Parking Brake Module Installation
Figure 401
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A
747-400 MAINTENANCE MANUAL
S 494-020
WARNING:_______ YOU MUST CAREFULLY DO THE STEPS IN THE TASK BELOW TO INSTALL
THE DOOR LOCKS ON THE LANDING GEAR DOORS. THE DOORS CAN CLOSE
QUICKLY IF YOU DO NOT INSTALL THE DOOR LOCKS CORRECTLY. THIS
CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(2)
Do this task: "Installation of the Door Locks on the Wing Landing Gear" (AMM 32-00-30/201).
S 494-022
(3)
Do this task: "Installation of the Door Locks on the Body Landing Gear" (AMM 32-00-30/201).
S 864-009
(4)
Supply electrical power (AMM 24-22-00/201).
S 864-010
(5)
Make sure this circuit breaker is closed:
(a)
P6 Main Power Distribution Panel 1) 6L18 PARK BRAKE
S 494-011
(6)
Install chocks at all wheels.
S 844-059
(7)
Release the parking brake.
S 214-060
(8)
Make sure that the PARKING BRAKE ON indication does not show on the EICAS.
S 864-014
(9)
Open this circuit breaker and attach a DO-NOT-CLOSE tag:
(a)
P6 Main Power Distribution Panel 1) 6L18 PARK BRAKE
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S 864-017
(10)
Remove pressure from hydraulic system 4 (AMM 29-11-00/201).
S 844-061
(11)
Release hydraulic fluid from the brake accumulator:
(a)
Look at the HYD BRAKE PRESS gage on the captain's instrument panel.
(b)
Push on the brake pedals fully 10 times.
(c)
Make sure the pressure does not decrease the last time you operate the brake pedals.
D.
Procedure
S 024-055
(1)
Remove the parking brake module.
(a)
Disconnect the DV23 electrical connector from the electric motor on the parking brake module.
(b)
Put a cap on the plug and the receptacle.
(c)
Disconnect the hydraulic lines (3 locations) from the parking brake module.
(d)
Hold the parking brake module and remove 4 nuts, washers and bolts.
(e)
Remove the parking brake module from the mounting bracket.
S 034-028
(2) Remove the adapters from the module and discard the O-rings.
TASK 32-44-04-424-029
3. Installation of the Parking Brake Module (Fig. 401)________________________________________
A. Standard Tools and Equipment
(1)
Bonding Meter (AMM 20-22-01/601)
B.
Consumable Materials
(1)
D00288 Lubricant - MCS 352
C.
References
(1)
AMM 09-11-00/201, Towing
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747-400
MAINTENANCE MANUAL
(2)
AMM 20-22-01/601, Electrical Bonding
(3)
AMM 24-22-00/201, Manual Control
(4)
AMM 29-11-00/201, Main Hydrualic Supply System
(5)
IPC 32-44-04 Fig. 1
(6)
SSM 32-44-01
(7)
WDM 32-44-11
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