Note: If you have the bike upside down, DO NOT actuate the brake levers as this will push air into the calipers and you will need to bleed the brakes to remove it. Also when replacing pads or removing the wheels, DO NOT actuate the lever as this could push the pistons within the caliper out of alignment.
Here are a couple of quick video guides that provide guidance for adjusting hydraulic disc brakes:
And here is a quick video on replacing the pads:
There are many reasons why you might need to bleed your brakes. If you are planning to bleed your brakes because of poor stopping ability, remember to check the wear of your brake pads first to ensure that they aren't the problem!
To bleed your brakes, you will need Bicycle Rated Mineral oil (we recommend Shimano or Tektro) which as well as a Bleeding Kit. You can find both of these items online or at your local bike shop!
Below are two great guides for bleeding brakes!
And here is a detailed video from Amstudio
If you have any questions please contact our techs at firstname.lastname@example.org
Attention: This guide aims to provide you with a reference for the task detailed. There are many more instructional guides online, so if you're still unsure, we recommend finding a guide you prefer. It is also worth noting that most bike shops provide brake bleeding as a service.
Remember, always be safe and test your brakes in a calm environment before riding in busy streets or on rough terrain . . . especially after maintenance such as this.
Link: Maintenance - Brake pads