The Master Piston Holding Wedge prevents rotation of the master piston during adjustment procedures by maintaining controlled positioning. The wedge is inserted between the master piston and the exhaust rocker arm adjustment screw to hold the piston in place. Pushing the wedge until the piston bottoms in the bore ensures stable engagement during the adjustment process. Controlled positioning allows trigger adjustments to be completed without unintended piston movement.Attributes:• Prevents rotation of the master piston during adjustment procedures.• Maintains stable piston positioning while trigger settings are applied.• Supports controlled engagement between the piston and adjustment components.Applications:The Master Piston Holding Wedge is applied during brake service, where it holds the master piston stationary to allow controlled trigger adjustments without piston rotation.