903_DD_BRC_10R1.pdf

(September 30, 2009 / Rev-0)

USCGC HARRIET LANE (WMEC-903)

270 FOOT A CLASS MEDIUM ENDURANCE CUTTER

SPECIFICATION FOR DRYDOCK REPAIRS

Developed By:

LTJG Brad Clemons

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

USCGC HARRIET LANE (WMEC-903) 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 xi

List of Critical Inspection Items xiv

Specification Feedback xv

Principal Characteristics xvi

General Requirements 1

1 Perform Ultrasonic Thickness Measurements 8

2 Perform Anchor and Anchor Chain Maintenance 10

3 Clean and Inspect Ballast Tanks and Voids 12

4 Remove, Inspect, and Reinstall Propeller Shafts 15

5 Repair and Renew Thrust Bearings 19

6 Inspect Stern Tube Seal Assemblies 22

7 Renew Starboard Shaft Covering 26

8 Renew Port Shaft Covering 28

9 Straighten Shaft 30

10 Replace Water-Lubricated Shaft Bearings 33

11 Remove and Reinstall Controllable Pitch Propeller Hubs 36

12 Service Both Onboard Controllable Pitch Propeller Systems 40

Page ii (Rev-0)

13 Service Rudder Assemblies 51

14 Service Fin Stabilizer Systems 64

15 Clean Ship Service Diesel Generator Exhaust Stacks 72

16 Overhaul and Renew Sea Valves 76

17 Perform Magazine Sprinkler Valve Maintenance 81

18 Overhaul Exhaust Valve 84

19 Perform Inspection and Maintenance of TALON Helicopter Landing Grid 87

20 Perform Commissary Hoist Maintenance 91

21 Renew Through Hull Transducers 95

22 Routine Drydocking 99

23 Provide Temporary Logistics 103

24 Preserve Anchor and Anchor Chain 106

25 Preserve Ballast Tanks and Voids - 100% 108

26 Preserve Ballast Tanks and Voids - Partial 111

27 Preserve Underwater Body – “100%” 114

28 Renew Pump Foundation 116

29 Renew Ventilation Expansion Joint 118

30 Renew Lube Oil Fill Deck Box and Cap 120

31 Renew Fuel Vent Piping 122

32 Inspect and Repair Fan Coil Units 124

33 Renew Air Handlers 127

34 Renew Hull Insulation 131

35 Renew Propeller Shaft Sleeve(s) 133

36 Preserve Bilge Surfaces 136

37 Preserve Freeboard Surface 138

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

25Sep09 1 1 Corrected drawing reference 25Sep09 1 3 Corrected inflatable seal test procedures 30Sep09 1 - Updated GFE costs

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-DTL-24643, Aug 2007, Cable and Cord, Electrical, Low Smoke, for Shipboard Use

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

MIL-PRF-16173, Jan 1993, Corrosion Preventive Compound, Solvent Cutback, Cold Application

MIL-PRF-17672, May 1995, 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

Page vi (Rev-0)

DOD-STD-2003, Dec 1990, Electric Plant Installation, Standard Methods for Surface Ship and Submarines

Code of Federal Regulations (CFR) Title 29, Part 1915, 2005, Occupational Safety and Health Standards for Shipyard Employment

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

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 3141_STD, 2004 Edition, Overhaul Electrical Rotating Machines

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 162-001, Rev I, Stacks

Coast Guard Drawing 901 WMEC 184-010, Rev F, Transducer Foundations & Shell Mods

Coast Guard Drawing FL 6713-201, Rev B, CRP-V850 Transducer (B-

14) Adapter Assembly

Coast Guard Drawing 901 WMEC 186-003, Rev-, Talon Grid Foundations and Structural Modifications

Page vii (Rev-0)

Coast Guard Drawing 901 WMEC 243-001, Rev K, Shafting Arrangement

Coast Guard Drawing 901 WMEC 243-002, Rev G, Stern Tubes, Strut Bearing & Seal Arrangement and Details

Coast Guard Drawing 901 WMEC 243-002, Rev G, Stern Tubes Strut Brg and Seal Arr and Det

