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4. Procedure
_________ (Ref. Fig. 401/TASK 78-31-41-991-301, 402/TASK 78-31-41-991-302, 403/TASK 78-31-41-991-303, 404/TASK 78-31-41-991-304) R WARNING : DO NOT GET THE FLUID ON YOUR SKIN OR IN YOUR EYES. IF YOU DO:
_______ R - FLUSH IT AWAY WITH CLEAN WATER R - GET MEDICAL AID.
CAUTION : DO NOT PUSH ON THE STOW SWITCH LEVER WHEN BLOCKER DOOR IS OPENED
_______
OR DAMAGE COULD OCCUR.
Subtask 78-31-41-420-050
A. Installation of the Nipples on the Hydraulic Actuator NOTE : You should apply a witness line of finish paint EA4 blue 5991
____ (Material No. CP2245) on all nuts and connections when you have checked their torques.
(1) Remove the blanking plugs from the disconnected line ends.
(2) Lubrication CAUTION : MAKE SURE THERE IS NO UNWANTED MATERIAL IN THE PORTS AND
_______
ORIFICES OR DAMAGE CAN OCCUR.
(a) Lubricate the preformed packing (20) and preformed packing (10) with hydraulic fluid NSA-307-110 type 4 (Material No. CP2212) and install it on the nipple.
(3) Installation of the nipples CAUTION : YOU MUST LUBRICATE UNIONS AND HYDRAULIC TUBES WITH
_______ HYDRAULIC FLUID BEFORE INSTALLATION.
(a) Install the nipples on the hydraulic actuator.
(4) TORQUE the rod nipple to between 260 and 300 lbf.in (2.93 and 3.39 m.daN).
(5) TORQUE the head nipple to between 368 and 411 lbf.in (4.15 and 4.64 m.daN).
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Extension/Retraction Stand-Hydraulic Actuator Rod (HIX3007)
Figure 404/TASK 78-31-41-991-304
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Subtask 78-31-41-869-052
R B. Extend the rod hydraulic actuator with STAND - HYDRAULIC ACTUATOR ROD R (HIX3007).
(1) Install the hydraulic actuator on the extension/retraction stand.
(2) Tighten the actuator with the two knurled bolts.
(3) Remove the spindle from the truck.
(4) Bring the truck to the actuator rod ball joint.
(5) Install the spindle.
(6) Put an appropriate drain can under the hydraulic actuator.
(7) Remove the two plugs from the rod and head nipples.
(8) Turn manually the release square to release the hydraulic actuator secondary lock.
NOTE : The manual release square of the hydraulic actuator will
____ automatically return to the lock (closed) position after the first cycle of the thrust reverser blocker doors.
(9) Deploy the actuator rod of 200 mm (7.87 in.).
(10) Install the plugs on the rod and head nipples.
(11) Remove the spindle.
(12) Untighten the two knurled bolts.
(13) Remove the hydraulic actuator from the extension/retraction stand. Subtask 78-31-41-420-051
C. Installation of the Hydraulic Actuator Clevis
(1) Apply a layer of protective coating blindexite RT 342/2 (Material No. CP2318) on the hydraulic actuator surface in contact with the forward frame.
(2) Installation of the hydraulic actuator. CAUTION : YOU MUST HOLD THE END OF THE HYDRAULIC ACTUATOR WHEN YOU
_______ REMOVE/INSTALL IT. THIS MAKES SURE YOU DO NOT DAMAGE THE RAMP FAIRING.
(a) Install the hydraulic actuator through the forward frame.
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(3) Install the four nuts and bolts which attach the hydraulic actuator on the forward frame.
(4) TORQUE the nuts to between 61 and 70 lbf.in (0.68 and 0.79 m.daN).
(5) Install the hydraulic actuator clevis on the actuator.
R R R R R R CAUTION : ADJUSTMENTS TO THE ROD EYE END OF THE HYDRAULIC ACTUATOR_______ ROD, CAN ONLY BE PERFORMED IN THE SHOP SETTING USING THE FIXTURE PNR Q21806. ON WING ADJUSTMENTS MAY LEAD TO MISSRIGGING OF ACTUATOR AND UNCORRECT LOCK OF THE BLOCKER DOOR. THIS COULD CAUSE THE BLOCKER DOOR TO UNLOCK DURING FLIGHT.
(a) Apply lubricant molykote G rapid (Material No. CP2104) on the pin.
(b) Install the pin, the washer and put the castellated nut on the thread.
(c) Measure the braking torque (A) of the nut.
(d) Torque value
CAUTION : THE TIGHTENING TORQUE MUST BE UNDER OR EQUIVALENT TO 4_______ M.DAN (347 LBF.IN).
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