FORWARD SPEC_10REV0.pdf

(October 13, 2009 / Rev 0)

USCGC FORWARD (WMEC-911)

270 FOOT B CLASS MEDIUM ENDURANCE CUTTER

SPECIFICATION FOR DRYDOCK REPAIRS

Developed By:

D. Abdella

Commander (v) Maintenance and Logistics Command, Atlantic 300 E. Main Street, Suite (600) Norfolk, VA 23510-9102

USCGC FORWARD (WMEC-911) DRYDOCK AVAILABILITY 2010

Page i (Rev 0)

TABLE OF CONTENTS

Work Item Title Page

List of Sketches iii

Revisions Record iv

List of Applicable References v

List of Government-furnished Property x

List of Critical Inspection Items xii

Specification Feedback xiii

Principal Characteristics xiv

General Requirements 1

1 Perform Ultrasonic Thickness Measurements - Underwater Hull Plating 8

2 Remove, Inspect, and Reinstall Propeller Shafts 10

3 Renew Shaft Covering 13

4 Straighten Shaft 15

5 Renew Water-Lubricated Shaft Bearings 17

6 Renew Propeller Shaft Sleeve(s) 20

7 Overhaul Stern Tube Seal Assemblies 22

8 Remove and Reinstall Controllable Pitch Propeller Hubs 25

9 Service Both Onboard Controllable Pitch Propeller Systems 28

10 Renew Speed Doppler 37

11 Renew Depth Indicating Transducers 39

12 Overhaul and Renew MSW/ASW Valves 41

13 Inspect and Test Air Receivers 45

14 Inspect and Test Air System Valves 47

Page ii (Rev 0)

15 Overhaul Steering Systems 49

16 Service Rudder Assemblies 53

17 Service Fin Stabilizer Systems 63

18 Preserve, Repair and Disinfect Potable Water Tanks – 100% 69

19 Preserve and Disinfect Feed Water Tank – 100% 72

20 Preserve Ballast Tanks – 100% 74

21 Preserve Underwater Body – 100% 77

22 Preserve Superstructure Bulkhead Surfaces 79

23 Preserve Stern Tube(s) 81

24 Routine Drydocking 83

25 Provide Temporary Logistics 87

26 Provide Support for Performance of Sea Trials 90

27 Preserve Bilge Pockets 93

28 Preserve Designated Tank Top Surfaces 96

29 Preserve Designated Bilge and Tank Top Surfaces 99

30 Preserve Compartment Bilge Surfaces – 100% 102

31 Overhaul and Test Fuel Manifold Assemblies 105

32 Repair Deck In Bos’n Workshop 108

33 Repair Hull Plating, Deck Plating and LO Fill Box 110

34 Repair Deck in Repair Locker #2 113

35 Repair Hangar 115

36 Renew Bulkhead Insulation 117

Page iii (Rev 0)

List of Sketches

Work Item Sketch Number Page

This section is not applicable to this package.

Page iv (Rev 0)

Revisions Record

This page is used to record specification revisions, which may have occurred subsequent to a Revision 0 (Rev-0) package. Information listed is intended to provide contractors and field unit personnel a means to ensure all the current specification revision pages are present when reviewing or utilizing this specification package.

DATE REV# WORK

ITEM#

CHANGES MADE

NOTE: All work item and paragraph numbers listed above for a given revision correspond to same numbers in the previous revision. This revised specification is self-contained with all of the above listed changes incorporated.

Page v (Rev 0)

List of Applicable References

The below-listed documents form a part of this specification to the extent specified herein.

Approval/publication dates or revision dates/numbers are also identified, to ensure that same document versions are used at time of specification writing and during contract execution. Electronic copies of the latest Editions of MLCA Standard Specifications are available on the Internet and may be accessed at the following Internet Uniform Resource Locator (URL) address:

http://www.uscg.mil/mlclant/vdiv/standard_specifications.asp. Guidance for obtaining copies of all other documents referenced herein is provided in the solicitation.

Order of precedence. In the event of conflicts between text of this specification and the applicable references specified herein, order of precedence shall be in accordance with MLCA Standard Specification 0000_STD, paragraph 3.2 (Order of precedence), unless otherwise specified by the Contracting Officer (KO). The Contractor shall immediately notify the KO in writing of any perceived conflicts contained herein. Nothing in these documents, however, supersedes applicable laws and regulations, unless a specific exemption has been obtained.

FEDERAL AND MILITARY SPECIFICATIONS AND STANDARDS

MIL-A-18001, May 2008, Anodes, Sacrificial Zinc Alloy (Commercially Accepted - ASTM B418)

MIL-G-21164, Oct 1991, Grease, Molybdenum Disulfide, For Low and High Temperatures

MIL-G-24716, Apr 1993, Gaskets, Metallic-Flexible Graphite, Spiral Wound

MIL-PRF-16173, Sept 2006, Corrosion Preventive Compound, Solvent Cutback, Cold Application

MIL-H-17672D, Mar 1987, Hydraulic Fluid, Petroleum, Inhibited

MIL-STD-1687, Sep 1994, Thermal Spray Process for Naval Ship Machinery Application

MIL-STD-2191, Nov 1992, Repair Welding, Weld Cladding, Straightening, and Cold Rolling of Main Propulsion Shafting

MIL-STD-2199, Oct 1993, Glass Reinforced Plastic Coverings for Propeller Shafting

Commercial Item Description (CID) A-A-59313, Nov 2003, Thread Compound; Antisieze, Zinc Dust- Petrolatum

OTHER GOVERNMENT DOCUMENTS, DRAWINGS, AND PUBLICATIONS

DOCUMENTS

Coast Guard Maintenance and Logistics Command Atlantic (MLCA), Standard Specification 0000_STD, 2006 Edition, General Requirements

Coast Guard Maintenance and Logistics Command Atlantic (MLCA), Standard Specification 0740_STD, 2004 Edition, Welding and Allied Processes http://www.uscg.mil/mlclant/vdiv/standard_specifications.asp�

Page vi (Rev 0)

Coast Guard Maintenance and Logistics Command Atlantic (MLCA), Standard Specification 1001_STD, 2004 Edition, Temporary Hull Accesses

Coast Guard Maintenance and Logistics Command Atlantic (MLCA), Standard Specification 5000_STD, 2004 Edition, Auxiliary Machinery Systems

Coast Guard Maintenance and Logistics Command Atlantic (MLCA), Standard Specification 8634_STD, 2004 Edition, Drydocking

Coast Guard Maintenance and Logistics Command Atlantic (MLCA), Standard Specification 8635_STD, 2004 Edition, Provide Temporary Logistics

DRAWINGS

Coast Guard Drawing 901 WMEC 562-004, Rev D, A & B Class Rudder Assembly

Coast Guard Drawing 901 WMEC 562-005, Rev F, A & B Class Rudder Stock And Steering Gear A & D

Coast Guard Drawing 901 WMEC 565-031, Rev C, Fin Shaft Assembly, w/ Sleeve Fitted NSN 3040-01- 104-5121, (for both A & B Classes)