Coast Guard Drawing 901 WMEC 243-006, Rev C, Shaft Seal Assembly and Details

Coast Guard Drawing 901 WMEC 243-003, Rev F, Shaft Removal Arrangement

Coast Guard Drawing 901 WMEC 243-004, Rev E, CPP Shafting Details

Coast Guard Drawing 901 WMEC 243-008, Rev A, Hub & Rudder Removal Pad eye A & D

Coast Guard Drawing 901 WMEC 245-001, Rev E, CPCH Propeller Hydraulic System Diagram

Coast Guard Drawing 901 WMEC 245-003, Rev E, Propeller Hub Assembly

Coast Guard Drawing 901 WMEC 245-004, Rev E, Blade and Palm

Coast Guard Drawing 901 WMEC 245-007, Rev B, Special Tools

Coast Guard Drawing 901 WMEC 245-008, Rev C, Actuating Unit

Coast Guard Drawing 901 WMEC 245-009, Rev L, CPCH Propeller Hydraulic System Diagram

Coast Guard Drawing 901 WMEC 259-001, Rev F, Diesel Exhaust System Diagram

Coast Guard Drawing 901 WMEC 259-002, Rev K, Diesel Exhaust System Arrangements & Details (A&D)

Coast Guard Drawing 901 WMEC 259-004, Rev-, SSDG Modification - Exhaust System Mod

Coast Guard Drawing 901 WMEC 264-001, Rev H, L/O Fill, Transfer and Purification System Arrangement and Details

Page viii (Rev-0)

Coast Guard Drawing 901 WMEC 521-007, Rev G, Firemain System, Machinery Space - Arrangement & Detail

Coast Guard Drawing 901 WMEC 521-011, Rev A, Adapter Assembly for New Fire Pumps

Coast Guard Drawing 901 WMEC 522-001, Rev F, Magazine Sprinkler System, Arrangement & Details

Coast Guard Drawing 901 WMEC 541-001, Rev G, Fuel Oil Fill and Transfer System Diagram

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

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

Coast Guard Drawing 901 WMEC 565-007, Rev H, Fin Stabilizer Machinery Assembly

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

Coast Guard Drawing 901 WMEC 572-001, Rev G, Service Hoist, Installation and Details

Coast Guard Drawing 901 WMEC 581-001, Rev G, Anchor Handling A & D

Coast Guard Drawing 901 WMEC 634-002, Rev-, C & A, Paint, Deck Covering, and Insulation Mod Talon Grid

Coast Guard Drawing 901 WMEC 801-022, Rev H, Docking Plan

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

Coast Guard Drawing 905 WMEC 514-020, Rev E, Chilled & Hot Water System Diagram

Coast Guard Drawing 905 WMEC 514-022, Rev B, Sheet 1 and 2, CHW & HW PIPING SYSTEM MN DK & BLW A&D

Coast Guard Drawing FL-588-001, Rev C, Talon Grid Support Skirt Replacement

Coast Guard Drawing FL-8301-002, Rev A, Talon Helo Landing Grid Stanchion Bolt with Locknut

Page ix (Rev-0)

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

NAVSEA Drawing 804-5773931, Rev A, Acoustic & Thermal Insulation For Compartments Installation Details

NAVSEA Drawing 804-5959214, Rev-, Piping Insulation - Installation Details

PUBLICATIONS

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

Coast Guard Technical Publication, TP-2698, Section F, Instruction Book for Main Thrust Bearing, Amend 1, June 2006

Coast Guard Technical Publication (TP), 2699, Technical Manual for the Controllable-Pitch Propeller, March 2006

Coast Guard Technical Publication (TP) 2718, SWB 561, Section A, Oct 2008, Steering Gear System, and SWBS 562, Section A, Oct 1992, Rudderstock Seal Assembly

Coast Guard Technical Publication (TP) 2719, Dec 1977, Fin Stabilizer Machinery & Hydraulics Subsystems WMEC 270 Class Ship

Coast Guard Technical Publication (TP) 2721, Jan 1992, SWBSS 5722, Technical Manual for Commissary Hoist System, for 270' WMEC (A-Class)

Coast Guard Technical Publication (TP) 2698, Feb 2006, SWBS 243, Section A, Manufacturer's Instruction Book-SWBS Group(s) 242-245

