1. Use a C-clamp to compress the piston:
* Place a C-clamp parallel to the brake pad.
* Tighten the C-clamp until the piston is compressed.
2. Continue to tighten the C-clamp until the piston is fully seated in the caliper.
Method 2
1. Use a brake pad spreader to compress the piston:
* Place the brake pad spreader between the brake pads.
* Turn the screw on the brake pad spreader until the piston is compressed.
* Continue to turn the screw until the piston is fully seated in the caliper.
Tip: Apply grease to the caliper guide pins and brake pad backing plates to make the process easier.