TM 1-1520-238-T-5
7–63
7–10.
PRIMARY HYDRAULIC SYSTEM – MAINTENANCE OPERATIONAL CHECK (cont)
7–10
Task
Result
s. Slowly push pilot collective stick to full down
position to extend piston.
t. Have assistant measure and record cylinder
stroke. Use inside calipers. Measurement B
is from bottom of jam nut to top surface of
servocylinder housing (cylinder retracted).
u. Subtract measurement A from B. Cylinder
travel is 3.500 to 3.560 inches.
If cylinder does not travel full stroke, go to step af.
v. Slowly push pilot cyclic stick to full left
position to retract lateral servocylinder
piston.
w. Have assistant measure and record cylinder
stroke. Use inside calipers. Measurement A
is from bottom of jam nut to top surface of
servocylinder housing (cylinder retracted).
x. Slowly pull pilot cyclic stick to full right
position to extend piston.
y. Have assistant measure and record cylinder
stroke with inside calipers. Measurement B
is from bottom of the jam nut to top surface
of the servocylinder housing (cylinder
extended).
z. Subtract measurement A from B. Cylinder
travel is 3.500 to 3.560 inches.
If cylinder does not travel full stroke, go to step af.
aa. Slowly push pilot right directional pedal to
full right position to retract directional
servocylinder piston.
ab. Have assistant measure and record cylinder
stroke with inside calipers. Measurement A
is from bottom of the jam nut to top surface
of the servocylinder housing (cylinder
retracted).
ac. Slowly push pilot left directional pedal to full
left position to extend piston.
ad. Have assistant measure and record cylinder
stroke with inside calipers. Measurement B
is from bottom of the jam nut to top surface
of the servocylinder housing (cylinder
extended).
