● Clean up, disposal and replacement of lost hydraulic fluid.
● Lose of fluid damage to other components.
● The potential for damage caused by the ingress of contaminants.
● System downtime.
What are some of the causes of hydraulic hose failures?
External damage
► Hose manufacturers estimate 80% of hose failures are the result of external physical damage. The source can be from kinking, crushing, abrading or pulling of the hose. Abrasion from hoses rubbing against one another or adjacent surfaces is the most common.
Bending in multiple planes
► A hydraulic hose bent in more than one plane can see a twisting of its wire reinforcement. 5 degrees of twist can reduce a high pressure hose’s service life by as much as 70%. 7 degrees of twist - a 90% reduction in service life.
Operating conditions
► Operating conditions will ultimately determine a hose's service life. Temperature extremes, e.g. high operating temperatures followed by very cold conditions when not in use will accelerate aging of the hose's rubber tube and cover.
► Frequent and extreme pressure fluctuations accelerate hose fatigue. The application of accumulators in hydraulic service manifolds and at the actuator can help reduce this kind of wear.
Inspect your hydraulic hoses regularly. Replace any that have bubbles in the outer cover or which have cuts or holes in the outer rubber cover. If you are conducting long tests and the tests would be invalid if your equipment failed during the test, consider replacing critical hoses before starting.
98 Series Rod Ends and 99 Series Swivel Bases Shore Western manufactures fatigue rated rod ends and swivel bases for the hydraulic actuators. The rod ends have standard size threaded holes to mate with industry standard threaded rod ends. The swivel base ends have standard bolt patterns to match and mount directly on other manufacturer's actuators. The fatigue rated clevises have a clamp bolt to remove backlash and decrease noise when operated with reciprocation loads. Typical applications include
98 and 99 Series Rod and Base Ends set the standard for actuator accessory design unmatched in extreme and grueling test conditions. Advanced design and quality components makes Shore Western actuator swivels and base ends your best choice for testing applications. Both Series are available in sizes ranging from 3.3 Kips (15 kN) to 500 Kips (2000 kN). Swivel bases offer 360 degrees of rotation and +/- 30 degrees of angular displacement.
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Reducing backlash while maintaining its freedom to pivot, a swivel base is a semi-spherical bearing with an adjustable preload mechanism. Impact noise reduction, minimized friction and improvement of test results during load reversals found in tension and compression testing or in high frequency testing can be achieved with proper bearing preload adjustment. A swivel base can be used anywhere a backlash free swivel connection is required.
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A swivel rod end provides the same benefits as a swivel base. In structural testing applications equipping an actuator equipped with both a swivel rod end and swivel base allows pivotal freedom of the actuator at both ends. The freedom to pivot at both ends minimizes moment loads on the load cell and piston rod bearings.
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