(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)
Remove the blanking plugs.
(5)
Obey the hydraulic safety procedures (Ref. TASK 29-00-00-910-002).
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(6) 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 hydraulic pipe connectors on the control valve (3).
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 32-45-51-420-050
A. Installation 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)
Apply SEALANTS (Material No. 09-018) to the component interfaces.
(3)
Put the control valve (1) in position and install the washers (3) and the bolts (2).
(4)
Connect the bonding straps.
(a) Put the bonding strap (5) in position and install the washer (3) and the bolt (4) (Ref. TASK 20-28-00-912-004).
(5)
Connect the hydraulic pipes.
(a)
Remove the blanking plugs from the disconnected line ends.
(b)
Make sure that the hydraulic line end-fittings are serviceable.
(c)
Connect the hydraulic pipe (6) to the union "C" and TORQUE to between 5.4 and 5.9 m.daN (39.82 and 43.51 lbf.ft).
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(d)
Connect the hydraulic pipe (7) to the union "D" and TORQUE to between 1.3 and 1.7 m.daN (115.04 and 150.44 lbf.in).
(e)
Connect the hydraulic pipe (8) to the union "A" and TORQUE to between 5.4 and 5.9 m.daN (39.82 and 43.51 lbf.ft).
(f)
Connect the hydraulic pipe (9) to the union "B" and TORQUE to between 1.3 and 1.7 m.daN (115.04 and 150.44 lbf.in).
(g)
Mark the pipe connectors with PAINTS FOR DETAIL (INTERNAL AND EXTERN AL) (Material No. 07-010).
(6)
Remove the blanking caps from the electrical connectors.
(7)
Make sure that the electrical connectors are clean and in the correct condition.
(8)
Connect the electrical connectors (10) and (11) to the control valve (1).
Subtask 32-45-51-860-052
B. Preparation for Test
(1)
Connect the PTU isolation coupling (Ref. TASK 29-23-00-860-002).
(2)
If necessary fill the reservoir of the Yellow hydraulic system to the correct level (Ref. TASK 12-12-29-611-001).
(3) Open the right MLG door (Ref. TASK 32-12-00-010-001). Subtask 32-45-51-865-052
C. 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 32-45-51-870-050
D. Bleed the high-pressure alternate braking system (Ref. TASK 32-43-00-870-002).
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E. Test
(1)
Do the operational test of the parking brake system (Ref. TASK 32-45-00-710-001).
(2)
Make sure there is no hydraulic fluid leakage from the control valve 72GG.
5. Close-up
________ Subtask 32-45-51-410-050
A. Close Access WARNING : OBEY THE MANUFACTURER'S INSTRUCTIONS WHEN YOU USE THE SPECIAL
_______
MATERIAL.
THIS MATERIAL IS DANGEROUS.