Coast Guard Technical Publication (TP) 2831, Nov 2007, Manufacturer’s Instruction Book (SWBS 514 to 521)

Coast Guard Technical Publication (TP) 3368, Feb 2006, Technical Documentation Helicopter Land Grid TYPE 18-22-01

INDUSTRY STANDARDS

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

Manufacturers' Standardization Society of the Valve and Fittings Industry (MSS) SP-80, 2003 Edition, Bronze Gate, Globe, Angle and Check Valves

Page x (Rev-0)

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

The Society for Protective Coatings (SSPC)/NACE International (NACE), 2004, 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, Re-approved 1999, Standard Practice for Cleaning, Flushing, and Purification of Petroleum Fluid Hydraulic Systems

ASTM International (ASTM) D5363, 2003, Standard Specification for Anaerobic Single Component Adhesives

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

ASTM International (ASTM) F683, May 2008, Standard Practice for Selection and Application of Thermal Insulation for Piping and Machinery

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

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

ODOM Echotrac DF3200 MKII Technical Manual, May 1996

DSN-450 Mark II, Dec 1981, Dual Axis Doppler Sonar Speed Log Instruction Manual

Page xi (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)

4 Y **Propeller shaft NSN:2010-01-135-7065 2 ea. 228,555.00 5 Y Thrust Bearing pt#7956-11, SKF-29452 4 ea. 12,000.00 5 N Split Seal NSN:5330-01-129-6961 8 ea. $123.77 6 N Overhaul kit NSN:5330-01-527-0959 2 ea. 30,604.28 6 Y **Stern tube split seal NSN:5330-01-359-5555 4 ea. 9,951.42

10 N Stern tube Bearing NSN: 3120-01-189-1949 2 ea. 16,495.67 10 N Propeller Strut

Bearing NSN: 3120-01-189-1087 2 ea. 5,965.41

10 N Intermediate Strut Bearing NSN: 3120-01-189-1088 2 ea. 12,153.00

11 N Hub installation kit NSN: 2010-01-470-3258 2 ea. 662.94

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

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

11 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

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

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

12 N O-Ring NSN: 5330-01-120-5229 8 ea. 111.06 12 N O-Ring NSN: 5330-01-118-8529 8 ea. 113.86 12 N Blade Washer NSN: 5310-01-335-4361 48 ea. 120.45 12 N O.D. Box

Inspection Kit NSN: 3010-01470-3519 2 ea. 418.50

12 N Filter NSN: 4330-01-177-4069 12 ea. 84.98 12 Y **Oil Feed Bushing NSN: 3120-12-329-5287 2 ea. 8126.50 12 N **Ball Bearing NSN: 3110-00-156-6745 2 pr. 40.16 12 N **Bearing Bushing NSN: 2010-01-469-8639 2 ea. 450.00 12 N **Bearing Bushing NSN: 3120-12-198-7607 8 ea. 709.75 12 N **Spool valve assembly NSN: 4820-01-513-2509 2 ea. 17,800.00

13 Y **Rudder Assembly NSN: 2040-01-486-0550 2 ea. 181,852.50 13 N **Upper Bearing NSN: 3110-01-121-8032 2 ea. 3,910.91 13 N ***Rudder Stock

Sleeve NSN: 2040-01-F91-0187 2 ea. 11,896.00

Page xii (Rev-0)

13 N John Crane Seal kit

NSN: 5330-01-527-0778 2 ea. 5,436.11

13 N **Thordon Lower Bearing (SXL 20.7" X 17.5" X 14)

PN: F546150102 2 ea. 1,000.00

14 N Seal PN: 17855H1L5 4 ea. 155.00 14 N O-Rings PN: MS9021-381 4 ea. 5.80 14 N Packing NSN: 5330-00-902-5505 2 Roll 209.50 14 N Packing NSN: 5330-00-527-7496 16 FT 3.70 14 N **Thordon Bearing

