Using this Haier front - loader washer door hinge is quite simple. First, make sure your washing machine is unplugged to avoid any electrical hazards. Then, carefully remove the old door hinge by unscrewing the bolts. Align the new hinge with the mounting holes (which are 120mm apart) and secure it using the bolts. Once it's firmly in place, you can plug in your washing machine and start using it as normal. As for maintenance, keep the hinge clean. You can use a mild detergent and a soft cloth to wipe it down from time to time. Avoid using abrasive cleaners as they may damage the hinge. If you notice any unusual noises or problems with the door movement, check the hinge for loose bolts. If you can't fix the issue, contact our customer service. Remember, this hinge comes with a full guarantee, so you can rely on us for support.