4. Procedure
_________
(Ref. Fig. 426/TASK 78-31-49-991-327) Subtask 78-31-49-020-097
A. Removal of the Rod Supply Junction Pipe
(1) Put a container 1 USgal (4 L) under the lower hydraulic actuator.
(2) Disconnect the lower rod supply hose from the actuator and let the hydraulic fluid drain into the container.
(3) Connect the lower rod supply hose to the actuator.
(4) TORQUE the coupling nut to between 130 and 150 lbf.in (1.46 and 1.69 m.daN).
NOTE : Apply a witness line of finish paint EA4 blue 5991 (Material
____ No. CP2245) on the nut and connection after they are torqued.
(5) Remove the nuts and the bolts that attach the double flange and the upper half clamps to the double hydraulic line bracket.
(6) Loosen the bottom bolt that attach the upper half clamp to the middle hydraulic line bracket. Remove the top bolt and the upper head shield.
(7) Remove nuts and bolts that attach the lower head shield to the forward frame.
(8) Disconnect the rod supply pipe from the middle hydraulic line bracket.
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Rod Supply Junction Pipe
Figure 426/TASK 78-31-49-991-327- 12 (SHEET 1)
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Rod Supply Junction Pipe
Figure 426/TASK 78-31-49-991-327- 22 (SHEET 2)
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(9) Remove the nut that attach the rod supply junction pipe to the middle hydraulic line bracket.
(10) Disconnect the upper rod supply hose from the upper rod swivel joint.
(11) Disconnect the rod supply junction pipe from the lower rod swivel joint.
(12) Remove the swivel joint from the rod supply junction pipe.
(13) Remove and discard the packing (20).
(14) Put protective covers on the pipe ends.
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TASK 78-31-49-400-040
Installation of the Rod Supply Junction Pipe
WARNING : WEAR A FACE SHIELD WHICH IS RESISTANT TO HIGH PRESSURE JETS WHEN YOU
_______
WORK ON PRESSURIZED SYSTEMS.
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 : USE 2 WRENCHES TO REMOVE OR INSTALL THE TUBE COUPLING NUTS.
_______
ONE WRENCH TO HOLD THE UNION AND ONE TO LOOSEN OR TIGHTEN THE
COUPLING NUT. THIS WILL PREVENT DAMAGE TO THE HARDWARE.
CAUTION : MAKE SURE THERE IS NO UNWANTED MATERIAL IN THE PORTS AND ORIFICES OR
_______
DAMAGE CAN OCCUR.
CAUTION : YOU MUST INSTALL HYDRAULIC TUBES WITH HYDRAULIC FLUID AS LUBRICANT.
_______
1. Reason for the Job
__________________
Self Explanatory
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific warning notice
No specific access platform 1 m (3 ft. 3 in.) R No specific Torque Wrench : range 5.00 to 35.00 lbf.in R (0.05 to 0.40 m.daN)
No specific Torque Wrench : range 36.00 to 220.00 lbf.in
(0.40 to 2.60 m.daN)
No specific Torque Wrench : range 96.00 to 900.00 lbf.in
(1.00 to 10.00 m.daN)
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B. Consumable Materials
-------------------------------------------------------------------------------
REFERENCE DESIGNATION
-------------------------------------------------------------------------------
Material No. CP2245 *
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