Coast Guard Drawing 905 WMEC 111-001, Rev D, Shell Expansion Fwd 101

Coast Guard Drawing 905 WMEC 111-002, Rev E, Shell Expansion Aft Fr 182

Coast Guard Drawing 905 WMEC 111-003, Rev E, Shell Expansion Fr 101 - 182

Coast Guard Drawing 905 WMEC 113-001, Rev C, Tank Top Plating & Framing FWD FR 101

Coast Guard Drawing 905 WMEC 117-003, Rev C, Framework & Breast Hook FWD FR 28

Coast Guard Drawing 905 WMEC 117-004, Rev A, Web FR/STAN FR 33/40/54

Coast Guard Drawing 905 WMEC 131-001, Rev C, Main Deck Plating and Framing, FWD 101

Coast Guard Drawing 905 WMEC 136-003, Rev C, 01 Level Plate and Frame 101-182

Coast Guard Drawing 905 WMEC 141-001, Rev D, 1st Platform PL & FR FWD 103

Coast Guard Drawing 905 WMEC 141-002, Rev C, 1st Platform PL & FR, AFT 182

Coast Guard Drawing 905 WMEC 184-010, Rev E, Transducer Foundations & Shell Mods

Coast Guard Drawing 905 WMEC 185-009, Rev C, JP-5 Pump Room Foundations

Coast Guard Drawing 905 WMEC 201-001, Rev F, Engine Room Arrangement

Coast Guard Drawing 905 WMEC 243-001, Rev B, Shafting Arrangement

Coast Guard Drawing 905 WMEC 243-002, Rev E, Stern Tubes Strut Brg and Seal Arr and Det

Coast Guard Drawing 905 WMEC 243-003, Rev-, Shaft Removal Arrangement

Page vii (Rev 0)

Coast Guard Drawing 905 WMEC 243-006, Rev B, Shaft Seal Assembly and Details

Coast Guard Drawing 905 WMEC 243-008, Rev B, Shaft & Rudder Removal Pad eye A & D

Coast Guard Drawing 905 WMEC 243-012, Rev A, Controllable Pitch Propeller Shafting Details

Coast Guard Drawing 905 WMEC 245-001, Rev H, CPCH Propeller Hydraulic System Diagram

Coast Guard Drawing 905 WMEC 245-003, Rev C, Propeller Hub Assembly

Coast Guard Drawing 905 WMEC 245-004, Rev A, Blade And Palm

Coast Guard Drawing 905 WMEC 245-007, Rev B, Special Tools

Coast Guard Drawing 905 WMEC 245-008, Rev B, Actuating Unit

Coast Guard Drawing 905 WMEC 245-009, Rev C, CPCH Prop Hyd System Power Plant A & D

Coast Guard Drawing 905 WMEC 264-001, Rev E, Lube Oil Fill, Xfer and Purification System A&D

Coast Guard Drawing 905 WMEC 321-004, Rev D, Wireways Main Deck

Coast Guard Drawing 905 WMEC 475-002, Rev D, Degauss System General Locations – IWD

Coast Guard Drawing 905 WMEC 475-005, Rev E, Degaussing SYS DET & Loop Location (Detail D)

Coast Guard Drawing 905 WMEC 501-002, Rev C, Aux Machinery Space No. 2 Arrangement

Coast Guard Drawing 905 WMEC 505-007, Rev J, Piping System Cleaning & Flushing Procedures

Coast Guard Drawing 905 WMEC 514-012, Rev A, HVAC Main Deck FR 117-165 A&D

Coast Guard Drawing 905 WMEC 541-001, Rev G, F/O Fill & Transfer System Diagram

Coast Guard Drawing 905 WMEC 541-002, Rev E, Fuel Oil Fill & Transfer IMS - A & D

Coast Guard Drawing 905 WMEC 551-001, Rev G, Compressed Air Sys Diag

Coast Guard Drawing 905 WMEC 551-007, Rev A, Air Receivers Instal & Arr

Coast Guard Drawing 905 WMEC 561-001, Rev A, Dual Pump Unit, 125-Gal

Coast Guard Drawing 905 WMEC 561-002, Rev B, Steering Gear Hydraulic Schematic

Coast Guard Drawing 905 WMEC 561-003, Rev B, Steering Hydraulics - A&D

Coast Guard Drawing 905 WMEC 565-007, Rev H, Fin Stabilizer Machinery Assembly

Coast Guard Drawing 905 WMEC 588-010, Rev C, Hangar A&D

Coast Guard Drawing 905 WMEC 633-001, Rev B, Cathodic Protection A&D

Page viii (Rev 0)

Coast Guard Drawing 905 WMEC 635-001, Rev F, Hull Thermal and Acoustic Insulation A&D

Coast Guard Drawing 905 WMEC 665-004, Rev E, Anchor Windlass Room & Bosn’s Workshop - A&D

Coast Guard Drawing 905 WMEC 801-003, Rev F, General Arrangement – 02/Pilot House and Above

Coast Guard Drawing 905 WMEC 801-004, Rev C, General Arrangement – 01 Level

Coast Guard Drawing 905 WMEC 801-006, Rev D, General Arrangement – 1st Platform

Coast Guard Drawing 905 WMEC 801-007, Rev E, General Arrangement – Hold

Coast Guard Drawing 905 WMEC 801-009, Rev F, Outboard Profile

Coast Guard Drawing 905 WMEC 801-010, Rev B, Inboard Profile

Coast Guard Drawing 905 WMEC 801-038, Rev F, Docking Plan (USCGC FORWARD)

Coast Guard Drawing FL 6713-201, Rev B, CRP-V850 Transducer (B-14) Adapter Assembly

NAVSEA Drawing 803-2145807, Rev C, Propulsion Shafting and Components

NAVSEA Drawing 803-921865, Rev R, Cathodic Protection Hull Zinc Anodes

PUBLICATIONS

Coast Guard Commandant Instruction (COMDTINST) M10360.3 (series), Jun 2006, Coatings and Color Manual

Coast Guard Technical Publication (TP) 2816, Mar 1986, SWBS 243, Section B, Technical Manual for Type MA Mechanical Stern Tube Seal

Coast Guard Technical Publication (TP) 2817, Apr 2008, Technical Manual for the Controllable-Pitch Propeller

Coast Guard Technical Publication (TP) 2835, Dec 1992, Manufacturer’s Instruction Book - SWBS Group(s) 561-562, 270’ WMEC “B” Class Cutters

Coast Guard Technical Publication (TP) 2837, Feb 2007, Fin Machinery and Hydraulics Subsystems WMEC 270 Class Ship

Coast Guard Technical Publication (TP) 3351, Mar 1998, Preventive Maintenance System Manual, 270’ WMEC Class Cutters, Sections A and B, Maintenance Procedure Card (MPC) A-C-1063

Raytheon V850 Color Echosounder, 2nd Edition, Mar 1993, Operation Manual

INDUSTRY STANDARDS

American National Standards Institute/NSF International (ANSI/NSF) 61, 2005, Drinking Water System Components - Health Effects