Set Assembly PN: TG-13886 OPTION 3 2 ea. 6,200.00

14 N Inflatable Seal NSN: 5330-01-103-6518 2 ea. 689.00 14 N **Roller Bearing NSN: 3110-00-155-9065 2 ea. 1,800 14 N Preformed packing NSN: 5331-01-306-4879 2 ea. 15.00 14 N O-ring MS9021-359 2 ea, 90.00 14 N O-ring MS9021-377 2 ea. 156.00 14 N Seal, Plain PN: 17444H1L5 4 ea. 60.00 14 N **Seal Retainer NSN: 5330-01-382-7103 2 ea. 228.00 14 N **Lantern Rings MSN: 4320-01-377-2106 2 ea. 1,167.00 14 N **Seal Housing NSN: 5330-01-382-9160 2 ea. 1,622.00 14 N **Tiller pin NSN: 5315-01-419-1523 4 ea. 525.00 14 N **Hydraulic

Cylinder NSN: 3040-01-103-6565 4 ea. 4,426.57

14 N **Shaft Sleeve NSN: 3120-01-352-51390 2 ea. 3,515.04 14 Y **Fin Stock with sleeves NSN: 3040-01-104-5121 2 ea. 16,109.00

14 N **Threaded-end rod PN: 1857336 2 ea. 400.00 14 N *Fin Removal Tools None. 1 set 15,000.00

N

6" FWD MAG

Sprinkler Control Valve 250 PSI

(MIL-V-1750)

Overhaul Kit

PN: 9454709j 1 ea. 319.00

N

1 1/2" Pressure Regulating Valve for AFT MAG Outside AFT MAG Door Overhaul Kit (Serial Number 5734) (FIG Number 442M)

PN: 94547020 1 ea. 168.00

19 N M12 Bolts N/A 12 ea 12.00 19 N M16 Bolts NSN: 5305-01-393-1827 24 ea. 24.34

N

**Talon Grid Stanchion Bolt Assembly, Including Locking Nut

NSN: 5340-01-481-3786 96 ea. 42.46

21 N ***V850 Color Echo Sounder NSN: 5845-01-518-7245 1 ea. 1,794.69

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

Page xiii (Rev-0)

Y

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

NSN: 5845-01-130-3490 1 ea. 20,282.00

21 N ***Gate Valve and Installation Kit PN: 939053-1 1 ea. 1,925.00

22 N *Transducer cover plate N/A 3 ea. 50.00

33 N Air Handler PN: 061-1-F 2 ea. 1,065.65

35 N **STERN TUBE

SLEEVE (FWD) NSN:2010-01-340-6083 2 ea. 6,721.52

35 N **STERN TUBE

SLEEVE (AFT) NSN:2010-01-345-2315 2 ea. 8,637.48

35 N **PROPELLER STRUT

SLEEVE (FWD) NSN:2010-01-345-2314 2 ea. 9,033.33

35 N **PROPELLER STRUT

SLEEVE (AFT) NSN:2010-01-340-5362 2 ea. 7,431.18

*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 xiv (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

4 Remove, Inspect, and Reinstall Propeller Shafts

5 Repair and Renew Thrust Bearings

12 Service Both Onboard Controllable Pitch Propeller Systems

13 Service Rudder Assemblies

14 Service Fin Stabilizer Systems

19 Perform Inspection and Maintenance of TALON Helicopter Landing Grid

Page xv (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/defaul t.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

Page xvi (Rev-0)

PC_270A WMEC

(21 Sep 2004)

Principal Characteristics

270A WMEC (A CLASS) MEDIUM ENDURANCE CUTTER

Length Overall 270' 0"

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

Maximum Beam 37' 9-3/8"

Height of Highest Projection (above DWL) 90 ft.

Frame Spacing 1' 0"

Full Load Draft 13.85'

Full Load Displacement 1825.64 long tons

Shore Tie Voltage Requirements 450 vac, 400A, 3 phone 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.

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.

NOTICE!

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

Page 2 (Rev-0)

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.

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.

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)

11001_TEF_FLT (03 Dec 2008)

WORK ITEM 1: Perform Ultrasonic Thickness Measurements

1. SCOPE

1.1 Intent. This work item describes the requirements for the Contractor to perform thickness measurements of plating sections designated by the COTR, 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

3. REQUIREMENTS

3.1 Thickness measurement particulars. The Contractor shall

perform ultrasonic thickness measurements, in sets of 100 up to a maximum of 2000, in locations designated by the COTR. Submit a CFR. 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.

