NANTUCKET__(WPB_110A)_UPDD_KWR_13R0.pdf

USCGC NANTUCKET (WPB 1316)

110 FOOT "A CLASS" PATROL BOAT (USCG)

SPECIFICATION FOR EMERGENCY DRYDOCK REPAIRS

FY2013

Developed By: Kent W Ross

(Rev-0, 08 February 2013)

USCGC NANTUCKET (WPB-110A) EMERGENCY DRYDOCK AVAILABILITY FY2013

ii (Rev-0)

TABLE OF CONTENTS

Revisions Record ...................................................................................................................................................... iii Consolidated List of References ............................................................................................................................... iv Consolidated List of Government-furnished Property ............................................................................................. vi Consolidated List of Critical Inspection Items ....................................................................................................... viii Principal Characteristics ........................................................................................................................................... ix

GENERAL REQUIREMENTS

WORK ITEM 1: Main Reduction Gear Assembly, Renew WORK ITEM 2: Propulsion Shafting, Remove, Inspect, and Reinstall WORK ITEM 3: Mechanical Shaft Seal Assemblies, Overhaul WORK ITEM 4: Propulsion Shaft Bearings (External), Renew WORK ITEM 5: Propulsion Shaft, Stern Tube Forward Bearing, Renew WORK ITEM 6: Propulsion Shaft, Forward Bearing Housing, Renew WORK ITEM 7: Propeller; Remove, Inspect, and Reinstall WORK ITEM 8: Drydocking WORK ITEM 9: Temporary Services, Provide WORK ITEM 10: Propulsion System, Alignment Check WORK ITEM 11: Data Service, Provide WORK ITEM 12: Sea Trial Performance, Provide Support iii (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.

iv (Rev-0)

CONSOLIDATED LIST OF 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.

All Coast Guard drawings, technical publications, and standard specifications will be provided to contractors by the Coast Guard at an appropriate time, or upon request, free of charge. Other Government documents may be accessed – free of charge – as follows:

MIL/DOD/CID Specifications: http://www.assistdocs.com/search/search_basic.cfm

Commandant Instruction Manuals: http://www.uscg.mil/directives/default.asp

Public Laws, Code of Federal Regulations, U.S Codes, and other Federal Government laws::

www.gpoaccess.gov

The Government is aware of the following internet web links where contractors may procure commercial specifications:

American Welding Society (AWS): http://www.awspubs.com/index.php

ANSI, ASTM, IEEEE, NFPA, ASME, SAE Standards: http://www.techstreet.com/

NFPA: http://www.nfpa.org

SSPC Standards and pictorial guides: http://shopping.netsuite.com/sspcmarketplace

COAST GUARD DRAWINGS

Coast Guard Drawing 110 WPB 085-002, Rev -, Docking Plan Coast Guard Drawing 110 WPB 085-010, Rev B, Docking Plan, Docking/Lifting Cradle (‘A’, ‘B’ & ‘C’ Classes)

Coast Guard Drawing 110 WPB 161-001, Rev A, Main Shaft Strut Details

Coast Guard Drawing 110 WPB 161-002, Rev -, Main Shaft Strut Installation

Coast Guard Drawing 110 WPB 161-003, Rev A, Intermediate Shaft Strut Details

Coast Guard Drawing 110 WPB 161-004, Rev -, Intermediate Shaft Strut Installation

Coast Guard Drawing 110 WPB 241-001, Rev -, Reduction Gear Bolting & Chocking

Coast Guard Drawing 110 WPB 243-005, Rev -, Shaft Locking Device

Coast Guard Drawing 110 WPB 243-006, Rev C, Propulsion Shaft Details

Coast Guard Drawing 110 WPB 245-004, Rev A, Propeller Details

Coast Guard Drawing 110 WPB 245-005, Rev -, Assembly of Oil Injection Equipment

Coast Guard Drawing 110C WPB 161-005, Rev F, Stern Tube Installation Details

Coast Guard Drawing 110C WPB 243-002, Rev B, Propulsion Shafting & Details

COAST GUARD PUBLICATIONS

Coast Guard Technical Publication (TP) 2924, Jun 1990, General Information Book and Operating

Manual for USCG 110 Foot Patrol Boat, Annex 1B, Propeller Renewal Procedure

Coast Guard Technical Publication (TP) 3094, Jan 2002, Manufacturer’s O&M Instruction Book, Paxman

Diesels Limited http://www.assistdocs.com/search/search_basic.cfm http://www.uscg.mil/directives/default.asp http://www.gpoaccess.gov/ http://www.awspubs.com/index.php http://www.techstreet.com/ http://www.nfpa.org/ http://shopping.netsuite.com/sspcmarketplace v (Rev-0)

Coast Guard Technical Publication (TP) 3095, Jul 2005, Manufacturer’s O&M Instruction Book, Paxman

Diesels Limited

Coast Guard Technical Publication (TP) 3096, Jan 2001, Main Diesel Engine and Reduction Gear

Coast Guard Technical Publication (TP) 3495, May 2002, Chapter 243, Installation Duramax Shaft Seal

System

Coast Guard Technical Publication (TP) 3495, May 2002, Duramax Shaft Seal System Installation

Coast Guard Technical Publications 3095, Jul 2005, Manufacturer’s O&M Instruction Book, Paxman

Diesels Limited

Coast Guard Technical Publications 3096, Jan 2001, Main Diesel Engine and Reduction Gear

Surface Forces Logistics Center Standard Specification 0000 (SFLC Std Spec 0000), 2012, General

Requirements

Surface Forces Logistics Center Standard Specification (SFLC Std Spec) 0000, Jan 2009, General

Requirements

Surface Forces Logistics Center Standard Specification 0740 (SFLC Std Spec 0740), 2012, Welding and

Allied Processes

Surface Forces Logistics Center Standard Specification (SFLC Std Spec) 0740, Jan 2009, Welding and

Allied Processes

Surface Forces Logistics Center Standard Specification 6310 (SFLC Std Spec 6310), 2012, Requirements for Preservation of Ship Structures

Surface Forces Logistics Center Standard Specification 8634 (SFLC Std Spec 8634), 2012, Drydocking

