Working on your own can be an immensely rewarding thing. Whether it's an automotive project you're at work on or simply learning some new skills, there's a deep joy to be had by putting something which works together. Issues do arise though, especially when it comes to a piece of equipment that can cause catastrophic failure if it's improperly installed. That's the case with hydraulic hose fittings, which are integral to the successful operation of millions of machines around the globe. If fitted incorrectly, these fittings can leak, disconnect or (in the most extreme cases) snap off entirely. That's why we've decided to put together this brief guide on how to fit a reusable hose fitting safely and correctly. To begin, we're going to need a few things; a hose cutter, an open ended wrench (in the diameter of your fitting), a vice and lubricant. If you don't have the right size wrench, use a monkey wrench instead, ensuring you've got a good grip on the fitting. First, get your length of hydraulic hose and hose cutter. There's a good chance that the hose will have been cut straight in the factory but we're still going to give it a trim. Get your hose cutter and make a straight, clean cut at the top of the hose, just taking enough off to level it out. Now, thread your outside collar into the hose, using your wrench to turn it counter-clockwise as you go. Make sure not to over-tighten the outside collar by looking into the fitting, the hose should just touch the base, and not overlap any threading inside the chamber. Then, place the collar and hose into a vice and lubricate your fitting. This is the difficult part, as getting the stems to line up isn't easy. That said, if you're really forcing it, you're likely doing it wrong and should start again. Begin tightening the fitting inside the collar and keep going until you approach the point where they're within touching distance. At this point, do NOT tighten any further. Having these two pieces touching is over-tightened and can lead to leaks and breakages, leave a small gap for safety.