Page 29 - 2019 Product Technical Manual - Hydraulics
P. 29

IIYCO
RYCO EXPERIENCE
HYDRAULIC HOSE AND COUPLING TOLERANCING E
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) S
specification matches to a coupling THEN that hose will match with ALL couplings made for hoses within that specincation. 3
THls is SIMPLY NOT mus. ,3
P-
As stated in SAE lsi 7, the specification for Hydraulic Hose: 5
"six: 1511 HOSE mom on: MANUFACTURER is usuAl.l.v NOT COMPATIBLE WITH SAE 1515 CONNECTORS SUPPLIED
av ANOTHER MANUFACTURER. IT is THE RESPONSIBILITY or THE (HOSE ASSEMBLY) FABRICATOR To CONSULT THE
MANUFACTURER'S WRITTEN INSTRUCTIONS on THE MANUFACTURERS DIRECTLY asrons INTERMIXING HOSE AND
CONNECTORS mom Two MANUFACTURERS".
There are various societies and organisations that develop specifications for Hydraulic Hose. The major ones are: H,
SAE The society ofAutomotive Engineers 3
an European Normes (based on theformer um German standards) I
lso international organization for standardization
AS Australian standards
These standards cover the performance specincations 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 ofthese standards with a single series of
hose. In the main, EN (DIN) standards have higher working pressures than their corresponding SAE standards. 3
Z
Dimensional tolerances ofthese standards are quite broad. Hoses not manufactured to tight tolerance control may still 3
meet these standards, but will perform poorly due to compression variations and will have assembly difficulties. This is not 3
commonly understood. Hence, the common misconception stated above. 8
nvco Hydraulics has its own HYDRAULIC HOSE SPECIFICATION. RVCO dimensional tolerances are much tighter than
SAE or EN, and often have higher maximum working pressures.
close tolerancing enables mfco to provide higher performance Hydraulic Hose. RVCO couplings are designed to match
technically superior mfco Hydraulic Hose. superior technology gives SAFER, STRONGER AND LONGER LASTING 3
HOSE ASSEMBLIES. E
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DO NOT MIX/MATCH HOSE โ€˜ ! , E
AND COUPLINGS FROM
ONE MANUFACTURER _
WITH HOSE AND COUPLINGS
F R 0 M A N OT H E R
MANU FACTU RER.
RYCO HOSE IS MATCHED TO RYCO COUPLINGS
HIGHER TECHNOLUGV EOUALS GREATER PERFORMANCE 27


















































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