Surface Forces Logistics Center Standard Specification 8635 (SFLC Std Spec 8635), 2012, Temporary

Services

OTHER REFERENCES

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

Adhesives

ASTM International (ASTM), D3951, Re-approved 2004, Standard Practice for Commercial Packaging

Code of Federal Regulations (CFR) Title 33 CFR, Jul 2010, Navigation and Navigable Waters

Code of Federal Regulations (CFR) Title 40, Chapter I, 2008, Environmental Protection Agency

Code of Federal Regulations (CFR) Title 49, Chapter I, 2008, Pipeline and Hazardous Materials Safety

Administration, Department Of Transportation

International Organization for Standardization (ISO) 484/2, 1981, Shipbuilding - Ship Screw Propeller -

Manufacturing tolerances - Part 2: Propellers of Diameter Between 0.80 and 2.50m, Inclusive

NAVSEA Technical Publication T9074-AD-GIB-010/1688, (TP 1688), May 1997, Requirements for

Fabrication, Welding, and Inspection of Submarine Structure vi (Rev-0)

CONSOLIDATED 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)

1 Y Reduction gear assembly – ZF Model

BW 1500

NSN: 3010-99-741-9566 1 ea. 79,179.00

1 Y Flex coupling –

American Vulkan

NSN: 3010-99-735-6322 2 ea. 11,337.00

1 N Soft Patch Kit (Aft

Half) - Shuster

P/N: 110-SPKB 1 ea. 659.78

2 N 4" Diameter x 28'

Long, Aquamet-17 propulsion shaft

NSN: 2010-01-445-7940 2 ea. 8,700.00

2 N Oil Injection

Equipment Kit

N/A 1 set 6,000.00

3 N Shaft seal assembly kit

NSN: 5330-01-497-8095 2 ea. 859.48

3 N Shaft seal assembly NSN: 4320-01-497-8057 2 ea. 3,111.84

3 N Emergency Shaft

Seal Inflator Kit

NSN: 5330-01-497-9866 2 ea. 175.00

4 N Main Shaft Strut

Bearing, Bronze and rubber cutlass bearing, 4" ID x 5"

OD x 16” Long

NSN: 3120-01-222-3927 2 ea. 200.00

4 N Intermediate Shaft

Strut Bearing, Bronze and rubber cutlass bearing, 4" ID x 5"

OD x 16” Long

NSN: 3120-01-222-3927 2 ea. 200.00

5 N Stern Tube Bearing, Bronze and Rubber cutlass bearing, 4" ID x 5" OD x 8”

Long

NSN: 3120-01-238-0689 2 ea. 150.00

6 N Forward Bearing

Housing

NSN: 3130-01-442-2863 2 ea. 2,472.11

7 Y Propeller, LH NSN: 2010-01-222-2440 1 ea. 23,445.00

7 Y Propeller, RH NSN: 2010-01-222-2441 1 ea 22,800.00

8 Y Transducer Cover

Plate

N/A 1 ea. 50.00 vii (Rev-0)

*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 or the C4IT ServiceCenter viii (Rev-0)

CONSOLIDATED 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 SFLC Std Spec 0000, paragraph 3.2.6.5

(Inspection report particulars)):

Work

Item Title

3 Propulsion Shafting, Remove, Inspect, and Reinstall

8 Propeller; Remove, Inspect, and Reinstall ix (Rev-0)

PRINCIPAL CHARACTERISTICS

PC_110A_WPB_0909

110’ WPB (“A”-CLASS) PATROL BOAT

PHYSICAL CHARACTERISTICS

Length Overall 110' 0" or 113' if stern flap present

Length between Perpendiculars 104' 1/2"

Depth 10' 1/2"

Beam, Molded 21' 1"

Depth, Molded 10' 11-1/4"

Full Load Draft 6' 5-3/4"

Height of Highest Projection 55'

Full Load Displacement 165.1 long tons

Anchor 210 lb Sea Anchor with 400 ft of 0.5" BBB Chain

Shore Tie Voltage Requirements 450VAC 400A 3PH 60Hz ungrounded

HULL CHARACTERISTICS

Hull BS-4360, GR 43A Steel

Main Weatherdeck & Superstructure 5086 Aluminum Alloy

Frame Spacing Various

Bulkheads Seven watertight transverse

Fin Stabilizers Frame 22-1/2 x (Rev-0)

110’ WPB (“A”-CLASS) PATROL BOAT

MACHINERY CHARACTERISTICS

Main Propulsion Two Paxman Type 16 RP200M (Valenta) V-16 Diesel; 2880 BHP each @

1500 RPM (max)

Reduction Gears Two ZF Model BW 1500 reversible reduction gearboxes; 1.839:1 ratio

Number of Propellers 2

Number of Blades 5

Diameter of Propeller 49.6"

Pitch 61.4"

RPM N/A

Shaft Monel Alloy K500, or AQUAMET 17

Shaft Diameter 4"

Shaft Seal Johnson Duramax split face seal

Shaft Bearings Rubber Cutless or Thordon

Rudders Twin underslung type, 5 sq ft each

Ship's Service Generators Two Caterpillar Type 3304BT diesel; 99KW, 460V, 60Hz, 3-phase, 3-wire

@ 1800 RPM

TANK CAPACITIES

Fuel Oil (95%) 11,250 gal

Fresh Water (100%) 1,760 gal

Lubricating Oil (95%) 109 gal

1 (Rev-0)

00000_1212_FLT

REC_0000_FLT_ Commercial Project @ Contractor’ Facility (1212)

GENERAL REQUIREMENTS

1. SCOPE

1.1 Intent. This standard specification invokes general requirements for conducting ship repair availabilities for

Coast Guard vessels.

2. REFERENCES

COAST GUARD DRAWINGS

None.

