Retraction of the Landing Gear 51-75-13-916-002 Repair to a layer of Corrosion Preventive Compound 32-31-37-991-001 Fig. 401
 3. Job Set-up
__________
 Subtask 32-31-37-860-051
 A. Aircraft Maintenance Configuration
 (1)
 Make sure that PTU isolation coupling is disconnected (Ref. TASK 29-23-00-860-001).

 (2)
 Make sure that the aircraft electrical circuits are energized (Ref. TASK 24-41-00-861-002)

 (3)
 Make sure that the flight configuration precautions were obeyed (Ref. TASK 32-00-00-860-001).

 (4)
 Make sure that the Green hydraulic system is depressurized (Ref. TASK 29-10-00-864-001).

 (5)
 Make sure that the reservoir of the Green hydraulic system is depressurized (Ref. TASK 29-14-00-614-001).

 Subtask 32-31-37-865-051
 B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU L/G/LGCIU/SYS1/NORM 1GA C09 121VU HYDRAULIC/LGCIU/SYS2 2GA Q35 121VU HYDRAULIC/LGCIU/SYS1/GRND SPLY 52GA Q34 121VU HYDRAULIC/G HYD/PUMP ENG1/CTL 1701GK R35 121VU HYDRAULIC/G HYD/PUMP ENG1/MONG 1702GK R34
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 Subtask 32-31-37-941-051
 C. Safety Precautions
 (1) Make sure that the warning notices 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.
 Subtask 32-31-37-560-050
 D. Preparation of the Replacement Component
 (1) Remove the blanking plugs. 
R R R R  (2) Apply HYDRAULIC FLUIDS (Material No. 02-003), HYDRAULIC FLUIDS (Material No. 02-00A), HYDRAULIC FLUIDS (Material No. 02-003B), HYDRAULIC FLUIDS (Material No. 02-003C) or HYDRAULIC FLUIDS (Material No. 02-003D) to: - the threads of the check valve (3), - the threads of the reducer (5), - the new packing (4).
 (3) Put the packing (4) on the check valve (3).
 (4) Install the check valve (3) in the reducer (5).
 (5) TORQUE the check valve (3) to between 4.32 and 4.61 m.daN (31.85 and 33.99 lbf.ft).
 Subtask 32-31-37-560-051
 E. Preparation for Installation
 (1) Clean the component interface and/or the adjacent area.
 (2) Do an inspection of the component interface and/or the adjacent area.
 (3) Make sure that the parts retained from the removed component are clean and in the correct condition.

 4. Procedure
_________
 (Ref. Fig. 401/TASK 32-31-37-991-001) Subtask 32-31-37-420-050
 A. Installation of the Check Valve 2748GM
 (1)
 Obey the hydraulic safety procedures (Ref. TASK 29-00-00-910-002).

 (2)
 Remove the blanking plugs.

 (3)
 Put the reducer (5) and the check valve (3) in position and tighten the connectors (1), (2) and (6).

 (4)
 TORQUE the connector (1) to between 9.7 and 10.7 m.daN (71.53 and

 78.90 lbf.ft).

 (5)
 TORQUE the pipes (2) and (6) to between 5.4 and 5.9 m.daN (39.82 and

 43.51 lbf.ft).

 (6)
 Mark the connections with PAINTS FOR DETAIL (INTERNAL AND EXTERN AL) (Material No. 07-010).

 Subtask 32-31-37-865-052
 B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 1GA, 2GA, 52GA, 1701GK, 1702GK
 Subtask 32-31-37-860-052
 C. Preparation for Test
 (1)
 Connect the PTU isolation coupling (Ref. TASK 29-23-00-860-002).

 (2)
 If the flight configuration precautions were obeyed, put the aircraft back to the serviceable condition (Ref. TASK 32-00-00-860-002).

 (3)
 Remove the container.

 (4)
 Remove the warning notice(s).

 (5)
 Remove the access platform(s).

 (6)
 Close the left MLG door (Ref. TASK 32-12-00-410-001).

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 (7) If necessary fill the reservoir of the Green hydraulic system to the

 correct level (Ref. TASK 12-12-29-611-001). Subtask 32-31-37-720-050
 D. Do the functional test of the normal extension and retraction system (Ref. TASK 32-31-00-720-002).
 (1)
 Open the left MLG door (Ref. TASK 32-12-00-010-001).