C08.0 Attachment 1.3 SMS 5120-081-026 Rev H CHG-6.pdf

FOR OFFICIAL USE ONLY

SUBMEPP

MS NO. 5120-081-026 REV H CHG-6

SUBMARINE

MAINTENANCE

STANDARD

MR DESCRIPTION: Overhaul snorkel induction mast assembly.

DESTRUCTION NOTICE. Destroy by any method that will prevent disclosure of contents or reconstruction of the document.

SUBMEPPAPPROVAL

Hilary LeBreton

SYSTEM/COMPONENT ENGINEER/TECHNICIAN

Bryant Matthews 7/19/19

PROGRAM MANAGER DATE

DISTRIBUTION STATEMENT D. Distribution authorized to DOD and DOD contractors only (Administrative/Operational use). Other requests shall be referred to COMNAVSEASYSCOM or higher DOD authority.

Class: SSBN726

MS NO. 5120-081-026 REV H CHG-6 PAGE i

REVISIONS/CHANGES

REV DESCRIPTION APPROVAL & DATE

D The MRP was revised to:

1. Incorporate History Page i.

2. Update cracks criteria step.

3. Update induction mast pipe surfaces criteria steps.

4. Update induction mast fairing criteria step.

5. Update and add steps to reduce amount of rework on standpipe.

6. Update lubrication step grease criteria.

Bill Murphy Eric E. Blough

3/25/93

E The MRP was revised to:

1. Incorporate TRB UAC-1278-93 (clarified induction mast pipe straightness measurement steps).

2. Incorporate TRB UAC-1387-93 (corrected induction mast pipe surfaces criteria).

3. Incorporate TRB UAC-1405A-93 (added bearing assembly inspection and bearing shoe adjustment).

4. Incorporate TRB UAC-1475-93 (clarified V-ring static sealing surface criteria).

5. Incorporate SUBMEPP tech code comment (added 4 page DRF as new Attachment1).

Bill Murphy Eric E. Blough

6/6/94

F The MRP was revised to:

1. Incorporate TRK UAC-2043-95 (changed rubber seal, piece 14, from mandatory to contingency replacement part).

2. Incorporate TRK UAC-2044-95 (added clarification to requirement for measuring induction mast and standpipe straightness, and added procedure to measure standpipe straightness).

Bill Murphy Eric E. Blough

6/2/95

G The MS was revised to:

1. Incorporate TRB UACS 1067-96 (clarified major/minor repair testing requirements and added hydrostatic tightness test requirement and vacuum test requirement).

Bill Murphy Eric E. Blough

9/20/96

H The MS was revised to:

1. Incorporate SUBMEPP comments (added applicable steps of GAC as an attachment; revised relief valve test pressure settings; and added Notes 8 and 9).

Bill Murphy Scott E. Mercer

2/20/04

H CHG-1 CHG-1 consists of Cover Page, Page ii, Page 11 of 12, and Attachments 1 and 4, Page 2, 7, 13, and 19 of 19. The MS was changed to:

1. Incorporate TPR 728-ERO01-H048 (corrected test pressures).

Kerry Connors Scott E. Mercer

10/21/05

MS NO. 5120-081-026 REV H CHG-6 PAGE ii

REVISIONS/CHANGES

REV DESCRIPTION APPROVAL & DATE

2. Incorporate SUBMEPP comments (updated SUBMEPP’s address on the MCF Requirements form and updated GAC attachment to Revision H CHG-1 requirements).

H CHG-2 CHG-2 consists of Cover Page, Page ii, Pages 3, 4, 8, and 10 through 12 of 12, and Attachments 2 through 4, Pages 3 through 14 and 16 through 19 of

19. The MS was changed to:

1. Incorporate UACS TRB-11-050 (revised Figure 1; added inspection of fasteners, and revised MRPL of Attachment 2).

2. Incorporate SUBMEPP comments (clarified O-ring groove criteria, removed CAGE from MRPLs, and updated GAC attachment to Revision H CHG-4 requirements).

Kerry Connors Jim Rizas 5/10/12

H CHG-3 CHG-3 consists of Cover Page, Page iii, Pages 3 through 12 of 12, and Attachments 1 through 4, Pages 1 through 20 of 20. The MS was changed to:

1. Incorporate UACS PSNS-12-094 (modified induction mast fairing and standpipe straightness inspection criteria).

2. Incorporate UACS SUBMEP-12-095 (added caution alerting users to MS policy and applicability limitations MS No. 7650-081-010).

3. Incorporate SUBMEPP comments (clarified O-ring groove criteria and updated MRPLs in Attachments 2 and 3).

Kerry Connors Jim Rizas 7/26/12

H CHG-4 CHG-4 consists of Cover Page, Page iii, and Page 12 of 12. The MS was changed to:

1. Incorporate UACS TRK-13-002 (revised vacuum test requirements).

Kerry Connors Jim Rizas 4/24/13

H CHG-5 The MS was changed to:

1. Incorporate UACS PSNS-15-139 (modified standpipe inspection criteria).

2. Incorporate UACS TRK-14-071 (clarified test reference).

3. Incorporate SUBMEPP comments (updated GAC attachment to Revision H CHG-6 requirements and updated format to latest XML technology in preparation of future HTML output).

Hilary LeBreton Cynthia L. Waters

11/21/16

H CHG-6 The MS was changed to:

1. Incorporate UACS NNEWS-18-009 (modified induction mast fairing inspection criteria).

Hilary LeBreton Bryant Matthews

7/19/19

MS NO. 5120-081-026 REV H CHG-6 Page 1 of 10

MAINTENANCE STANDARD

EQUIPMENT/COMPONENT MS NO. 5120-081-026

Mast, Snorkel Induction

SYSTEM RELATED MAINTENANCE

Ventilation (VH) None

MR DESCRIPTION

1. Overhaul snorkel induction mast assembly.

ATTACHMENTS

1. Material Condition Feedback (MCF) Requirements

2. Equipment Guide List/Maintenance Requirement Parts List (APL 971000164)

3. Equipment Guide List/Maintenance Requirement Parts List (APL 971000176)

4. Applicable Steps of General Acceptance Criteria (GAC)

TECHNICAL REFERENCE DATA

(a) Induction Mast Assembly NAVSHIPS Drawing 501-4675660

(b) Induction Mast Assembly NAVSHIPS Drawing 501-6130289

(c) Procedure for Maintenance and Repair of the TRIDENT Snorkel Induction Mast System

NAVSEA 0900-LP-018-0090

(d) Gaskets and Packing NAVSEA S9086-CM-STM-020/CH-078

(e) Inspection, Repair, and Painting Fiberglass Mast Assemblies NAVSEA SE110-BK-MMO-010

(f) Procedure for Shipboard Installation of the TRIDENT Snorkel Induction Mast System

NAVSEA 0900-LP-018-0080

(g) Test Data Items Subject to Sea Pressure NAVSHIPS Drawing 845-4640418

(CONFIDENTIAL)

NOTE : Additional documentation and detailed part drawings that may be required for corrective maintenance are listed in the Maintenance Requirement Parts List.

