May 25th, 2018
When high-pressure hydraulic hoses fail, they can be responsible for lost productivity, equipment failure, and personal injury – all coming at a steep cost to the machine or company owner. In hydraulically controlled equipment, some component locations cannot be changed due to the structure of the equipment. Work should ideally be done upfront by a designer to eliminate as many potential leak points and make maintenance as simple as possible.
When hydraulic hose installation is straight, there must be enough slack in the hose to allow for natural changes in length when pressure is applied and to accommodate for possible component movements and machine vibration. If the hose is too short, it may pull from the hose end fitting or stress the hose fitting connection eventually causing damage. On the other hand, if there is too much slack in the hose, the hose may snag on other pieces of equipment or rub on other components causing premature wear and tear.
Mechanical straining of the hydraulic hose should be avoided, such as not adhering to the minimum bend radius. A tighter bend radius will cause an excessive force to be applied to the inner wall of the hydraulic hose causing a weak point and shortening the hose lifespan.
Proper hydraulic hose routing also affects the selection of hose ends as the correct hose end can eliminate unnecessarily strain. For example, if a hydraulic hose must be fitted into a tight space that wouldn’t adhere to the minimum bend radius, using a 90-degree elbow can eliminate unnecessary hose length or awkward positions.
Like fitting selection, the correct clamping or support system is also very important to securely route the hose. Fastening the hydraulic hose correctly avoids the hose contacting other components or rubbing together. During installation, avoid fastening, crossing, or clamping high and low-pressure hoses together. The changes in length during use could wear on the hose covers causing damage.