Brake Booster Piston Rod: XL-7
Length of brake booster piston rod is adjusted to provide zero clearance between brake booster piston rod and master cylinder piston. Remove vacuum brake booster from vehicle. See POWER BRAKE BOOSTER under REMOVAL & INSTALLATION. Push piston rod several times to ensure reaction disc is in place. Measure distance between piston rod and mating surface of booster. See Fig 1. Depth should be .623-.653" (15.8-16.6 mm). Adjust by turning adjusting screw of booster piston rod using Special Tool (09952-16021). See Fig 1.