SAFETY PRECAUTIONS

1. Observe standard safety precautions.

2. Avoid prolonged contact with, or inhalation of, cleaning solvents. Avoid use near heat or open flame and provide adequate ventilation.

3. Equip hydrostatic test pump with certified test gages and a relief valve. Set relief valve at nominal test pressure plus

10 percent, or plus 100 psig, whichever is less.

MS NO. 5120-081-026 REV H CHG-6 Page 2 of 10

BOUNDARIES

1. Boundaries of this MS are the snorkel induction mast assembly up to and including the hoist pipe, standpipe, fairing, closure cap, closure cap seals, and split flange but not including mast cylinder, mast cylinder base, head valve assembly, upper and lower bearing assemblies, transition piece, and electrical components.

MS NO. 5120-081-026 REV H CHG-6 Page 3 of 10

Preliminary

Figure 1. Snorkel Induction Mast Assembly

PROCEDURE

MS NO. 5120-081-026 REV H CHG-6 Page 4 of 10

CAUTION: Familiarity with the Maintenance Standard (MS) Program policy and applicability limitations identified in MS No. 7650-081-010 is required prior to use of this MS.

NOTE 1: In instances where design criteria (e.g., surface finishes, tolerances, etc.) conflict with the criteria of this MS, the criteria of this MS must govern.

a. Pre-overhaul test:

a.(1) Raise and lower induction mast a minimum of 3 times while checking for any evidence of binding, hesitation, or sticking; any evidence of binding, hesitation, or sticking requires pipe straightness measurements be accomplished in accordance with Step 1.c.(9) and Step 1.d.(9).

1. Overhaul snorkel induction mast assembly.

NOTE 2: All parts identified as M (mandatory) in the Maintenance Requirement Parts List must be replaced. Other parts that do not meet the acceptance criteria, as defined herein, may be either repaired to original design requirements, in accordance with approved procedures, or replaced, whichever is more economical. A clarification of the above requirement is that metal removal is allowed to bring unacceptable surface defects within the acceptable limits of this MS, provided the metal removal does not cause any dimensional or geometric requirements of this MS (or the original design, where the MS is silent) to be violated.

NOTE 3: Prior to disassembly, refer to Instructions for Material Condition Feedback (MCF) Requirements in Attachment 1.

NOTE 4: Matchmark parts as necessary to facilitate reassembly. Original assembly marks must not be removed.

NOTE 5: Figure 1 shows the snorkel induction mast assembly fully disassembled only to depict component relationships and is not intended to indicate the extent of disassembly required for overhaul. Induction mast fairing, piece 3, must not be removed unless required for corrective maintenance.

1.a. Disassemble snorkel induction mast assembly, to the extent necessary to permit inspections, using Reference

(a) for mast listed on Attachment 2, or Reference (b) for mast listed on Attachment 3, and Figure 1 as guides.

WARNING: Avoid prolonged contact with, or inhalation of, cleaning solvents. Avoid use near heat or open flame and provide adequate ventilation.

1.b. Clean all parts to the extent no foreign material is visible; maintain cleanliness in accordance with NAVSEA-approved procedures.

NOTE 6: After mast is removed from the ship, inspect bearing frame assemblies in accordance with Reference (c) Section 2.12.

NOTE 7: Piece numbers are from Attachment 2 and Attachment 3.

NOTE 8: Unless otherwise specified, surface finish and the size and spacing of surface defects may be estimated visually.

NOTE 9: Unless otherwise specified, rhr surface finish requirements apply only to surfaces surrounding acceptable defects and not to the defect areas themselves. Sharp or raised edges on acceptable defects are not acceptable.

1.c. Inspect induction mast pipe, piece 1:

PROCEDURE (Cont’d)

MS NO. 5120-081-026 REV H CHG-6 Page 5 of 10

Figure 2. Induction Mast Pipe

1.c.(1) Visible cracks are not acceptable.

1.c.(2) Mating machined surfaces must be free of nicks, burrs, and high spots.

1.c.(3) Threads must meet the requirements of Attachment 4 Step 1.e.(2).

1.c.(4) O-ring groove [1] must meet the requirements of Attachment 4 Step 1.a.(3) for a 1/4” nominal cross-section O-ring (with no backup rings).

1.c.(5) V-ring static sealing surface [2] must meet the requirements of Attachment 4 Step 1.h., except packing cavity width must not exceed 0.640”.

1.c.(6) Surfaces [3] must meet the following requirements:

1.c.(6)(a) Defects up to 0.040” long or 0.020” deep, with an average spacing of 3/8”, and a minimum spacing of 3/16”, are acceptable.

1.c.(6)(b) Acceptable defects must be free of sharp or raised edges.

1.c.(6)(c) Surface finish, except for acceptable defects, must be rhr 125 or smoother.

1.c.(7) O-ring mating sealing surface [4] must meet the requirements of Attachment 4 Step 1.a.(3) for a 1/8” nominal cross-section O-ring.

1.c.(8) Wall thickness must not be less than 0.963”.

NOTE 10: Accomplishment of Step 1.c.(9) is required only if work has been accomplished which could affect the induction mast pipe, piece 1, straightness (i.e., welding, accidental damage, etc.), problems have been reported by ship’s force, or evidence of improper operation were found during completion of Step a.(1).

1.c.(9) Measure induction mast pipe straightness:

MS NO. 5120-081-026 REV H CHG-6 Page 6 of 10

NOTE 11: Due to the size, weight, and irregular shape of the induction mast pipe, piece 1, and attached fairing, rotation during straightness testing is not recommended. The following procedure does not rotate the pipe.

1.c.(9)(a) Support the pipe, at quarter points, in an approximately level horizontal position with the fairing

up. Use large “V” blocks with suitable spaces to raise the height approximately 4 feet from a solid floor.

1.c.(9)(b) Set up alignment scope 36” to 48” from bottom end of mast. Set the scope micrometers exactly at 0 and do not move until ready to take readings. Obtain a suitable tooling scale and holder to use as a target.

1.c.(9)(c) Using pencil or felt pen, and starting with 0° at the forward edge, mark the bottom clockwise at 0°, 90°, 180°, and 270°.

1.c.(9)(d) Place the target, alternately, within 1 foot of the top and 1 foot of the bottom of the pipe at the 0° quadrant and align scope. Repeat until exact alignment is attained.

1.c.(9)(e) When exact telescope alignment is achieved, place the target 3” from the bottom. Take and record readings using a vertical micrometer. Assign a minus (-) if the micrometer reading is red, indicating a rise. Assign a plus (+) if the micrometer reading is black, indicating a dip. Repeat recording of readings in 1 foot increments from bottom to a distance of 13’ 4” along the length of 0° quadrant. The pipe must be straight within 0.040” from bottom to a distance of 13’ 4” along the length.

