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Truck(Fleet)PTFE &HydraulicTechnical&ThermoplasticAlphanumericTooling&CoiledHose,HoseAirApprovals& ProductsHose& DesignPneumaticTubingFittingsEquipmentAccessoriesIndexGuides Selection, Installation & Maintenance FittingsFit.&HoseInformationAccessories& 5.24 Hose Movement and Bending � Hose allows relative hose socket from another manufacturer. It is the responsibility motion between system components. Analyze this motion of the fabricator to consult the manufacturer's written when designing hose systems. The number of cycles per day instructions or the manufacturer directly for information on may significantly affect hose life. Also avoid multiple planes ofproper fitting components. motion and twisting motion. Consider the motion of the hose when selecting hose and predicting service life. In applications6.3 Hose and Fitting Compatibility � Care must be taken to that require hose to move or bend, refer to Figures 6 and 7; determine proper compatibility between the hose and fitting. and use these practices: Base selection on the manufacturers' recommendations substantiated by testing to industry standards such as 5.24.1 Bend in Only One Plane to Avoid Twisting SAE J517. Hose from one manufacturer is not usually compatible with fittings from another. Do not intermix hose and fittings from two manufacturers without approval from both manufacturers. Correct 6.4 Hose Assembly Equipment � Assembly equipment from one manufacturer is usually not interchangeable with that Incorrect from another manufacturer. Hoses and fittings from one manufacturer should not generally be assembled with the equipment of another manufacturer. FIGURE 6 -- BEND IN ONLY ONE PLANE 6.5 Safety Equipment � During fabrication, use proper safety TO AVOID TWISTING equipment, including eye protection, breathing apparatus, and adequate ventilation. 5.24.2 Prevent Hose Bending in More Than One Plane � If 6.6 Reuse of Hose and Fittings � When fabricating hose as- hose follows a compound bend, couple it into separate semblies, do not reuse: segments, or clamp into segments that flex in only one plane. A. Field-attachable fittings that have blown or pulled off hose. Correct B. Any part of hose fittings that were permanently crimped or swaged to hose. Incorrect C. Hose that has been in service after system check out (see 7.7). 6.7 Cleanliness of Hose Assemblies � Hose assemblies may FIGURE 7 -- PREVENT HOSE BENDING IN be contaminated during fabrication. Clean hoses to specified MORE THAN ONE PLANE cleanliness levels (see 5.13). 6. Hose-Assembly Fabrication � Persons fabricating hose 7. Hose Installation and Replacement � Use the following assemblies should be trained in the proper use of equipment practices when installing hose assemblies in new systems or and materials. The manufacturers' instructions and the replacing hose assemblies in existing systems: practices listed as follows must be followed. Properly assembled fittings are vital to the integrity of a hose assembly.7.1 Pre-Installation Inspection � Before installing hose as- Improperly assembled fittings can separate from the hose and semblies, examine: may cause serious injury or property damage from whipping hose, or from fire or explosion of vapor expelled from the hose. A. Hose length and routing for compliance with original design. 6.1 Component Inspection � Prior to assembly, examine components for: B. Assemblies for correct style, size, length and visible A. Style or type nonconformities. B. Cleanliness C. Loose covers C. Fitting sealing surfaces for burrs, nicks, or other D. Nicks damage. E. Size F. Inside obstructions NOTE: When replacing hose assemblies in existing systems, G. Visible defects verify that the replacement is of equal quality to the original H. Damage assembly. I. Length J. Blisters 7.2 Handling During Installation � Handle hose with care dur- K. Burrs ing installation. Kinking hose, or bending at less than minimum bend radius may reduce hose life. Avoid sharp bending at the hose/fitting juncture (see 5.21). 6.2 Hose Fittings � Hose fitting components from one manufacturer are not usually compatible with fittings 7.3 Twist Angle and Orientation � Pressure applied to a components supplied by another manufacturer. For example, twisted hose may shorten the life of the hose or loosen the do not use a hose fitting nipple from one manufacturer with a connections. To avoid twisting, use the hose lay line or mark- ing as a reference (see Figure 8). 270 Parker Hannifin Corporation Parflex Division Ravenna, Ohio
Goodyear Rubber Products
