To replace brake pads:
- Unscrew the brake pad pins (use 3 mm hex key).
- Remove the old brake pads from the caliper.
- Clean the exposed surfaces of brake caliper pistons. Remove any corrosion from the pad pins with a medium scotch brite pad.
- Use a flat-end screwdriver to push in the pistons.
- Apply some copper grease to the backing plate of the brake pads and place them into the caliper.
- Add some blue loctite to the threads of the brake pad pins and torque them to 8 Nm.
The brake pad change is a good time to give the calipers a clean-up to prevent corrosion and accumulation of dirt. Use a brake-cleaner and an old toothbrush to get into hard-to-reach areas.
Replace the brake pad pins, if heavily corroded.
Always pump up the brakes after a brake pad change!