Medium and Heavy Trucks
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Hi, my name is***** will be glad to help. The likely cause is the caliper piston sticking or the caliper slides. Remove the wheels and try to retract the pistons manually using a large C clamp or piston retraction tool. If any will not retract easily replace the caliper. also clean the caliper slides as well or put hardware kits in them. Let me know the results. If that checks ok then you are looking at a possible booster and master cylinder problem as you suspected causing pressure to hold the brakes slightly applied.
Hi, Did you get this resolved or still need more help?
Thanks for the update. Pleasure to help