COAST GUARD PUBLICATIONS

Surface Forces Logistics Center Standard Specification 0000 (SFLC Std Spec 0000), 2012, General

Requirements

Surface Forces Logistics Center Standard Specification 0740 (SFLC Std Spec 0740), 2012, Welding and

Allied Processes

Surface Forces Logistics Center Standard Specification 6310 (SFLC Std Spec 6310), 2012, Requirements for Preservation of Ship Structures

OTHER REFERENCES

NAVSEA Technical Publication T9074-AD-GIB-010/1688, (TP 1688), May 1997, Requirements for

Fabrication, Welding, and Inspection of Submarine Structure

Code of Federal Regulations (CFR) Title 33 CFR, Jul 2010, Navigation and Navigable Waters

Code of Federal Regulations (CFR) Title 40, Chapter I, 2008, Environmental Protection Agency

Code of Federal Regulations (CFR) Title 49, Chapter I, 2008, Pipeline and Hazardous Materials Safety

Administration, Department Of Transportation

3. REQUIREMENTS

3.1 General. The Contractor shall conform to all requirements specified in SFLC Std Spec 0000 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.

2 (Rev-0)

3.2 Contractor-provided fire watch personnel. The Contractor shall provide fire watch personnel and equipment.

3.2 Fire watch requirements. The Contractor shall refer to 3.3.1.3 (Fire watch requirements) of SFLC Std Spec

0000, in accomplishing the following task:

Provide portable fire extinguishers for Coast Guard fire watch personnel. Coast Guard fire watch is in lieu of contractor personnel during the hours of 0800-1600, Monday through Friday, and limited to two Coast Guard fire watch personnel.

Provide fire watch personnel and fire extinguishers for the duration of the availability period, during and beyond noted Coast Guard fire watch support.

3.3 Preservation requirements. The Contractor shall accomplish all preservation tasks, including touch-ups, in accordance with SFLC Std Spec 6310.

3.4 Welding and brazing requirements. The Contractor shall perform all welding and allied processes, and NDI in accordance with SFLC Std Spec 0740.

NOTE

NAVSEA approval is NOT required for welding procedures submitted but the procedures must be reviewed and shown to satisfy the requirements set forth in NAVSEA TP 1688, by a welding regulatory agency. The requirements for welding Weldox 900 shall be considered the same as those for welding HY-

3.5 HW disposal. The Contractor is considered as the generator of all contract-generated hazardous wastes and shall use its facility’s EPA generator ID number for management, transportation, and disposal of said hazardous wastes. Ensure the following:

3.5.1 Contractor’s hazardous waste handlers shall comply with applicable requirements of 40 CFR 262.

3.5.2 All contract generated hazardous wastes shall be packaged in 49 CFR-compliant containers.

3.5.3 The designated wastes shall be disposed of at a state or Federally-approved and permitted HW TSDF.

3.5.4 Name of destination TSDF shall be submitted to the KO at the Arrival Conference.

4. NOTES

4.1 QA inspection forms. QA inspection forms (QA-1 thru QA-5), required in SFLC Std Spec 0000 to be completed and submitted during preservation of “critical-coated surfaces”, are provided at the end of this document.

3 (Rev-0)

QA-1 - QUALITY ASSURANCE INSPECTION FORM

(PRESERVATION CHECKLIST)

Vessel Name Hull # Work Item # Work Item Title

Location of Work (incl. frame #’s) Area (sqft)

CHECKPOINT 1 – COATING SYSTEM COMPLIANCE

Ensure all coatings are in compliance with SFLC Std Spec 6310, 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 mfgr.

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 mfgr.

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.

Verify equipment setup, blast media, and surface preparation methods match designated test coupon.

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 using ASTM D4417-Methods B or C against SFLC Std Spec 6310. Conduct profile readings at a minimum of 5 locations for the first 1000-sqft area, and 2 locations for each succeeding 1000-sqft area.

Measure soluble salt conductivity in accordance with SSPC-Guide 15. Conduct 5 measurements per each 1000-sqft area (max.

threshold: 70 microsiemens/cm for non-submerged surfaces, 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 (WFT) at random, to prevent under or over application. Verify final DFT.

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. Conduct 5 sets of 3 readings for each of the first 3 100-sqft areas, followed by 5 sets of 3 readings for each succeeding 1000-sqft area.

Ensure that system cure is in accordance with manufacturer's recommendation for intended service.

Ensure potable water tank exhaust ventilation is maintained continuously from and during coating application through final system cure, to exhaust all solvent to the atmosphere and to prevent solvent entrapment.

For immersion coatings (including tank U/W body), record date and time of the following events:

Final coat application: _____/_____; Return to service or removal from environment controls: _____/_____

CHECKPOINT 10 – RECORD KEEPING

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

Name of QP-1/NACE Inspector Signature Cert. # Date / Time

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

ACTIVITY

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

LOCATION

(Frame & Deck, relation to equipment, etc.)

TEMPERATURE

% REL.

HUMID-

ITY DEW

PT.

SURFACE AMBIENT

ΔT

| DP -

Surface |

5 (Rev-0)

QA-3a - QUALITY ASSURANCE INSPECTION FORM

(SURFACE PROFILE LOG FOR PROFILE MEASUREMENTS IAW ASTM D4417-METHOD-C)

Location of Work (Frame References) Area (sqft)

SURFACE PREPARATION METHOD

PROFILE ACHIEVED (mils)

Min Max Mean

SSPC-SP-10/NACE No. 2

SSPC-SP-12/NACE No. 5

SSPC-SP-3

SSPC-SP-11

SSPC-SP-11 (inaccessible area)

Brush-blasting (non-metallic substrate)

Abrasive Manufacturer and Sieve Size: _________________________________

Place surface profile replica tapes in the spaces provided below, to serve as permanent QA record. Maintain a separate log for each location. When an area is divided into separate sections, maintain a separate log for each section.

