(2)
Make sure that the reservoir of the Green hydraulic system is depressurized (Ref. TASK 29-14-00-614-001).
(3)
In the cockpit, on the panel 400VU, make sure that the warning notice(s) is (are) in position to tell persons not to operate the landing gear control lever.
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(4)
Make sure that the warning notice(s) is (are) in position to tell persons not to pressurize the Green hydraulic system: - on the panel 40VU in the cockpit, - on the ground service panel of the Green hydraulic system, access
door (197CB).
(5)
Make sure that the safety barriers are in position.
(6)
Make sure that the container is in position below the NLG door ground opening bypass valve (2533GM).
(7)
Make sure that the doors of the nose landing gear are open (Ref. TASK 32-22-00-010-001).
4. Procedure
_________
(Ref. Fig. 401/TASK 32-31-15-991-001)
Subtask 32-31-15-110-050
A. Preparation for Installation
(1) Clean the mating surfaces and the junction components with CLEANING AGENTS (Material No. 11-002). Dry them with dry, filtered compressed air.
R (2) Apply a thin layer of COMMON GREASE (Material No. 04-022) to the nuts and bolts, specially the bolt (21).
Subtask 32-31-15-420-051
B. Installation of the NLG Door Ground Opening Bypass Valve WARNING : MAKE SURE THAT THE NLG DOWNLOCK SAFETY PIN AND THE TWO DOOR
_______
SAFETY PINS ARE INSTALLED.
(1)
Put the selector valve (7) in position.
(2)
Install the bolts (14), the washers (6) and the nuts (4).
(3)
TORQUE the nuts (4) to between 0.3 and 0.35 m.daN (26.54 and 30.97 lbf.in) and safety them with the new cotter pin (5).
(4)
Install the reducers (2) and (12) with the new packing (3) and the new packing (13).
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(5)
TORQUE the reducers (2) and (12) to between 1.63 and 1.75 m.daN
(12.02 and 12.90 lbf.ft).
(6)
Install the restrictor (9) with the new packing (8).
(7)
TORQUE the restrictor (9) to between 1.63 and 1.75 m.daN (12.02 and
12.90 lbf.ft).
(8)
Remove the blanking plugs and connect the hydraulic lines (1), (10) and (11).
(9)
TORQUE the hydraulic lines (1), (10) and (11) to between 1.5 and 1.7 m.daN (11.06 and 12.53 lbf.ft).
(10) Install the lever (23), the screw (24), the washer (20) and the nut
(19). TORQUE the nut (19) to between 0.7 and 0.8 m.daN (61.94 and R 70.79 lbf.in) and safety it with the new cotter pin (18).
Subtask 32-31-15-420-052
C. Connection of the Rod (17)
(1) Install the RIGGING PIN (98A32301013000) (21) on the selector valve (7). This configuration agrees with the DOORS CLOSED position.
NOTE : You can only move the selector valve (7) from the DOORS OPEN
____ position to the DOORS CLOSED position if the Green hydraulic system is pressurized. (Ref. TASK 29-10-00-863-001)
(2)
Put the control lever in the closed position with the safety pin in position.
(3)
Cut and remove the lockwire from the rod (17).
(4)
Loosen the nuts (15) and release the washers (16).
(5)
Install the bolt (22). To do this, adjust the length of the rod (17).
(6)
TORQUE the nuts (15) to 0.59 m.daN (52.21 lbf.in) safety them with lockwire corrosion resistant steel dia. 0.8 mm (0.03 in).
(7)
Put the rod (17) in position and install the bolt (21).
(8)
Install the washer (25) and the nut (26).
(9)
TORQUE the nut (26) to between 0.7 and 0.8 m.daN (61.94 and 70.79 lbf.in) and safety it with the new cotter pin (27).
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(10)
Remove the RIGGING PIN (98A32301013000) (21). Subtask 32-31-15-941-052
D. Preparation for the Test
(1)
Make sure that the work area is clean and clear of tool(s) and other items.
(2)
Remove the safety pin from the door ground-opening handle.
(3)
Put the door ground-opening handle in the OPEN position.
(4)
Install the safety pin on the handle.
(5)
Remove the container below the NLG door ground opening bypass valve (2533GM).
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