(10)
Do the step (9) again until the hydraulic fluid from the bleed hose
(21) contains no air. (There are no bubbles in the fluid).
(11)
Use the axle jack to fully compress the shock absorber.
(12)
Keep the shock absorber compressed and the hydraulic pressure released.
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(13)
Disconnect the hydraulic supply hose (25) from the three-way valve (19).
(14)
Loosen the elbow fitting (18) at the filler adaptor (17) and let the hydraulic fluid drain into the drain container (22).
(15)
Remove the elbow fitting (18) from the filler adaptor (17).
(16)
Close the control valve (20) and remove the bleed hose (21) and the drain container (22).
(17)
Remove the filler adaptor (17).
(18)
Install a new packing (5) to the top charging valve assembly (4).
(19)
Install the charging valve assembly (4) in the top charging valve port.
(20)
TORQUE the body of the top charging valve (4) to between 1.13 and
1.58 m.daN (99.99 and 139.82 lbf.in).
(21)
Safety the body of the charging valve (4) with MISCELLANEOUS (Material No. 19-010).
(22)
Make sure that the bottom charging valve (1) and the top charging valve (4) are closed.
(23)
Install the blanking cap (2) on the bottom charging valve (1).
(24)
Install the blanking cap (3) on the top charging valve (4).
(25)
Lower and remove the axle jack.
(26)
Do the nitrogen filling of the MLG two-stage shock absorber (aircraft on jacks) (Ref. TASK 12-14-32-614-003).
(27)
Make a note in the aircraft log:
-it is recommended that you do a weight on wheels pressure 'H' dimension check (Ref. TASK 12-14-32-200-001), not less than 24 hours after you lower the aircraft off the jacks.
NOTE : New hydraulic fluid can absorb nitrogen.
____
Shock absorber nitrogen pressure can decrease.
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5. Close-up
________ Subtask 12-12-32-586-053
A. Lower the Aircraft
(1)
Make sure that the work area is clean and clear of tool(s) and other items.
(2)
Remove the access platform(s).
(3) Lower the aircraft on its wheels (Ref. TASK 07-11-00-586-002). Subtask 12-12-32-942-067
B. Remove the Equipment
(1)
Remove the warning notice(s).
(2)
Remove the ground support and maintenance equipment, the special and standard tools and all other items.
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TASK 12-12-32-611-006
Replenishment of the MLG Torque Link Damper
WARNING : PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU
_______
START A TASK ON OR NEAR:
-
THE FLIGHT CONTROLS
-
THE FLIGHT CONTROL SURFACES
-
THE LANDING GEAR AND THE RELATED DOORS
-COMPONENTS THAT MOVE.
WARNING : MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING
_______
GEAR.
WARNING : OBEY THE HYDRAULIC SAFETY PROCEDURES.
_______
1. Reason for the Job
__________________
Self Explanatory
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific approved AN connector No specific bleed pipe No specific hydraulic ground cart No specific hydraulic source, minimum supply pressure 50 PSI No specific safety barriers No specific spatula, non-metallic No specific warning notice No specific container 2 l (0.5283 USgal)
R No specific Torque Wrench : range 0.00 to 1.20 m.daN R (0.00 to 9.00 lbf.ft) R
460006804 1 BLEED ADAPTOR
B. Consumable Materials
-------------------------------------------------------------------------------
REFERENCE DESIGNATION
-------------------------------------------------------------------------------
No specific lockwire, corrosion resistant steel 0.8mm (0.032in.) dia.
R Material No. 02-003 F NSA 307110 TYPE 4 HYDRAULIC FLUID (PHOSPHATE ESTER BASE) (Ref. 20-31-00) Material No. 09-016 USA MIL-PRF-81733D TYPE II CLASS B CORROSION INHIBITING FILLET CONSISTENCY (Ref. 20-31-00) Material No. 11-003 USA ASTM D 740 METHYL-ETHYL-KETONE (Ref. 20-31-00) Material No. 19-003 USA AMS 3819 LINT-FREE COTTON CLOTH (Ref. 20-31-00)
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