Place Surface Profile

Replica Tape Here

Reading:__________ mils

Place Surface Profile

Replica Tape Here

Reading:__________ mils

Place Surface Profile

Replica Tape Here

Reading:__________ mils

Place Surface Profile

Replica Tape Here

Reading:__________ mils

Place Surface Profile

Replica Tape Here

Reading:__________ mils

Place Surface Profile

Replica Tape Here

Reading:__________ mils

Place Surface Profile

Replica Tape Here

Reading:__________ mils

Place Surface Profile

Replica Tape Here

Reading:__________ mils

Place Surface Profile

Replica Tape Here

Reading:__________ mils

Place Surface Profile

Replica Tape Here

Reading:__________ mils

Place Surface Profile

Replica Tape Here

Reading:__________ mils

Place Surface Profile

Replica Tape Here

Reading:__________ mils

Place Surface Profile

Replica Tape Here

Reading:__________ mils

Place Surface Profile

Replica Tape Here

Reading:__________ mils

Place Surface Profile

Replica Tape Here

Reading:__________ mils

Mean Mil Reading (IAW ASTM D4417-Method C) for above 15 readings: ______________

6 (Rev-0)

QA-3b - QUALITY ASSURANCE INSPECTION FORM

(SURFACE PROFILE LOG FOR PROFILE MEASUREMENTS IAW ASTM D4417-METHOD-B)

SURFACE PREPARATION METHOD

PROFILE ACHIEVED (mils)

Min Max Mean

SSPC-SP-10/NACE No. 2

SSPC-SP-12/NACE No. 5

SSPC-SP-3

SSPC-SP-11

SSPC-SP-11 (inaccessible area)

Brush-blasting (non-metallic substrate)

Abrasive Manufacturer and Sieve Size: _________________________________

Record measurements taken in the spaces provided below, to serve as permanent QA record. Maintain separate log for each location. When an area is divided into separate sections, maintain a separate log for each section.

Reading: _____ mils _____ mils _____ mils _____ mils _____ mils

Reading: _____ mils _____ mils _____ mils _____ mils _____ mils

Reading: _____ mils _____ mils _____ mils _____ mils _____ mils

Reading: _____ mils _____ mils _____ mils _____ mils _____ mils

Reading: _____ mils _____ mils _____ mils _____ mils _____ mils

Reading: _____ mils _____ mils _____ mils _____ mils _____ mils

Reading: _____ mils _____ mils _____ mils _____ mils _____ mils

Reading: _____ mils _____ mils _____ mils _____ mils _____ mils

Reading: _____ mils _____ mils _____ mils _____ mils _____ mils

Reading: _____ mils _____ mils _____ mils _____ mils _____ mils

Mean Mil Reading (IAW ASTM D4417-Method B) for above 10 readings (by column):

_____ mils _____ mils _____ mils _____ mils _____ mils

7 (Rev-0)

QA-4 - QUALITY ASSURANCE INSPECTION FORM

(SURFACE SOLUBLE SALT CONDUCTIVITY LOG)

SOLUBLE SALT CONDUCTIVITY MEASUREMENTS IAW SSPC-GUIDE 15

DATE TEST LOCATIONS

CONDUCTIVITY

(microsiemens/cm)

8 (Rev-0)

QA-5 - QUALITY ASSURANCE DATA FORM

(COATING THICKNESS)

(Use one sheet for each sequence)

Coating Mfg Product Name Batch # Induction

Time

Coating System Sequence

(Primer/Touchup/3rd Coat, etc.)

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

SPOT 1 2 3 4 5

AVERAGE

VALUE

*BASE METAL

READING (BMR)

*Required, If Magnetic Pull-Off (Type I/Banana) Gauge Is Used.

Location (Frame Reference): ___________________

SPOT 1 2 3 4 5

Overall Avg. DFT

ADJUSTMENTS

1 Avg. BMR Deviation

3 Before

Adjustments

After Adjustments

Avg.

Location (Frame Reference): ___________________

SPOT 1 2 3 4 5

Overall Avg. DFT

ADJUSTMENTS

1 Avg. BMR Deviation

3 Before

Adjustments

After Adjustments

Avg.

Location (Frame Reference): ___________________

SPOT 1 2 3 4 5

Overall Avg. DFT

ADJUSTMENTS

1 Avg. BMR Deviation

3 Before

Adjustments

After Adjustments

Avg.

Application Method (Airless, Conventional Spray, Rolled) Average DFT

9 (Rev-0)

24110_MWC_0809_110

REC_24110_110_110’ WPB ‘A’ Class (ALL) (0809)

WORK ITEM 1: Main Reduction Gear Assembly, Renew

1. SCOPE

1.1 Intent. This work item describes the requirements for the Contractor to renew the vessel's

Port main reduction gear assembly and associated flexible (flex) coupling.

1.2 Government-furnished property.

*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 or the C4ISR Service Center.

MTI ITEM DESCRIPTION NSN/PART NO. QTY

ESTIMATED

COST ($/UNIT)

Y Reduction gear assembly – ZF

Model BW 1500 NSN: 3010-99-741-9566 1 ea. 79,179.00

Y Flex coupling – American Vulkan NSN: 3010-99-735-6322 2 ea. 11,337.00

N Soft Patch Kit (Aft Half) - Shuster P/N: 110-SPKB 1 ea. 659.78

2. REFERENCES

COAST GUARD DRAWINGS

Coast Guard Drawing 110 WPB 241-001, Rev -, Reduction Gear Bolting & Chocking

Coast Guard Drawing 110 WPB 243-006, Rev C, Propulsion Shaft Details

COAST GUARD PUBLICATIONS

Surface Forces Logistics Center Standard Specification 0000 (SFLC Std Spec 0000), 2012, General Requirements

Surface Forces Logistics Center Standard Specification 6310 (SFLC Std Spec 6310), 2012, Requirements for Preservation of Ship Structures

Coast Guard Technical Publication (TP) 3094, Jan 2002, Manufacturer’s O&M

Instruction Book, Paxman Diesels Limited

Coast Guard Technical Publication (TP) 3095, Jul 2005, Manufacturer’s O&M

Instruction Book, Paxman Diesels Limited

Coast Guard Technical Publication (TP) 3096, Jan 2001, Main Diesel Engine and

Reduction Gear

Coast Guard Technical Publication (TP) 3495, May 2002, Duramax Shaft Seal System

Installation

10 (Rev-0)

OTHER REFERENCES

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

Component Adhesives

3. REQUIREMENTS

3.1 Interferences. The Contractor shall be aware that interferences in way of work include, but are not limited to the below-listed. Handle all interferences in accordance with SFLC Std Spec

0000, paragraph 3.3.5 (Interferences):

Flywheel guard.

