The servicing and repairing process for rear disc brakes on F-250/350 and F-450/550 vehicles starts with using only clean brake fluid from the correct manufacturer specifications to prevent contamination and damage which requires avoiding previously drained fluid. Both
Brake Pads or shoes should be replaced during maintenance operations to maintain balanced braking performance. Exposed painted and plastic surfaces must get immediate brake fluid cleanup through water cleaning. Begin the procedure by draining brake fluid until it reaches half of the brake master cylinder reservoir level and afterward take off the wheel combined with the tire. You must first uninstall the shield with its two brake tube shield nuts before installing it back reinstating the nuts using torque to 35 Nm (26 lb-ft). The
Brake Caliper and anchor plate for F-450 vehicles can be accessed after removing the upper caliper anchor plate bolt followed by loosening the lower bolt so the brake caliper pivots for tool access to tighten the upper caliper bolt to 400 Nm (295 lb-ft) with a butterfly socket adaptor (Snap On(R) stock #SBS30) in reinstallation. Disassemble the brake caliper bolts only after placing the caliper sight hole out of your path to minimize damage to parts but never dangle the caliper from brake hose lines. Support the caliper by using mechanic's wire before tightening the bolts to 35 Nm (26 lb-ft) for F-250/350 SRW units or to 76 Nm (56 lb-ft) for F-350 DRW models or to 62 Nm (46 lb-ft) for F-450/550. Bug the brake pads from their mounts before examining them for damage then throw away all four retraction clips. Inspection of the brake caliper must be conducted for leaks while measuring the disc brake thickness for replacement when specifications are not met. The disc brake anchor plate assembly needs an inspection that includes an examination of guide pin boots for damage as well as verification that guide pins have normal movement and are in good condition; silicone brake caliper grease must be used for lubrication when needed. Before inserting the caliper piston into the caliper bore protect the piston and boots because they can suffer damage. The installation process should be completed by following the reverse order of removal steps and adding new retraction clips before using suitable equipment and a worn brake pad to push brake caliper pistons into the caliper unit if new brake pads need installation.