When hydraulic fittings fail, the results can be catastrophic, as we saw here. Hydraulic hoses themselves are also vulnerable, which is why machines like this tree-processing behemoth will have their hoses wrapped in protective spirals made by companies like Caplugs:
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But how do they get the spiral wrapped around the hose? You probably picture some elaborate and gigantic manufacturing machine. Instead, it’s a simple rig that amounts to two tubes and a hand drill, demonstrated here by protective sleeve manufacturer Havel:
Inventing jigs like this must be super-satisfying work, especially that first time that you get it to work.
Source: core77