Deck plates.

Work bench.

Shaft seal.

Piping.

Soft patch.

Ship’s Service Diesel Generator.

Main Diesel Engine exhaust piping.

3.2 Technical Representative. The Contractor shall provide the services of qualified Technical

Representative (Tech Rep), who is familiar with the Vulkan coupling, to accomplish the following tasks – on site:

Advise on manufacturer's proprietary information pertinent to the system.

Assist with proper repair methods, and ensure compliance with manufacturer's procedures and standards during disassembly, inspection, and reassembly of the system.

3.2.1 The Contractor shall ensure that the Tech Rep is a certified representative of American

Vulkan Corporation.

3.2.2 The Contractor shall submit the name of the Tech Rep to the COTR at the Arrival

Conference.

3.3 Removal. The Contractor shall accomplish the following in accordance with TP 3094, 3095 and 3096; and as shown on Coast Guard Drawings 110 WPB 241-001 and 110 WPB 243-006:

3.3.1 Disconnect and remove the flex coupling between the main engine and reduction gear assembly. Disconnect and separate the shaft coupling from the reduction gear coupling flange, and match-mark the coupling bolts from their respective holes.

WARNING!

During removal, extreme caution shall be taken to prevent damage to the shaft seal. DO

NOT rotate the shaft while the shaft boot is inflated. Damage-control plugs shall be readily available in the immediate area in case of flooding. Refer to TP 3495 for further guidance.

11 (Rev-0)

3.3.2 Remove the reduction gear assembly and existing chock material between the mounting flange and the support beams. Clean and prepare the surfaces for new chock material.

3.3.3 Turn over the removed reduction gear assembly and flex coupling to the Coast Guard

Property Administrator (PA) as an MTI item.

3.4 Installation. The Contractor shall accomplish the following in accordance with TP 3094, 3095 and 3096 and as shown on Coast Guard Drawings 110 WPB 241-001 and 110 WPB 243-

006.

3.4.1 Install the new government-furnished reduction gear assembly and flex coupling.

3.4.2 Match the reduction gear output coupling flange and the propulsion shaft coupling flange squarely by adjusting the leveling screws and side by side position of the reduction gear assembly.

The two coupling faces of the shaft/reduction gear assembly shall be parallel to such an extent that the maximum variation in distance between flanges at the outer edges shall not exceed the value listed in the referenced drawing.

Each coupling set shall also be concentric with each other within 0.001 inch.

3.4.3 Secure the shaft coupling to the reduction gear output flange with new bolting hardware.

After each bolt is completely threaded on to the shaft coupling, ensure that the first two exposed threads are covered with nonpermanent, sealing compound, conforming to ASTM D5363.

3.5 Chocking. Upon completion of alignment, the Contractor shall furnish and pour new resin chock material for the reduction gear assembly mounts in accordance with the procedures in

Coast Guard Drawing 110 WPB 241-001.

3.6 Alignment preparation. Prior to realignment, the Contractor shall ensure the following conditions are met for at least 24 hours before the alignment check:

The vessel is waterborne with fuel, water, and temporary ballast tanks filled to normal operating levels, a minimum of 95% capacity.

All major equipment and machinery weighing over 1,000 pounds (450 kilograms) are either installed or simulated by equivalent weights appropriately located.

3.7 Alignment. Proper engine to flex coupling / reduction gear alignment shall be performed as follows:

NOTE

If alignment is out of tolerance, physical symptoms such as excessive shipboard vibrations and/or abnormal noise must be present in order to support the measurements. Otherwise, no adjustments are necessary.

3.7.1 Alignment between coupling flanges. The Contractor shall check the engine to flex coupling / reduction gear alignment in accordance with TP 3094, 3095 and 3096. Submit CFR.

3.7.2 Parallel or bore alignment. Position the coupling flanges within 0.5" of each other and place a straight edge at the following points, Top/Bottom, and Outboard/Inboard. The bore or parallel misalignment shall not be greater than 0.005 inches. Submit CFR.

12 (Rev-0)

3.7.3 Angular or Face Alignment. Bring the coupling flanges forward to within 0.5" face gap at all points about the diameter of the flanges. Take measurements of face gap at four equally spaced positions on the flange diameters using feeler gauge. Compare diametrically opposite face gap readings top to bottom, and inboard to outboard. Subtract the smaller of diametrically opposite readings from the larger. The resulting difference is proportional to the amount of angular or face misalignment. These readings shall not exceed 0.0005 inches per inch of companion flange outside diameter. Submit CFR.

3.8 Documentation. The Contractor shall provide a written report of the final alignment tolerances achieved to the Coast Guard Inspector within 12 hours of completion.

3.9 Operational test. The Contractor shall witness an operational test (by Coast Guard personnel) to demonstrate proper operation of the main diesel engine(s) during sea trials. Inspect and correct any abnormal noise and vibration generated from the shaft or bearings.

3.10 Touch-up preservation. The Contractor shall prepare and touch-up coat all disturbed surfaces to match existing adjacent surfaces in accordance with SFLC Std Spec 6310, Appendix

B (Cutter and Boat Interior Painting Systems). Abide by all touch-up requirements outlined in paragraph 3.11.9 (Touch-ups and minor coating repairs)) of SFLC Std Spec 0000_STD.

4. NOTES

4.1 Machinery data.

4.1.1 Reduction gear assembly. Zahnradfabrik Friedrichshafen (ZF) Marine Reversing Gear -

Model BW 1500

4.1.2 Reduction gear coupling. American Vulkan Corporation – Model EZ195

4.1.3 Main diesel engine. Paxman Valenta – Model 16RP200M

13 (Rev-0)

24310_ENV_0312_110WPB

REC_24310_110’ WPB ‘A’ Class (ALL) (0112)

WORK ITEM 2: Propulsion Shafting, Remove, Inspect, and Reinstall

1. SCOPE

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

1.2 Government-furnished property.

MTI ITEM DESCRIPTION NSN/PN QTY

ESTIMATED

COST

($/UNIT)

N 4" Diameter x 28' Long, Aquamet-17 propulsion shaft

NSN: 2010-01-445-7940 2 ea. 8,700.00

N Oil Injection Equipment Kit N/A 1 set 6,000.00

*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 or the C4ISR Service Center.

