How do you compress the pistons on a Volvo rear disc brake?

To compress the pistons on a Volvo rear disc brake, first, remove the wheel and access the brake caliper. Use a specialized brake caliper tool or a C-clamp to gently push the piston back into the caliper housing. If the caliper has an integrated parking brake, you may need to rotate the piston while pushing it in, so ensure to follow the specific procedure for your Volvo model. Once compressed, you can reinstall the caliper and wheel.