8-43 TM 9-2320-361-20 8-16. FLEXIBLE HYDRAULIC BRAKE LINE MODIFICATION (Contd) b. Modification 1. Bend bracket (10) tab to a 45ยบ angle. Check bracket (10) for cracks. If cracked, replace bracket (10) and repeat step. 2. Locate and drill 0.46 in. (10.3 mm) hole (17), 0.5 in. (12.7 mm) from bracket corners (16).