• Percent deterioration (calculation is based on the original metal thickness).

3.2 Apparatus Standardization. The Contractor shall perform

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

Page 9 (Rev-0)

This section is not applicable to this work item.

Page 10 (Rev-0)

58110W_FLT (03 Jan 2008) 270 WMEC (08 Jul 2009)

WORK ITEM 2: Perform Anchor and Anchor Chain Maintenance

1. SCOPE

1.1 Intent. This work item describes the requirements for the Contractor to perform maintenance for both anchor and anchor chain assemblies, including associated ground tackle.

1.2 Government Furnished Property

None

2. APPLICABLE DOCUMENTS

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

Coast Guard Drawing 901 WMEC 581-001, Rev G, Anchor Handling A & D

3. REQUIREMENTS

3.1 General.

3.1.1 Reference documents. The Contractor shall perform the

work described herein in accordance with Std Spec 5000_STD and Coast Guard Drawing 901 WMEC 581-001.

3.2 Inspection and repair requirements. The Contractor shall

accomplish the following for both assemblies:

ADDITIONAL REQUIREMENTS

# TASK TYPE QTY COMPONENT OR

ASSEMBLY

APPENDIX

AND

PARA.

FROM

5000_STD

OTHER

Page 11 (Rev-0)

ADDITIONAL REQUIREMENTS

# TASK TYPE QTY COMPONENT OR

ASSEMBLY

APPENDIX

AND

PARA.

FROM

5000_STD

OTHER

1 Service and Inspect

1 Anchor Chain Assembly

N/A Remove and reinstall anchor (at the swivel shot) and chain assembly.

Verify that no link has lost more than 10% base material (wire diameter). Submit CFR.

Renew all detachable taper pin and link assemblies and associated link plugs.

Renew shackle at bitter end of chain.

Change the relative position of the shots, as designated by the Coast Guard Inspector, to distribute the wear on the chain.

2 Service and Inspect

1 Pelican Hook Assembly

N/A Submit CFR.

NOTICE!

Each anchor weighs 4,000 pounds and each chain is 1-1/2 inch Die-Lock, with a length of 8 shots, as shown on Coast Guard Drawing 901 WMEC 581-001. All shots of anchor chain include the corresponding detachable link(s).

Page 12 (Rev-0)

12316_DLA_FLT (10 Sept 2008) 12316_270A (11 Jan 2007)

WORK ITEM 3: Clean and Inspect Ballast Tanks and Voids

1. SCOPE

1.1 Intent. This work item describes the requirements for the Contractor to clean and inspect the following:

TYPE OF STRUCTURE LOCATION CAPACITY

(GALLONS)

Ballast 4-103-1-W 8,378 Ballast 4-103-2-W 8,378

*Tank also used as for storing grey water - considered immediately dangerous to life and health (IDLH).

1.2 Government-furnished property.

None.

2. APPLICABLE DOCUMENTS

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

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

3. REQUIREMENTS

3.1 General. The Contractor shall do the following for the

tanks designated in paragraph 1.1 (Intent):

3.1.1 Operational test - initial. Prior to commencement of

work, the Contractor shall witness an operational pre-test (by Coast Guard personnel) of all affected tank TLIs to demonstrate existing operational condition. Submit a CFR.

3.1.2 Content removal. Remove and dispose of all fluid

contents, in accordance with all applicable Federal, state, and local regulations.

Page 13 (Rev-0)

3.1.3 Cleaning requirements. Remove access cover(s). Clean

the tank structure's interior surfaces free of all foreign materials, such as sediment or sludge. Remove all persistent residues, taking care not to damage the tank coating system.

Remove cleaning media and residues continuously from the tank during the washing process. Remove any residual wash media and wipe up residual moisture with clean lint-free cloths. Collect, contain, and dispose of all wash media, residues, and cleaning materials in accordance with all Federal, state, and local regulations.

3.1.4 Inspection. Visually inspect all tank interior surfaces;

including, but not limited to bulkheads, floor and overhead plating, structural members, manhole cover surfaces, fasteners and gasket seating surfaces. Submit a CFR including the following, as applicable:

• Structural condition.

