9
HOSES AND FITTINGS
Care must be exercised in the use of hose and fi ttings
for use on hydraulic tools, especially
in con
fi
ned areas. Any obstruction or abrasive surrounding could damage the hose and cause a
serious accident. Always use the recommended hose for the tool that is being used. Always consult
the dealer or distributor for the correct hoses and purchase from him to ensure, from a safety
standpoint that the materials used in the manufacture of the hoses is to the correct speci
fi
cation
for the application. Fittings must meet the standards established by the industry to adequately
assure safety. Poor quality or low rated
fi
ttings are not to be used. They invite a serious accident.
Length:
Hose must be the correct length for the general use of the tool or for the speci
fi
c function it is
to provide. Pressure surge is an important factor in the selection of hoses. The hose should be rated
above the expected surge pressure to ensure adequate safety. Hoses that are too long will have a
tendency to coil, kink, or move in multiple directions creating a safety hazard. Hoses that are too long
will rub or chafe against the ground or projecting objects, seriously shortening the life of the hose. It
may be advisable to carefully restrain a hose which is temporarily too long for the current application.
Pressure surge can cause whipping, and seriously damage the hose. Always keep the hose length
as short as possible for the operation which is it intended.
Size:
The hose must be large enough to carry the pressurized
fl
ow of
fl
uid to the end application
without creating undue heat generation or excessive turbulence. These factors could cause excessive
wear to the hose from any or all of the above reasons.
Pressure:
Hose selection must be made so that the
recommended maximum operating pressure is
greater than the system pressure.
A surge or sudden drop in pressure will cause the hose to deteriorate
faster if the maximum pressure of the hose is signi
fi
cantly below the surge pressure. A hose with a
top rate of pressure as the line pressure of the installation is not an accepted safety practice. Always
err on the side of safety.
Temperature:
Hose can be seriously damaged by passing over or near hot objects. Avoid any situation
that will heat the hose. Serious damage and/or failure will occur.
Unusual Applications:
Careful thought and research should precede installation of hoses. Thorough
and protected testing, with appropriate safety guards, must be done to avoid injury before general use.
Connections:
Hoses must have the proper end
fi
ttings in order to mate correctly with connectors.
Worn or damaged connectors and worn end
fi
ttings on the ends of the hose can cause a failure.
Pressure surge can cause a slow or sudden failure at the connection causing serious damage or injury.
Safety Check:
Before using any installation, perform a thorough checkout to determine if any of the
above or unforeseen problems occur. Initial testing with safety guards is an invaluable safety precaution.
Always consult
the distributor or manufacturer for the correct speci
fi
cations regarding any of
the items discussed above.
The correct hoses and
fi
tting are available from your supplier.
There exists the potential for
SHOCK
or
ELECTROCUTION
in using anything other than certifi ed non-
conductive hoses and hydraulic oil with dielectric properties near
ENERGIZIZED ELECTRICAL LINES
.
Hoses and
fi
ttings used with this tool must comply with
S.A.E.
J1273
recommended practice for selection, installation, and
maintenance of hose assemblies.
FAILURE TO COMPLY WITH THESE WARNINGS
COULD RESULT IN SEVERE BODILY INJURY.
WARNING