(2)
Make sure that the Yellow hydraulic system is depressurized (Ref. TASK 29-10-00-864-002).
(3)
Make sure that the reservoir of the Yellow hydraulic system is depressurized (Ref. TASK 29-14-00-614-001).
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B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged
-------------------------------------------------------------------------------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
Subtask 32-45-14-941-051
C. Make sure that the warning notices are 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.
Subtask 32-45-14-560-050
D. Preparation of the Replacement Component
(Ref. Fig. 401/TASK 32-45-14-991-001)
(1)
Remove the union (4) from the removed parking brake valve (2).
(2)
Remove and discard the packing (3).
WARNING : OBEY THE HYDRAULIC SAFETY PROCEDURES.
_______
(a) Apply HYDRAULIC FLUIDS (Material No. 02-003), HYDRAULIC FLUIDS (Material No. 02-003A), HYDRAULIC FLUIDS (Material No. 02-003B), HYDRAULIC FLUIDS (Material No. 02-003C) or HYDRAULIC FLUIDS (Material No. 02-003D) to:
-
the threads of the union (4),
-
the threads of the new parking brake valve (2),
-
the new packing (3).
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(b)
Put the packing (3) on the union (4) and install the union (4) in the parking brake valve (2).
(c)
TORQUE the union (4) to between 3.19 and 3.47 m.daN (23.52 and
25.58 lbf.ft). Subtask 32-45-14-560-051
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 32-45-14-991-001) Subtask 32-45-14-420-050
A. Installation of the Parking Brake Valve 2579GM WARNING : OBEY THE MANUFACTURER'S INSTRUCTIONS WHEN YOU USE THE SPECIAL
_______
MATERIAL.
THIS MATERIAL IS DANGEROUS.
(1)
Apply SEALANTS (Material No. 09-018) to the component interface.
(2)
Put the parking brake valve (2) in position and install the washers
(7) and bolts (8).
(3)
Remove the blanking plugs.
(4)
Connect the connector (5) to the union (4).
(5)
Connect the connectors (1) and (6) to the parking brake valve (2).
(6)
TORQUE the connectors (5) and (6) to between 5.4 and 5.9 m.daN (39.82 and 43.51 lbf.ft).
(7)
TORQUE the connector (1) to between 1.5 and 1.7 m.daN (11.06 and
12.53 lbf.ft).
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(8) Mark the connectors with PAINTS FOR DETAIL (INTERNAL AND EXTERN AL) (Material No. 07-010).
Subtask 32-45-14-865-053
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 1GG, 2GG, 3GG, 4GG, 61GG, 70GG, 71GG, 3700GD, 3701GD, 3801GX, 3802GX, 3803GX.
Subtask 32-45-14-860-052
C. Preparation for Installation
(1) Connect the PTU isolation coupling (Ref. TASK 29-23-00-860-001).
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