AT-108 5. CHECK PACK CLEARANCE OF FIRST AND REVERSE BRAKE Using a feeler gauge, measure the clearance between the plate and second brake drum. Clearance: 0.60 - 1.12 mm (0.0236 - 0.0441 in.) If the values are non-standard, select another flange. HINT: There are 6 different thicknesses for the flange. Flange thickness mm (in.) No. Thickness No. Thickness 50 5.0 (0.197) 53 4.4 (0.173) 51 4.8 (0.189) 54 4.2 (0.165) 52 4.6 (0.181) 55 4.0 (0.157) AT8223