American Society of Mechanical Engineers (ASME) PTC 25, 2008, Pressure Relief Devices

Page ix (Rev 0)

American Society of Mechanical Engineers (ASME) B16.34, 2004, Valves-Flanged, Threaded, and Welding End

American Water Works Association (AWWA) C652, 2002, Disinfection of Water-Storage Facilities

DSN-450 Mark II, Dec 1988, Dual Axis Doppler Sonar Speed Log Instruction Manual

Manufacturers' Standardization Society of the Valve and Fittings Industry (MSS) SP-80, 2008 Edition, Bronze Gate, Globe, Angle and Check Valves

Manufacturers Standardization Society of the Valve and Fittings Industry (MSS) SP-72, 1999 Edition, Ball Valves with Flanged or Butt-Welding Ends for General Service

Manufacturers Standardization Society of the Valve and Fittings Industry (MSS) SP-67, 2002 Edition, Butterfly Valves

Manufacturers Standardization Society of the Valve and Fittings Industry (MSS) SP-61, 2003 Edition, Pressure Testing Of Steel Valves

ODOM Echotrac DF3200 MKII Technical Manual, May 1996

The Society for Protective Coatings (SSPC)/NACE International (NACE), 2007, Joint Surface Preparation Standard SSPC-SP 10/NACE No.2, Near-White Blast Cleaning

International Standard Organization (ISO) 4406, 1999, Hydraulic Fluid Power - Fluids - Method for Coding Level of Contamination by Solid Particles

ASTM International (ASTM) D1330, 2004, Standard Specification for Rubber Sheet Gaskets

ASTM International (ASTM) D4174, 2005, Standard Practice for Cleaning, Flushing, and Purification of Petroleum Fluid Hydraulic Systems

ASTM International (ASTM) E797, 2005, Standard Practice for Measuring Thickness by Manual Ultrasonic Pulse-Echo Contact Method

ASTM International (ASTM) F992, 2006, Standard Specification for Valve Label Plates

Page x (Rev 0)

List of Government-furnished Property

The following is a list of property, which the Government will furnish. This list supersedes any other material obligations indicated or implied by referenced drawings.

WORK

ITEM MTI ITEM DESCRIPTION NSN/PN QTY

ESTIMATED

COST

($/UNIT)

2 Y **Propeller shaft NSN: 2010-01-135-7065 2 ea. 228,600.00 5 N **Stern tube Bearing NSN: 3120-01-189-1949 2 ea. 16,646.00

N **Propeller Strut Bearing NSN: 3120-01-189-1087 2 ea. 12,375.00

N **Intermediate Strut Bearing NSN: 3120-01-189-1088 2 ea. 11,217.00

6 N **Stern Tube Sleeve (Forward) NSN: 2010-01-340-6083 2 ea. 7,386.00

N **Stern Tube Sleeve (Aft) NSN: 2010-01-345-2315 2 ea. 7,193.98

N **Propeller Strut Sleeve (Forward) NSN: 2010-01-345-2314 2 ea. 9,541.92

N **Propeller Strut Sleeve (Aft) NSN: 2010-01-340-5362 2 ea. 8,196.00

7 N Overhaul kit NSN: 5330-01-527-0959 2 ea. 35,894.00 Y **Stern tube split seal NSN: 5330-01-359-5555 4 ea. 9,763.86 8 N Hub installation kit NSN: 2010-01-470-3258 2 ea. 715.00

Y **Left hand hub assembly NSN: 2010-01-119-5469 1 ea. 304,313.00

Y **Right hand hub assembly NSN: 2010-01-118-8538 1 ea. 304,313.00

N ***CPP Tool Kit N/A 1 set 20,000.00

N *"Special tools" (see 4.2 (Government-loaned installation tools))

N/A 1 set 1,000.00

9 Y **Propeller Blade-LH (Port) NSN: 2010-01-119-3972 1 Set 40,000.00

Y **Propeller Blade-RH (Stbd) NSN: 2010-01-120-2871 1 Set 40,000.00

N O-Ring NSN: 5330-01-120-5229 8 ea. 97.00 N O-Ring NSN: 5330-01-118-8529 8 ea. 96.00 N Blade Washer NSN: 5310-01-335-4361 48 ea. 112.00 N O.D. Box Inspection Kit NSN: 3010-01470-3519 2 ea. 330.00 N Filter NSN: 4330-01-177-4069 12 ea. 92.00 Y **Oil Feed Bushing NSN: 3120-12-329-5287 2 ea. 8,111.00 N **Ball Bearing NSN: 3110-00-156-6745 2 pr. 46.00 N **Bearing Bushing NSN: 2010-01-469-8639 2 ea. 450.00 N **Bearing Bushing NSN: 3120-12-198-7607 8 ea. 559.00 N **Spool valve assembly NSN: 4820-01-513-2509 2 ea. 17,800.00

10 Y ***DSN 450 Mark II Dual Axis Doppler Sonar Speed Log

NSN: 5845-01-130-3490 1 ea. 20,509.00

11 N ***V850 Color Echo Sounder NSN: 5845-01-518-7245 1 ea. 1,723.41

Page xi (Rev 0)

Y ***ODOM Echotrac DF3200 MKII NSN: 5845-01-460-9969 1 ea. 14,530.00

15 N Dual Rotary Pump NSN: 4320-01-118-1251 2 ea. 988.46

N Hydraulic cylinder Rod

Packing Shim and Ring Kit

NSN: 3040-01-118-5840 2 ea. 339.48

Y **Hydraulic Cylinder NSN: 3040-01-123-6695 2 ea. 9,738.00 16 Y **Rudder Assembly NSN: 2040-01-486-0550 2 ea. 181,000.00 N **Upper Bearing NSN: 3110-01-121-8032 2 ea. 4,323.00 N **Rudder Stock Sleeve NSN: 2040-01-F91-0187 2 ea. 12,000.00 N John Crane Seal kit NSN: 5330-01-527-0778 2 ea. 5,458.00

N **Thordon Lower

Bearing (SXL 20.7" X 17.5" X 14)

PN: F546150102 2 ea. 1,000.00

17 N Seal PN: 17855H1L5 4 ea. 152.00 N O-Rings PN: MS9021-381 4 ea. 3.00 N Packing NSN: 5330-00-902-5505 2 Roll 177.00 N Packing NSN: 5330-00-527-7496 16 FT 5.00 N **Thordon Bearing Set PN: TG-13886 OPTION 3 2 ea. 9,200.00 N Inflatable Seal NSN: 5330-01-103-6518 2 ea. 989.00 N **Roller Bearing NSN: 3110-00-155-9065 2 ea. 1,800 N Preformed packing NSN: 5331-01-306-4879 2 ea. 15.00 N O-ring PN: MS9021-359 2 ea. 90.00 N O-ring PN: MS9021-377 2 ea. 156.00 N Seal, Plain PN: 17444H1L5 4 ea. 60.00 N **Seal Retainer NSN: 5330-01-382-7103 2 ea. 228.00 N **Lantern Rings NSN: 4320-01-377-2106 2 ea. 1,167.00 N **Seal Housing NSN: 5330-01-382-9160 2 ea. 1,622.00 Y **Fin Stock with sleeves NSN: 3040-01-104-5121 2 ea. 18,109.00 N **Threaded-end rod PN: 1857336 2 ea. 400.00 N *Fin Removal Tools None. 1 set 15,000.00 24 N *Transducer cover plate N/A 3 ea. 300.00 *Government-loaned property, which shall be returned to the vessel upon completion of the availability.

