Hose Products Division
Parker Hannifin Corporation
Wickliffe, Ohio
www.parkerhose.com
15
Crimping Machine
TH8-D206
Bulletin 4480-T22-US
• Cracked, damaged, or badly corroded Fittings;
• Leaks at Fitting or in Hose;
• Kinked, crushed, flattened or twisted Hose; and
• Blistered, soft, degraded, or loose cover.
4.3
Visual Inspection All Other: The following items must
be tightened, repaired, corrected or replaced as re-
quired:
• Leaking port conditions;
• Excess dirt buildup;
• Worn clamps, guards or shields; and
• System fluid level, fluid type, and any air entrap-
ment.
4.4
Functional Test: Operate the system at maximum
operating pressure and check for possible malfunc-
tions and leaks. Personnel must avoid potential haz-
ardous areas while testing and using the system. See
section 2.2.
4.5
Replacement Intervals: Hose assemblies and elas-
tomeric seals used on Hose Fittings and adapters will
eventually age, harden, wear and deteriorate under
thermal cycling and compression set. Hose Assem-
blies and elastomeric seals should be inspected and
replaced at specific replacement intervals, based on
previous service life, government or industry recom-
mendations, or when failures could result in unaccept-
able downtime, damage, or injury risk. See section
1.2.
4.6
Hose Inspection and Failure: Hydraulic power is
accomplished by utilizing high-pressure fluids to trans-
fer energy and do work. Hoses, Fittings, and Hose
Assemblies all contribute to this by transmitting fluids
at high pressures. Fluids under pressure can be dan-
gerous and potentially lethal and, therefore, extreme
caution must be exercised when working with fluids
under pressure and handling the Hoses transporting
the fluids. From time to time, Hose Assemblies will
fail if they are not replaced at proper time intervals.
Usually these failures are the result of some form of
misapplication, abuse, wear, or failure to perform
proper maintenance. When Hoses fail, generally the
high-pressure fluids inside escape in a stream which
may or may not be visible to the user. Under no cir-
cumstances should the user attempt to locate the leak
by “feeling” with their hands or any other part of their
body. High-pressure fluids can and will penetrate the
skin and cause severe tissue damage and possibly
loss of limb. Even seemingly minor hydraulic fluid
injection injuries must be treated immediately by a
physician with knowledge of the tissue damaging prop-
erties of hydraulic fluid.
If a Hose failure occurs, immediately shut down the
equipment and leave the area until pressure has been
completely released from the Hose Assembly. Sim-
ply shutting down the hydraulic pump may or may not
eliminate the pressure in the Hose Assembly. Many
times check valves, etc., are employed in a system
and can cause pressure to remain in a Hose Assem-
bly even when pumps or equipment are not operat-
ing. Tiny holes in the Hose, commonly known as pin-
holes, can eject small, dangerously powerful but hard
to see streams of hydraulic fluid. It may take several
minutes or even hours for the pressure to be relieved
so that the Hose Assembly may be examined safely.
Once the pressure has been reduced to zero, the Hose
Assembly may be taken off the equipment and exam-
ined. It must always be replaced if a failure has oc-
curred. Never attempt to patch or repair a Hose As-
sembly that has failed. Consult the nearest Parker
distributor or the appropriate Parker division for Hose
Assembly replacement information.
Never touch or examine a failed Hose Assembly un-
less it is obvious that the Hose no longer contains
fluid under pressure. The high-pressure fluid is ex-
tremely dangerous and can cause serious and poten-
tially fatal injury.
4.7
Elastomeric seals: Elastomeric seals will eventually age,
harden, wear and deteriorate under thermal cycling and
compression set. Elastomeric seals should be inspected
and replaced.
4.8
Refrigerant gases: Special care should be taken
when working with refrigeration systems. Sudden es-
cape of refrigerant gases can cause blindness if the
escaping gases contact the eye and can cause freez-
ing or other severe injuries if it contacts any other por-
tion of the body.
4.9
Compressed natural gas (CNG): Parker CNG Hose
Assemblies should be tested after installation and
before use, and at least on a monthly basis per AGA
1-93 Section 4.2 “Visual Inspection Hose/Fitting”. The
recommended procedure is to pressurize the Hose
and check for leaks and to visually inspect the Hose
for damage.
Caution: Matches, candles, open flame or other sources
of ignition shall not be used for Hose inspection. Leak
check solutions should be rinsed off after use.
MSDS’S (Available upon request)
Federal OSHA regulation 29 CFR 1910.1200 requires that we transmit to our customers Material Safety Data Sheets for
all material covered under the law. If you are an employer in SIC 20-39 who has not yet received them, you are required
to obtain them from us and provide the information to employees as directed in Section (b) of the regulation. Please
contact the Hose Products Division - Technical Services Department (PH) 440-953-5700 (FAX) 440-943-3129.
Safety Guide for Selecting and Using Hose, Fittings and Related Accessories
