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29-00-00-864-001 Put the Related Hydraulic System in the Depressurized
Configuration before Maintenance Action 29-00-00-910-002 Safety Procedures of the Hydraulic System 29-14-00-614-001 Depressurization of the Hydraulic Reservoirs 29-14-00-614-002 Pressurization of the Hydraulic Reservoirs through
the Ground Connector 29-14-16-991-001 Fig. 401
3. Job Set-up
__________
Subtask 29-14-16-860-055
A. Aircraft Maintenance Configuration
WARNING : OBEY THE HYDRAULIC SAFETY PROCEDURES.
_______
(1)
Obey the hydraulic safety procedures (Ref. TASK 29-00-00-910-002).
(2)
Make sure that the warning notices are in position to tell persons not to pressurize the Yellow hydraulic system:
-in the cockpit on the hydraulic section 40VU of the overhead panel, - on the ground service panel of the Yellow hydraulic system.
(3)
Make sure that the Yellow hydraulic system is depressurized and put it in the maintenance configuration. (Ref. TASK 29-00-00-864-001).
(4)
Make sure that the reservoir of the Yellow hydraulic system is depressurized (Ref. TASK 29-14-00-614-001).
(5)
Make sure that the access panels 198CB and 198DB are removed.
Subtask 29-14-16-865-055
B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------
121VU HYDRAULIC/HYD POWER/Y 3803GX N30 123VU Y HYD/ELEC/PUMP 3802GX AB06 R 123VU Y HYD/ELEC/ELEC PUMP/NORM 3801GX AB03
4. Procedure
_________
(Ref. Fig. 401/TASK 29-14-16-991-001)
Subtask 29-14-16-560-052
A. Preparation of the Replacement Component
WARNING : USE SOLVENTS/CLEANING AGENTS, SEALANTS AND OTHER SPECIAL
_______ MATERIALS ONLY WITH A GOOD SUPPLY OF AIR. OBEY THE MANUFACTURERS INSTRUCTIONS. PUT ON PROTECTIVE CLOTHING. DO NOT GET THEM IN YOUR MOUTH. DO NOT SMOKE. DO NOT BREATHE THE GAS. THESE MATERIALS ARE POISONOUS, FLAMMABLE AND SKIN IRRITANT. GET MEDICAL HELP IF YOUR SKIN OR EYES BECOME IRRITATED.
(1)
Remove the parts which are attached to the removed depressurization valve as follows:
(a)
Hold the depressurization valve (4) and remove the reducer (2).
(b)
Remove and discard the O-ring (3).
(c)
Put blanking plugs on the reducer (2) and the depressurization valve (4).
(2)
Install the removed parts on the depressurization valve as follows:
(a)
Remove the blanking plugs from the depressurization valve (4) and the reducer (2).
(b)
Lubricate the threads of the reducer (2) and the O-ring (3) with HYDRAULIC FLUIDS (Material No. 02-003).
(c)
Put the O-ring (3) in position on the reducer (2).
(d)
Install the reducer (2).
(e)
TORQUE the reducer (2) to between 3.20 and 3.50 m.daN (23.59 and
25.81 lbf.ft).
(3)
Make sure that the contact surface of the depressurization valve (4) and the ground service panel is clean.
(4)
Apply SEALANTS (Material No. 09-015) to the contact surface of the depressurization valve (4).
(5)
Apply SPECIAL MATERIALS (Material No. 05-002) to the bolts (5). Subtask 29-14-16-420-052
B.
Installation of the Reservoir Depressurization Valve CAUTION : USE A SECOND WRENCH TO APPLY COUNTERTORQUE TO THE UNION WHEN
_______ YOU DISCONNECT/CONNECT HYDRAULIC LINES ON UNIONS. IF YOU USE THE SECOND WRENCH, YOU WILL NOT LOOSEN OR TIGHTEN THE UNION TOO MUCH.
CAUTION : YOU MUST INSTALL HYDRAULIC TUBES WITH HYDRAULIC FLUID AS
_______
LUBRICANT.
(1)
Clean the component interface and/or the adjacent area.
(2)
Do an inspection of the component interface and/or the adjacent area.
(3)
Install the depressurization valve (4) in the ground service panel.
(4)
Install the bolts (5) and the nuts (6) and tighten them.
(5)
Apply STRUCTURE PAINTS (Material No. 16-003) to the sealant around the depressurization valve (4).
(6)
Make sure that the hydraulic line end-fittings are serviceable.
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