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TM-9-2320-361-24-2 Page 766

TM-9-2320-361-24-2 Field Maintenance Manual Volume 2 for M44A2 Series Trucks

Page 766 of 1144


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TM 9-2320-361-24-2 0407 00 0407 00-2 AIR BRAKE CHECK VALVE, PRESSURE SWITCH, AND AIR LINE REPLACEMENT (Contd) REMOVAL WARNING • Do not disconnect air lines before draining air reservoirs. Small parts under pressure may shoot out with high velocity, causing injury to personnel. • Eyeshields must be worn when releasing compressed air. Failure to do so may result in injury to personnel. CAUTION When disconnecting air lines and hoses, plug all openings to prevent dirt from entering and causing damage to internal parts. Remove plugs prior to installation. NOTE Prior to removal, tag air lines for installation. 1. Disconnect two leads 75 (46) of air brake electrical harness (1) from pressure switch (45). 2. Remove four tiedown straps (21) from air lines (2), (7), (9), (20), and (30). Discard tiedown straps (21). 3. Loosen nuts (3), (8), (29), and (37) and remove air lines (2), (7), (9), and (30) with inserts (44), (40), (36), and (28), from elbows (43) and (38) and tee (35). 4. Loosen nut (31) and remove air line (30), with inserts (32), from elbow (33). 5. Remove locknut (39), screw (41), and check valve (42) from crossmember (4). Discard locknut (39). 6. Remove elbows (38) and (43) from check valve (42). 7. Remove tee (35) from check valve (42). 8. Remove two locknuts (6), washers (5), screws (34), and pressure switch (45) from crossmember (4). Discard locknuts (6). 9. Remove elbow (33) from pressure switch (45). 10. Loosen nut (19) and remove air line (20), with insert (18), from elbow (16). 11. Remove elbow (16) from check valve (17). 12. Loosen nuts (10) and (14) and remove air lines (9) and (15), with inserts (11) and (13), from union (12). 13. Loosen nuts (22) and (26) and remove air lines (7) and (27), with inserts (23) and (25), from union (24). INSTALLATION 1. Apply adhesive to male threads of elbows (16), (33), (38), and (43), unions (12) and (24), and tee (35). 2. Install air lines (7) and (27), with inserts (23) and (25), on union (24) and tighten nuts (22) and (26). 3. Install air lines (9) and (15) with inserts (11) and (13) on union (12) and tighten nuts (10) and (14). 4. Install elbow (16) on check valve (17). 5. Install air line (20), with insert (18), on elbow (16) and tighten nut (19). 6. Install elbow (33) on pressure switch (45).