NOTE 12: TRIDENT Refit Facility (Bangor) uses a sliding fixture that holds the target against the bore at desired locations; since pipe is non-magnetic, magnetic target holder cannot be used.

1.c.(9)(f) Repeat Step 1.c.(9)(d) and Step 1.c.(9)(e) for the 3 remaining quadrants, using a suitable fixture to hold target in place without rotating pipe.

1.c.(10) Induction mast fairing, piece 3:

1.c.(10)(a) Pits, cracks, or gouges, particularly in bearing shoe seating area, are not acceptable; fill in damaged areas with epoxy, and fair in with surrounding surfaces.

1.c.(10)(b) Measure after bearing area straightness in 3 places; after bearing area must be straight within 0.040” tir:

1.c.(10)(b){1} along trailing edge, 1.c.(10)(b){2} along port side of trailing edge, and 1.c.(10)(b){3} along starboard side of trailing edge.

1.c.(11) Valve body, piece 1-4:

1.c.(11)(a) Visible cracks are not acceptable.

1.c.(11)(b) Mating machined surfaces must be free of nicks, burrs, and high spots.

1.c.(11)(c) Threads must meet the requirements of Attachment 4 Step 1.e.(2).

1.c.(11)(d) Valve needle seating surface must be free of defects which form a leakage path.

1.c.(11)(e) Drilled grease passage must be free of obstructions.

1.d. Inspect standpipe, piece 2:

MS NO. 5120-081-026 REV H CHG-6 Page 7 of 10

Figure 3. Standpipe

1.d.(1) Visible cracks are not acceptable.

1.d.(2) Mating machined surfaces must be free of nicks, burrs, and high spots.

1.d.(3) O-ring groove [1] must meet the requirements of Attachment 4 Step 1.a.(1) for a 1/4” nominal cross-section O-ring (with no backup rings).

1.d.(4) Threads must meet the requirements of Attachment 4 Step 1.e.(2).

1.d.(5) Surface [2] finish must be rhr 125 or smoother.

1.d.(6) V-ring sealing surface [3] must meet the requirements of Attachment 4 Step 1.h. for a dynamic sealing surface, except packing cavity width must not exceed 0.640”. Diametral clearance between surface [3] and gland, piece 7, must not exceed 0.025”.

1.d.(7) V-ring sealing surface [4] must meet the requirements of Step 1.d.(6), with the following additions:

1.d.(7)(a) Visible axial defects of 0.010” maximum width or depth, and 0.020” maximum length, and minimum average spacing of 1/8” are acceptable.

1.d.(8) Wall thickness must meet the requirements of Attachment 4 Step 1.g.(1).

NOTE 13: Accomplishment of Step 1.d.(9) is required only if work has been accomplished which could affect the standpipe, piece 2, straightness (i.e., welding, accidental damage, etc.), problems have been reported by ship’s force, or evidence of improper operation were found during completion of Step a.(1).

1.d.(9) Measure standpipe straightness:

1.d.(9)(a) Place standpipe on a stable bench; position “V” blocks, as necessary, to obtain horizontal alignment.

1.d.(9)(b) Set up alignment scope 36” to 48” from bottom end of mast; level scope.

1.d.(9)(c) Using pencil or felt pen, make reference marks on both ends at corresponding 0°, 45°, 90°, and

135° quadrants.

1.d.(9)(d) Stretch nylon line from quadrant being checked, across bore, to matching quadrant; clamp at both ends, using a cushioned clamp.

1.d.(9)(e) Keeping vertical centerline of target aligned with stretched line, position target fixture 1 foot in from bottom end of mast; align scope.

MS NO. 5120-081-026 REV H CHG-6 Page 8 of 10

1.d.(9)(f) Maintaining target vertical alignment with stretched line, move target to within 1 foot of opposite end of mast; check alignment.

1.d.(9)(g) Repeat Step 1.d.(9)(e) and Step 1.d.(9)(f), as necessary, to achieve alignment.

1.d.(9)(h) Starting 3” from bottom end of mast, move target in 1 foot increments to determine straightness;

standpipe must be straight within 0.040” tir.

1.d.(9)(i) Rotate standpipe and repeat Step 1.d.(9)(d) through Step 1.d.(9)(h) for the 3 remaining quadrants.

1.e. Inspect access cover, piece 4:

1.e.(1) Visible cracks or exposed fibers are not acceptable.

1.e.(2) Elongated screw holes are not acceptable.

1.f. Inspect lantern ring, piece 6:

1.f.(1) Visible cracks or bends are not acceptable.

1.f.(2) Threads must meet the requirements of Attachment 4 Step 1.e.(2).

1.f.(3) Drilled holes must be free of obstructions.

1.f.(4) Surfaces in contact with V-ring packing must meet the requirements of Attachment 4 Step 1.h.(2).

1.g. Inspect gland, piece 7:

Figure 4. Gland

1.g.(1) Visible cracks or bends are not acceptable.

1.g.(2) O-ring groove [1] must meet the requirements of Attachment 4 Step 1.a.(3) for a 1/8” nominal cross-section O-ring (with no backup rings).

1.g.(3) O-ring mating sealing surface [2] must meet the requirements of Attachment 4 Step 1.a.(1) for a 3/16” nominal cross-section O-ring.

1.g.(4) O-ring mating sealing surface [3] must meet the requirements of Attachment 4 Step 1.a.(4) for a 0.078” cross-section O-ring.

1.g.(5) Threads must meet the requirements of Attachment 4 Step 1.e.(2).

1.g.(6) Drilled passages must be clean and free of obstructions.

1.g.(7) Surface [4] finish must be rhr 63 or smoother.

1.g.(8) Surfaces [4] and [5] must meet the requirements of Attachment 4 Step 1.h., except diametral clearance between surface [4] and standpipe, piece 2, must not exceed 0.025”.

1.g.(9) Surfaces [5] and [6] finish must be rhr 125 or smoother.

1.g.(10) Mating machined surfaces must be free of nicks, burrs, and high spots.

MS NO. 5120-081-026 REV H CHG-6 Page 9 of 10

1.h. Inspect shock collar, piece 10:

1.h.(1) Visible cracks are not acceptable.

1.h.(2) Mating machined surfaces must be free of nicks, burrs, and high spots.

1.h.(3) Cracked or bent cable support is not acceptable.

1.h.(4) Elongated bolt holes are not acceptable.

1.i. Inspect closure cap, piece 19:

1.i.(1) Visible cracks, delamination of fiberglass, or missing epoxy filler is not acceptable.

1.i.(2) Flaking, peeling, or missing paint is not acceptable.

1.i.(3) Inspect vibration dampening tile, piece 6, and cover, piece 7. Loose, cracked, or missing tile is not acceptable.

