TM 9-2320-361-20 6-4. FRONT-WHEEL DRIVE LOCK-lN SWITCH MAINTENANCE (Contd) 1. For fabrication of air lines, refer to TM 9-243. 2. For schematic representation of air line locations and routings see Appendix E of this manual. e. Line Installation 1. Install elbow (22) on frame crossmember (23) with two screws (18) and new locknuts (14). 2. Install elbow (16) on air cylinder (15). 3. Install hose (17) on elbow (16). 4. Install adapter (19) on elbow (22). 5. Install hose (17) on adapter (19). 6. Install adapter (20) on elbow (22). 7. Install new sleeve (21) and line (7) on adapter (20). 8. Install line (7) on frame (11) with clamp (13), screw (24), and new locknut (12). 9. Install line (7) on firewall (1) with clamp (10) and screw (9). 10. Install adapter (4), washer (5), and new locknut (6) on firewall (1). 11. Install new sleeve (8) and line (7) on adapter (4). 12. Install new sleeve (3) and line (2) on adapter (4). 6-16