2. REFERENCES

COAST GUARD DRAWINGS

Coast Guard Drawing 110 WPB 161-001, Rev A, Main Shaft Strut Details

Coast Guard Drawing 110 WPB 161-002, Rev -, Main Shaft Strut Installation

Coast Guard Drawing 110 WPB 161-003, Rev A, Intermediate Shaft Strut Details

Coast Guard Drawing 110 WPB 161-004, Rev -, Intermediate Shaft Strut Installation

Coast Guard Drawing 110C WPB 161-005, Rev F, Stern Tube Installation Details

Coast Guard Drawing 110 WPB 243-005, Rev -, Shaft Locking Device

Coast Guard Drawing 110 WPB 245-005, Rev -, Assembly of Oil Injection Equipment

Coast Guard Drawing 110 WPB 243-006, Rev C, Propulsion Shaft Details

COAST GUARD PUBLICATIONS

Surface Forces Logistics Center Standard Specification 6310 (SFLC Std Spec 6310), 2012, Requirements for Preservation of Ship Structures

Surface Forces Logistics Center Standard Specification 0000 (SFLC Std Spec 0000), Jan

2009, General Requirements

14 (Rev-0)

Surface Forces Logistics Center Standard Specification 0740 (SFLC Std Spec 0740), Jan

2009, Welding and Allied Processes

OTHER REFERENCES

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

Component Adhesives

3. REQUIREMENTS

3.1 General.

3.1.1 CIR. The Contractor shall submit a CIR for the following paragraph(s):

3.3 Shaft Inspections.

3.4 Forward bearing housing.

3.5 Main and intermediate strut bearing inspection.

3.6 Strut nuts and cotter pins.

3.7 Stern tube inspection.

3.1.2 Technical Representative.

Not applicable.

3.1.3 Protective measures.

Not applicable.

3.1.4 Interferences. The Contractor shall be aware that interferences in way of work include, but are not limited to the below-listed. Handle all interferences in accordance with SFLC Std Spec

0000, paragraph 3.3.5 (Interferences):

Shaft bearing carrier.

Deck plates.

Wiring.

Machinery.

Piping.

3.2 Removal. The Contractor shall remove both propeller shafts.

3.2.1 Mark the original propeller-to-shaft location and shaft-to-reduction gear coupling location as a baseline for reinstallation.

3.2.2 Mark the existing orientation of each shaft coupling and bearing prior to removal, indicating the top, starboard, port, and bottom (12 o’clock, 3 o’clock, 6 o’clock, and 9 o’clock) positions as a baseline for reinstallation.

3.2.3 Provide proper support to the reduction gear/propulsion shaft flange to prevent it from drooping and sagging.

15 (Rev-0)

3.2.4 Protect the shafts from damage during removal, storage, and reinstallation.

3.2.5 Ensure the shafts are properly supported at all bearing journals while being transported and stored.

3.3 Shaft inspections. The Contractor shall clean each shaft of all surface contaminants; set up the shafts in a lathe, and accomplish the below inspection.

3.3.1 Visual inspection. Visually inspect each propeller shaft, as shown on Coast Guard

Drawing 110 WPB 243-006, and all associated components including propeller nut, gear nut, locking fasteners, hydraulic nut assembly, and coupling, for evidence of corrosion, pitting, surface cracks, or other defects.

3.3.2 Measurements.

Measure the strut, intermediate and forward stern tube bearing journal diameters and runouts.

Before taking shaft runout readings, spin the shaft on a lathe for approximately two hours at 10 to 20% MAX rated speed to eliminate any sagging that may have occurred during handling and storage.

Measure and record the shaft straightness along the length of the shaft, starting at two-inches from the ends and measuring, at a minimum, two-places inside of each bearing station, and the mid-points between each bearing station. Compare the instantaneous TIR readings at each location to the maximum allowable TIR shown on Coast Guard Drawing 110 WPB 243-006 and provide a pass/fail determination.

NOTE

Allowable TIR is listed on Coast Guard shaft drawings and ‘varies’ with location along the shaft.

3.3.3 NDI. The Contractor shall perform NDI of both shafts in accordance with SFLC Std Spec

0740, Appendix C.

3.4 Forward bearing housing. The Contractor shall accomplish the following for each forward bearing housing:

3.4.1 Removal. Remove the shaft bearing housing from the stern tube. Before unbolting the shaft bearing housing, drill and ream two holes in the flanges where the bearing housing mounts to the stern tube. Insert Type 316 stainless steel tapered pins in the holes. Ensure that the holes are located to provide the same vertical and horizontal offset, as well as angularity that existed before the bearing housing was unbolted.

WARNING!

DO NOT drill new holes, if holes and taper pins already exist.

16 (Rev-0)

3.4.2 Bearing and bearing housing inspection. After removal, the Contractor shall clean and visually inspect all bearings and bearing housings for any corrosion or defects. Measure and record all bearing inside diameters at forward, aft, and middle positions. Remove the water injection threaded connection and perform a corrosion inspection of the cooling water port thru the housing, including the interior wall.

NOTE

The shaft bearing clearance shall not exceed 0.120" for 4" diameter shafts, otherwise condemn and renew the applicable bearing.

3.4.3 Bearing housing preservation. The Contractor shall preserve the forward bearing housing, using the system specified for “Bilges, Cofferdams, and Forepeaks, Steel, Option II” in SFLC Std

Spec 6310 in Appendix B (Cutter and Boat Interior Paint Systems). Select Light Gray (26373), as the top/finish coat color.

3.4.4 Reinstallation. Reinstall the bearing housing(s) and bearing(s) upon completion of housing inspection and preservation using seamless o-ring.

3.5 Main and intermediate strut bearing inspection. The Contractor shall accomplish the following:

Visually inspect the main and intermediate strut bearings for excessive wear and un-bonding.

