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AMSC N/A FSC 4810

DISTRIBUTION STATEMENT A. Approved for public release. Distribution is unlimited.

NOT MEASUREMENT

SENSITIVE

MIL-STD-2193C(SH)

w/CHANGE 1

9 February 2018

SUPERSEDING

MIL-STD-2193C(SH)

30 November 2012

DEPARTMENT OF DEFENSE

DESIGN CRITERIA STANDARD

SHIP HYDRAULIC SYSTEM COMPONENTS

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MIL-STD-2193C(SH)

w/CHANGE 1

iii

SUMMARY OF CHANGE 1 MODIFICATIONS

1. Various document IDs, document titles, and source statements throughout Section 2 were updated in accordance

with their respective repository’s most recently published information. Reference document IDs were updated as

appropriate throughout the text of this document.

2. Added the following references to Section 2:

a. ASTM E8/E8M, Standard Method for Tension Testing of Metallic Materials;

b. ISO 3019-1, Hydraulic Fluid Power – Dimensions and Identification Code for Mounting Flanges and Shaft

Ends of Displacement Pumps and Motors – Part 1: Inch Series Shown in Metric Units;

c. ISO 3019-2, Hydraulic Fluid Power – Dimensions and Identification Code for Mounting Flanges and Shaft

Ends of Displacement Pumps and Motors – Part 2: Metric Series;

d. SAE-J744, Hydraulic Pump and Motor Mounting and Drive Dimensions;

e. NFPA T2.12.1, Hydraulic Fluid Power – Systems and Products – Method of Measuring Average

Steady-State Pressure; and

f. SAE-AS83485, O-Ring Molded from AMS7287 Material.

3. Deleted the following references from Section 2:

a. MIL-G-5514, Gland Design; Packings, Hydraulic, General Requirements for;

b. MIL-PRF-17672, Hydraulic Fluid, Petroleum, Inhibited;

c. MIL-H-19457, Hydraulic Fluid, Fire-Resistant, Non-Neurotoxic;

d. MIL-H-22072, Hydraulic Fluid, Catapult, NATO Code Number H-579;

e. NFPA T2.12.2, Hydraulic Fluid Power – Systems and Products – Method of Reporting Traceability of

Measurements; and

f. SAE-AMS-R-83485/1, Rubber, Fluorocarbon Elastomer, Improved Performance at Low Temperatures,

O-Rings, Sizes and Tolerances.

4. Added biobased materials to recycled, recovered, or environmentally preferable materials in 4.1.

5. Changed the requirement in 4.2 to include end-use hydraulic system fluid and reference to MIL-PRF-6083.

6. Changed the low ductility and high transition temperature material requirement in 5.1.1.

7. Added “(see 6.1.4)” to the end of the last sentence in 5.2.8.1.

8. Deleted all instances of MIL-G-5514 in table II.

9. Changed the first sentence of 5.2.14.3 to state, “Flanges shall conform to MIL-DTL-24704, ISO 3019-1,

ISO 3019-2, SAE-J744, or SAE-J518-1 except other flanges…”

10. Changed the pressure drop test fluid requirement in 5.3.1.6.

11. Changed the immersion test requirements in 5.3.1.7.

12. Added new paragraph (6.1.4) to provide technically acceptable allowance for the continued use of MIL-G-5514.

13. Added new acquisition requirement (item d) in 6.2.

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MIL-STD-2193C(SH) 
w/CHANGE 1 
 
v 
CONTENTS 
 
PARAGRAPH  PAGE 
 SCOPE ...................................................................................................................................................................... 1 
1  Scope. ................................................................................................................................................................. 1 
2  Purpose. .............................................................................................................................................................. 1 
3  Implementation guidance. ................................................................................................................................... 1 
 APPLICABLE DOCUMENTS ................................................................................................................................ 1 
1  General ............................................................................................................................................................... 1 
2  Government documents. ..................................................................................................................................... 1 
2.1  Specifications, standards, and handbooks. ................................................................................................... 1 
3  Non-Government publications. ........................................................................................................................... 3 
4  Order of precedence ............................................................................................................................................ 6 
 DEFINITIONS ......................................................................................................................................................... 6 
1  Radial static external seal ................................................................................................................................... 6 
2  Radial static internal seal .................................................................................................................................... 6 
 GENERAL REQUIREMENTS ................................................................................................................................ 6 
1  Recycled, recovered, environmentally preferable, or biobased materials ........................................................... 6 
2  Compatibility. ..................................................................................................................................................... 6 
3  Materials. ............................................................................................................................................................ 6 
4  Environmental conditions. .................................................................................................................................. 6 
4.1  Ambient pressure. ........................................................................................................................................ 6 
4.2  Ambient temperature. .................................................................................................................................. 6 
 DETAILED REQUIREMENTS ............................................................................................................................... 6 
1  Materials. ............................................................................................................................................................ 6 
1.2  Plated coatings. ............................................................................................................................................ 7 
1.2.1  Cadmium and zinc plating. ................................................................................................................... 8 
1.2.2  Aluminum alloys. ................................................................................................................................. 8 
1.2.3  Ferrous alloys. ....................................................................................................................................... 8 
1.3  Plastic parts. ................................................................................................................................................. 8 
1.4  Prohibited materials. .................................................................................................................................... 8 
1.5  Mercury contamination. ............................................................................................................................... 8 
2  Construction. ....................................................................................................................................................... 8 
2.1  Standard parts. ............................................................................................................................................. 8 
2.2  Reverse installation. ..................................................................................................................................... 8 
2.3  Structural strength. ....................................................................................................................................... 8 
2.4  Weight. ........................................................................................................................................................ 9 
2.5  Surface roughness. ....................................................................................................................................... 9 
2.6  Alignment. ................................................................................................................................................... 9 
2.7  Orifices. ....................................................................................................................................................... 9 
2.8  Seals. ............................................................................................................................................................ 9 
2.8.1  Gland design and related requirements. ................................................................................................ 9 
2.8.3  Elastomeric seals other than O-rings. ................................................................................................. 10 
2.8.4  Back-up rings. ..................................................................................................................................... 10 
2.9  Fasteners. ................................................................................................................................................... 10 
2.9.1  Threaded inserts. ................................................................................................................................. 12 
2.9.2  Bolt hole diameter. .............................................................................................................................. 12 
2.9.3  Safety. ................................................................................................................................................. 12 
2.9.4  Self-locking devices. ........................................................................................................................... 12 
2.9.5  Washers. ............................................................................................................................................. 12 
2.10  Retainer rings. .......................................................................................................................................... 12 
2.10.1  Load limitation. ................................................................................................................................. 12 
2.10.2  Installation clearances and tolerances. .............................................................................................. 12 
2.10.3  Installation and removal. ................................................................................................................... 12 
2.11  Spring pins. .............................................................................................................................................. 12 
2.12  Function-adjustment screws. ................................................................................................................... 13 
2.13  Bleeding and sampling............................................................................................................................. 13 
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