(4)
Make sure that the pressure on the gauge 2585GM decreases to the fill pressure of the accumulator 2582GM (Ref. TASK 32-44-11-200-001).
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B. Get Access
(1) Open the right MLG door (Ref. TASK 32-12-00-010-001).
Subtask 32-45-51-869-051
C. disconnection of the PTU Isolation Coupling
(1)
Depressurize the reservoir of the Yellow hydraulic system (Ref. TASK 29-14-00-614-001).
(2)
Disconnect the PTU isolation coupling (Ref. TASK 29-23-00-860-001).
(3)
Put the access platform in position.
(4)
Put the container below the control valve 72GG to collect hydraulic fluid leakage.
Subtask 32-45-51-865-050
D. Open, safety and tag this(these) circuit breaker(s):
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU L/G/Y BRK/PRESS/IND 61GG C10 121VU HYDRAULIC/BRAKING AND STEERING/SYS2/SPLY 4GG M36 121VU HYDRAULIC/BRAKING AND STEERING/SYS2/CTL 3GG M35 121VU HYDRAULIC/BRAKING AND STEERING/SYS1/CTL 1GG M34 121VU HYDRAULIC/BRAKING AND STEERING/SYS1/IND AND/SPLY 2GG M33 121VU HYDRAULIC/PARK BRK/CTL/STBY 71GG N37 121VU HYDRAULIC/PARK BRK/CTL/NORM 70GG N36 121VU HYDRAULIC/HYD POWER/Y 3803GX N30 121VU HYDRAULIC/Y HYD/PUMP ENG2/MONG 3700GD Q37 121VU HYDRAULIC/Y HYD/PUMP ENG2/CTL 3701GD Q36 123VU Y HYD/ELEC/PUMP 3802GX AB06 123VU Y HYD/ELEC/ELEC PUMP/NORM 3801GX AB03
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E. Safety Precautions
(1) Put the warning notices in position to tell persons not to pressurize the Yellow hydraulic system: - on the panel 40VU in the cockpit, - on the ground service panel of the Yellow hydraulic system.
4. Procedure
_________
**ON A/C 001-049, 051-099, 101-149, 201-299,
(Ref. Fig. 401/TASK 32-45-51-991-001)
**ON A/C 151-199, 301-399,
(Ref. Fig. 401A/TASK 32-45-51-991-001-A) R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399,
Subtask 32-45-51-020-050
A. Removal of the Parking-Brake Electrical Control-Valve 72GG
WARNING : OBEY THE HYDRAULIC SAFETY PROCEDURES.
_______
(1)
Obey the hydraulic safety procedures (Ref. TASK 29-00-00-910-002).
(2)
Disconnect the electrical connectors.
(a)
Disconnect the electrical connectors (10) and (11) from the control valve (1).
(b)
Put blanking caps on the disconnected electrical connectors.
(3)
Disconnect the hydraulic pipes (6), (7), (8) and (9).
(4)
Put blanking plugs on the disconnected line ends.
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Parking-Brake Electrical Control-Valve 72GG
Figure 401/TASK 32-45-51-991-001
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Parking-Brake Electrical Control-Valve 72GG Figure 401A/TASK 32-45-51-991-001-A
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(5) Remove the control Valve.
(a)
Remove the bolts (2) and the washers (3).
(b)
Remove the bolt (4), the washer (3), the bonding strap (5) and the control valve (1).
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Installation of the Parking-Brake Electrical Control-Valve 72GG
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.
WARNING : MAKE SURE THAT ALL THE CIRCUITS IN MAINTENANCE ARE ISOLATED BEFORE
_______ YOU SUPPLY ELECTRICAL POWER TO THE AIRCRAFT.
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 : OBEY THE HYDRAULIC SAFETY PROCEDURES.
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