1.i.(4) Inspect rubber seal, piece 14. Nicks, cuts, tears, or missing seal is not acceptable.

1.j. Inspect plug, piece 53:

1.j.(1) Threads and flats must meet the requirements of Attachment 4 Step 1.e.(2).

1.j.(2) O-ring mating sealing surface must meet the requirements of Attachment 4 Step 1.a.(4) for a 0.078” cross-section O-ring.

1.k. Inspect continuous thread rod (stud), piece 4; capscrew, pieces 8 and 18; self-locking capscrew, pieces 4, 13, 17, 37, and 44; self-locking nuts, pieces 5, 15, and 19; nuts, piece 9; and machine screw, piece 14:

1.k.(1) Threads and flats must meet the requirements of Attachment 4 Step 1.e.(2).

1.l. Reassembly:

1.l.(1) Use M (mandatory) replacement parts identified in the Maintenance Requirement Parts List.

1.l.(2) Reassemble snorkel induction mast assembly using Reference (a) for mast listed on Attachment 2, or

Reference (b) for mast listed on Attachment 3, and Figure 1 as guides, except do not install gland capscrews, plug, piece 53, or O-ring, piece 54.

NOTE 14: Standard split ring chevron packing is an acceptable substitute for vee-dam packing, piece 47.

1.l.(3) If vee-dam packing, piece 47, is used, install packing in accordance with Reference (a) Note 25 or Reference (b), as applicable.

1.l.(4) If standard split ring chevron packing is used in place of vee-dam packing, piece 47, install packing in accordance with Reference (d) Paragraph 078-4.40.

1.l.(5) Lubricate vee-dam packing, piece 47, or standard split ring chevron packing, as applicable, using grease per CID A-A-50433 (Termalene No. 2).

1.l.(6) Paint induction mast fairing, piece 3, in accordance with Reference (e).

1.l.(7) Fore-and-aft bearing surface dimensions must not vary from the mean by more than 0.025” throughout the entire length of the snorkel induction mast assembly.

NOTE 15: During installation of induction mast, install and adjust bearing shoes in accordance with Reference (f) Section 2.4.

NOTE 16: When major repairs (as defined by Attachment 4) have been accomplished, perform Step 1.m. When minor repairs (as defined by Attachment 4) have been accomplished, omit Step 1.m.

MS NO. 5120-081-026 REV H CHG-6 Page 10 of 10

1.m. Hydrostatic elevated test (major repair/H-pressure):

WARNING: Equip hydrostatic test pump with certified test gages and a relief valve. Set relief valve at nominal test pressure plus 10 percent, or plus 100 psig, whichever is less.

1.m.(1) Using the test fixture Section 10-A identified in Note 25-7 of Reference (a) or Reference (b), as applicable, and using fresh water as a test medium, pressurize induction mast packing gland to item 11 (item 11 to item 11 plus 2 percent) of Reference (g). Maintain test pressure for at least 10 minutes.

1.m.(2) Inspect for leakage and distortion; leakage or distortion is not acceptable.

1.m.(3) Depressurize packing gland and remove test fixture; install gland capscrews, plug, piece 53, and O-ring, piece 54.

1.n. Hydrostatic tightness test (minor repair/J-pressure):

WARNING: Equip hydrostatic test pump with certified test gages and a relief valve. Set relief valve at nominal test pressure plus 10 percent, or plus 100 psig, whichever is less.

1.n.(1) Using the test fixture Section 10-A identified in Note 25-7 of Reference (a) or Reference (b), as applicable, and using fresh water as a test medium, pressurize induction mast packing gland to item 1 (item 1 to item 1 plus 2 percent) of Reference (g). Maintain test pressure for at least 10 minutes.

1.n.(2) Inspect for leakage and distortion; leakage or distortion is not acceptable.

1.n.(3) Depressurize packing gland and remove test fixture; install gland capscrews, plug, piece 53, and O-ring, piece 54.

1.o. Vacuum test:

NOTE 17: Induction mast and head valve (VH-8) must be installed shipboard in order to perform vacuum test.

1.o.(1) Evacuate induction mast and outboard piping from head valve (VH-8) to hull valve (VH-2) to 20 (17 to

23) inches of mercury; hold vacuum for a minimum of 120 minutes.

1.o.(2) Inspect for vacuum drop. No allowable vacuum drop in 120 minutes as corrected for temperature.

MS NO. 5120-081-026 REV H CHG-6 Page 1 of 19

Material Condition Feedback (MCF) Requirements

Instructions

(1) Observe the general condition of all parts during disassembly for extreme area of wear or deterioration, breakage, or unusual conditions which might affect performance.

(2) Observations are to be performed prior to scrapping parts (if they are to be replaced) and prior to performing any work or mechanical cleaning which would modify the “as-disassembled” condition.

(3) Record specific piece/part condition(s) and related failure mechanisms (e.g., bent, cracked, scored, corroded, or eroded, etc.).

(4) Record in the “Other” section of the Material Condition Feedback Form any unsatisfactory findings that were not specifically inspected for in the Maintenance Standard.

(5) The Material Condition section of Attachment 1 must be completed, however, to reduce paperwork, you are encouraged to attach copies of work center or shop produced forms and records in lieu of completing the applicable sections of Attachment 1 (e.g., TGI, Mechanical Component Record, Shop Test Record, etc.), provided they meet the requirements of “as-found condition” and/or “corrective action” information.

Attachment 1

MS NO. 5120-081-026 REV H CHG-6 Page 2 of 19

MATERIAL CONDITION FEEDBACK (MCF)

REQUIREMENTS

SEND

INFORMA-

TION

TO:

SUBMEPP ACTIVITY CODE 1810

P.O. BOX 2500

PORTSMOUTH NAVAL SHIPYARD

PORTSMOUTH NH 03804-2500

HULL: ___________ AVAIL: _____________

COMPONENT: ________________________

Ser.# (TRIPER/AERP): _________________

SWLIN/SSI: __________________________________

SWLIN PARA#/MRN: __________________________

Job Order (JCN, TGI): __________________________

FGC/HSC: ___________________________________

MATERIAL CONDITION CIRCLE RATING

Maintenance could have been delayed. - All non-consumable parts/areas met MS acceptance criteria: (e.g., machining/welding/cleaning to improve ground readings/etc. or part replacement was not required).

A

Maintenance was necessary at this time. - One or more parts/areas were degraded slightly beyond the specified MS criteria: (e.g., minor machining/welding/cleaning to improve readings/ etc. was required).

B

Maintenance should have been done sooner. - One or more parts/areas were degraded substantially beyond the specified MS criteria: (e.g., replacement or major machining/welding/ cleaning to improve ground readings/etc. was required).

C

ACTION TAKEN

Was component in operating condition before being worked? □ Yes □ No □ Unknown

List MANDATORY parts (other than software) that appeared to be in excellent condition and did not need to be replaced.