**New or refurbished equipment that the Government may provide for installation in place of existing equipment.

***Government-furnished property, which is to be supplied by either the vessel, Electronic Systems Support Unit (ESU) or local Electronic Support Detachment (ESD).

Page xii (Rev 0)

List of Critical Inspection Items

The following is a list of work items, which contain Critical Inspection reports, which the Contractor must complete within the first 25% of the availability contract period (see Std Spec 0000_STD, paragraph

3.6.2 (Inspection report particulars)):

Work Item Title

1 Perform Ultrasonic Thickness Measurements - Underwater Hull Plating

2 Remove, Inspect, and Reinstall Propeller Shafts

9 Service Both Onboard Controllable Pitch Propeller Systems

16 Service Rudder Assemblies

17 Service Fin Stabilizer Systems

18 Preserve, Repair and Disinfect Potable Water Tanks – 100%

27 Preserve Bilge Pockets

28 Preserve Designated Tank Top Surfaces

29 Preserve Designated Bilge and Tank Top Surfaces

30 Preserve Compartment Bilge Surfaces – 100%

33 Repair Hull Plating, Deck Plating and LO Fill Box

Page xiii (Rev 0)

Specification Feedback

The intent of this section is to inform all users that a spec feedback mechanism is in place, and is located on the MLCA Naval Engineering Division’s website. Spec feedback is a very important part of our overall continuous improvement process, and is crucial to specification development. It will allow spec writers to capture all specification-related lessons learned, and avoid mistakes or ambiguities in follow-on availabilities. All feedback will be reviewed, evaluated, and responded to in a timely manner.

If you have access to the CGWeb (Intranet), please use the following link, which will connect you to the MLCA(v) Naval Engineering website, for submitting your feedbacks:

http://webapps.mlca.uscg.mil/vdiv/specifications/feedback/default.cfm

If you do not have access to the CGWeb (Intranet), you may still submit your feedbacks, using the following web link:

http://www.uscg.mil/mlclant/vdiv/specfeedback.asp http://webapps.mlca.uscg.mil/vdiv/specifications/feedback/default.cfm� http://www.uscg.mil/mlclant/vdiv/specfeedback.asp�

Page xiv (Rev 0)

PC_270B WMEC

(21 Sep 2004)

Principal Characteristics

270B WMEC (B CLASS) MEDIUM ENDURANCE CUTTER

Length Overall 270' 0"

Depth (main deck at side to baseline) 33' 3"

Maximum Beam 38' 5/8"

Frame Spacing 1' 0"

Full Load Draft 13.85'

Full Load Displacement 1825.64 long tons

Shore Tie Voltage Requirements 450 vac, 400A, 3 phase cables

PROPELLER / SHAFT

Number of Propellers 2

Number of Blades per Propeller 4

Diameter of Propeller 9'

Pitch Controllable

Revolutions per Minute (RPM) 260

Shaft Diameter 10.55" at exit of hull

Page 1 (Rev 0)

00000_DLA_FLT (23 Oct 2008)

General Requirements

1. SCOPE

1.1 Intent. This item describes the general requirements to be followed by the Contractor while conducting this availability.

1.2 Government-furnished property.

None.

2. APPLICABLE DOCUMENTS

Coast Guard Maintenance and Logistics Command Atlantic (MLCA), Standard Specification 0000_STD, 2006 Edition, General Requirements

Coast Guard Maintenance and Logistics Command Atlantic (MLCA) Standard Specification 0740_STD, 2004 Edition, Welding and Allied Processes

Coast Guard Commandant Instruction (COMDTINST) M10360.3 (series), Jun 2006, Coatings and Color Manual

3. REQUIREMENTS

3.1 General. The Contractor shall conform to all requirements specified in Std Spec 0000_STD and in this item, as applicable, during the performance of this availability.

NOTE

The requirements of paragraph 3.1 (General) applies to all work under the scope of this contract, whether explicitly stated in work items or not, and also to all other work subsequently authorized by changes, modifications, or extensions to the contract.

3.2 Contractor-provided fire extinguishers. The Contractor shall provide portable fire extinguishers.

3.3 Welding and brazing requirements. The Contractor shall perform all welding and allied processes, and nondestructive inspection (NDI), in accordance with Std Spec 0740_STD.

3.4 Term substitution - COTR for COR. The Contractor shall be aware that the term "COR" (Contracting Officer's Representative) has been discontinued in favor of "COTR" (Contracting Officer's Technical Representative); consequently, whenever "COR" is encountered in this specification package, including referenced standard specifications and other referenced documents, it shall refer to "COTR", explicitly.

Page 2 (Rev 0)

3.5 Small boat storage. The Contractor shall remove two small boats as interference to Contractor-work;

and shall provide a suitable pier side storage cradle, for safely storing said boats.

3.5.1 Cradle design. Ensure that the temporary cradle meets the following criteria:

1. Structure is templated from the geometry and arrangement of the contact support areas of the existing cradle onboard the vessel, to provide same or more support area as that which is provided by the existing cradle.

2. Arrangement will allow ship's force to perform maintenance on the small boat, without modification of the cradle.

3. Structure is manufactured using the most economical methods and materials available, and is capable of supporting the full weight of the small boat under normal conditions experienced during routine maintenance.

4. Contact surfaces are no harder or rougher than the contact surfaces for existing cradle onboard the vessel.

3.5.2 Boat accessibility. Ensure the storage is located in the vicinity of the vessel, and is unrestricted, to allow for ship's force to complete maintenance during normal working hours for the entire performance period.

3.5.3 Boat protection. Provide full protection that can be safely and completely secured when the small boat is left unattended (e.g. watertight cover, storage in a warehouse or shop, etc.), in addition to isolating the boat from the elements.

3.5.4 Boat transportation. Transport each small boat to its storage area within one week of docking the vessel and back to the vessel prior to the end of the performance period.

3.6 Software and fasteners. The Contractor shall renew all disturbed software (gaskets, o-rings, seals, etc.), and any fasteners (lockwashers, cotter pins, etc.) damaged during removal as interference.

4. NOTES

4.1 Access to COMDTINST M10360.3. The COMDTINST M10360.3 may be accessed at the following URL address:

http://www.uscg.mil/directives/cim.asp

4.2 QA inspection forms. QA inspection forms (QA-1 thru QA-5), required in Std Spec 0000_STD to be completed and submitted during preservation of "critical-coated surfaces", are provided at the end of this item.

http://www.uscg.mil/directives/cim.asp�

Page 3 (Rev 0)

QA-1: QUALITY ASSURANCE INSPECTION FORM - PRESERVATION CHECKLIST

CHECKPOINT 1 - COATING SYSTEM COMPLIANCE

Ensure all coatings are in compliance with COMDTINST M10360.3, Appendix C.