Measure and record the bearing inside diameters at the forward, middle and aft positions across the vertical and horizontal planes.

Calculate the bearing clearance by subtracting the shaft bearing journal diameter from the bearing inside diameter readings.

NOTE

Example of CIR:

Bearing: 5.35-inches

Design: 5.48 to 5.52-inches

Determination: FAIL

Recommendation: RENEW

3.6 Strut nuts and cotter pins. The Contractor shall visually inspect all strut nuts and cotter pins for deterioration or defects. If a Change Request has been authorized and released by the KO, renew the designated strut nuts and cotter pins.

3.7 Stern tube inspection. The Contractor shall perform a visual inspection of all stern tube interior surfaces for corrosion and other defects.

3.8 Reinstallation. The Contractor shall reinstall both propeller shafts and all associated components to their original configuration as shown on the applicable drawings referenced in

Section 2. Be aware that the final positions of both shafts shall be at the original positions, unless shaft realignment has been authorized by the KO.

3.8.1 Reassemble the couplings in accordance with Coast Guard Drawing 110 WPB 245-005.

Attain a proper "draw" of 0.182" - 0.192".

17 (Rev-0)

3.8.2 Ensure that hydraulic pressure when expanding the coupling to fit the shaft is between

15,500 and 30,000 psig. Hydraulic nut pressure to press coupling on to the shaft is between 5,950 and 10,000 psig. Maintain pressure for a minimum of 30 minutes.

NOTE

If ambient air temperature is below 40 degrees Fahrenheit, allow double the time before releasing the hydraulic oil pressure from the hydraulic nut.

3.8.3 Reassemble the shaft locking devices as shown on Coast Guard Drawing 110 WPB 245-

005.

3.8.4 Secure each shaft coupling to the reduction gear output flange with new bolting hardware as shown on Coast Guard Drawing 110 WPB 243-006. After each bolt is completely threaded and properly torqued onto the shaft coupling, ensure that the first two exposed threads are covered with nonpermanent, sealing compound, conforming to ASTM D5363.

NOTE

Verify all bolting hardware dimensions on the referenced drawing utilizing existing hardware PRIOR TO the purchase of new hardware. Variances from the drawings are possible.

3.9 Shaft renewal option. The Contractor shall be aware that the Government reserves the right to furnish a new propeller shaft, at no additional cost to the government, to be installed in-place of a removed shaft. When the Government exercises this right, the Contractor shall accomplish the following tasks:

3.9.1 Rig the Government-furnished shaft from the delivery truck to a suitable inspection and repair facility. Remove all wrapping barrier material, and clean shaft surfaces of all preservative.

3.9.2 Perform the shaft inspections, as specified in paragraph 3.3 (Shaft inspections), with the exception of NDI.

3.9.3 Scrap the old shaft.

3.10 Operational test – post repairs. After completion of work, the Contractor shall witness an operational test (by Coast Guard personnel) of the propulsion shaft to prove satisfactory operating condition. Submit a CFR.

3.11 In-process quality control measures. The Contractor shall abide by all the safety, preservation, and quality control requirements specified in SFLC Std Spec 0000, paragraph

3.2.4.2 (In-process QC measures for “critical-coated surfaces).

NOTE

Surfaces being preserved are considered “critical-coated surfaces”.

4. NOTES

4.1 Typical misalignment symptoms. The following are some common shaft misalignment

18 (Rev-0) symptoms:

Excessive vibrations during normal operations.

Abnormal noises along the shaft line during normal operations.

Uneven bearing wear (it is normal for the 6 o’clock position of the bearing should have the most wear).

Wiped bearings.

19 (Rev-0)

24360_ENV_0112_110WPB

WORK ITEM 3: Mechanical Shaft Seal Assemblies, Overhaul

1. SCOPE

1.1 Intent. This work item describes the requirements for the Contractor to overhaul the mechanical shaft seal assembly on the port propeller shaft.

1.2 Government-furnished property.

MTI ITEM DESCRIPTION NSN/PN QTY ESTIMATED

COST

($/UNIT)

N Shaft seal assembly kit NSN: 5330-01-497-8095 2 ea. 859.48

N Shaft seal assembly NSN: 4320-01-497-8057 2 ea. 3,111.84

N Emergency Shaft Seal

Inflator Kit NSN: 5330-01-497-9866 2 ea. 175.00

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

2. REFERENCES

COAST GUARD DRAWINGS

Coast Guard Drawing 110C WPB 161-005, Rev F, Stern Tube Installation Details.

COAST GUARD PUBLICATIONS

Coast Guard Technical Publication (TP) 3495, May 2002, Chapter 243, Installation

Duramax Shaft Seal System

Surface Forces Logistics Center Standard Specification 0000 (SFLC Std Spec 0000), 2012, General Requirements

OTHER REFERENCES

None.

3. REQUIREMENTS

3.1 General.

3.1.1 CIR.

None.

20 (Rev-0)

3.1.2 Technical Representative.

Not applicable.

3.1.3 Protective measures.

Not applicable.

3.1.4 Interferences. The Contractor shall be aware that interferences in way of work include, but are not limited to the below-listed. Handle all interferences in accordance with SFLC Std Spec

0000, paragraph 3.3.5 (Interferences):

Deck plate.

Deck plate framing.

Propulsion shaft.

3.2 Seal overhaul particulars. The Contractor shall accomplish the following for port shaft seal assembly, using TP-3495 as a guide:

Disassemble and remove the shaft seal assembly and emergency shaft seal inflator system.

Clean all components free of marine growth.

Perform visual inspection of cleaned components. Submit CFR.

Renew all seal components with Government-furnished shaft seal assembly kit and emergency shaft seal inflator.

Renew shaft seal cooling flex hoses.

Reassemble and reinstall the seal assembly.

CAUTION!

Do not rotate shaft during overhaul tasks!

NOTE

The seal inflator adaptor is of universal length and will require adjustments.