• Inaccessible areas.

• Condition of coating, including measurements taken, percentage, location, and type of coating failure.

• Tank level indicator (TLI) and/or float switch condition.

• Sounding tube and striker plate condition.

• Suction and discharge piping condition.

• Fastener material and condition (correct fastener material is stainless steel).

3.2 Ultrasonic thickness measurement. The Contractor shall

perform a total of 200 thickness measurements of the tank surfaces, in locations designated by the COTR. Submit a CFR.

The ultrasonic apparatus, procedure requirements, and report shall be in accordance with ASTM E797. The report results shall additionally include, for each test point:

• Location.

• Original metal thickness.

• Measured metal thickness.

• Percent deterioration (calculation is based on the original metal thickness).

Page 14 (Rev-0)

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

3.3 Closing. The Contractor shall keep the manhole(s)

uncovered for approximately 24 hours, after completion of the tasks specified above. Notify the COTR at least 24 hours prior to closing the tank(s). After satisfactory inspection by the Coast Guard Inspector, and after completion of all authorized work, in the presence of the Coast Guard Inspector reinstall manhole cover(s) with new gasket material conforming to ASTM D1330.

3.4 Operational test - final. After all authorized work is

complete, in the presence of the Coast Guard Inspector, the Contractor shall thoroughly test and prove the TLIs to be in satisfactory operating condition (see 4.1 (Equipment operation)). Submit a CFR.

4. NOTES

4.1 Equipment operation. Coast Guard personnel will operate

all shipboard machinery and equipment during all operational tests.

Page 15 (Rev-0)

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

WORK ITEM 4: 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. 228,555.00

2. APPLICABLE DOCUMENTS

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

Coast Guard Drawing 901 WMEC 243-001, Rev K, Shafting Arrangement

Coast Guard Drawing 901 WMEC 243-002, Rev G, Stern Tubes, Strut Bearing & Seal Arrangement and Details

Coast Guard Drawing 901 WMEC 243-003, Rev F, Shaft Removal Arrangement

Coast Guard Drawing 901 WMEC 243-004, Rev E, CPP 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).

Page 16 (Rev-0)

3.1.2 Related work items. The Contractor shall accomplish this work item in conjunction with the following, which are separate work items in this specification package:

• "Inspect Both Controllable Pitch Propeller System Hub Assemblies."

• "Remove and Install CPP System Hub Assemblies."

• “Renew Water Lubricated Shaft Bearings.”

• “Repair and Renew Thrust Bearings.”

3.1.3 Interferences. The Contractor shall be aware that

interferences in way of work include, but are not limited to the following:

• Rope guard.

• Fairwaters.

3.2 Work to be accomplished. Using Coast Guard Drawings 901 WMEC 243-001, 901 WMEC 243-002, 901 WMEC 243-003, and 901 WMEC 243-004 as guidance, as applicable, the Contractor shall accomplish the following for port and starboard propeller shafts:

3.2.1 Removals. Remove and clean all 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 surfaces.

• All shaft and propeller associated fasteners.

• Stern tube surfaces.

• Couplings.

Page 17 (Rev-0)

• Stern tube/shaft sealing systems.

• Packing ring and glands.

• Shaft bearing sleeves.

NOTICE!

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 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.

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 Visually inspect the interior surfaces of the stern

tube(s) using a borescope; and submit a CFR.

3.2.2.5 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 901 WMEC 243-001, 901 WMEC 243-002, 901 WMEC 243-003, and 901 WMEC 243-004, as applicable.

Page 18 (Rev-0)

3.2.3.1 Renew all O-rings for the CPP oil tube connections 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 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 Government-furnished sleeves. The Contractor shall be aware that the Government reserves the right to furnish new bearing sleeves to be installed in lieu of those removed.

3.5 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 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 Stern tube seal renewal. Stern tube seal renewal, if

required, is covered under a separate work item of this specification package.

4.3 Stern tube repairs. 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 19 (Rev-0)

2432M.270A.RWI(1099)

903_BRC(09 Jul 2009)

WORK ITEM 5: Repair and Renew Thrust Bearings

1. SCOPE

1.1 Intent. This work item describes the requirements for the Contractor to inspect and repair both port and starboard thrust bearings.

