TM 55-1520-240-23-6
7-16.1
FLUSHING SERIOUSLY CONTAMINATED FLIGHT CONTROL OR UTILITY HYDRAULIC
SYSTEMS
(Continued)
7-16.1
63.
Set hook select switch (36) in cockpit to MID.
63.1.
Set MASTER switch (39) to ARM.
64.
Press and release pilot’s CARGO HOOK
RELEASE switch (37) on cyclic stick grip (38).
65.
Set MASTER switch (39) to RESET, then to ARM.
66.
Repeat steps 64 and 65 three times.
67.
Reduce external hydraulic pressure to 500 psi.
68.
Disconnect hydraulic hose (40) from cargo hook
(35). Position hose in container (30).
69.
Repeat step 64.
70.
After approximately 1 gallon of fluid has drained,
repeat step 65.
71.
Connect hose (40) to cargo hook (35). Leave
nut (41) loose.
72.
Repeat step 64. Allow fluid to flow at nut (41)
until air free. Tighten nut. Use cloths (E120) to
catch spilled fluid. Wear gloves (E186).
73.
Set MASTER switch (39) to OFF.
74.
Increase external hydraulic pressure to 3,000
psi.
7-115
