Assemblies
315
Steps in Hose Assembly
10.
Some applications require the addition of a protective
outer sleeving or strain reliefs. If this is a requirement,
the most appropriate time to assemble is before the
second end fitting is applied. Choose the appropriate
product for the specific application. When cutting
product to length, allow for flexing and bending of
the hose.
11.
Even if not required, it is a good practice to examine
and audit the assembly before delivery or use. Records
should be maintained. The level of inspection should be
in compliance with the quality plan.
a) Inspection – Visual, dimensional and proof pressure
testing in accordance with SAE J517 or SAE J343.
b) Clean or flush of the assembly to remove plating
dust, rubber chips, etc.
c) Apply caps, if required, to protect fitting threads
and keep out contamination.
d) Apply labels or specific markings, if required.
e) Package the assembly properly.
Final Inspection Checklist
›
Bulge behind the fitting
›
Cocked fittings
›
Cracked fittings
›
Rusted fittings
›
Exposed reinforcement
›
Freedom of swivels
›
General appearance of the assembly
›
Internal contaminants
›
Restriction of the tube
Recommended Inspection Equipment
›
Worktable suitable for inspection
›
Tape measure to measure overall length
›
Calipers for measuring crimp diameter
›
Pi tape to measure outside diameter
›
Plug gauges for measuring inside diameter
›
Protractor device for measuring angle orientation of
bent tube fittings
›
Magnifying glass and light to view inside of assemblies
›
Burst and proof pressure tester
Hose Assembly Instructions
Uni-Crimp™ 2-Piece Crimped Fitting
1.
Determine correct hose length from desired hose
assembly length and “C” dimension. The “C” dimension,
or cut-off factor, can be found in the fitting tables. More
information on using the “C” dimension can be found
in the previous subtopic, “Defining Hose and Assembly
Length.”
2.
Cut hose to required length using a cut-off saw or a
circular abrasive cut-off wheel. The preferred choice
would be the steel wheel with a cooling agent. Care
should be taken in not overheating the hose, which
can cause deformation of the hose and create difficulty
when inserting the hose fittings. For textile-reinforced
hose, a guillotine-style cutter may be used.
Cut-off saw. Use caution when operating power equipment. Follow
the proper safety measures per manufacturer suggestions.
90
˚
Hose with square cut.
3.
Ensure hose is cut squarely.
Appendix
Installation & Maintenance
Assemblies
Equipment & Accessories
Fittings
Hoses