TM 9-2320-361-20 8-36. TRAILER PROTECTION VALVE REPLACEMENT This task covers: a. Removal b. Installation INITIAL SETUP: APPLICABLE MODELS M275A2 MATERIALS/PARTS Two locknuts Antiseize tape (Appendix C, Item 27) REFERENCES [TM] TM 9-2320-361-10 TM 9-2320-361-20P EQUIPMENT CONDITION Parking brake set (TM 9-2320-361-10). Air reservoirs drained (TM 9-2320-361-10). GENERAL SAFETY INSTRUCTIONS Do not disconnect air lines before draining air reservoirs. a. 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. NOTE Tag air lines and hoses for installation. 1. Remove service trailer brake line (1) from elbow (2). 2. Remove emergency trailer brake line (6) from elbow (3). 3. Remove brake signal air line (11) from elbow (10). 4. Remove air reservoir air line (8) from elbow (9). 5. Remove two locknuts (4), screws (12), and trailer protection valve (7) from bracket (5). Discard locknuts (4). 6. Remove four elbows (2), (3), (9), and (10) from trailer protection valve (7). NOTE Wrap all male pipe threads with antiseize tape before installation. 1. Install four elbows (10), (9), (3), and (2) on trailer protection valve (7). 2. Install trailer protection valve (7) on bracket (5) with two screws (12) and new locknuts (4). 3. Install air reservoir air line (8) on elbow (9). 4. install brake signal air line (11) on elbow (10). 5. Install emergency trailer brake line (6) on elbow (3). 6. Install service trailer brake line (1) on elbow (2). 8-86