CHECKPOINT 2 - PAINT STORAGE

Ensure all coatings are kept at a temperature of 65 to 85°F at all times, unless otherwise specified by the coating manufacturer(s).

CHECKPOINT 3 - AMBIENT CONDITIONS

Ensure surface and surrounding temperatures are each between 50 and 90°F for water-based coatings, and 35 and 95°F for other coatings, unless otherwise specified by the coating manufacturer(s).

Ensure maximum relative humidity (RH) is as follows, from surface preparations through final curing of topcoat: 50% for tanks, voids, and vent plenum; and 85% for all other areas, unless otherwise specified by manufacturer(s).

Ensure surface temperature is at least 5°F above the dew point, unless otherwise specified by the coating manufacturer(s).

CHECKPOINT 4 - PRE-SURFACE PREPARATION

Remove surface contaminants (soluble salts, loose rust, mud, and marine growth) with low pressure fresh water wash down (maximum 5,000 psi). If oil and grease are present, perform solvent cleaning, as per SSPC SP-1.

CHECKPOINT 5 - SURFACE PREPARATION

Verify environmental conditions (see CHECKPOINT 3).

Ensure cleanliness of prepared surface is as per specification (i.e.: SSPC SP-12, SP-11, SP-10?).

Verify surface anchor profile (1.5-3.5 mils for abrasive-blasted steel surfaces; 1.0 mil (minimum) for power-tool cleaned surfaces; 1.0-1.5 mils for abrasive-blasted aluminum surfaces); and 1.5 -2.5 for surfaces to be coated w/single coat of inorganic zinc).

Measure soluble salt conductivity (5 measurements per 1000 sqft) - maximum threshold: 70 microsiemens/cm for non-submerged surfaces and 30 microsiemens/cm for submerged surfaces.

CHECKPOINT 6 - PRIMER COAT APPLICATION

Verify environmental conditions (see CHECKPOINT 3).

Verify proper mixing and stand-in (induction) times.

Ensure no paint is applied when the temperature is expected to drop to freezing before the paint has dried.

Ensure surfaces are completely dry, unless otherwise allowed by the Coating Manufacturer(s).

Verify wet film thickness at random, to prevent under or over application.

Brush out all runs, sags, drips, and puddles.

Perform visual inspection for holidays and other defects.

CHECKPOINT 7 - STRIPE COAT APPLICATION

Verify environmental conditions (see CHECKPOINT 3).

Ensure overcoating window is as per manufacturer's instructions.

After primer coat (mist coat after inorganic zinc), brush-apply un-thinned coat of same primer paint over edges, weld seams, cut-outs, and areas of complex geometries @ 3-4 mils wet film thickness (WFT).

CHECKPOINT 8 - TOP COAT APPLICATION

Verify environmental conditions (see CHECKPOINT 3).

Ensure overcoating window is as per manufacturer's instructions.

Verify proper mixing and stand-in (induction) times, as applicable.

Verify wet film thickness at random, to prevent under or over application.

Brush out all runs, sags, drips, and puddles.

CHECKPOINT 9 - FINAL INSPECTION

Verify final system dry film thickness.

Verify system cure for service resumption - U/W Body surfaces: 5-8 hours @ 77 degrees F; Potable water tanks: 7 days @

77 degrees F.

Ensure potable water tank exhaust ventilation is maintained continuously from and during coating application through final system cure (minimum 7 days @ 77 degrees F.), to exhaust all solvent to the atmosphere and to prevent solvent entrapment.

CHECKPOINT 10 - RECORD KEEPING

Complete, sign, and submit all provided QA Inspection Forms.

Signature of Inspector:______________________________________________________Date:____________

Page 4 (Rev 0)

QA-2. QUALITY ASSURANCE INSPECTION FORM

ENVIRONMENTAL READINGS

(Use one sheet for each activity. Record conditions every four hours from before surface preparation to application of final coating system coat)

DATE TIME

ENTER ACTIVITY

(Surface preparation, primer coat, barrier coat, top coat, etc?)

LOCATION DEW

POINT

SURFACE

TEMP.

% REL.

HUMIDITY

SIGNATURE

OF

INSPECTOR

.Signature of Inspector:__________________________________________________Date:____________

Page 5 (Rev 0)

QA-3 QUALITY ASSURANCE INSPECTION FORM

SURFACE PROFILE LOG

Vessel Name And Hull Number:__________________________________________________

Work Item Title:_______________________________________________________________

Location Of Work (Including Frame Numbers):_____________________________________

Area (Square Feet):_____________

Surface Preparation Method:_____________________________________________________

Abrasive Manufacturer And Size:_________________________________________________

Degreasing Method Used:________________________________________________________

Number Of Hours Surfaces (Steel Only) Left Unpainted:______________________________

Sweep blasting performed to remove flash rusting (steel)? Yes/No:_____________________

Place Surface Profile Replica Tapes In The Spaces Provided Below, To Serve As Permanent QA record.

Maintain separate log for each area/location. When an Area Is Divided Into Separate Sections, Maintain A Separate Log for Each Section.

AVERAGE MILS

(IAW ASTM D4417,

METHOD C)

Place Surface Profile Replica Tape Here

Reading:__________ mils

• Place Surface Profile Replica Tape Here

Date and Time:__________________________________________________

Location of Surface Profile Measurements:___________________________________________________________

Signature of Inspector:____________________________________________________________________________

Page 6 (Rev 0)

QA-4. QUALITY ASSURANCE INSPECTION FORM

SURFACE SOLUBLE SALT CONDUCTIVITY LOG

Vessel Name and Hull Number:__________________________________________________

Work Item Title:_______________________________________________________________

Location of Work (including frame numbers):_______________________________________

Area (square feet):____________

DATE TEST LOCATIONS CONDUCTIVITY

(microsiemens/cm)

Date and Time:_________________________________________

Signature of Inspector:___________________________________

Page 7 (Rev 0)

QA-5. QUALITY ASSURANCE DATA FORM

DRY FILM THICKNESS (DFT) MEASUREMENTS IAW SSPC PA-2

(Use one sheet for each sequence)

Vessel Name and Hull Number:__________________________________________________

Work Item Title:______________________________________________________________

Coating Manufacturer:_________________________________________________________

Product Name:________________________________________________________________

Batch Number:________________________________________________________________

Induction Time:_______________________________________________________________

Coating System Sequence (Indicate whether: primer, touch-up primer, barrier coat, 3rd coat?):__________________

DFT

MEASUREMENT

NUMBER

LOCATION OF READINGS MEASURED DFT

Application Method (Airless, Conventional Spray, Rolled):____________________

Average DFT: __________________________________________________________

Date and Time: _________________________________________________________

Signature of Inspector: ___________________________________

Page 8 (Rev 0)

11003_UT.UWB_TEF_FLT (03 Dec 2008) 911_DLA (02 Oct 2009)

WORK ITEM 1: Perform Ultrasonic Thickness Measurements - Underwater Hull Plating

1. SCOPE

1.1 Intent. This work item describes the requirements for the Contractor to perform 100 thickness measurements of underwater hull plating, by ultrasonic methods.

