W250 3/4 Ton Pickup 4WD V8-318 5.2L VIN T 2-BBL (1983)
Fig 6 Removing Caliper Support Key
4. Remove the key retaining screw and use a brass rod and light hammer to drive out the caliper support key and caliper support spring.
NOTE: It is not necessary to disconnect the hydraulic line to the caliper; thus, it should not be necessary to bleed the brakes after the new shoes
and linings are installed.
Fig 7 Removing Outboard Shoe From Caliper
5. Remove the caliper from the adaptor and tap or pry the outer shoe and lining from the caliper.
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Hang the caliper from a heavy wire or support on the front suspension.
CAUTION: Do not let the caliper hang with the weight of the caliper on the brake hose.