SDC INSTALLATION continued - TM-1-1520-238-23-4

SDC INSTALLATION continued - TM-1-1520-238-23-4_1163

TM-1-1520-238-23-4 Helicopter Attack AH-64A Apache (NSN 1520-01-106-9519) (EIC: RHA) Manual
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TM 1-1520-238-23 7-470 7.121. SDC INSTALLATION – continued k. Install interconnect hose (17) and surge valve pressure hose (18) on unions (1) and (4). (1) Lubricate threads of unions (1) and (4). Use damping fluid (item 69, App F). (2) Hold union (1). Install nut (19). (3) Hold union (4). Install nut (20). CAUTION Ensure surge valve pressure hose is not kinked or twisted after installation. Failure to do so could cause SDC malfunction. l. Install exhaust hose (21) on surge valve (22). (1) Install clamp (23). m. Slide housing (10) over SDC (2). (1) Install clamp (11). n. Inspect (QA). o. Install SDC pressure outlet hose (para 7.127). p. Install SDC temperature sensor (para 7.123). q. Perform pressurized air system maintenance operational check (TM 1-1520-238-T). r. Unfold catwalk (para 2.83). s. Service main transmission (para 1.32). t. Secure access doors T250L, T250R, T290L, T290R, and L325 (para 2.2). END OF TASK 1 19 11 10 21 17 23 22 18 20 4 2 M04-069-9

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