TM 55-1520-240-23-6
7-123.2
CHECK PIVOTING AND SWIVELING SERVOCYLINDER CONTROL VALVES FOR
LEAKAGE
(Continued)
7-123.2
NOTE
Procedure is same to check forward or
aft, pivoting or swiveling servocylinder
control valves. Check of pivoting
servocylinder control valve is shown
here.
Pressurize both flight control systems
to 2600 to 3000 psi. Allow hydraulic
system temperature to stabilize for
approximately 20 minutes.
1.
Working from forward right work platform, cut top
strap (1) from input shaft housing boot (2). Use
diagonal cutting pliers. Remove strap.
NOTE
A combination of allowable static and
dynamic leakage may cause hydraulic
fluid to leak from 3 drain holes in the
boot.
2.
Turn top of boot (2) inside-out. Roll down over
lower boot strap (3) and input link (4).
3.
Check valve shaft (5) and inside surface (6) of
boot (2). Clean fluid from shaft and boot. Use
cloths (E135) to dry surfaces. Wear gloves
(E186).
7-547