1.2 Government-furnished property.

None.

2. APPLICABLE DOCUMENTS

ASTM International (ASTM) E797, 2005, Standard Practice for Measuring Thickness by Manual Ultrasonic Pulse-Echo Contact Method

Coast Guard Drawing 905 WMEC 111-001, Rev D, Shell Expansion Fwd 101

Coast Guard Drawing 905 WMEC 111-002, Rev E, Shell Expansion Aft Fr 182

Coast Guard Drawing 905 WMEC 111-003, Rev E, Shell Expansion Fr 101 - 182

3. REQUIREMENTS

3.1 General.

3.1.1 Critical Inspection Report. The Contractor shall submit a critical inspection report (CIR) for the inspections listed in the following paragraph, within 24 hours after inspection completion:

• 3.2 (Thickness measurement particulars).

3.2 Thickness measurement particulars. The Contractor shall perform 100 ultrasonic thickness measurements, in locations designated by the Coast Guard Inspector. Submit a CIR. Ensure that the ultrasonic apparatus, procedure requirements, and report shall be in accordance with ASTM E797, and the report results shall additionally include the following, for each test point:

• Location.

• Original metal thickness.

• Measured metal thickness.

Page 9 (Rev 0)

• Percent deterioration (calculation is based on the original metal thickness). Refer to Coast Guard Drawings 905 WMEC 111-001, 905 WMEC 111-002 and 905 WMEC 111-003 for guidance.

3.3 Apparatus Standardization. The Contractor shall perform ultrasonic equipment standardization in accordance with ASTM E797, Section 7 (Standardization of Apparatus) and Section 8 (Technical Hazards).

4. NOTES

This section is not applicable to this work item.

Page 10 (Rev 0)

24310_MWS_FLT (14 Jan 2009) 270 B WMEC (12 Jan 2009)

WORK ITEM 2: Remove, Inspect, and Reinstall Propeller Shafts

1. SCOPE

1.1 Intent. This work item describes the requirements for the Contractor to remove, inspect, and reinstall port and starboard propeller shafts.

1.2 Government-furnished property.

MTI ITEM DESCRIPTION NSN/PN QTY

ESTIMATED

COST

($/UNIT)

Y **Propeller shaft NSN: 2010-01-135-7065 2 ea. 228,600.00

2. APPLICABLE DOCUMENTS

Coast Guard Maintenance and Logistics Command Atlantic (MLCA) Standard Specification 0740_STD, 2004 Edition, Welding and Allied Processes

Coast Guard Drawing 905 WMEC 243-001, Rev B, Shafting Arrangement

Coast Guard Drawing 905 WMEC 243-002, Rev E, Stern Tubes Strut Brg and Seal Arr and Det

Coast Guard Drawing 905 WMEC 243-003, Rev-, Shaft Removal Arrangement

Coast Guard Drawing 905 WMEC 243-012, Rev A, Controllable Pitch Propeller Shafting Details

3. REQUIREMENTS

3.1 General.

3.1.1 Critical Inspection Report. The Contractor shall submit a critical inspection report (CIR) for the inspections listed in the following paragraph(s):

• 3.2.2 (Inspections).

3.1.2 Interferences. The Contractor shall be aware that interferences in way of work include, but are not limited to the following:

• Rope guard.

• Fairwaters.

Page 11 (Rev 0)

3.2 Work to be accomplished. Using Coast Guard Drawings 905 WMEC 243-001, 905 WMEC 243-002, 905 WMEC 243-003, and 905 WMEC 243-012 as guidance, as applicable, the Contractor shall accomplish the following for port and starboard propeller shafts:

3.2.1 Removals. Remove and clean all (inner and outer) CPP oil tubes free of all oil and grease.

• Mark existing shaft position, and match-mark shaft coupling bolts to their respective holes, to facilitate reinstallation procedures.

• Remove the shaft and attached components to a suitable repair facility. Ensure shaft is properly protected and supported at all bearing journals, at all times, until reinstallation.

3.2.2 Inspections. Clean the shaft free of all marine growth, and accomplish the following inspections, as applicable (Submit CIR):

3.2.2.1 Visual. Visually inspect the following components, as applicable, for excessive wear and other mechanical defects such as nicks, cracks, and corrosion:

• Shaft surfaces.

• Bearing and bearing housing surfaces.

• All shaft and propeller associated fasteners.

• Stern tube surfaces.

• Couplings.

• Stern tube/shaft sealing systems.

• Packing ring and glands.

• Rope guards and fairwaters.

NOTE

Before taking shaft runout readings, spin the shaft on a lathe for approximately two hours at the vessel’s maximum rated RPM to eliminate any sagging that may have occurred during handling and storage.

3.2.2.2 Measurements.

• Measure keys and keyways.

• Measure all bearing sleeve or journal diameters.

• Measure runouts for shaft taper, shaft straightness, and coupling end diameters.

• With the key in-place, fit the shaft coupling to the shaft in shop and check the contact percentage by bluing. If the contact is less than 80%, the Contractor shall grind and hand stone the coupling hub to achieve a minimum of 80 percent contact, and verify by bluing again. Make a small inscription on the shaft to mark the coupling hub location and use it as a reference in final assembly. Measure and record the coupling face runouts.

3.2.2.3 Porosity. Inspect the shaft fiberglass covering for porosity as follows:

3.2.2.3.1 Visually inspect the plastic covering for evidence of lack of adhesion, and other defects.

Page 12 (Rev 0)

3.2.2.3.2 Conduct a high voltage spark test of the covering at 250 to 300 volts per mil of glass reinforcement (approximately 15,000 volts for a four-ply covering). Pay particular attention to the joining line between sleeves, couplings, and shafts.

3.2.2.4 Borescope inspection. Visually inspect the interior surfaces of the stern tube(s) using a borescope.

3.2.2.5 Nondestructive inspection. Perform nondestructive inspection of all bearing sleeves, shaft tapers, coupling bolts, keyways, and welded surfaces, in accordance with Std Spec 0740_STD, Appendix C.

3.2.3 Reinstallation. Reinstall the propeller shaft to its original configuration and accomplish the following, using Coast Guard Drawings 905 WMEC 243-001, 905 WMEC 243-002, 905 WMEC 243-003, and 905 WMEC 243-012, as applicable.

3.2.3.1 Renew all O-rings for all CPP oil tube connections (inner and outer) and coupling flanges during reinstallation.

3.2.3.2 Take care not to damage the sleeves, fiberglass coating, the taper and threads during installation.

3.2.3.3 Ensure the propeller shaft is properly aligned to its original position using the reference marks established prior to its removal.

3.3 Government-furnished shaft. The Contractor shall be aware that the Government reserves the right to furnish a spare propeller shaft(s) to be installed in lieu of the one removed. After a Change Request has been released and authorized by the KO, the Contractor shall transport the spare shaft to a suitable inspection facility, perform the inspections specified in paragraph 3.2.2 (Inspections), and submit a CFR.