Part Name Pc No. Rationale

List CONTINGENCY parts that did not meet acceptance criteria, described as-found condition and corrective action, or attach a copy of any other paperwork that provides this information (e.g., TGI, Mechanical Component Record, Shop Test Record, etc.).

Part Name Pc No. As-Found Condition/Corrective Action

Other: (Supplemental comments on condition of component or work done to this component, e.g., entire component or unit replaced)

(Attach additional sheet/information if needed)

Mechanic/Point of Contact Date

Attachment 1

MS NO. 5120-081-026 REV H CHG-6 Page 3 of 19

Equipment Guide List and Maintenance Requirement Parts List

EQUIPMENT GUIDE LIST

IDENTIFICATION NO. APL

Snorkel Induction Mast T971000164

MAINTENANCE REQUIREMENT PARTS LIST

DRAWING NO. NAVSHIPS dwg 501-4675660 Rev L

DESCRIPTION PIECE NO. QTY PART NO. 1M/C/S/I

O-ring 45 1 M83248/1-471 M

Lubrication fitting 46 1 62-28-0621 M 2Vee-dam packing 47 1 54-50-4990 M

O-ring 48 1 54-60-0849 M

O-ring 54 1 M83248/2-906 M

Self-locking capscrew 17 2 60-02-2744 C

Capscrew 18 18 60-01-4054 C

Self-locking nut 19 18 MS17828-16C C

Self-locking capscrew 37 24 501-4675660 item 37 C

Self-locking capscrew 44 14 501-4675660 item 44 C

Plug 53 1 14-01-7336 C

Capscrew 52 14 60-02-0263 S

Packing 55 1 501-4675660 item 55 S

Packing 56 1 501-4675660 item 56 S

DRAWING NO. NAVSHIPS dwg 501-4675662 Rev H

DESCRIPTION PIECE NO. QTY PART NO. 1M/C/S/I

Valve stem 12 1 501-4675662 item 12 M Split shim 17 1 501-4675662 item 17 M

Backup ring 19 1 501-4675662 item 19 M

Bearing 20 3 501-4675662 item 20 M

Induction mast pipe 1 1 4675662-0001 C

FOR OFFICIAL USE ONLY

Attachment 2

1. Mandatory/Contingency/Special Tool/Informational

2. Standard split ring chevron packing is an acceptable substitute for vee-dam packing, piece 47, LAR response TRF-069- -88 applies.

MS NO. 5120-081-026 REV H CHG-6 Page 4 of 19

MAINTENANCE REQUIREMENT PARTS LIST (Cont'd)

DRAWING NO. NAVSHIPS dwg 501-4675662 Rev H (Cont'd)

DESCRIPTION PIECE NO. QTY PART NO. 3M/C/S/I

Valve body 1-4 1 501-4675662 item 1-4 C

Standpipe 2 1 4675662-0002 C

Induction mast fairing 3 1 4675662-0003 C

Access cover 4 1 4675662-0004 C Lantern ring 6 1 4675662-0006 C

Gland 7 1 4675662-0007 C Shock collar 10 1 4675662-0010 C Self-locking capscrew 13 162 4675662-0013 C

Machine screw 14 8 4675662-0014 C Self-locking nut 15 8 4675662-0015 C

Split support ring 18 1 501-4675662 item 18 S

DRAWING NO. NAVSHIPS dwg 501-4675663 Rev F

DESCRIPTION PIECE NO. QTY PART NO. 3M/C/S/I

Self-locking capscrew 4 18 501-4675663 item 4 C

Vibration dampening tile 6 12 501-4675663 item 6 C

Capscrew 8 12 501-4675663 item 8 C

Self-locking nut 9 12 501-4675663 item 9 C

Rubber seal 14 1 501-4675663 item 14 C Closure cap 19 1 501-4675663 item 19 C

DRAWING NO. NAVSHIPS dwg 501-4675664 Rev F

DESCRIPTION PIECE NO. QTY PART NO. 3M/C/S/I

Continuous thread rod (stud) 4 18 4675664-0004 C

Self-locking nut 5 18 4675664-0005 C

FOR OFFICIAL USE ONLY

Attachment 2

3. Mandatory/Contingency/Special Tool/Informational

MS NO. 5120-081-026 REV H CHG-6 Page 5 of 19

Equipment Guide List and Maintenance Requirement Parts List

EQUIPMENT GUIDE LIST

IDENTIFICATION NO. APL

Snorkel Induction Mast T971000176

MAINTENANCE REQUIREMENT PARTS LIST

DRAWING NO. NAVSHIPS dwg 501-6130289 Rev C

DESCRIPTION PIECE NO. QTY PART NO. 1M/C/S/I

Lubrication fitting 46 1 62-38-0621 M 2Vee-dam packing 47 1 54-50-4990 M

O-ring 54 1 M83248/2-906 M

Self-locking capscrew 37 24 501-6130289 item 37 C

Self-locking capscrew 44 14 501-6130289 item 44 C

Plug 53 1 14-01-7336 C

Capscrew 52 14 60-02-0263 S

Packing 55 1 501-6130289 item 55 S

Packing 56 1 501-6130289 item 56 S

DRAWING NO. NAVSHIPS dwg 501-4675662 Rev H

DESCRIPTION PIECE NO. QTY PART NO. 1M/C/S/I

Valve stem 12 1 501-4675662 item 12 M Split shim 17 1 501-4675662 item 17 M

Backup ring 19 1 501-4675662 item 19 M

Bearing 20 3 501-4675662 item 20 M

Induction mast pipe 1 1 4675662-0001 C

Valve body 1-4 1 501-4675662 item 1-4 C

Standpipe 2 1 4675662-0002 C

Induction mast fairing 3 1 4675662-0003 C

Access cover 4 1 4675662-0004 C Lantern ring 6 1 4675662-0006 C

Gland 7 1 4675662-0007 C

FOR OFFICIAL USE ONLY

Attachment 3

1. Mandatory/Contingency/Special Tool/Informational

2. Standard split ring chevron packing is an acceptable substitute for vee-dam packing, piece 47, LAR response TRF-069- -88 applies.

