0500_A_Humphreys Troubleshoot and repair the dual steering gear sys.doc

USNS HUMPHREYS

T-AO 188

1.0 ABSTRACT:

1.1. This item describes the requirement to provide specific expertise to troubleshoot and repair port and starboard steering gear system.

2.0 REFERENCES: None.

3.0 ITEM LOCATION/DESCRIPTION:

3.1. Location/Quantity: Various.

4.0 GOVERNMENT FURNISHED EQUIPMENT/MATERIAL/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.

6.0 QUALITY ASSURANCE REQUIREMENTS: None additional.

7.0 STATEMENT OF WORK REQUIRED:

7.1. Tag-Out all required systems and equipment. Drain and dispose of any liquid in accordance with all federal, state, and local regulations.

7.2. Provide the services of the Original Equipment Manufacturer (OEM) representative(s) identified in paragraph 7.5

7.3. This Statement of Work (SOW) requires maintenance and repair actions to be performed on a 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 shall be used to accomplish the requirements of this SOW 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.

7.4. Trouble shoot cause for sluggish rudder response and unacceptable error of the rudder angle.

7.4.1. During testing it was noted that steering was sluggish, slow on command reaction, and inaccurate when given a command from the helm.

7.4.2. Calibration points are +/- 20° and allowable error is +/- 1° with a properly aligned and functioning system.

7.4.3. Perform these corrective actions at a minimum:

a. Align zero helm setting in trick wheel boxes.

b. Reset mechanical stops to 35.5°.

c. Have hydraulic Rep inspect servo control valves located on pumps for wear and sheared or damaged pins.

d. Reset mid ships position mechanically as required.

e. Reset limit switches in both rotary power units.

f. Operate bridge controls, re-align as required.

7.4.4. An expert in hydraulic steering gear systems is required to center pumps so the system can be evaluated and recommendations given.

7.4.5. Operationally test.

7.5. Manufacturer's Representative:

7.5.1. Provide the services of authorized OEM representative(s) for Sperry Marine in support of the Steering Gear Control Systems. Suggested source:

Nav Systems Inc.

425 Network Station, Suite 10 Chesapeake, VA 23320

PH: (757) 675-5900

Email: dave.hall@nav-sys.com CAGE Code: 6SUK3 Dunns # 078416322

7.5.2. Obtain the services of a specialist in hydraulic steering systems. Known source:

Global Hydraulics Inc.

P.O. Box 144/ 629 Acorn Hill Rd Sunbury NC 27979

757 621-7152

7.6. Preparation of Drawings: None.

8.0 GENERAL REQUIREMENTS: None additional.

0500 - 3