3.2.1 The Contractor shall measure, cut, and fit the inflator adaptor to the length required to achieve a depth that passes into the center chamber of the inflator but not touch the inside wall of the interior diameter. The seal inflator adaptor end shall be rounded following the cutting to length to prevent rubbing/chaffing. When installed and the seal inflation cycled, the seal must return to a fully relaxed position with no visible bulging or protrusion in the seal inflator adaptor area.

3.2.2 Prior to installing the mechanical shaft seal assembly on the cutter, perform NDT testing of the newly installed shaft seal inflator. Install a 4-inch stub shaft into the emergency shaft seal of similar or better surface finish of the propulsion shaft. Inflate the emergency shaft seal inflator to the pressure called for in TP-3495 and visually inspect the seal to ensure that it inflates uniformly around the shaft and is not bulging or otherwise displaying signs of mechanical derangement or seal compromise. Leave the emergency shaft seal inflated with the stub shaft installed and submerge the system in water for 5-minutes. Inspect for signs of air leaks from the emergency

21 (Rev-0) shaft seal inflation tube or schraeder valve assembly. Remove the emergency shaft seal inflator and stub shaft from the water and orient the inflator with the mounting flange facing up. Fill the cavity between the stub shaft and seal housing with water up to the mounting flange. After 5-minutes have elapsed, inspect the water level in the seal housing for signs of leakage. No visible air or water leaks are permitted. Make repairs as necessary to obtain a leak free condition.

Submit a CFR.

3.2.3 After the propulsion shaft have been installed and coupled to the reduction gear output flanges, perform a clearance measurement between the propulsion shaft and the shaft seal adapter flange thru the emergency inflator boss across the vertical and horizontal planes. Compare the clearance measurements to the Duramax tolerances. Submit a CFR.

NOTE

Minor relocating of the shaft seal adapter flange within the mechanical limits of the pilot grooves is authorized to achieve the Duramax running clearance tolerances between the propulsion shaft to shaft seal adapter flange.

3.3 Government right to change out seal assembly. The Contractor shall be aware that the

Government reserves the right to furnish up to two new shaft seal assemblies in lieu of overhauling the seals, at no additional cost to the Government.

3.4 Seal venting. After launching the cutter and in the presence of the Coast Guard Inspector, the

Contractor shall remove the cooling water injection lines from both seals and allow the stern tube and seal assemblies to flood with water, in accordance with the manufacturer’s guidance in TP

3495. When the air is vented from the seal assemblies re-connect the injection lines.

WARNING

Do not rotate shaft until the stern tubes have been properly vented.

3.5 Operational test – post repairs. After completion of work, the Contractor shall witness an operational test (by Coast Guard personnel) of all items or shipboard devices that have been disturbed, used, repaired, altered, or installed, to prove that they are in satisfactory operating condition. Submit a CFR.

NOTE

Pay special attention to water leaks, abnormal noises, and any binding in normal shaft operation.

This section is not applicable to this work item.

22 (Rev-0)

24410_MWS_0716_110WPB

REC_24300_110’ WPB ‘A’ Class (ALL) (0412)

WORK ITEM 4: Propulsion Shaft Bearings (External), Renew

1. SCOPE

1.1 Intent. This work item describes the requirements for the Contractor to renew the strut shaft bearings (external) for the port propeller shaft.

1.2 Government-furnished property.

MTI ITEM DESCRIPTION NSN/PN QTY

ESTIMATED

COST

($/UNIT)

N Main Shaft Strut Bearing, Bronze and rubber cutlass bearing, 4" ID x 5" OD x 16” Long NSN: 3120-01-222-3927 2 ea. 200.00

N Intermediate Shaft Strut Bearing, Bronze and rubber cutlass bearing, 4" ID x 5" OD x 16” Long NSN: 3120-01-222-3927 2 ea. 200.00

2. REFERENCES

COAST GUARD DRAWINGS

Coast Guard Drawing 110 WPB 161-001, Rev A, Main Shaft Strut Details

Coast Guard Drawing 110 WPB 161-002, Rev-, Main Shaft Strut Installation

Coast Guard Drawing 110 WPB 161-003, Rev A, Intermediate Shaft Strut Details

Coast Guard Drawing 110 WPB 161-004, Rev -, Intermediate Shaft Strut Installation

Coast Guard Drawing 110 WPB 243-006, Rev C, Propulsion Shafting Details

COAST GUARD PUBLICATIONS

None.

OTHER REFERENCES

None.

3. REQUIREMENTS

3.1 General.

23 (Rev-0)

3.1.3 Protective measures.

Not applicable.

3.1.4 Interferences.

None.

3.2 Inspection of Government-furnished bearings. After receiving the Government-furnished bearings, the Contractor shall visually inspect the bearings for damage or defects, measure and record the bearing dimensions, and submit a CFR.

3.3 Bearing renewal. The Contractor shall accomplish the following, for each bearing.

Precautions shall be taken to not damage the bearing housing upon bearing removal. Using an air arc gouge rod often cuts away part of the housings and/or distorts the housing due to the excessive heat. The Contractor shall employ processes/methods that do not cause secondary damage to ship's structure.

3.3.1 Main shaft strut bearing. Remove and renew the main shaft strut bearing(s) with the

Government-furnished bearing(s) using Coast Guard Drawings 110 WPB 161-001 and 110 WPB

161-002 as reference.

3.3.2 Intermediate strut bearing. Remove and renew the intermediate strut bearing(s) with the

Government-furnished bearing(s) using Coast Guard Drawings 110 WPB 161-003 and 110 WPB

161-004 as reference.

3.3.3 Bearing housing inspection. After removing the bearing(s), clean and visually inspect the main and intermediate strut bearing housings’ bores for any corrosion and other defects. Measure and record all bearing housing inside diameters at forward, aft, and middle positions. Perform interference fit calculations to determine if the strut bore is within allowable tolerance to install the Government-furnished strut bearings. Submit a CFR.

3.4 Interference fit. The Contractor shall achieve an interference fit between the bearing and the strut tube of 0.001-inches to 0.002-inches. The Contractor is permitted to employ low temperatures to shrink fit the bearings during installation, but may not cool the bearings to lower than 0° Fahrenheit. The Contractor shall skim cut the outside diameter of the bearing to achieve the aforementioned interference fit.