MS NO. 5120-081-026 REV H CHG-6 Page 6 of 19

MAINTENANCE REQUIREMENT PARTS LIST (Cont'd)

DRAWING NO. NAVSHIPS dwg 501-4675662 Rev H (Cont'd)

DESCRIPTION PIECE NO. QTY PART NO. 3M/C/S/I

Shock collar 10 1 4675662-0010 C Self-locking capscrew 13 162 4675662-0013 C

Machine screw 14 8 4675662-0014 C Self-locking nut 15 8 4675662-0015 C

Split support ring 18 1 501-4675662 item 18 S

DRAWING NO. NAVSHIPS dwg 501-4675663 Rev F

DESCRIPTION PIECE NO. QTY PART NO. 3M/C/S/I

Self-locking capscrew 4 18 501-4675663 item 4 C

Vibration dampening tile 6 12 501-4675663 item 6 C

Capscrew 8 12 501-4675663 item 8 C

Self-locking nut 9 12 501-4675663 item 9 C

Rubber seal 14 1 501-4675663 item 14 C Closure cap 19 1 501-4675663 item 19 C

FOR OFFICIAL USE ONLY

Attachment 3

3. Mandatory/Contingency/Special Tool/Informational

MS NO. 5120-081-026 REV H CHG-6 Page 7 of 19

Applicable Steps of General Acceptance Criteria (GAC)

NOTE : This attachment contains only those steps from MS No. 7650-081-001H CHG-6, General Acceptance Criteria, that are necessary to accomplish the inspections required by this MS. A list of definitions is located at the end of this attachment.

1. General acceptance criteria

1.a. O-ring grooves and mating sealing surfaces:

NOTE 1: Unless otherwise specified, surface finish and the size and spacing of surface defects may be estimated visually.

NOTE 2: Unless otherwise specified, rhr surface finish requirements apply only to surfaces surrounding acceptable defects and not to the defect areas themselves. Sharp or raised edges on acceptable defects are not acceptable.

NOTE 3: Hair-like visible defects with width and depth of 0.001” or less are acceptable regardless of length or location.

NOTE 4: Diametral clearance, gland depth, and groove width and depth requirements apply to surfaces surrounding acceptable surface defects and not to the surface defect areas themselves.

NOTE 5: Acceptance criteria in this section applies to O-ring grooves designed to MIL-P-5514E (revised), MIL-G-5514G (not for new design), SAE-AS4716, and SAE-AS5857. For O-ring grooves not manufactured to these specifications, or grooves formed by several mating parts, or where mating parts are not available for measurement, only surface defect and finish requirements apply. Diametral clearance, groove width, and gland depth require engineering evaluation.

NOTE 6: Any metal removal must be held to the minimum necessary to meet acceptance criteria.

NOTE 7: Where original design drawing allowances exceed criteria specified in this section, the maximum allowed on the drawing applies.

NOTE 8: For static radial seals, and static face seals, measurement of diametral clearance, gland depth, groove width, and depth to meet the requirements of Table 1 and Table 3 is required only when surfaces are reworked to eliminate unacceptable defects.

NOTE 9: For dynamic radial seals, measurement of groove width to meet the requirements of Table 2 is required only when surfaces are reworked to eliminate unacceptable defects. The diametral clearance and gland depth must always be measured to meet the requirements of Table 2.

NOTE 10: Surfaces in contact with backup ring(s) are considered non-sealing surfaces. Non-sealing surface defect criteria applies.

NOTE 11: A dynamic sealing surface may be evaluated as static sealing surface if it meets the exception criteria as defined in the Definitions provided at the end of this document.

Attachment 4

MS NO. 5120-081-026 REV H CHG-6 Page 8 of 19

1.a.(1) Static radial seals (See Note 1 through Note 8 and Note 10):

Figure 1. Static Radial Seals

1.a.(1)(a) O-ring groove [1] and mating sealing surface [2] must meet the requirements of Table 1.

1.a.(1)(b) O-ring groove sealing surface [1] finish, except for surface defects accepted by Table 1, must be rhr 125 or smoother.

1.a.(1)(c) Mating sealing surface [2] finish, except for surface defects accepted by Table 1, must be rhr 125 or smoother.

1.a.(1)(d) Raised or sharp edges of acceptable surface defects on O-ring groove [1] and mating sealing surface [2] are not acceptable.

1.a.(1)(e) If groove is repaired, groove face angle (dimension H) must not exceed 5° maximum.

1.a.(1)(f) O-ring groove non-sealing surface defects must not exceed 0.060” in length or 0.030” in depth; average defect spacing must not be less than 1/8”. General corrosion on non-sealing surfaces to a maximum depth of 0.001” is acceptable;

all evidence of corrosion products must be removed, without exceeding O-ring groove requirements of Table 1.

MS NO. 5120-081-026 REV H CHG-6 Page 9 of 19

Table 1. Static Radial Seals

Decimal O-ring Cross- Section

Nominal O-ring Cross- Section

Maximum Surface Defect Size

Minimum Surface Defect Spacing

Max Diametral Clearance

C**

Max Gland Depth

D*

Max Groove Width, G

Width or Length Depth Avg Min

No Backup Rings

One Backup Ring

Two Backup Rings

0.070 1/16 0.004 0.002 3/64 1/64 0.006 0.059 0.106 0.161 0.219

0.103 3/32 0.006 0.003 1/16 1/32 0.008 0.092 0.154 0.196 0.258

0.139 1/8 0.008 0.004 3/32 1/32 0.009 0.125 0.202 0.249 0.318

0.210 3/16 0.012 0.008 1/8 3/64 0.009 0.189 0.297 0.350 0.440

0.275 1/4 0.015 0.010 5/32 1/16 0.012 0.245 0.392 0.492 0.596

All dimensions are in inches.

* Maximum gland depth equals B(Max) - A(Min) or E(Max) - F(Min)

2 2 ** Maximum diametral clearance equals E(Max) - A(Min) or C1 + C2

1.a.(3) Static face seals (See Note 1 through Note 8):

Figure 3. Static Face Seal

1.a.(3)(a) O-ring groove [1] and mating sealing surface [2] must meet the requirements of Table 3.

1.a.(3)(b) O-ring groove sealing surface [1] and mating sealing surface [2] finishes, except for surface defects accepted by Table 3, must be rhr 125 or smoother.

1.a.(3)(c) Raised or sharp edges of acceptable surface defects on O-ring groove [1] and mating sealing surface [2] are not acceptable.

MS NO. 5120-081-026 REV H CHG-6 Page 10 of 19

1.a.(3)(d) If groove is repaired, groove face angle (dimension H) must not exceed 5° maximum.

1.a.(3)(e) O-ring groove non-sealing surface defects must not exceed 0.060” in length or 0.030” in depth; average defect spacing must not be less than 1/8”. General corrosion on non-sealing surfaces to a maximum depth of 0.001” is acceptable;

all evidence of corrosion products must be removed, without exceeding O-ring groove requirements of Table 3.

Table 3. Static Face Seals

Decimal O-ring Cross- Section

Nominal O-ring Cross- Section

Maximum Surface Defect Size

Minimum Surface Defect

Spacing

Max Groove Depth

J

Min Groove Depth*

J

Max Groove Width

GWidth or Length Depth Avg Min

0.070 1/16 0.004 0.002 3/64 1/64 0.058 0.050 0.106

0.103 3/32 0.006 0.003 1/16 1/32 0.091 0.074 0.154

0.139 1/8 0.008 0.004 3/32 1/32 0.124 0.101 0.202

0.210 3/16 0.012 0.008 1/8 3/64 0.188 0.152 0.297

0.275 1/4 0.015 0.010 5/32 1/16 0.242 0.201 0.392

All dimensions are in inches.

