Please note however that I am in no way responsible for what you do with or what happens due to this instructable or anything left out of it. Undertake it completely at your own risk and only if you are comfortable with a project of this type. If you fail to get the pedals back together correctly, they could fail while riding potentially causing a serious injury, crash, or both. If anything looks worn out or you are in anyway uncomfortable taking this risk into your owns hands, seek a professional.
Step 1: Tools/Parts You Will Need
Tweezers. These really help reach into tight places and handle the loose balls from the bearings.
Hex wrench that fits in the spindle. You will need this to remove the pedals from the bike and to take the spindle out of the pedal body.
Grease. I chose to use Phil Wood waterproof grease. It is kind of expensive, but the best grease I have found.
Small screwdriver to pry out the end caps if like mine, yours aren't threaded.
Loctite. This isn't necessarily a requirement, but I chose to use it for added security from the pedals loosening over time.
Rag. Good to work on so your work surface stays free of grease.
Degreaser. You need something to get the old grease out/off of the existing parts.