1.2 Government-furnished property.

MTI ITEM DESCRIPTION NSN/PN QTY ESTIMATED COST

($/UNIT)

Y Thrust Bearings pt#7956-11, SKF-29452 4 ea. 12,000.00 N Split Seal NSN:5330-01-129-6961 8 ea. $123.77

2. APPLICABLE DOCUMENTS

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

Coast Guard Technical Publication, TP-2698, Section F, Instruction Book for Main Thrust Bearing, Amend 1, June 2006

Coast Guard Technical Publication (TP), 2699, Technical Manual for the Controllable-Pitch Propeller, March 2006

Coast Guard Drawing 901 WMEC 243-001, Rev K, Shafting Arrangement

Coast Guard Drawing 901 WMEC 243-003, Rev F, Shaft Removal Arrangement

3. REQUIREMENTS

3.1 General. The Contractor shall (1) open and inspect the

thrust bearings assemblies, (2) provide a recommended solution to correct the thrust readings, and (3) implement the repairs accordingly. Accomplish this work item in conjunction with "Service Both Onboard Controllable Pitch Propeller Systems” which is a separate work item of this specification.

Page 20 (Rev-0)

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

• 3.4 (Inspections).

3.1.2 Interferences. The Contractor shall be aware that

interferences include but are not limited to the following:

• Deck plates and support structure

• Thrust bearing oil

• Oil lines

3.2 Protection. The Contractor shall protect the shafts from

damage at all times.

3.3 Inspection. The Contractor shall examine thrust bearings

and determine possible causes of excessive thrust readings, as well as documenting general material condition, using the TP- 2699, as a guide.

3.4 Report. The Contractor shall Submit a (CIR) for all

findings and a recommended repair solution to COTR after all the inspections have been complete.

3.5 Repair and installation. The Contractor shall reinstall

the thrust bearings following all authorized repairs for each thrust bearing assembly.

3.5.1 Reinstall the bearing assemblies as shown in the

applicable drawings in Section 2 and in accordance with TP-2699, Section 8-4.D; and TP-2698, Section F, Chapter IV, after the completion of all required work. Furnish and install new seals for the thrust bearing assemblies.

3.5.2 Following all authorized repairs, re-fill the thrust

bearing assemblies with bearing manufacturer’s recommended lubricant.

3.5.3 Government-furnished thrust bearings. The Contractor

shall be aware that the Government reserves the right to furnish a new thrust bearing to be installed in lieu of the one removed.

3.6 Repair report. The Contractor shall submit a CFR

documenting all repairs.

3.7 Operating Test. The Contractor shall demonstrate proper

operation of the thrust bearings and thrust shafts. Conduct a sea trial to test the propulsion shaft in all modes of operation for a minimum of 4 hours. Inspect and correct any leakage, abnormal noise and excessive vibration.

Page 21 (Rev-0)

3.7.1 During the operational test period the Contactor shall

allow the crew time to conduct a Coast Guard PMS check of the thrust bearing.

Page 22 (Rev-0)

24360_MWS_270 (24 Oct 2008) 270A WMEC (06 Feb 2006)

WORK ITEM 6: Inspect Stern Tube Seal Assemblies

1. SCOPE

1.1 Intent. This work item describes the requirements for the Contractor to inspect and overhaul the stern tube seals for the port and starboard propulsion shafts, located in the Reefer & Dry Stores (4-169-0-A).

1.2 Government-furnished property.

MTI ITEM DESCRIPTION NSN/PN QTY

ESTIMATED

COST

($/UNIT)

N Overhaul kit NSN:5330-01-527-0959 2 ea. 30,604.28 Y **Stern tube split seal NSN:5330-01-359-5555 4 ea. 9,591.42

2. APPLICABLE DOCUMENTS

Coast Guard Drawing 901 WMEC 243-002, Rev G, Stern Tubes Strut Brg and Seal Arr and Det

Coast Guard Drawing 901 WMEC 243-006, Rev C, Shaft Seal Assembly and Details

Coast Guard Technical Publication (TP) 2698, Feb 2006, SWBS 243, Section A, Manufacturer's Instruction Book-SWBS Group(s) 242-245

3. REQUIREMENTS

3.1 General.

3.1.1 Related work items. The Contractor shall accomplish this work item in conjunction with the following, which are separate work items in this specification package:

• “Remove, Inspect, and Reinstall Propeller Shafts.”