3.4 Post-repair operational testing. In the presence of the Coast Guard Inspector, the Contractor shall thoroughly test and prove the shafting system to be in satisfactory operating condition (see 4.1 (Equipment operation)).

Conduct a sea trial to test the propeller shaft(s) in all modes of operation for a minimum of 4 hours. Inspect and correct any excessive leakage, abnormal noise and excessive vibration. Submit a CFR.

4. NOTES

4.1 Equipment operation. Coast Guard personnel will operate all shipboard machinery and equipment during all operational tests.

4.2 Seal renewal. Stern tube seal renewal, if required, is covered under a separate work item of this specification package.

4.3 Stern tube repair. Historically, 270 WMEC cutters have had severe pitting and erosion problems in the stern tube areas; the stern tube surfaces have been repaired with a Belzona compound, which has proven very effective in stopping deterioration due to corrosion and erosion.

Page 13 (Rev 0)

24340_MWS_FLT (14 Jan 2009)

WORK ITEM 3: Renew Shaft Covering

1.1 Intent. This work item describes the requirements for the Contractor to renew the fiberglass reinforced plastic (FRP) covering for a designated propeller shaft.

1.2 Government-furnished property.

None.

2. APPLICABLE DOCUMENTS

MIL-STD-2199, Oct 1993, Glass Reinforced Plastic Coverings for Propeller Shafting

Coast Guard Commandant Instruction (COMDTINST) M10360.3 (series), Coatings and Color Manual

The Society for Protective Coatings (SSPC)/NACE International (NACE), 2007, Joint Surface Preparation Standard SSPC-SP 10/NACE No.2, Near-White Blast Cleaning

3. REQUIREMENTS

3.1 Related work. The Contractor shall accomplish the work specified herein in conjunction with all propulsion shaft system removal and reinstallation tasks specified in this package.

3.2 Renewal procedures. The Contractor shall perform the FRP covering renewal in accordance with MIL-STD-2199, and as specified herein:

3.2.1 Surface preparation.

3.2.1.1 Remove and dispose of all existing FRP covering over the shaft surfaces.

3.2.1.2 Abrasive-blast the bare shaft surfaces to a "Near-White Blast" standard, in accordance with SSPC SP-10/NACE No. 2, and obtain a surface anchor profile of 3.0-4.5 mils.

CAUTION

Exercise extreme care not to damage shaft and shaft sleeve surfaces during covering removal and surface preparation.

3.2.2 Shaft surface inspection. Perform a visual inspection of the cleaned shaft surfaces for signs of corrosion, wear, and other defects; submit a CFR.

Page 14 (Rev 0)

3.2.3 New covering installation. Before the cleaned shaft surfaces begin to flash-rust, accomplish the following:

• Prepare resin in accordance with manufacturer's recommendations, and apply a coat to the cleaned shaft surfaces, not to exceed a total of 60 mils thickness.

• Apply a ply of glass tape wound spirally onto the coated surfaces, butting the edges.

• Repeat the resin and glass tape applications, reversing the direction of the spiral warp for each subsequent application, until a four-ply covering has been formed.

• Ensure that all entrapped air is worked out, and the glass tape is wet-out properly, during each ply installation.

3.2.4 Covering inspection. Conduct a high voltage spark test of the covering, after it has hardened, at 250 to 300 volts per mil of glass reinforcement (approximately 15,000 volts for the four-ply covering), paying particular attention to the joining line between sleeves, couplings, and shafts. Submit a CFR.

3.2.5 Preservation of covering. Upon completion of covering inspection, and after all repairs, if any, prepare and coat the FRP covering, using the system specified for "Underwater Water (U/W) Body and Boot-Top (U/W Body and Boot-Top, Steel Hulls (Up to 7 Years), in Salt Water)" , in COMDTINST M10360.3, Appendix A (Cutters and Boats Exterior Coating Systems).

3.3 Quality control. The Contractor shall observe the quality control procedure specified in paragraph

5.5 (Quality control) of MIL-STD-2199.

Page 15 (Rev 0)

24350_MWS_FLT (18 Sep 2008) 270B WMEC (23 Jan 2004)

WORK ITEM 4: Straighten Shaft

1.1 Intent. This work item describes the requirements for the Contractor to straighten a designated shaft.

1.2 Government-furnished property.

None.

2. APPLICABLE DOCUMENTS

MIL-STD-2191, Nov 1992, Repair Welding, Weld Cladding, Straightening, and Cold Rolling of Main Propulsion Shafting

Coast Guard Maintenance and Logistics Command Atlantic (MLCA) Standard Specification 0740_STD, 2004 Edition, Welding and Allied Processes

Coast Guard Drawing 905 WMEC 243-001, Rev B, Shafting Arrangement

Coast Guard Drawing 905 WMEC 243-012, Rev A, Controllable Pitch Propeller Shafting Details

3. REQUIREMENTS

3.1 General.

3.2 Shaft straightening requirements. Based on inspection results obtained from a related shaft work item in this specification package, or provided by the Coast Guard Inspector, the Contractor shall straighten the designated shaft, using Coast Guard Drawings 905 WMEC 243- 001, 905 WMEC 243-012, and MIL-STD-2191 as guidance and as specified herein.

3.2.1 Pre-straightening inspection. Prior to initiating straightening processes, determine the location, magnitude and type of bend in the shaft, with the entire shaft supported on centers in a lathe, as follows:

• Before taking shaft runout readings, spin the shaft on the lathe for approximately two hours to eliminate any sagging that may have occurred during handling and storage.

• Conduct a dial indicator survey of shaft runout at stations spaced every two feet of shaft length to determine the magnitude and location of the bend.

Page 16 (Rev 0)

• At each station, mark the position of maximum runout on the periphery of the shaft.

NOTE

Be aware that the marks on the shaft periphery will be in a straight line if the shaft contains a simple bend, and will spiral part way around the shaft, if the shaft is both bent and twisted.

• Plot the maximum runout to an exaggerated scale, in order to locate the center of the bend, and to determine the extent of straightening required.

• Submit a CFR including locations and magnitudes of the bend.

3.2.2 Straightening procedures. Straighten the shaft to equal or less than 0.005" total indicator runout, using the localized heating (hot spotting method for carbon steel shafts, in accordance with MIL-STD-2191, Section 11.2.2.2 and sub-paragraphs).

3.2.3 Post-straightening inspections. After completion of straightening procedures, accomplish inspections, and submit a CFR:

• Conduct non-destructive inspection of all straightened areas in accordance with Std Spec 0740_STD, Appendix C.

• Recheck the shaft surfaces, as specified in paragraph 3.1.2.1 (Pre-straightening inspection).

Page 17 (Rev 0)

24400_MWS_FLT (10 Sept 2008) 270B WMEC (14 Jan 2009)

WORK ITEM 5: Renew Water-Lubricated Shaft Bearings

1.1 Intent. This work item describes the requirements for the Contractor to renew the water-lubricated bearings for a designated propeller shaft.

