ISO/TS 11686:2023

TECHNICAL ISO/TS
SPECIFICATION 11686
Second edition
2023-09
Connectors for fluid power and
general use — Assembly instructions
for connectors with adjustable stud
ends and O-ring sealing
Raccordements pour applications générales et transmissions
hydrauliques — Instructions d’assemblage pour des connecteurs avec
des éléments mâles ajustables et joint torique
Reference number
© ISO 2023
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Published in Switzerland
ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Instructions for the assembly of connectors with adjustable stud ends and O-ring
sealing . 1
4.1 Preparation prior to assembly. 1
4.2 Assembly . 2
4.2.1 Illustration . 2
4.2.2 Location of O-ring (Position 1 in Figure 1) . 2
4.2.3 Positioning of locknut (Position 2 in Figure 1) . 2
4.2.4 Installation of connector into the port (Position 3 in Figure 1) . 2
4.2.5 Connector adjustment (Position 4 in Figure 1) . 2
4.2.6 Final tightening (Position 5 in Figure 1) . 3
4.2.7 Final inspection . 3
Annex A (informative) Identification of ports, stud ends and plugs and potential for
incompatible intermixing .4
Bibliography . 9
iii
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
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electrotechnical standardization.
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described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO document should be noted. This document was drafted in accordance with the
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www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 131, Fluid power systems, Subcommittee
SC 4, Connectors and similar products and components.
This second edition cancels and replaces the first edition (ISO/TS 11686:2017), which has been
technically revised.
The main changes are as follows:
— Figure 1 has been completely redrawn and Positions 4 and 5 have been corrected to accurately
reflect the position of the washer, nut, O-ring and body.
— Figure 1 Position 3 and Figure 2 have been redrawn to remove horizontal line in the flowpath;
— in Table A.1, plug figures from ISO 11926 have been removed and adjustable figure to ISO 1179-3 has
been added.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
Introduction
In fluid power systems, power is transmitted and controlled through a fluid (liquid or gas) under
pressure within an enclosed circuit. In general applications, a fluid may be conveyed under pressure.
Components may be connected through their ports by connections (connectors) and conductors (tubes
and hoses). Tubes are rigid conductors; hoses are flexible conductors.
v
TECHNICAL SPECIFICATION ISO/TS 11686:2023(E)
Connectors for fluid power and general use — Assembly
instructions for connectors with adjustable stud ends and
O-ring sealing
1 Scope
This document provides common installation instructions for all connectors that have adjustable
stud ends and O-ring sealing. Conformance with the requirements of this document will result in a
considerable reduction of leaks in hydraulic systems.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 5598, Fluid power systems and components — Vocabulary
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 5598 apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
4 Instructions for the assembly of connectors with adjustable stud ends and
O-ring sealing
4.1 Preparation prior to assembly
4.1.1 To protect the sealing surfaces and prevent dirt and other contaminants from entering the
system, protective caps and/or plugs shall not be removed until it is time to assemble the components.
4.1.2 Just prior to assembly, protective caps and/or plugs shall be removed, and the connector and
the port shall be inspected to ensure that both mating parts are free of burrs, nicks, scratches or any
foreign material.
4.1.3 If an O-ring is not present, one shall be installed on the port end of the connector using a proper
O-ring installation tool, taking care not to cut or nick the O-ring.
4.1.4 The O-ring shall be lubricated with a light coat of system fluid or compatible oil.
4.2 Assembly
4.2.1 Illustration
Figure 1 illustrates the steps specified in 4.2.2 to 4.2.6 and the final assembly.
a) Position 1: Locknut b) Position 2: Locknut c) Position 3: Hand d) Position 4: Con- e) Position 5: Connec-
and washer backed in position to protect tightened into port nector backed off for tor tightened to final
off with O-ring in the back-up washer until back-up washer alignment to mating position (see 4.2.6)
position (see 4.2.2) from damage during contacts port face connector, tube
installation into the (see 4.2.4) assembly or hose as-
port (see 4.2.3) sembly (see 4.2.5)
Figure 1 — Illustration of instructi
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