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4300Catalog Assembly/Installation EO-2Assembly 24� Flareless Bite CONDITION PROBABLE CAUSE(S) RECOMMENDATION Immediate leakage when � Improper ferrule/bite ring � Reset ferrule to ensure that the lead- system is pressurized orientation ing edge of ferrule/bite ring is pointing towards end of tube and seat of the mating fitting Additional/excessive stress � Non-square tube cut; tube not � Re-cut tube to 90� � 1� apparent on bite being properly supported in seat of adapter Flexural stresses allow tube � Tube not fully supported in � Reset tube end. This time ensure that to"rock" back and forth fitting's body seat the tube is bottomed in the presetting tool or fitting body Poor ferrule/bite ring pre-set � Tube may be too hard; or � Use fully annealed tube max hardness and/or tube collapse preset pressure or torque RB 72 for steel, RB 90 for stainless might be too high steel � Consult manufacturer's minimum tube � Tube is too thin wall thickness requirements; tube sup- ports must be used with certain thin- walled steel or stainless-steel tube. Review preset requirements Tube not bottoming out in � Improper preset or wrong tool � In the presetting process, it is important fitting body used for presetting to exert axial force on the tube to keep it fully bottomed in the tool. Check for indentation on end of the tube Shallow bite of ferrule or cut � Worn preset tool � Replace preset tool ring into tube � Too low preset pressure or � Observe manufacturer's torque recommendation for proper preset � Tube too hard � Ensure that tube is of correct hardness or material � Tube not bottomed against � Hold tube against stop in preset stop initially in preset Tube pulls out of fitting in � Improper preset � Preset must be inspected for evidence application and ferrule skives of proper preset, such as raised ridge end of tube of metal in front of leading edge � Tube too hard � Ensure that tube is of proper hardness and material � Excessive internal pressure � Ensure that internal pressure is within rating of fitting (tube might be of a higher rating) � Excessive axial load on tube � Avoid additional axial load than that caused by internal pressure � Inadequate make up � Follow proper presetting and assembly procedures Fitting nut is tight but leakage � Overset ferrule � Excessive force used in presetting of still occurs ferrule can cause it not to spring back and effect a seal. Follow manufacturer's recommendation for preset � Cracked tube � Check tube for circumferential crack due to fatigue � Damaged components � Check components for damage such as nicks, scratches and cracks T34 ParkerHannifinCorporation TubeFittingsDivision Columbus,Ohio http://www.parker.com/tfd
Goodyear Rubber Products
