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2006 lincoln navigator requires a 7mm hex to remove brake caliper
You need a 15 mm regular wrench.
Remove brake caliper and caliper frame. Rotors are now free.
You first remove the caliper, then the caliper mounting bracket. Then the rotor is free.
Remove wheel, remove the bolt holding brake hose to the caliper, remove the two pins that hold the caliper to the caliper bracket using a 3/8" allen wrench, remove caliper. Inspect brake pads and brake hose for damage, replace if necessary. Install new brake caliper in reverse order. Bleed system.
18mm
Remove brake caliper and then caliper mounting frame . Rotor is now free.
A 3/8" Allen wrench will remove that bolt on the front caliper.
7mm
3/8"
use an Allen wrench not a socket or open or box wrench.
1. Remove the brake hose to caliper bolt from the brake caliper. 2. Remove the brake hose from the brake caliper. 3. Remove and discard the 2 copper brake hose gaskets. These gaskets may be stuck to the brake caliper and/or the brake hose end. 4. Cap or plug the opening in the brake caliper and the brake hose to prevent fluid loss and contamination. 5. Remove the 2 brake caliper pin bolts. Remove the park brake cable from the caliper. 6. Remove the brake caliper from the brake caliper bracket.