* Drawing requirements apply if minimum groove depth is less than specified in Table 3.

1.a.(4) Straight thread tube fitting boss seals (applies to both AN and MS type seals; see Note 1 through Note 7):

Figure 4. Straight Thread Tube Fitting Boss Seal

1.a.(4)(a) Sealing surfaces [1], except threads, must meet the requirements of Table 4.

1.a.(4)(b) Sealing surfaces [1] finish, except for surface defects accepted by Table 4, must be rhr 125 or smoother.

1.a.(4)(c) Raised or sharp edges of acceptable surface defects on sealing surfaces [1] are not acceptable.

MS NO. 5120-081-026 REV H CHG-6 Page 11 of 19

Table 4. Straight Thread Tube Fitting Boss Seal

AS 568

Uniform Dash No.

O-ring Cross- Section

Maximum Surface Defect Size

Minimum Surface Defect Spacing

Width or Length Depth Avg Min

-901 thru -908

0.056 thru 0.087

0.004 0.002 3/64 1/64

-909 thru -932

0.097 thru

0.118 or greater

0.006 0.003 1/16 1/32

All dimensions are in inches.

TECHNICAL REFERENCE DATA

(a) Submarine Fastening Criteria NAVSEA S9505-AM-GYD-010

1.e. Threaded fasteners (including self-locking fasteners and locking elements), Acme threads, and tapped (bolt) holes:

NOTE 26: Except for threads covered by pressure and non-pressure hull tapped hole inspections, removal of threaded fasteners or thread inserts only to determine acceptability of threads is not required.

NOTE 27: Reinstallation of studs with anaerobic sealant must be in accordance with recommended vendor procedures or approved local overhaul facility procedures.

NOTE 28: Threads should be cleaned before applying these acceptance criteria.

NOTE 29: Thread requirements apply to the load bearing portions of the fastener only. Defects are acceptable on the free end of the fastener only if they cannot cause damage to the engaging threads.

NOTE 30: Except for low-alloy and carbon steels above 1000°F or other fastener materials above 670°F, continued use of silver plated fasteners when the silver plating is worn is acceptable, provided that anti-galling (compound) lubricant per CID A-A-59004 (Molykote P-37 paste), is applied to the threads.

NOTE 31: Steam turbine fasteners with original copper plating disturbed need not be replated or replaced, provided anti-galling (compound) lubricant per CID A-A-59004 (Molykote P-37 paste) is used.

Except for low-alloy and carbon steels above 1000°F or other fastener materials above 670°F, if replacement fasteners are necessary, they need not be copper plated, provided anti-galling (compound) lubricant per CID A-A-59004 (Molykote P-37 paste) is used.

NOTE 32: Reference (a) should be used for repair, installation, and replacement of threads and fasteners.

MS NO. 5120-081-026 REV H CHG-6 Page 12 of 19

NOTE 33: “Type I” and “Type II” inspections as found in the GAC, serve only to identify different levels of inspection. “Definitions” of Type I and Type II have not been provided to avoid defining or guiding the level of inspection required, and to avoid the potential misapplication of the GAC requirements. It is intended that engineering or technical individuals invoke Type I, Type II, or an alternate fastener inspection level, depending on the specific application. A Type I inspection is typically used for pressure containing and critical thread SUBSAFE applications, LEVEL 1 applications, and other pressure containing applications. Type I fastener criteria is also normally applied to fasteners for which a torque requirement is also specified in the associated maintenance standard. A Type II inspection is typically used for non-critical applications. An engineering evaluation of the loads in the joint can result in exceptions to this general usage; for example, a Type II thread inspection is currently authorized for LEVEL 1 pressure containing pump cover fasteners in the SUBSAFE SSN688Cl Byron Jackson MSW pump.

NOTE 34: During an overhaul period, it is not necessary to replace the nylon locking pellets in male self-locking fasteners that were originally assembled with new locking pellets if the fastener is subsequently required to be disassembled to support shipboard installation/reassembly of the component or grooming/maintenance of the component.

1.e.(2) Type II threaded fasteners (including self-locking fasteners and locking elements) and tapped (bolt) holes:

1.e.(2)(a) Visible cracks are not acceptable.

1.e.(2)(b) Thread defects that do not go beyond the thread root diameter are acceptable provided total surface of all engaged threads is not reduced more than 10 percent as estimated visually.

1.e.(2)(c) Clearance fit threads must engage by hand.

1.e.(2)(d) The locking insert (plug, patch, or chemical patch type) on externally threaded male fasteners should be replaced at each reuse. If logistic problems prohibit such replacement, they may be reused if the locking element generates a breakaway torque of at least 25 percent of the value listed for the appropriate size in Reference (a) Table 3-4.

In those cases where repair activities encounter insurmountable scheduling or logistics circumstances, and subsequently judge that the fastener must be reused without replacing the locking element, an anaerobic thread locking compound in accordance with Reference (a) may be applied to allow future removal with just hand tools. (Example of “scheduling or logistics” problems:

unscheduled repairs of components with installed male fasteners, lack of nylon stock, insufficient time to send patch fasteners to a qualified vendor, broken machine tools that are used to manufacture the insert, and so on.) Loctite should not be used with any thread lube/anti-galling compound. For SUBSAFE, LEVEL 1, pressure-containing, underwater explosion (undex) qualified applications, or where the drawing records a torque value, engineering should recalculate an acceptable torque using an estimated Loctite coefficient of friction (cf). For non-critical applications, torque Loctited fasteners to “wrench tight”.

Self-locking nuts must meet the requirements of Reference (a) Paragraph 3-37.e(1).

1.e.(2)(e) Ineffective wrench flats, drive slots, or spanner wrench slots are not acceptable.

MS NO. 5120-081-026 REV H CHG-6 Page 13 of 19

1.g. Wall thickness:

NOTE 39: Wall thickness acceptance criteria applies to all wetted pressure boundary surfaces. Thickness measurements are not required in those areas where visual inspection verifies that no erosion or corrosion has occurred.

1.g.(1) Wall thickness criteria (sea-connected components):

NOTE 40: When the component being restored/overhauled is listed in the Equipment Guide List (EGL) of a URO MRC 008 or 035 inspection, the wall thickness requirements of URO MRC 008 or 035 Category A must govern. Subsequent to overhaul/restoration or repair, if any URO MRC 008 or 035 component being worked has wall thickness reduction greater than Category A condition and the component is to remain in service, all acceptance criteria of the related URO MRC must be met before an applicable Category B or C component can be placed back in service. Components that remain in Category D must be replaced.

