TM 55-1520-240-23-6
7-7
HYDRAULIC SYSTEMS LEAKAGE GENERAL INFORMATION
(Continued)
7-7
Task 7-283.5 TEST CARGO DOOR PRESSURE
ACTUATED VALVE.
Task 7-288 TEST CARGO DOOR ACTUATOR
MOTOR (AVIM).
Task 7-313 TEST SWIVEL LOCK ACTUATOR
(AVIM).
NOTE
Due to allowable static and dynamic
leakage of pivoting and swiveling
actuators (145H6600 and 145H6700
series), hydraulic fluid may leak
from the input shaft rubber boot
(145HS003) during actuator
operation. The allowable static
leakage for actuator control valve
assemblies is 2 drops per minute
per actuator. The allowable dynamic
leakage for actuator control valve
assemblies is 4 drops per 25 cycles
per actuator. One cycle equals one
full extension and retraction of the
actuator.
A combination of dynamic leakage
during operation and static leakage
may cause hydraulic fluid to leak
from the rubber boot around the
input shaft housing. This condition
alone is not cause for replacing an
actuating cylinder. See Task 7-123.2
for leakage criteria.
FOLLOW-ON MAINTENANCE:
As Required
NO BREAK - WORK HARDER
NO BREAK - WORK HARDER
END OF TASK
7-53
