reference 2.1; Sect 4.1; Figure 2.

Note: Seals to be cut apart for inserting around the rudderstock and to be glued/bonded together utilize LOCTITE Superglue 495, See Reference 2.1; Sect 4.1; Figure 1.)

7.13 Grease/lubricate all new seals before assembly as shown in Ref 2.1.1 DWG 33637E.

7.14 Replace the internal seals, upper and lower gland seals, actuator seals, pressure valves, and cover seal.

7.15 Reconnect the rotor to the rudder stock as stated in reference 2.1 section 2.

7.16 ABS Surveyor and MSCREP along with the Rolls-Royce field service technician will inspect steering unit internals prior to final closeout.

7.17 Reassemble the steering gear unit lid and associated appendages in accordance with reference 2.1.

7.18 Reconnect all linkages to the rudder servo control and feedback system.

7.19 Fill the unit with new oil and vent. The vessel will provide the oil.

7.20 Provide the services of a certified SPERRY Marine Electronics Technical Representative to assist Rolls-Royce perform an operational test and groom of the synchro-servo system to verify that all rudder angle indicators located throughout the ship track with the mechanical indicator on the rudder unit.

7.21 Painting:

7.21.1 Clean, Prime, and Paint all disturbed surfaces to match surrounding surfaces

7.22 Perform Operational Test during Dock and Sea Trails. Rolls-Royce Field Service Representative will attend sea trials for underway testing of the rudder.

7.23 The Rolls-Royce OEM Technical Representative shall provide a detailed final service report detailing the as found condition, all work performed to include all parts replaced, calibration of the steering unit synchro-servo repeater and feedback system, and results of the dock and sea trial testing.

7.24 Manufacturer's Representative:

7.24.1 Rolls Royce Field Service Technician:

Rolls Royce Commercial Marine Inc.

1731 13th Ave SW

Seattle, WA 98134-1009 USA

Tel: 206.782.9190, Fax: 206.782.0176 7.24.2 SPERRY Electronics Filed Service Technician:

Bruce B. Begault U.S. Service Manager Northrop Grumman Systems Corporation Sperry Marine Tel: 757.312.8375 Email: bruce.begault@ngc.com

8.0 GENERAL REQUIREMENTS: None Additional

0522-4