1.g.(1)(a) Reduction from original drawing minimum wall thickness must not exceed 10 percent of:

1.g.(1)(a){1} original drawing minimum wall thickness, or

1.g.(1)(a){2} adjacent unaffected wall thickness if drawing dimensions are not available. Where the wall thickness in an area designated for inspection is considerably thicker than the immediately adjacent wall thickness, use the thinner wall thickness as the unaffected wall in determining the percent wall reduction.

1.g.(1)(b) Sharp edges on acceptable defects are not acceptable.

MS NO. 5120-081-026 REV H CHG-6 Page 14 of 19

1.h. V-ring packing seals (see NOTE 41 through NOTE 48):

Figure 8. V-ring Packing Seal

NOTE 41: Unless otherwise specified, surface finish and the size and spacing of surface defects may be estimated visually.

NOTE 42: Unless otherwise specified, rhr surface finish requirements apply only to surfaces surrounding acceptable defects and not to the defect areas themselves. Sharp or raised edges on acceptable defects are not acceptable.

NOTE 43: Diametral clearance, cavity height, and cavity width requirements apply to surfaces surrounding acceptable surface defects and not to the surface defect areas themselves.

NOTE 44: Hair-like visible defects with width and depth of 0.001” or less are acceptable regardless of length or location.

NOTE 45: Any metal removal must be held to the minimum necessary to meet acceptance criteria.

NOTE 46: Where original design drawing allowances exceed criteria specified in this section, the maximum allowed on the drawing applies.

NOTE 47: V-ring packing cavity width and packing gland diametral clearance with rod must always be measured to meet the requirements of Table 8 and Table 10, respectively.

NOTE 48: A dynamic sealing surface may be evaluated as static sealing surface if it meets the exception criteria as defined in the Definitions provided at the end of the document.

MS NO. 5120-081-026 REV H CHG-6 Page 15 of 19

1.h.(1) V-ring packing sealing surfaces:

1.h.(1)(a) V-ring packing dynamic sealing surface [1] and static sealing surface [2] must meet the requirements of Table 7.

1.h.(1)(b) Raised or sharp edges on acceptable surface defects are not acceptable.

Table 7. V-ring Packing Sealing Surface Requirements

Surface

Maximum Surface Defect Size

Minimum Surface Defect Spacing Remaining

Surface FinishWidth or

Length Depth Avg Min

Dynamic Sealing Surface 0.010 0.005 7/64 1/32 rhr 32

Static Sealing Surface 0.015 0.010 5/32 1/16 rhr 63

All dimensions are in inches.

1.h.(1)(c) Packing cavity width [A] must not exceed maximum drawing dimensions or the requirements of Table 8, whichever is greater.

Table 8. Packing Cavity Width Requirements

Nominal V-ring Cross-

Section

Dimension [A] Maximum

Packing Cavity Width

3/16 1/4 5/16 3/8 7/16 1/2

0.194 0.256 0.321 0.385 0.452 0.515

All dimensions are in inches.

MS NO. 5120-081-026 REV H CHG-6 Page 16 of 19

1.h.(2) V-ring packing gland:

1.h.(2)(a) V-ring packing gland surfaces must meet the requirements of Table 9.

1.h.(2)(b) Raised or sharp edges on acceptable defects are not acceptable.

Table 9. V-ring Packing Gland Surface Requirements

Surfaces

Maximum Acceptable Surface Defect Size

Minimum Acceptable Surface Defect

Spacing

Width or Length Depth Avg Min

Packing Gland Bore 0.060 0.030 1/8 -

Packing Gland Face (in way of

Adapter)

0.040 0.020 3/8 3/16

All dimensions are in inches.

1.h.(2)(c) Diametral clearance with rod must not exceed maximum drawing dimensions or requirements of Table 10, whichever is greater.

Table 10. Diametral Clearance Requirements

Packing Gland Max Diametral Clearance with Rod O.D.

Dimension B

Nominal V-ring Cross-

Section

Metallic Adapters

Non-Metallic Adapters

Max System Pressure 1500 psi

Max System Pressure 3000 psi

3/16 1/4 5/16 3/8 7/16 1/2

0.030 0.035 0.040 0.045 0.050 0.055

0.005 0.006 0.007 0.009 0.010 0.012

0.003 0.004 0.005 0.006 0.007 0.008

All dimensions are in inches.

1.h.(3) V-ring packing cavity depth assembly:

NOTE 49: Compression equals the total decrease over installed stack height which the packing undergoes due to installation and adjustment of the packing gland.

NOTE 50: Installed stack height is the total height which the packing occupies when installed in the packing cavity without the packing gland installed. This height may be greater than the free stack height due to the effect of squeezing the packing into the cavity.

NOTE 51: Shims may be used outside the packing gland, under the flange, or inside the gland to obtain the required clearance or compression.

MS NO. 5120-081-026 REV H CHG-6 Page 17 of 19

1.h.(3)(a) Endless rings: Clearance [3] (float space) between packing and gland ring must be from 0” to 0.030” (preferred for use where installation of endless rings is practicable).

1.h.(3)(b) Split rings: Compression [3] of installed packing must be from 0.020” to 0.030”.

MS NO. 5120-081-026 REV H CHG-6 Page 18 of 19

Definitions Acme Threads - a frequent thread choice for power transmission, yielding more efficiency than the typical machine thread, commonly known as a “V” thread. Although more difficult to machine, the Acme thread's basic screw geometry attributes to its lower losses, including friction, which in turn means less wear and ultimately longer life.

A “V” thread has an angle of 60 degrees between opposing faces, while the Acme is only 29 degrees.

Dynamic Radial Seal - an O-ring (or quad-ring) seal configuration where the parts being sealed are cylindrical, with one part contained within and concentric with the other, and subject to relative motion along the common cylinder axis. The direction of pressure is perpendicular to the plane containing the O-ring. Generally, the seal is constrained in the concentric space between the 2 sealed parts by means of a rectangular groove machined into the circumference of one of the mating sealing surfaces. Sealing is accomplished both by compression of the seal cross-section (squeeze) within the assembled gland and by some degree of pressure deformation of the seal into the gap between the sealed parts.

Note: For repairs and inspections, mating surfaces having relative motion must be considered static surfaces if the relative motion is intermittent with low frequency of operation and of 1 cycle or less. For example, the valve stem seal areas on valves that are normally operated only to accomplish specific system line-ups and are fully opened or closed when the stem is rotated 90 degrees (1/4 turn) should be considered static. All other areas are considered to be dynamic surfaces. Refer to NAVSEA-approved procedures for current brush plating requirements on static sealing and non-sealing surfaces.

Dynamic Surface - Dynamic surfaces are surface areas (sealing and non-sealing) that have relative motion with another part excluding mating surfaces where the relative motion is a slow rotation of less than 1 turn. The relative motion may be but is not limited to rubbing, sliding, hard intermittent contact, etc., as occurs in (but not limited to) the following:

1) Valve stem “O” ring seal area or groove (more than 1 turn required for valve operation)

2) Valve stem bore “O” ring seal area or groove (more…