TM 55-1520-240-23-6
7-123.2
CHECK PIVOTING AND SWIVELING SERVOCYLINDER CONTROL VALVES FOR
LEAKAGE
(Continued)
7-123.2
4.
Have helper in cockpit press CENTERING
DEVICE RELEASE switch (7) on copilots stick
(8). Move stick approximately 2 inches left then
2 inches right of neutral stick position at a rate
of 20 to 25 cycles per minute.
5.
When leakage at valve shaft (5) is 1 drop, check
leakage rate for minimum of 6 minutes. Leakage
rate must not be more than 4 drops per 25
cycles.
6.
Stop moving controls when leakage rate is
measured.
7.
Position stick (8) at neutral. Release switch (7).
7-548