Page 23 (Rev-0)

3.1.2 Technical representative services. The Contractor shall provide an on-site qualified technical representative, familiar with the John Crane type MA stern tube seal system, who shall advise on manufacturer's proprietary information, dimensions, and clearances associated with the system, assist with proper repair methods, and ensure compliance with manufacturer's procedures and standards during disassembly, inspection, and reassembly of the John Crane type MA seal system. The technical representative shall be a Wartsila-Lipps technical representative or its licensee. The Tech Rep must be present when work is being performed on John Crane seal assemblies and subassemblies; and during seal assembly installation.

3.1.3 Interferences. The Contractor shall be aware that

interferences in way of work include, but are not limited to the following:

• Deck plating and framing.

• Shelves/supply storage.

• Safety grating.

• Propulsion shaft.

• Cooling water piping.

• Air line.

3.2 Overhaul requirements. Using Coast Guard Drawings 901 WMEC 243-002, and 901 WMEC 243-006 as guidance and under the supervision of the tech rep, the Contractor shall overhaul the port and starboard stern tube seal assemblies, in accordance with TP-2698 and as specified below.

3.2.1 Seat machining. Machine the seal seats in accordance

with TP-2698.

3.2.2 Seal compression setting. Set the stern tube seal

compression during the installation in accordance with Coast Guard TP-2698.

3.2.3 Alignment of seat. Align each seat to run true with its associated shaft in accordance with TP-2698:

3.2.3.1 Attach a dial indicator so as to indicate either the

face of the seat, aft side of the face carrier, or the flat side of the forward main clamp ring near the butt joint, to indicate relative misalignment of the seat in relation to the stationary face insert, as the shaft rotates.

Page 24 (Rev-0)

3.2.3.2 Engage turning gear to rotate the shaft.

3.2.3.3 Adjust the alignment bolts and drive bolts to have a

total indicator reading of 0.002" or less while the shaft is rotating. Take readings for three complete revolutions of the shaft.

3.2.3.4 Once alignment is complete, lock the alignment bolts

with their locking nuts while the shaft is rotating and the indicator is still installed. Recheck alignment, after locking, in the presence of the Coast Guard Inspector.

3.2.3.5 Disengage turning gear and install splash guard onto

the face carrier.

3.3 Tests. Under the Tech Rep’s supervision, the Contractor

shall perform the following tests to the port and starboard stern tube seal assemblies, and submit a CFR:

3.3.1 Stern tube seal leak test. Pressurize the stern tube

seal with clean fresh water through the flanged water connections at the bottom of the mounting ring to 20 psig.

Inspect and correct for any leakage.

3.3.2 Inflatable seal air test. Perform the following

inflatable seal testing in accordance with TP-2698

3.3.2.1 Pressurize the inflatable seal to 40 psi using

Nitrogen, in lieu of Carbon Dioxide.

3.3.2.2 Visually inspect to ensure all pipe joints are tight.

3.3.2.3 With seal inflated to 40 psi, shut off all supply

valves, and monitor air leakage. Pressure shall not drop more than 5 psi in 15 minutes. Correct any discrepancy noted.

WARNING!

Do not rotate shaft while testing inflatable seal!

3.3.3 Inflatable seal water leakage test.

3.3.3.1 After the vessel is waterborne, operate inflatable seal at 40 psi, pressurize the seal cavity with water to 10 psi, and conduct the test in accordance with TP-2698.

3.3.3.2 When the test is satisfactorily completed, slowly open drain the water and seal pressures in accordance with TP-2698.

Page 25 (Rev-0)

3.3.3.3 Once seal cavity is drained, measure the seal leakage which shall not exceed one pint per minute. Take corrective action if the leakage is exceeding one pint per minute.

3.3.3.4 Align the seal water flush lines for normal operation.

3.4 Seal…