TM 1-1520-238-23 Change 9 7-106.1 7.31. HYDRAULIC HAND PUMP FUNCTIONAL CHECK (AVIM) – continued f. Perform displacement test. (1) Place pump handle (19) in the up position. (2) Move lever (8) to fill utility accumulator posi- tion B. (3) Remove check valve line (18) from PRI RES port (7). (4) Pull pump handle (19) down and move lever (8) simultaneously to position C fill primary reservoir . (5) Position graduated glass cylinder under PRI RES port (7). Use 100-mL cylinder. (6) Operate pump handle (19) 10 full strokes stop to stop. Volume pumped into glass cylin- der should be a minimum of 57 CC. (7) Install cap (6) on PRI RES port (7). g. Perform external leakage test. (1) Remove cap (13) from UTIL RES port (14). (2) Remove nonpressurized hydraulic fluid sup- ply line (17) from FILL port (11) and install on UTIL RES port (14). (3) Install cap (10) on FILL port (11). (4) Remove cap (15) from UTIL ACC port (16). (5) Install check valve line (18) on UTIL ACC port (16). (6) Move lever (8) to fill utility accumulator posi- tion B. (7) Operate pump handle (19) 25 full strokes stop to stop. Flow should occur at UTIL ACC port (16). Maximum external leakage 1 DROP. GO TO NEXT PAGE C B 19 7 18 8 NON-PRESSURE LINE 6 UTIL RES PRI RES UTIL ACC FILL M04-2678-20 19 15 17 11 14 16 13 NON-PRESSURE LINE CHECK VALVE LINE 17 10 18 UTIL RES PRI RES UTIL ACC FILL M04-2678-17