1.2 Government-furnished property.

MTI ITEM DESCRIPTION NSN/PN QTY

ESTIMATED

COST

($/UNIT)

N **Stern tube Bearing NSN: 3120-01-189-1949 2 ea. 16,646.00 N **Propeller Strut Bearing NSN: 3120-01-189-1087 2 ea. 12,375.00 N **Intermediate Strut Bearing NSN: 3120-01-189-1088 2 ea. 11,217.00

2. APPLICABLE DOCUMENTS

Coast Guard Drawing 905 WMEC 243-001, Rev B, Shafting Arrangement

Coast Guard Drawing 905 WMEC 243-002, Rev E, Stern Tubes Strut Brg and Seal Arr and Det

3. REQUIREMENTS

3.1 General. Not applicable.

3.2 Bearing renewal. The Contractor shall accomplish the following, using Coast Guard Drawings 905 WMEC 243-001 and 905 WMEC 243-002 as guidance:

3.2.1 Removal. Remove the existing water-lubricated bearings for a designated propeller shaft; dispose of the removed bearings after visually inspection for any abnormal wear patterns which may indicate misalignment. Submit CFR.

3.2.2 Inspections.

3.2.2.1 Visual. Visually inspect the following:

• Chocking material, if installed in the bearing housings.

• Bearings.

• Bearing housing bores.

• Shaft journal in way of bearings.

Page 18 (Rev 0)

3.2.2.2 Measurements. Measure the inner diameter of each bearing housing at the forward, middle and aft positions.

3.2.2.3 Documentation. Submit a CFR after the inspection and measurements.

3.2.3 New bearing installation. The Contractor shall accomplish the following to the Government-furnished water-lubricated bearings, using Coast Guard Drawings 905 WMEC 243-001 and 905 WMEC 243-002 as guidance:

3.2.3.1 In the presence of the Coast Guard Inspector, the Contractor shall check the alignment of the stern tube, forward seal flange, and bearing carriers relative to the shaft centerline including any offsets by running a taut line, using the optical scopes method, or using laser alignment.

3.2.3.2 Machine the new bearings to fit the bearing housing in accordance with the manufacturer's installation recommendations. Drill and tap new bolt holes on the new bearings to match the bearing housings for proper fit.

3.2.3.3 Install the new water-lubricated bearings in accordance with the bearing manufacturer's recommendations, using new monel or type 316 stainless steel fasteners.

3.3 Final measurement. After bearing installation, the Contractor shall:

3.3.1 Measure final bearing clearances at 90-degree intervals around the shaft at both ends of each bearing if accessible.

3.3.2 Submit a CFR after taking the measurements.

3.3.3 Minimum operating bearing clearance shall be as follows:

DIAMETER OF

JOURNAL

(INCHES)

MINIMUM OPERATING

CLEARANCE OF NEW WATER-

LUBRICATED BEARINGS (INCHES)

3 0.022 4 0.025 5 0.027 6 0.030 7 0.032 8 0.035 9 0.037

10 0.040 11 0.042 12 0.045 13 0.047 14 0.050

3.4 Inspection and operational test. The Contractor shall accomplish the following:

3.4.1 Visual inspection. Visually inspect the new bearings and record bearing clearances, after shaft reinstallation.

3.4.2 Operational test. Conduct an operational test of the shaft during sea trials, to ensure there is no evidence of binding, abnormal vibration, and noise during sea trials.

Page 19 (Rev 0)

3.4.3 Inspection and test documentation. Submit a CFR upon completion of inspection and test.

Page 20 (Rev 0)

24420_MWS_FLT (18 Sep 2008) 270B WMEC (14 Jan 2009)

WORK ITEM 6: Renew Propeller Shaft Sleeve(s)

1.1 Intent. This work item describes the requirements for the Contractor to renew the sleeve(s) on a designated propeller shaft.

1.2 Government-furnished property.

MTI ITEM DESCRIPTION NSN/PN QTY

ESTIMATED

COST

($/UNIT)

N **Stern Tube Sleeve (Forward) NSN:2010-01-340-6083 2 ea. 7,386.00 N **Stern Tube Sleeve (Aft) NSN:2010-01-345-2315 2 ea. 7,193.98 N **Propeller Strut Sleeve (Forward) NSN:2010-01-345-2314 2 ea. 9,541.92 N **Propeller Strut Sleeve (Aft) NSN:2010-01-340-5362 2 ea. 8,196.00

2. APPLICABLE DOCUMENTS

Coast Guard Maintenance and Logistics Command Atlantic (MLCA) Standard Specification 0740_STD, 2004 Edition, Welding and Allied Processes

Coast Guard Drawing 905 WMEC 243-001, Rev B, Shafting Arrangement

Coast Guard Drawing 905 WMEC 243-002, Rev E, Stern Tubes Strut Brg and Seal Arr and Det

Coast Guard Drawing 905 WMEC 243-012, Rev A, Controllable Pitch Propeller Shafting Details

NAVSEA Drawing 803-2145807, Rev C, Propulsion Shafting and Components

3. REQUIREMENTS

3.1 General. Not applicable.

3.2 Sleeve renewal requirements. Using Coast Guard Drawings 905 WMEC 243-001, 905 WMEC 243- 002, and 905 WMEC 243-012 as guidance, the Contractor shall accomplish the following, for a designated propeller shaft:

3.2.1 Removal. Remove and dispose of the sleeve(s).

3.2.2 Inspections. Clean all shaft journal surfaces, and accomplish the following:

Page 21 (Rev 0)

3.2.2.1 Perform a visual inspection of the shaft journal surfaces for corrosion, deterioration, and other signs of failures.

3.2.2.2 Measure and record in the shaft journal outside diameter and the shaft bearing inside diameter in the following positions:

• Forward.

• Middle.

• Aft.

3.2.2.3 Conduct nondestructive testing of all shaft surfaces in the way of sleeve fit areas, in accordance with Std Spec 0740_STD, Appendix C.

3.2.3 Inspection report. The Contractor shall submit a CFR for the completed inspection and measurements.

3.2.4 New sleeve installation requirements. After the Coast Guard Inspector has reviewed all measurements, the Contractor shall accomplish the following tasks for the Government-furnished shaft sleeves:

3.2.4.1 Machine/cut each sleeve to the required length

3.2.4.2 Bore new sleeve ID to the dimensions based on the recorded journal outside diameter readings, to facilitate an interference fit, as specified below.

3.2.4.3 Install the new sleeves onto the shaft with a shrink-fit equal to 0.00075-inch per inch of shaft diameter, in accordance with NAVSEA DRAWING 803-2145807, Table 8-1 (Shaft Sleeve Shrink Fit).

3.2.4.4 After installation, machine the sleeve OD based on the shaft bearing ID readings, including the required bearing clearance.

3.2.5 Concentricity measurement. Check the outside diameter of each shaft sleeve to ensure it is concentric with the axis of rotation within 0.0005 inch (0.001 inch runout).

3.2.6 Polishing. Polish the sleeve…