Page 29 - RHAU-MKT RYCO Product Technical Manual 2018-12-14 v1-9
P. 29

     HYDRAULIC HOSE AND COUPLING TOLERANCING
A common misconception is that IF a coupling matches to a hose that meets SAE or EN (DIN) specification THEN that coupling will match with ALL hydraulic hoses that meet that specification. Conversely, IF a hose that meets SAE or EN (DIN) specification matches to a coupling THEN that hose will match with ALL couplings made for hoses within that specification. THIS IS SIMPLY NOT TRUE.
As stated in SAE J517, the specification for Hydraulic Hose:
”SAE J517 HOSE FROM ONE MANUFACTURER IS USUALLY NOT COMPATIBLE WITH SAE J516 CONNECTORS SUPPLIED BY ANOTHER MANUFACTURER. IT IS THE RESPONSIBILITY OF THE (HOSE ASSEMBLY) FABRICATOR TO CONSULT THE MANUFACTURER'S WRITTEN INSTRUCTIONS OR THE MANUFACTURERS DIRECTLY BEFORE INTERMIXING HOSE AND CONNECTORS FROM TWO MANUFACTURERS”.
There are various societies and organisations that develop specifications for Hydraulic Hose. The major ones are: SAE The Society of Automotive Engineers
EN European Normes (based on the former DIN German standards)
ISO International Organization for Standardization
AS Australian Standards
These standards cover the performance specifications and dimensional tolerances of Hydraulic Hose.
SAE dimensional tolerances are the most widely used. EN, ISO and AS dimensional tolerances are similar to the corresponding SAE standard. Therefore, it is generally possible to meet the dimensional tolerances of these standards with a single series of hose. In the main, EN (DIN) standards have higher working pressures than their corresponding SAE standards.
Dimensional tolerances of these standards are quite broad. Hoses not manufactured to tight tolerance control may still meet these standards, but will perform poorly due to compression variations and will have assembly difficulties. This is not commonly understood. Hence, the common misconception stated above.
RYCO Hydraulics has its own HYDRAULIC HOSE SPECIFICATION. RYCO dimensional tolerances are much tighter than SAE or EN, and often have higher maximum working pressures.
Close tolerancing enables RYCO to provide higher performance Hydraulic Hose. RYCO Couplings are designed to match technically superior RYCO Hydraulic Hose. Superior technology gives SAFER, STRONGER AND LONGER LASTING HOSE ASSEMBLIES.
DO NOT MIX/MATCH HOSE AND COUPLINGS FROM ONE MANUFACTURER WITH HOSE AND COUPLINGS FROM ANOTHER MANUFACTURER.
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RYCO EXPERIENCE
      RYCO HOSE IS MATCHED TO RYCO COUPLINGS
 27
TECHNICAL ADAPTORS COUPLINGS HOSE INTRODUCTION






























































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